User Tools

Site Tools


service_notes:service_note_index1

Service Notes Index

This page is currently under construction (Wolfgang Schraml).

If you have any Service Notes not already listed, please reach out to me via PM on groups.io.

Model Number Service Note Type Service Note Number Service Note Description Date
175A Modification Recommended 175A-1A SWEEP AND GATE OUTPUT MODIFICATION KIT; HP Stock No. 175A-95A 1963-04
175A Modification Recommended 175A-2A Serials Below 326-01376 - Thermal Switch Assembly Modification Kit – hp Stock NO. 175A-95E 1986-01
175A Modification Recommended 175A-5 Serials Below 413-02326 – Modification of 175A for 1784A Recorder Plug-in 1965-04
175A Modification Recommended 175A-6 Serial Prefix Below 450- New Vertical Output Printed Circuit Board 175A-65W 1965-04
175A Modification Recommended 175A-7 All Serials – Improved Sweep Operation 1965-04
175A Modification Recommended 175A-8 Serial Prefixes Below 436- INCREASED VERTICAL DC STABILITY 1965-07
175A Modification Recommended 175A-9 All Serials – Improved Trigger Circuit Stability 1965-10
175A Modification Recommended 175A-10 Serials Prefixed Below 326- Fan Filter Replacement Kit 00175-69501 1965-10
175A Modification Recommended 175A-11 Serials Below 530-04101 – IMPROVED HIGH FREQUENCY TRIGGERING 1965-12
175A Modification Recommended 175A-12 Serial Prefix 530- and Below - Improved Complex Waveform Triggering – Parts Kit # 00175-69502 1966-03
175A Modification Recommended 175A-14 Serial Numbers 633-04850 and Below - Improved Triggering Stability 1966-11
175A Modification Recommended 175A-15 Serial No. 633-06036 and Below - Thermal Switch Assembly Modification Kit – hp Stock NO. 175A-95F 1968-01
202B Modification Recommended 202B-1 PROCEDURE FOR REPLACING MECHANICAL DRIVE CABLES ON MODEL 202B 1954.07.28
211A Modification Recommended 211A-1A Serial No. 1463 and Below - REPLACEMENT FAN KIT hp STOCK NO. 211A-95A 1965-12
330B Modification Recommended 330B-3E MODELS 330B, 330C, & 330D DISTORTION ANALYZERS TEST PROCEDURE unknown
346C Modification Recommended 346C-02 Mod eliminates 425MHz spurious oscillations 1994.05.26
382A Modification Recommended 382A-1A MODELS G382A, C382A, J382A, H382A, X382A AND P382A - BROADBAND PRECISION WAVEGUIDE VARIABLE ATTENUATOR – CALIBRATION AND ALIGNMENT PROCEDLTRES unknown
400D Modification Recommended 400D-2C MODELS 400D, 400H, AND 400L VACUUM TUBE VOLTMETERS - TEST, ADJUSTMENT, AND CERTIFICATION METHODS 1965-06
400D Modification Recommended 400D-4B MODEL 400D/H VACUUM TUBE VOLTMETERS - 400D serial 17970 and below, 400H serial 2237 and below - REDUCTION OF RESIDUAL NOISE MODIFICATION KIT - HP STOCK NO. 400D-95B 1968-06
410C Safety 410C-14A-S ELIMINATION OF A POTENTIAL SAFETY HAZARD 1976-01
412A Modification Recommended 412A-2A REPLACEMENT OF RANGE SWITCH ASSEMBLY – STOCK NO. 412A-19W unknown
412A Modification Recommended 412A-4 SERIAL 004-03632 AND BELOW – BIAS CIRCUIT IMPROVEMENTS unknown
412A Modification Recommended 412A-5 SERIALS 134-07482 AND BELOW - INPUT CABLE MODIFICATION KIT – HP STOCK NO. 412A-95B 1963-06
412A Modification Recommended 412A-6 RANGE SWITCH MAINTENANCE 1964-08
412A Modification Recommended 412A-7 REPLACEABLE PARTS FOR VOLTAGE PROBE ASSEMBLY 1964-12
412A Modification Recommended 412A-8 Serials 134-07482 and Below - INPUT CABLE MODIFICATION KIT, HP PART NO. 00412-69501 1965-01
412A/AR Various 00412-90001 412A/AR DC Vacuum Tube Voltmeter Service Notes Collection 1969-08
412AR Modification Recommended 412AR-2 SERIAL 134-05282 AND BELOW – IMPROVED GROUND CONNECTION unknown
416A Modification Recommended 416A-2A SERIALS PREFIXED 002- & BELOW - REPLACEMENT OF CONTROL TUBE V2 FOR INCREASED STABILITY unknown
432A Information Only 432A-1 An Alternate Method to Calibrate the 432A 1968-11
438A Modification Recommended 438A-13 Modification to Eliminate Measurement Instability 1996-01
438A Modification Recommended 438A-14A Modification to Eliminate Loose Reference Oscillator N-type connectors 1997-07
523DR Modification Recommended 523DR-2 SERIAL NO. 010-00425 AND BELOW – CONNECTIONS FOR STANDBY OPERATION OF CRYSTAL OVEN unknown
523DR Modification Recommended 523DR-3A SERIALS BELOW 826 – TRIGGER UNIT MODIFICATION unknown
608A Modification Recommended P-608A-34 Replacement Attenuator Assembly 1969-02
608B Modification Recommended P-608A-34 Replacement Attenuator Assembly 1969-02
608C Modification Recommended 608C-2 Modification for Regulated DC Filament Operation 1957-01
608C Modification Recommended P-608A-34 Replacement Attenuator Assembly 1969-02
608D Modification Recommended P-608A-34 Replacement Attenuator Assembly 1969-02
608E Modification Recommended P-608A-34 Replacement Attenuator Assembly 1969-02
608F Modification Recommended P-608A-34 Replacement Attenuator Assembly 1969-02
1146B Modification Recommended 1146B-01 All units expected to fail BW measurement accuracy at DC- 100 KHz -3dB spec. Those units having + gain @ at 0.22 dB or @ 15% higher than upper spec (0 dB). 2015.04.30
1156A Modification Recommended 1156A-01 This product 1156A was scheduled to go End of Support in Sept 2016, but to circumstances that were out of Keysight Technologies control we were forced to End Service life prematurely. 2016.06.09
1157A Modification Recommended 1157A-01 This product 1157A was scheduled to go End of Support in Sept 2019, but to circumstances that were out of Keysight Technologies control we were forced to End Service life prematurely. 2016.06.09
1158A Modification Recommended 1158A-02 This product 1158A was scheduled to go End of Support in Sept 2019, but to circumstances that were out of Keysight Technologies control we were forced to End Service life prematurely. 2016.06.09
1310B Modification Recommended 1310B-1 ARCING/BREAKDOWN OF PA CONNECTOR 1981-11
1332A Modification Recommended 1332A-1 Possible Lack of Sufficient Range of Intensity Limit Adjustment if CRT is Replaced 1975-03
1332A Modification Recommended 1332A-2 Preferred parts replacement for resistors A1R86 and A1R87 used with Model 1332A Option 216 1975-06
1332A Modification Recommended 1332A-5 IMPROVED RELIABILITY FOR TilE Z-AXIS AMPLIFIER 1977-04
1333A Modification Recommended 1333A-1 IMPROVED RELIABILITY FOR THE Z-AXIS AMPLIFIER 1977-04
1335A Modification Recommended 1335A-2 Improved Storage Circuitry Reliability 1977-04
1335A Modification Recommended 1335A-3 Improved Reliability For The Z-Axis Amplifier 1977-04
1660A Priority Safety 1660A-02-S Potentially defective line filter may cause shock hazard 1996.03.14
1660AS Priority Safety 1660AS-02-S Potentially defective line filter may cause shock hazard 1996.03.14
1660C Safety 1660C-01-S Potentially defective line filter may cause shock hazard 1996.03.14
1660CS Safety 1660CS-01-S Potentially defective line filter may cause shock hazard 1996.03.14
1660CS Modification Available 1660CS-03A Error in the Threshold Accuracy Test 2002.05.29
1661A Priority Safety 1661A-02-S Potentially defective line filter may cause shock hazard 1996.03.14
1661AS Safety 1661AS-02-S Potentially defective line filter may cause shock hazard 1996.03.14
1661C Safety 1661C-01-S Potentially defective line filter may cause shock hazard 1996.01.31
1661CS Safety 1661CS-01-S Potentially defective line filter may cause shock hazard 1996.01.31
1662A Modification Recommended 1662A-1 Correct Software Error/Flash ROM Failure 1994-10
1662A Safety 1662A-02-S Potentially defective line filter may cause shock hazard 1996.01.31
1662AS Safety 1662AS-02-S Potentially defective line filter may cause shock hazard 1996.01.31
1662C Safety 1662C-01-S Potentially defective line filter may cause shock hazard 1996.01.31
1662CS Safety 1662CS-01-S Potentially defective line filter may cause shock hazard 1996.01.31
1663A Priority Safety 1663A-02-S Potentially defective line filter may cause shock hazard 1996.03.14
1663AS Safety 1663AS-02-S Potentially defective line filter may cause shock hazard 1996.01.31
1663C Priority Safety 1663C-01-S Potentially defective line filter may cause shock hazard 1996.01.31
1663CS Safety 1663CS-01-S Potentially defective line filter may cause shock hazard 1996.01.31
1664A Safety 1664A-01-S Potentially defective line filter may cause shock hazard 1996.01.31
1670A Safety 1670A-01-S Potentially defective line filter may cause shock hazard 1996.01.31
1671A Safety 1671A-01-S Potentially defective line filter may cause shock hazard 1996.01.31
1672A Safety 1672A-01-S Potentially defective line filter may cause shock hazard 1996.01.31
1680AD Modification Available 1680AD-01 Japanese Help System now available. 2002.02.26
1690A Modification Available 1690A-01 Japanese Help System now available. 2002.02.26
1690AD Modification Available 1690AD-01 Japanese Help System now available. 2002.02.26
1710A Modification Recommended 1710A-1 Vertical Amplifier Protection Modification 1973-11
1710A Modification Recommended 1710A-2 CRT Burn Protection Modification 1974-01
1710A Modification Recommended 1710A-3 Modification to change Synchronized Chop Mode to a Free-running Chop Mode 1974-03
1710A Modification Recommended 1710A-4 Probe Power Modification 1974-04
1730B Modification Recommended 1730B-01 System may hang or crash reporting an error with port 3. 2003.08.21
1750B Modification Recommended 1750B-1 Serials Below 435-00176 – Increased Frequency Response 1965-04
1750B Modification Recommended 1750B-2 Serials Below 543-00616 - Improved B Trigger Out; Parts Kit 01750-69501 1965-11
1750B Modification Recommended 1750B-3 Serials Beginning with 516-00426 – Selected Transistor Replacement for Optimum Pulse Response 1965-10
1750B Modification Recommended 1750B-4 Serial Prefixes Below 516- Improved DC Balance; Parts Kit #01750-69502 1965-11
1781B Modification Recommended 1781B-1 Serials below 415-01026 - INCREASED MIXED SWEEP STABILITY 1964-07
1980A/B Modification Recommended 1980A-2 All Serial Prefixes – PROPER LINE FUSING 1980-10
1980A/B Modification Recommended 1980B-5 Serials Prefixed 2131A-and Below - HP-IB TALK/LISTEN AND ROM REPLACEMENT 1981-08
1980A/B Modification Recommended 1980B-5A Serials Prefixed 2131A-and Below - HP-IB TALK/LISTEN AND ROM REPLACEMENT 1981-11
1980A/B Modification Recommended 1980B-6 Serials Prefixed 2131A-and Below – REPLACEMENT OPERATING ROMs 1981-08
1980A/B Modification Recommended 1980B-7 Serials Prefixed 2131A-and Below OPERATING/PROGRAMMING COMPATIBILITY (between different vintage Instruments) 1981-08
3235E Modification Recommended 3235E-16A Recommended AC switch replacement eliminates intermittent failures 1992.08.31
3235E Modification Recommended 3235E-15 Procedure replaces weak links on mass quick interconnect mechanism 1992.02.29
3456A Modification Available 3456A-13A MODIFICATION FOR DIGITAL CIRCUITRY ENHANCEMENT 1988-03
3456A Modification Available 3456A-14A ENHANCING ANALOG CIRCUITRY 1988-03
3456A Modification Available 3456A-15B ENHANCEMENT OF MAIN CONTROLLER BOARD (A4) 1988-06
3456A Safety 3456A-24A-S Exposed high voltage potentials when servicing 3456A 1991.11.21
3458A Modification Recommended 3458A-01C A/D linearity improvement. 2002.04.08
3458A Information Only 3458A-04A Apparent failure at turn-on or when given a “RESET” command 2002.04.09
3458A Modification Recommended 3458A-06A Modification to fix Hardware error ""ac offset dac 10mV invalid cal value: 184"". 2002.04.08
3458A Modification Recommended 3458A-07B Modification to fix intermittent error ""Multislope Rundown Conversion"". 2002.04.09
3458A Information Only 3458A-08A Incorrectly Labeled Line Voltage Switches May Cause Switch Setting Confusion 2002.04.10
3458A Information Only 3458A-10A 3458A Documentation Available As “On-Line” Files 2002.04.10
3458A Modification Available 3458A-11A Reduction of ac noise when measuring ACV and using twisted shielded pair cables. 2002.04.09
3458A Modification Available 3458A-12B Outguard Firmware Upgrade: Enhancements, Fixes, & Changes (Rev. 8) 2002.04.11
3458A Modification Available 3458A-12C Outguard Firmware Upgrade: Enhancements, Fixes, & Changes (Rev. 9) 2010.12.12
3458A Modification Recommended 3458A-13A GPIB communication failures using the 3458A. 2002.04.10
3458A Information Only 3458A-14B Calibration Error After Power “On” or After an “ACAL” 2002.05.20
3458A Information Only 3458A-15C CAL RAM Battery Preventative Maintenance for the Outguard Controller (A5) Assembly 2006.10.20
3458A Information Only 3458A-15D CAL RAM Battery Preventative Maintenance for the Outguard Controller (A5) Assembly 2010.03.12
3458A Information Only 3458A-16 The original 3458A fan filter (3150-0300) is no longer available. The replacement fan filter uses three unique parts. 2002.11.07
3458A Information Only 3458A-17 Errors May Occur if ACAL AC is Initiated From the 4-Wire Ohms Function 2004.11.17
3458A Modification Recommended 3458A-18A Time Drift issues 2007.02.12
3458A Information Only 3458A-19A The original 3458A A5 (PC Assy-Outgard Controller) is no longer available. The replacement kit consists of two unique parts and an installation note. 2007.04.10
3458A Modification Recommended 3458A-20 Bad SRAM causing Cal Ram batteries to fail prematurely 2008.12.03
3499A Modification Recommended 3499A-01 DC power wire replacement to lessen noise level 2000.11.07
3499A Modification Recommended 3499A-02 Heavy inductive load may cause display to go dark or freeze up 2000.11.07
3499A Modification Recommended 3499A-03B No display or blinking after turn on. Battery leakage 2001.05.29
3499A Modification Recommended 3499A-05B Blinking or a dark display due to a defect in the battery back-up circuit 2002.09.04
3499B Modification Recommended 3499B-01 DC power wire replacement to lessen noise level 2000.11.07
3499B Modification Recommended 3499B-02 Heavy inductive load may cause display to go dark or freeze up 2000.11.07
3499B Modification Recommended 3499B-03B No display or blinking after turn on. Battery leakage 2001.05.29
3499B Modification Recommended 3499B-05B Blinking or a dark display due to a defect in the battery back-up circuit 2002.09.04
3582A Modification Available 3582A-16 Modification to A13 Rev. D board for use in older 3582As 1991.12.12
3582A Modification Available 3582A-17 Modification to A13 Rev. D board for use in older 3582As 1992.04.09
3582A Modification Available 3582A-18 Modification to prevent A1K6 input relay from welding shut 1993.02.20
3785A Modification Available 3785A-25 Mod ensures conformance to performance test 1993.05.31
3787B Modification Available 3787B-12 Instructions on retrofitting Opt 003 (voice channel output) 1992.04.30
3789B Modification Available 3789B-02A Retrofitting options 002 (2nd measu) and 003 (2nd measu & DS3 jitter measu) 1992.04.30
3789B Modification Available 3789B-04B Modification eliminates noise from HP 3789B input port 1994.08.04
4062C Modification Recommended 4062C-05 Recommended replacement of incorrect AC line breaker 1992.03.31
4062C Modification Recommended 4062C-09A Solution for open relay coil failure 1999.02.17
4062F Modification Recommended 4062F-02 Design change of cabinet front door 1997.02.10
4062F Modification Recommended 4062F-03 Modification to improve heat dissipation 1997.02.10
4062F Modification Recommended 4062F-07A Solution for open relay coil failure 1999.02.17
4062UX Modification Recommended 4062UX-05 Recommended replacement of incorrect AC line breaker 1992.03.31
4062UX Modification Recommended 4062UX-10A Solution for open relay coil failure 1999.02.17
4142B Modification Recommended 4142B-10 Recommended replacement of F5 & F6 fuses on the A1 power supply 1992.03.31
4142B Modification Recommended 4142B-12 HCU's current compliance may occur unexpectedly 1995.01.11
4142B Modification Recommended 4142B-13 ROM replacement to correct PT command default pulse width 1996.06.13
4145B Modification Recommended 4145B-02A SMU brd mod prnts spike when measurng amps with a rnge chnge 1994.06.23
4145B Modification Recommended 4145B-06 New fan eliminates excess noise 1992.03.31
4155A Modification Recommended 4155A-01 Updating the preliminary ROMs with formal-released ROMs 1994.03.10
4155A Modification Recommended 4155A-02 New power supply prevents shut-down failures 1994.10.10
4155A Modification Recommended 4155A-03 Motherboard replment for SMU selftest/selfcalib error 10x24 1994.11.03
4155A Modification Recommended 4155A-04 New front panel prevents rotary knob from rubbing front panel 1994.11.03
4155A Modification Recommended 4155A-05 New front panel prevents push button keys from sticking 1994.11.03
4155A Modification Recommended 4155A-06 Replacing CPU board ROMs fixes firmware defects 1995.02.16
4155A Modification Recommended 4155A-07 Replacing CPU board ROMs fix firmware defects 1996.06.13
4155A Modification Recommended 4155A-09A Power Supl Replcmnt to Prevent Shutdown/Reboot Problem 2000.01.17
4155A Modification Recommended 4155A-10A Replacing CPU board ROMs to fix firmware defects 1998.10.07
4155A Modification Recommended 4155A-11 SMU controller firmware update to fix SMU glitch problem 1998.10.07
4155A Modification Recommended 4155A-12 SMU controller firmware update to use 41501B expander 1998.10.07
4155A Modification Recommended 4155A-13 Firmware update to fix SMU glitch problem 1998.11.23
4155B Modification Recommended 4155B-01 SMU controller firmware update to fix SMU glitch problem 1998.10.07
4155B Modification Recommended 4155B-02 CPU board replacement to prevent startup failures 1998.10.07
4155B Modification Recommended 4155B-03 Firmware update to fix SMU glitch problem 1998.11.10
4155B Modification Recommended 4155B-04 Firmware update to fix CPU restart problem 1998.11.10
4155B Modification Recommended 4155B-05 CPU board replacement to prevent startup failures 1999.02.17
4155B Modification Recommended 4155B-07 Firmware update to remedy units not responding in pulsed sweep mode 1999.02.17
4155B Modification Recommended 4155B-08 New firmware fixes incorrect measurement status problem 1999.06.23
4155B Modification Recommended 4155B-09 Main power switch is stuck 2000.10.25
4155B Modification Recommended 4155B-10 Firmware update to fix some problems 2001.06.07
4155B Modification Recommended 4155B-11 Firmware update to fix whining noise from CPU board beeper 2001.06.18
4155B Information Only 4155B-12 LCD Replaceable Unit Change 2003.11.24
4155C Modification Recommended 4155C-01 Firmware update to fix HRVSU/VMU Diag Fail problem 2001.05.29
4155C Modification Recommended 4155C-02 Firmware update to fix some problems 2001.06.07
4155C Modification Recommended 4155C-03 Firmware update to fix whining noise from CPU board beeper 2001.06.18
4155C Modification Recommended 4155C-04 LCD Picture Intermittently Reverses Or Is Not Displayed 2003.11.30
4155C Modification Recommended 4155C-05 LCD Picture Intermittently Reverses or is not Displayed 2006.05.07
4156A Modification Recommended 4156A-01 Updating the preliminary ROMs with formal-released ROMs 1994.03.10
4156A Modification Recommended 4156A-02 New power supply prevents shut-down failures 1994.10.10
4156A Modification Recommended 4156A-03 Repair for SMU selftest/selfcalibration error 10x24 1994.11.03
4156A Modification Recommended 4156A-04 New front panel prevents rotary knob from rubbing front panel 1994.11.03
4156A Modification Recommended 4156A-05 New front panel prevents push button keys from sticking 1994.11.03
4156A Modification Recommended 4156A-07 Replacing CPU board ROMs fixes firmware defects 1995.02.16
4156A Modification Recommended 4156A-08 Replacing CPU board ROMs fix firmware defects 1996.06.13
4156A Modification Recommended 4156A-10A Power Supl Replcmnt to Prevent Shutdown/Reboot Problem 2000.01.17
4156A Modification Recommended 4156A-11A Replacing CPU board ROMs to fix firmware defects 1998.10.07
4156A Modification Recommended 4156A-12 SMU controller firmware update to fix SMU glitch problem 1998.10.07
4156A Modification Recommended 4156A-13 SMU controller firmware update to use 41501B expander 1998.10.07
4156A Modification Recommended 4156A-14 Firmware update to fix SMU glitch problem 1998.11.23
4156B Modification Recommended 4156B-01 SMU controller firmware update to fix SMU glitch problem 1998.10.07
4156B Modification Recommended 4156B-02 CPU board replacement to prevent startup failures 1998.10.07
4156B Modification Recommended 4156B-03 Firmware update to fix SMU glitch problem 1998.11.10
4156B Modification Recommended 4156B-04 Firmware update to fix CPU restart problem 1998.11.10
4156B Modification Recommended 4156B-05 CPU board replacement to prevent startup failures 1999.02.17
4156B Modification Recommended 4156B-07 Firmware update to remedy units not responding in pulsed sweep mode 1999.02.17
4156B Modification Recommended 4156B-08 New firmware fixes incorrect measurement status problem 1999.06.23
4156B Modification Recommended 4156B-09 Main power switch is stuck 2000.10.25
4156B Modification Recommended 4156B-10 Firmware update to fix some problems 2001.06.07
4156B Modification Recommended 4156B-11 Firmware update to fix whining noise from CPU board beeper 2001.06.18
4156C Modification Recommended 4156C-01 Firmware update to fix HRVSU/VMU Diag Fail problem 2001.05.29
4156C Modification Recommended 4156C-02 Firmware update to fix some problems 2001.06.07
4156C Modification Recommended 4156C-03 Firmware update to fix whining noise from CPU board beeper 2001.06.18
4156C Modification Recommended 4156C-04 LCD Picture Intermittently Reverses Or Is Not Displayed 2003.11.30
4156C Modification Recommended 4156C-05 LCD Picture Intermittently Reverses or is not Displayed 2006.05.07
4263B Modification Recommended 4263B-01 Firmware upgrade corrects ADC error in DC biased measurement 1996.11.21
4263B Modification Recommended 4263B-02 Mod to prevent ""ADC FAILURE"" after power on / Reset is done 1998.12.14
4263B Modification Recommended 4263B-03 Modification to prevent ""EEPROM R/W FAILED"" 1998.12.14
4263B Modification Recommended 4263B-04 Mod to prevent ""ADC FAILURE"" when Recall function is used 1998.12.14
4263B Modification Recommended 4263B-05 The HP4263B short correction value is large by only 100kHZ on the Test Fixture 1999.06.23
4263B Modification Recommended 4263B-06 Measurement accuracy may be out of specification 2001.02.12
4263B Modification Recommended 4263B-07A Modification to fix intermittent illigal data readings 2001.08.22
4263B Modification Recommended 4263B-08 Incorrect characters might be displayed on rare occasions. 2004.09.21
4268A Modification Recommended 4268A-01 Modification to prevent missing an external trigger signal 2000.10.31
4268A Priority Safety 4268A-03-S A broken AC inlet may potentially result in a electric shock hazard 2000.10.08
4284A Modification Recommended 4284A-11A Modification prevents bias current source fuse from blowing 1995.01.11
4284A Modification Recommended 4284A-13 Mod to eliminate ""Scanner data CSUM error"" 2000.11.12
4284A Modification Recommended 4284A-16 Modification Required to Add A20 GPIB Interface 2003.04.01
4285A Modification Recommended 4285A-09A Mod prevents bias current source fuse from blowing 1995.01.11
4285A Modification Recommended 4285A-11 Mod to eliminate ""Scanner data CSUM error"" 2000.11.12
4286A Modification Recommended 4286A-04 Modification to fix Internal Real Time Clock Delay trouble 1998-07
4287A Modification Recommended 4287A-01A Mod to fix booting problem 2000.11.12
4287A Modification Recommended 4287A-02 Repair of error ""Power on test faild"" about applicable serial number. 2001.12.18
4287A Modification Recommended 4287A-07A “PLL unlock” Error Message due to A3 Source Board Failure 2008.07.09
4287A Modification Recommended 4287A-08 Abrupt hang-up in continuous measurements 2007.02.06
4287A Modification Recommended 4287A-10 Unable to detect GPIB card causing slow response in measurement 2007.08.08
4288A Modification Recommended 4288A-01 Firmware update for bug fix 2001.05.24
4288A Modification Recommended 4288A-03 Incorrect items for instrument setup screens might be displayed on rare occasions. 2004.09.21
4288A Modification Recommended 4288A-04A The specification of D factor at 1MHz becomes out of specification because of the wrong linearity 2006.06.04
4288A Modification Recommended 4288A-06 E21 Save Failed problem on Save function and OVLD display problem on Multi Compensation function 2007.01.29
4291A Modification Recommended 4291A-04 Modification to fix Internal Real Time Clock Delay trouble 1998-07
4291B Modification Recommended 4291B-01 Mod to fix intermittent display problem 1998.10.07
4291B Modification Recommended 4291B-02A To fix internal real time clock delay trouble 1998.11.10
4291B Modification Recommended 4291B-03 Mod to fix sample program error for high temp. option 013 & 014 1998.11.10
4291B Modification Recommended 4291B-04 Measured accuracy test fail 1998.11.10
4291B Safety 4291B-05-S Power supply does not comply with CSA950/IEC950 stadards 1998.12.14
4291B Modification Recommended 4291B-06 No display when power is on 1998.08.09
4291B Priority Safety 4291B-07-S A broken AC inlet may potentially result in a electric shock hazard 2000.10.08
4291B Modification Recommended 4291B-08A Power-on failure due to a stressed Capacitor on the DC-DC Converter Board. 2002.05.01
4294A Modification Recommended 4294A-01 External tests for analog circuits 2002.11.02
4294A Safety 4294A-02A-S A broken AC inlet may potentially result in an electric shock hazard. 2012.02.27
4294A Modification Recommended 4294A-03A Power-on failure due to a stressed Capacitor on the DC-DC Converter Board. 2002.05.01
4294A Modification Recommended 4294A-04 Intermittent failure about A8 (Vector Ratio Detector) 2002.05.27
4338B Modification Recommended 4338B-01 Incorrect characters might be displayed on rare occasions. 2004.09.28
4339B Modification Recommended 4339B-01 Mod to prevent "":SYST:ERR?"" HP-IB command problem 1999.02.17
4339B Modification Recommended 4339B-02 Mod to prevent unit from hanging up when improper OPEN correction is performed 1999.02.17
4339B Modification Recommended 4339B-03 Mod to fix incorrect Handler Interface signal 1999.02.17
4339B Modification Recommended 4339B-04 Incorrect characters might be displayed on rare occasions 2004.09.27
4339B Modification Recommended 4339B-05 Offset Voltage Test might fail, during PVT 2017.09.18
4349B Modification Recommended 4349B-01 Modification to prevent ":SYST:ERR?" HP-IB command problem 1998.12.31
4349B Modification Recommended 4349B-02 Mod to prevent unit from hanging up when improper OPEN correction is performed 1999.02.17
4349B Modification Recommended 4349B-03 Mod to fix incorrect Handler Interface signal 1999.02.17
4349B Modification Recommended 4349B-04 Incorrect characters might be displayed on rare occasions. 2004.09.28
4349B Modification Recommended 4349B-05 Remedy for OVLD display due to incomplete soldering of capacitor on A1board 2006.10.04
4352A Modification Recommended 4352A-01 Modification to fix Internal Real Time Clock Delay trouble 1998-07
4352B Safety 4352B-07-S POWER SUPPLY DOES NOT COMPLY WITH CSA950/IEC950 STANDARDS 1998.06.30
4352B Priority Safety 4352B-08-S A broken AC inlet may Potentially result in a electric shock hazard. 2000.08.31
4395A Modification Recommended 4395A-02 Mod to prevent intermittent display problem 1998.10.13
4395A Modification Recommended 4395A-03 Mod to prevent intermittent display problem 1998.10.13
4395A Modification Recommended 4395A-05 Mod to fix internal real time clock delay trouble 1998.10.07
4395A Safety 4395A-06-S POWER SUPPLY DOES NOT COMPLY WITH CSA950/IEC950 STANDARDS 1998.07.31
4395A Modification Recommended 4395A-07 No display when power is on 1999.08.09
4395A Priority Safety 4395A-09-S A broken AC inlet may Potentially result in a electric shock hazard. 2000.08.31
4395A Modification Recommended 4395A-10A Power-on failure due to a stressed Capacitor on the DC-DC Converter Board. 2002.05.01
4395A Modification Recommended 4395A-11 Spurious on the trace trouble in Network measurement mode 2001.07.16
4395A Modification Recommended 4395A-16 Firmware upgrade to fix occasional rise in noise floor and the shift of measurement signal in frequency with SA mode. 2005.07.04
4396A Information Only 4396A-01C Firmware Update and A1 CPU Repair Information 1995-02
4396A Modification Recommended 4396A-02 Firmware Upgrade to Correct Auto Zoom and Save/Recall Operations 1993.01.31
4396A Information Only 4396A-03 Repair Procedure for A1 CPU (pn 04396-66501 or pn 04396-66511) 1993.06.14
4396A Information Only 4396A-04 Firmware Update Procedures 1993.06.14
4396A Modification Recommended 4396A-05 A2 Shutdown Circuit Malfunction 1993.06.10
4396A Modification Recommended 4396A-06 “POWER ON TEST FAILED” or “PHASE LOOK LOOP UNLOCKED” at Low Temperature 1993.06.10
4396A Modification Recommended 4396A-07 “POWER ON TEST FAILED” at Low Temperature 1993.06.10
4396A Information Only 4396A-08 New power switch improves reliability 1993.11.23
4396A Modification Recommended 4396A-09 Low RF output level caused by defective A3A3 1994.01.21
4396A Modification Recommended 4396A-10 Modification improves rubber key sticking 1994.01.21
4396A Modification Recommended 4396A-11 Mod. corrects “PHASE LOCKED LOOP UNLOCKED” at high temperature 1994.02.28
4396A Information Only 4396A-12 Option Upgrade Procedure 1994.03.01
4396A Modification Recommended 4396A-13 New firmware corrects some bugs on firmware revision 3.00 1994-10
4396A Modification Recommended 4396A-14A New firmware corrects incorrect GPIB return value of “*TST?” query. 1995-02
4396A Modification Recommended 4396A-16 Modification to fix Internal Real Time Clock Delay trouble 1998-07
4396B Modification Recommended 4396B-01 Modification to prevent power supply failure 1998.03.01
4396B Information Only 4396B-02 Replacement for obsoleted LCD P/N 2090-0534 1998-08
4396B Modification Recommended 4396B-03 Mod to fix intermittent display problem 1998.10.13
4396B Modification Recommended 4396B-04 Mod to prevent intermittent display problem 1998.10.13
4396B Information Only 4396B-05 Use of GSP PN E4970-66552 and LCD PN 2090-0574 may cause a display problem 1998-07
4396B Modification Recommended 4396B-06A Mod to fix internal real time clock delay trouble 2001.07.15
4396B Safety 4396B-07-S POWER SUPPLY DOES NOT COMPLY WITH CSA950/IEC950 STANDARDS 1998.07.31
4396B Modification Recommended 4396B-08 No display when power is on 1999.08.09
4396B Modification Recommended 4396B-09 No recall of compensation data when using Impedance measurement mode 2000.01.17
4396B Priority Safety 4396B-10-S A broken AC inlet may Potentially result in a electric shock hazard. 2000.08.31
4396B Modification Recommended 4396B-11A Power-on failure due to a stressed Capacitor on the DC-DC Converter Board. 2002.05.01
4396B Information Only 4396B-12A Part number changes for LCD 2004.03.23
4396B Information Only 4396B-13 Part Number Changes for Power Supply Switch Parts 2002.09.12
4396B Information Only 4396B-14 New Replaceable Parts for Probe Power Supply 2002.10.08
4800A Modification Available 4800A-02 Thermistor A17R14 Replacement – hp Modification Kit 04800-61043 1968-02
4800A Modification Available 4800A-03 Error in Transformer Wiring 1969-06
4800A Modification Available 4800A-04 Power Supply Modification 1969-10
4934A Modification Recommended 4934A-11A Recommended modification prevents hold circuit failure 1992.10.31
4934A Safety 4934A-15-S Short Circuit Hazard 1997.08.31
4934A Modification Recommended 4934A-16 Instructions for ground modifications 1998.10.13
4934A Modification Recommended 4934A-18 Receive level problem 2001.06.13
4935A Modification Recommended 4935A-16 Modification to correct signal measurement when using receiver hold circuit 1993.02.28
4948A Modification Recommended 4948A-09 Modification fixes measurement hang-up with error code 2000 1992.07.31
4951C Modification Recommended 4951C-14 Modification to eliminate erroneous ABORT frames 1991.05.31
4952A Modification Available 4952A-12B Available firmware upgrade from Rev. 1.0 to Rev. A.02.02 1992.02.29
4952A Modification Available 4952A-17 Real time clock allows captured data in buffer to be time stamped 1993.02.28
4954A Modification Recommended 4954A-08 New firmware revision 2.1 corrects several known problems 1993.02.28
4957A Modification Available 4957A-01C Available option allows high speed option retrofitting 1994.03.10
4957A Modification Recommended 4957A-04 New ROM fixes DLC Data Bus Contention problem/A1UT4 1992.10.31
4957A Modification Recommended 4957A-05A Modification to prevent enlargement or shrinkage of display 1992.02.29
4957A Modification Recommended 4957A-07 Modification to misloaded diodes corrects ""no display"" 1992.02.29
4957A Modification Recommended 4957A-08 Firmware Revision A.00.01 Anomalies 1992.02.29
4957A Modification Available 4957A-09 Katakana option retrofitting 1992.02.29
4957PC Modification Available 4957PC-01B Available option allows high speed option retrofitting 1993.12.31
4957PC Modification Recommended 4957PC-02 New ROMs fix auto-configuration anomaly 1992.02.29
4957PC Modification Recommended 4957PC-03 Modification to stop monitoring and/or simulating 1992.02.29
4957PC Modification Recommended 4957PC-04 Modification correct MASS STORE or LOAD APPLICATION features 1992.04.30
4980A Safety 4980A-02-S Modification to meet grounding standards 1991.10.07
4980A Modification Recommended 4980A-03A Modification to eliminate bad sectors on hard disk drive 1992.05.31
4980A Modification Recommended 4980A-04 Modification prevents trace shorting on the LCD board 1992.04.30
4980A Modification Recommended 4980A-05A Modification to resolve ""Service Request Time-out on Port xxx"" error 1992.05.31
4980A Modification Recommended 4980A-06A Modification to resolve ""Hardware/Software Watchdog Time-out Errors"" 1992.07.31
4980A Modification Available 4980A-07 Directions on upgrading hard disk drive to 105 MByte 1992.06.30
4980A Modification Available 4980A-08 Directions on upgrading capture buffer to 16 MByte 1992.06.30
4980A Modification Recommended 4980A-09 Modification resolves ""bootup/time-out errors"" 1992.10.31
4980A Modification Recommended 4980A-11 LED board mod allows greater range of brightness adjustment 1993.12.12
4981A Safety 4981A-02-S Modification to meet grounding standards 1991.10.07
4981A Modification Recommended 4981A-03 Modification eliminates bad sectors on hard disk drive 1992.04.30
4981A Modification Recommended 4981A-04 Modification prevents trace shorting on the LCD board 1992.04.30
4981A Modification Recommended 4981A-05A Modification to resolve ""Service Request Time-out on Port XXX"" error 1992.06.30
4981A Modification Recommended 4981A-06A Modification to resolve ""Hardware/Software Watchdog Time-out Errors"" 1992.07.31
4981A Modification Available 4981A-07 Directions on upgrading hard disk drive to 105 MByte 1992.06.30
4981A Modification Available 4981A-08 Directions on upgrading capture buffer to 16 MByte 1992.06.30
4981A Modification Recommended 4981A-09 Modification resolves ""bootup/time-out errors"" 1992.10.31
4981A Modification Recommended 4981A-11 LED board mod allows greater range of brightness adjustment 1993.12.12
4982A Safety 4982A-02-S Modification to meet grounding standards 1991.10.07
4982A Modification Recommended 4982A-03 Modification eliminates bad sectors on hard disk drive 1992.04.30
4982A Modification Recommended 4982A-04 Modification prevents trace shorting on the LCD board 1992.04.30
4982A Modification Recommended 4982A-05A Modification to resolve ""Service Request Time-out on Port XXX"" error 1992.06.30
4982A Modification Recommended 4982A-06A Modification to resolve ""Hardware/Software Watchdog Time-out Errors"" 1992.07.31
4982A Modification Available 4982A-07 Directions on upgrading hard disk drive to 105 MByte 1992.06.30
4982A Modification Available 4982A-08 Directions on upgrading capture buffer to 16 MByte 1992.06.30
4982A Modification Recommended 4982A-09 Modification resolves ""bootup/time-out errors"" 1992.10.31
4982A Modification Recommended 4982A-11 LED board mod allows greater range of brightness adjustment 1993.12.12
4985B Modification Recommended 4985B-01 Noise on int buss causes processor to corrupt its internal program 1998.03.01
4985B Modification Recommended 4985B-02 Auto ring speed detection fails 1998.03.01
4986A Modification Recommended 4986A-01 Modification to power modules improves 5 VDC stability 1995.10.31
4991A Modification Recommended 4991A-12 Modification improves reliability of P1 & P2 power supply connections 1992.10.31
4991A Modification Recommended 4991A-13 Modification to fix ""Node Movement, or Node Hopping,"" and network performance 1992.02.29
4992A Modification Recommended 4992A-02 Modification to fix ""Node Movement, or Node Hopping,"" and network performance 1992.02.29
4995A Modification Recommended 4995A-01 Modification eliminates possible power up problems 1993.03.31
4995A Modification Recommended 4995A-02 Jumper wires in serial controller chip improve performance 1994.10.10
4996A Modification Recommended 4996A-01 Modification eliminates possible power up problems 1993.03.31
4996A Modification Recommended 4996A-02 Jumper wires in serial controller chip improve performance 1994.10.10
5004A Modification Available 5004A-1B DATA PROBE THRESHOLD VOLTAGE ADJUSTMENT AND COMPENSATION 1978-08
5335A Modification Recommended 5335A-23 DEGRADED SENSITIVITY WITH SPECIAL OPTION C10 1988-09
5335A Modification Recommended 5335A-24 PREFERRED REPLACEMENT PART FOR A9CR6 AND A9CR4 1988-10
5335A Modification Recommended 5335A-26B Power Supply relay problem 1992.03.23
5343A Safety 5343A-31C-S New cabinet support strut and top cover 1993.01.12
5344A Safety 5344A-01A-S New cabinet support strut and top cover 1993.01.12
5345A Modification Available 5345A-1 Serial prefix 1428- and below. Input amplifier failures. 1975-01
5345A Modification Available 5345A-2 Serial prefix 1428 and above. Input amplifier failures. 1975-04
5345A Information Only 5345A-6 A9 Maingate Assembly troubleshooting procedure 1977-07
5345A Information Only 5345A-7 A11 Scaler Assembly troubleshooting procedure 1977-07
5345A Information Only 5345A-8 A10 Gate Control Assembly troubleshooting procedure 1977-07
5345A Information Only 5345A-9A 9825 HP-IB verification program for 5345A, opt 011 (Supersedes 5345A-9) 1980.02.05
5345A Information Only 5345A-9B HP-IB verification program for 5345A, opt 011 (Supersedes 5345A-9A) 1981-01
5345A Modification Recommended 5345A-10A Serials 1708 and below. Resistor changes on A4 input trigger assembly (05345-60004) to improve performance. (Supersedes 5345A-10) 1979.02.12
5345A Modification Available 5345A-11 All serials. Modification to A7 linear regulator assembly (05345-60007) to improve +15V supply operation 1978.02.03
5345A Information Only 5345A-12B HP-IB verification program for 5345A, Opt. 012 (Supersedes 5345A-12A) 1981-01
5345A Information Only 5345A-13 All serials. Clarification of special extender board compatibility with 5345A counters. 1978-02
5345A Modification Recommended 5345A-14 All serials. Elimination of shorting between circuit boards and board sockets. 1979-05
5345A Modification Recommended 5345A-15 Serials 1920A and below. Modification to improve mechanical interconnection with plug-ins. 1979-06
5345A Modification Recommended 5345A-16 A13 boards with series 1820 and 1912. Modification to prevent miscounting on REG CLK line 1979-06
5345A Modification Recommended 5345A-16A A13 boards with series 1820 and 1912. Modification to prevent miscounting caused by noise on reg. clk. line. 1980-05
5345A Modification Available 5345A-17 All serials. Summary of A3 and A4 Assembly U1 and U2 changes, replacement part numbers, and bias adjustments 1981-03
5345A Information Only 5345A-18 All serials. ROM part number changes. 1981-09
5345A Information Only 5345A-19A All serials. HP-IB verification program for 5345A option 011 using the HP 85A controller. (Supersedes 5345A-19) 1982-01
5345A Modification Available 5345A-21 All serials. HP-IB modification for Option 012 compatibility with HP 1000L series computers. 1981-09
5345A Modification Available 5345A-22 All options and serial number prefixes. Modification to improve input sensitivity 1982-02
5345A Modification Available 5345A-23 Option 012 serials. Modification to allow counter to respond properly to a serial poll by a series 200 controller. 1984-03
5345A Modification Available 5345A-24 5345A serials 21 34A07500 through 2346A10040 used with the 5355A automatic frequency converter plug-in and the 5356A/B/C frequency converter heads. Modification to prevent miscount problem. 1984-03
5345A Modification Available 5345A-25 All serials. Modification to eliminate temperature sensitive input amplifier. 1984-03
5501B Modification Recommended 5501B-02A In many incidences, the temperature adjustment process for the laser heads had been found being adjusted incorrectly. 2002-07
5517A Modification Recommended 5517A-01B Recommended repair of sampler assembly 1995.07.27
5517A Modification Recommended 5517A-02 Recommended repair of sampler assy 1996.03.14
5517A Modification Recommended 5517A-04A Temperature adjustment process 2001.07.16
5517B Modification Recommended 5517B-02 Recommended repair of sampler assy 1996.03.14
5517B Information Only 5517B-03 Laser Head Optical Feedback Reduction 2001.01.03
5517B Modification Recommended 5517B-04A Temperature adjustment process 2001.07.16
5517B Modification Recommended 5517B-05A Controller Board A3F1 Nuisance blows 2006.02.09
5517C Modification Recommended 5517C-02 Recommended repair of sampler assy 1996.03.14
5517C Modification Recommended 5517C-04A Temperature adjustment process 2001.07.16
5517CN05 Modification Recommended 5517C-05B Controller Board A3F1 Nuisance blows 2006.03.16
5517D Modification Recommended 5517D-02 Recommended repair of sampler assy 1996.03.14
5517D Modification Recommended 5517D-04A Temperature adjustment process 2001.07.16
5517DN07 Modification Recommended 5517D-05B Controller Board A3F1 Nuisance blows 2006.03.16
5518A Modification Recommended 5518A-01B Recommended repair of sampler assembly 1995.07.27
5519A Modification Recommended 5519A-02A Temperature adjustment process 2001.07.16
5519B Modification Recommended 5519B-02A Temperature adjustment process 2001.07.16
6012A Modification Recommended 6012A-1 Serial Numbers 1946AOO140 and Below CURRENT MONITOR RESISTOR CHANGE 1981-10
6012A Modification Recommended 6012A-2 Serial Numbers 2116AOO300 and Below – NEW FAN INSTALLATION HARDWARE 1981-10
6012A Modification Recommended 6012A-3 MODIFICATION TO STABILIZE CONTROL BOARD IN PCB EDGE CONNECTOR – Serial Numbers 2121A-00380 and Below 1981-10
6012B Modification Recommended 6012B-08 Misloaded fuse 1998.11.10
6030A Modification Recommended 6030A-13 Modification using RTV to prevent W8 ribbon cable disconnect 1992.04.30
6030A Modification Available 6030A-17 AC input filter assembly replacement 1994.06.23
6030A Modification Recommended 6030A-21 GPIB Communications Error when used with a 59510A or 59511A Relay Box 2002.06.02
6030A Modification Recommended 6030A-22 To correct the “CC” Constant Current mode offset performance anomaly. 2011.05.12
6031A Modification Recommended 6031A-15 Modification using RTV to prevent W8 ribbon cable disconnect 1992.04.30
6031A Modification Available 6031A-19 AC input filter assembly replacement 1994.06.23
6031A Modification Recommended 6031A-23 GPIB Communications Error when used with a 59510A or 59511A Relay Box 2002.06.02
6031A Modification Recommended 6031A-24 To correct the “CC” Constant Current mode offset performance anomaly. 2011.05.12
6032A Modification Recommended 6032A-14 Modification using RTV to prevent W8 ribbon cable disconnect 1992.04.30
6032A Modification Recommended 6032A-19 Misloaded fuse 1998.11.10
6032A Modification Recommended 6032A-22 GPIB Communications Error when used with a 59510A or 59511A Relay Box 2002.06.02
6032A Modification Recommended 6032A-23 To correct the “CC” Constant Current mode offset performance anomaly. 2011.05.12
6033A Modification Recommended 6033A-14 GPIB Communications Error when used with a 59510A or 59511A Relay Box 2002.06.02
6033A Modification Recommended 6033A-15 To correct the “CC” Constant Current mode offset performance anomaly. 2011.05.12
6035A Modification Recommended 6035A-03 Modification using RTV to prevent W8 ribbon cable disconnect 1992.04.30
6035A Modification Recommended 6035A-04 Modification prevents spurious high frequency down programmer FET oscillations 1992.04.30
6035A Modification Recommended 6035A-11 GPIB Communications Error when used with a 59510A or 59511A Relay Box 2002.06.02
6035A Modification Recommended 6035A-12 To correct the “CC” Constant Current mode offset performance anomaly. 2011.05.12
6038A Modification Recommended 6038A-12 GPIB Communications Error when used with a 59510A or 59511A Relay Box 2002.06.02
6038A Modification Recommended 6038A-13 To correct the “CC” Constant Current mode offset performance anomaly. 2011.05.12
6060B Modification Recommended 6060B-02 Safety compliance of RFI Filter capacitor discharge time constant 1993.06.30
6060B Safety 6060B-04A-S Due to poor soldering, the instrument’s internal safety grounding may be faulty. 2010.05.17
6063B Modification Recommended 6063B-02 Safety compliance of RFI Filter capacitor discharge time constant 1993.06.30
6063B Safety 6063B-04A-S Due to poor soldering, the instrument’s internal safety grounding may be faulty. 2010.05.17
6259B Modification Recommended 6259B-3A HP MODELS 6259B, 6260B, 6261B, 6268B, 6269B LVR POWER SUPPLIES - IMPROVED RELIABILITY CHANGES 1980-12
6260B Modification Recommended 6260B-2A HP MODELS 6259B, 6260B, 6261B, 6268B, 6269B LVR POWER SUPPLIES - IMPROVED RELIABILITY CHANGES 1980-12
6261B Modification Recommended 6261B-2 HP MODELS 6259B, 6260B, 6261B, 6268B, 6269B LVR POWER SUPPLIES - IMPROVED RELIABILITY CHANGES 1980-12
6268B Modification Recommended 6268B-2A HP MODELS 6259B, 6260B, 6261B, 6268B, 6269B LVR POWER SUPPLIES - IMPROVED RELIABILITY CHANGES 1980-12
6269B Modification Recommended 6269B-4 HP MODELS 6259B, 6260B, 6261B, 6268B, 6269B LVR POWER SUPPLIES - IMPROVED RELIABILITY CHANGES 1980-12
6541A Modification Recommended 6541A-02A Intermittent Phone Cables 2001.01.31
6542A Modification Recommended 6542A-02A Intermittent Phone Cables 2001.01.31
6543A Modification Recommended 6543A-02A Intermittent Phone Cables 2001.01.31
6544A Modification Recommended 6544A-02A Intermittent Phone Cables 2001.01.31
6545A Modification Recommended 6545A-01A Capacitor C418 May Fail 2002.05.03
6545A Modification Recommended 6545A-03A Intermittent Phone Cables 2001.01.31
6551A Modification Recommended 6551A-02 Intermittent Phone Cables 1999.07.31
6551A Safety 6551A-06 Regulatory noncompliance with the option 901 (Power cord for Australia / New Zealand) 2016.06.08
6552A Modification Recommended 6552A-02 Intermittent Phone Cables 1999.07.31
6552A Safety 6552A-06A-S Regulatory noncompliance with the option 901 (Power cord for Australia / New Zealand) 2017.05.11
6553A Modification Recommended 6553A-02 Intermittent Phone Cables 1999.07.31
6553A Modification Recommended 6553A-04 Bridge Rectifier Failure 1999.11.30
6553A Modification Recommended 6553A-05 Cannot Perform Current Calibration / Alignment 2002.05.30
6553A Safety 6553A-08A-S Regulatory noncompliance with the option 901 (Power cord for Australia / New Zealand) 2017.05.11
6554A Modification Recommended 6554A-02 Intermittent Phone Cables 1999.07.31
6554A Safety 6554A-08 Regulatory noncompliance with the option 901 (Power cord for Australia / New Zealand 2016.06.09
6555A Modification Recommended 6555A-02 Intermittent Phone Cables 1999.07.31
6555A Modification Recommended 6555A-04 Zero ohm resistor breakdown 2001.05.22
6555A Safety 6555A-07 Regulatory noncompliance with the option 901 (Power cord for Australia / New Zealand) 2016.06.08
6571A Modification Recommended 6571A-03 Intermittent Phone Cables 1999.07.31
6571A Modification Recommended 6571A-06A Upgrade for unstable Current Shunts ""R907"" 2003.10.16
6571A Modification Recommended 6571A-08 The four filter capacitors circuit reference (C416-C419) on the A4 AC input board starts leaking electrolyte 2009.08.18
6571A Modification Recommended 6571A-09 The AC INPUT SAFETY COVER has a strain relief used to secure the AC line cord that may become loose. 2009.10.08
6572A Modification Recommended 6572A-03 Intermittent Phone Cables 1999.07.31
6572A Modification Recommended 6572A-05A Upgrade for Unstable Current Shunt ""R907"" 2003.10.16
6572A Modification Recommended 6572A-06 Slow or No Down Programming capability 2006.07.30
6572A Modification Recommended 6572A-08 The four filter capacitors circuit reference (C416-C419) on the A4 AC input board starts leaking electrolyte 2009.08.18
6572A Modification Recommended 6572A-09 The AC INPUT SAFETY COVER has a strain relief used to secure the AC line cord that may become loose. 2009.10.08
6573A Modification Recommended 6573A-03 Intermittent Phone Cables 1999.07.31
6573A Modification Recommended 6573A-05A Upgrade for Unstable Current Shunt ""R409"" 2003.10.16
6573A Modification Recommended 6573A-07 The four filter capacitors circuit reference (C416-C419) on the A4 AC input board starts leaking electrolyte 2009.08.18
6573A Modification Recommended 6573A-08 The AC INPUT SAFETY COVER has a strain relief used to secure the AC line cord that may become loose. 2009.10.08
6574A Modification Recommended 6574A-03 Improper Crimps on Output Transformer & Choke 1999.02.28
6574A Modification Recommended 6574A-04 Intermittent Phone Cables 1999.07.31
6574A Modification Recommended 6574A-07A Upgrade for Unstable Current Shunt ""R907"" 2003.10.16
6574A Modification Recommended 6574A-09 The four filter capacitors circuit reference (C416-C419) on the A4 AC input board starts leaking electrolyte 2009.08.18
6574A Modification Recommended 6574A-10 The AC INPUT SAFETY COVER has a strain relief used to secure the AC line cord that may become loose. 2009.10.08
6575A Modification Recommended 6575A-01 Modification improves reliability of sense protection resistors 1993.01.31
6575A Modification Recommended 6575A-04 Improper Crimps on Output Transformer & Choke 1999.02.28
6575A Modification Recommended 6575A-05 Intermittent Phone Cables 1999.07.31
6575A Modification Recommended 6575A-07A Upgrade for Unstable Current Shunt ""R907"" 2003.10.16
6575A Modification Recommended 6575A-09 The four filter capacitors circuit reference (C416-C419) on the A4 AC input board starts leaking electrolyte 2009.08.18
6575A Modification Recommended 6575A-10 The AC INPUT SAFETY COVER has a strain relief used to secure the AC line cord that may become loose. 2009.10.08
6611C Modification Recommended 6611C-01A RS232/HP-IB Firmware Hang-ups 1999.08.09
6611C Modification Recommended 6611C-04B Unit Exchange Program 2001.01.31
6611C Modification Recommended 6611C-07A On faster computers, when programming over GPIB, a random error will occur. 2005.11.01
6611C Modification Recommended 6611C-760-01B Unit exchange program 2001.05.22
6611C Modification Recommended 6611C-J05-01 RS232/HP-IB Firmware Hang-ups 1998.11.23
6612C Modification Recommended 6612C-04B Unit Exchange Program 2001.01.31
6612C Modification Recommended 6612C-07A On faster computers, when programming over GPIB, a random error will occur. 2005.11.01
6612C Modification Recommended 6612C-760-01B Unit Exchange Program 2001.01.31
6613C Modification Recommended 6613C-04B Unit Exchange Program 2001.01.31
6613C Modification Recommended 6613C-07A On faster computers, when programming over GPIB, a random error will occur. 2005.11.01
6613C Modification Recommended 6613C-760-01B Unit Exchange Program 2001.01.31
6613C Modification Recommended 6613C-RECALL-08 Calibrations performed on some Power Supplies by Agilent Technologies between July 1st, 2011 and July 31st, 2012 show a FALSE PASS in either one or more of the 4 tests: CC LOAD EFFECT, CV LOAD EFFECT, CC SOURCE EFFECT or CV SOURCE EFFECT. 2012.08.19
6614C Modification Recommended 6614C-04B Unit Exchange Program 2001.01.31
6614C Modification Recommended 6614C-07A On faster computers, when programming over GPIB, a random error will occur. 2005.11.01
6614C Modification Recommended 6614C-760-01A Unit exchange program 2001.05.22
6614C Modification Recommended 6614C-760-01B Unit Exchange Program 2001.01.31
6614C Modification Recommended 6614C-RECALL-08 Calibrations performed on some Power Supplies by Agilent Technologies between July 1st, 2011 and July 31st, 2012 show a FALSE PASS in either one or more of the 4 tests: CC LOAD EFFECT, CV LOAD EFFECT, CC SOURCE EFFECT or CV SOURCE EFFECT. 2012.08.19
6621A Modification Recommended 6621A-13 Defective Cable 2000.04.30
6621A Modification Recommended 6621A-14 Intermittent Power Transformer “Magmate” Connections 2002.09.03
6622A Modification Recommended 6622A-11 Defective Cable 2000.04.30
6622A Modification Recommended 6622A-12 Intermittent Power Transformer “Magmate” Connections 2002.09.03
6623A Modification Recommended 6623A-15 Defective Cable 2000.04.30
6623A Modification Recommended 6623A-16 Intermittent Power Transformer “Magmate” Connections 2002.09.04
6624A Modification Recommended 6624A-12 Defective Cable 2000.04.30
6624A Modification Recommended 6624A-13 Intermittent Power Transformer “Magmate” Connections 2002.09.04
6625A Modification Recommended 6625A-02 Rec replacement of fuses improves performance 1993.01.31
6625A Modification Recommended 6625A-10 Defective Cable 2000.04.30
6625A Modification Recommended 6625A-11 Intermittent Power Transformer “Magmate” Connections 2002.09.04
6626A Modification Recommended 6626A-02 Rec replacement of fuses improves performance 1993.01.31
6626A Modification Recommended 6626A-10 Defective Cable 2000.04.30
6626A Modification Recommended 6626A-11 Intermittent Power Transformer “Magmate” Connections 2002.09.04
6627A Modification Recommended 6627A-06 Defective Cable 2000.04.30
6627A Modification Recommended 6627A-07 Intermittent Power Transformer “Magmate” Connections 2002.09.04
6628A Modification Recommended 6628A-02 Rec replacement of fuses improves performance 1993.01.31
6628A Modification Recommended 6628A-10 Defective Cable 2000.04.30
6628A Modification Recommended 6628A-11 Intermittent Power Transformer “Magmate” Connections 2002.09.03
6629A Modification Recommended 6629A-02 Rec replacement of fuses improves performance 1993.01.31
6629A Modification Recommended 6629A-10 Defective Cable 2000.04.30
6629A Modification Recommended 6629A-11 Intermittent Power Transformer “Magmate” Connections 2002.09.04
6631B Modification Recommended 6631B-02A Blank Front Panel Display,Unit Dead 1999.08.09
6631B Modification Recommended 6631B-05B Unit Exchange Program 2001.01.31
6631B Modification Recommended 6631B-08 On faster computers, when programming over GPIB, a random error will occur. 2005.09.28
6632B Modification Recommended 6632B-01 Low range current readback out of specifications 1998.03.01
6632B Modification Recommended 6632B-02 High current readback accuracy out of specification 1998.10.13
6632B Modification Recommended 6632B-03A Blank Front Panel Display,Unit Dead 1999.08.09
6632B Modification Recommended 6632B-05B Unit Exchange Program 2001.01.31
6632B Modification Recommended 6632B-08 On faster computers, when programming over GPIB, a random error will occur. 2005.09.28
6632B Modification Recommended 6632B-09 There is a possible glitch on the output due to an AC Line sag between 23 VAC to 27 VAC. 2011.01.10
6632B Modification Recommended 6632B-020-01B Unit exchange program 2001.05.22
6632B Modification Recommended 6632B-020-01B Unit Exchange Program 2001.01.31
6632B Modification Recommended 6632B-760-01B Unit exchange program 2001.05.22
6632B Modification Recommended 6632B-760-01B Unit Exchange Program 2001.01.31
6633A Modification Available 6633A-02 Bleeder resistor increases RFI filter capacitor discharge rate 1993.12.31
6633B Modification Recommended 6633B-01 Low range current readback out of specifications 1998.03.01
6633B Modification Recommended 6633B-02 High current readback accuracy out of specification 1998.10.13
6633B Modification Recommended 6633B-03A Blank Front Panel Display,Unit Dead 1999.08.09
6633B Modification Recommended 6633B-05B Unit Exchange Program 2001.01.31
6633B Modification Recommended 6633B-08 On faster computers, when programming over GPIB, a random error will occur. 2005.09.28
6633B Modification Recommended 6633B-09 There is a possible glitch on the output due to an AC Line sag between 23 VAC to 27 VAC. 2011.01.10
6633B Modification Recommended 6633B-020-01B Unit exchange program 2001.05.22
6633B Modification Recommended 6633B-760-01B Unit exchange program 2001.05.22
6634B Modification Recommended 6634B-01 Low range current readback out of specifications 1998.03.01
6634B Modification Recommended 6634B-02 High current readback accuracy out of specification 1998.10.13
6634B Modification Recommended 6634B-03A Blank Front Panel Display,Unit Dead 1999.08.09
6634B Modification Recommended 6634B-05B Unit Exchange Program 2001.01.31
6634B Modification Recommended 6634B-08 On faster computers, when programming over GPIB, a random error will occur. 2005.09.28
6634B Modification Recommended 6634B-09 There is a possible glitch on the output due to an AC Line sag between 23 VAC to 27 VAC. 2011.01.10
6634B Modification Recommended 6634B-020-01B Unit exchange program 2001.05.22
6634B Modification Recommended 6634B-020-01B Unit Exchange Program 2001.01.31
6634B Modification Recommended 6634B-760-01B Unit Exchange Program 2001.01.31
6634B Modification Recommended 6634B-760-01B Unit exchange program 2001.05.22
6634B Modification Recommended 6634B-RECALL-10 Calibrations performed on some Power Supplies by Agilent Technologies between July 1st, 2011 and July 31st, 2012 show a FALSE PASS in either one or more of the 4 tests: CC LOAD EFFECT, CV LOAD EFFECT, CC SOURCE EFFECT or CV SOURCE EFFECT. 2012.08.19
6641A Modification Recommended 6641A-01B Modification corrects relay link and eliminates error -240 1993.11.24
6641A Modification Recommended 6641A-03A Intermittent Phone Cables 2001.02.01
6641A Modification Recommended 6641A-07 6641A exhibited out of specification values for 3.8V to 4.2V at front panel read back readings. 2016.10.27
6642A Modification Recommended 6642A-01B Modification corrects relay link and eliminates error -240 1993.11.24
6642A Modification Recommended 6642A-03A Intermittent Phone Cables 2001.02.01
6642A Modification Recommended 6642A-07 6642A exhibited out of specification values for 9.0V to 10.5V at front panel read back readings. 2016.10.27
6643A Modification Recommended 6643A-01B Modification corrects relay link and eliminates error -240 1993.11.24
6643A Modification Recommended 6643A-03A Intermittent Phone Cables 2001.02.01
6643A Modification Recommended 6643A-07 6643A exhibited out of specification values for 17.5V to 17.9V at front panel read back readings. 2016.10.27
6644A Modification Recommended 6644A-01B Modification corrects relay link and eliminates error -240 1993.11.24
6644A Modification Recommended 6644A-03A Intermittent Phone Cables 2001.02.01
6644A Modification Recommended 6644A-07 6644A exhibited out of specification values for 30.0V to 30.8V at front panel read back readings. 2016.10.27
6645A Modification Recommended 6645A-01B Modification corrects relay link and eliminates error -240 1993.11.24
6645A Modification Recommended 6645A-02A Capacitor C418 may fail 2002.05.04
6645A Modification Recommended 6645A-04A Intermittent Phone Cables 2001.02.01
6645A Modification Recommended 6645A-08 6645A exhibited out of specification values for 61.0V to 61.7V at front panel read back 2016.10.27
6651A Modification Recommended 6651A-02B Modification corrects relay link and eliminates error -240 1993.11.24
6651A Modification Recommended 6651A-05 Intermittent phone cables 1999.08.26
6651A Safety 6651A-10A-S Regulatory noncompliance with the option 901 (Power cord for Australia / New Zealand) 2017.05.12
6651A Modification Recommended 6651A-11 6651A exhibited out of specification values for 3.8V to 4.2V at front panel read back readings. 2016.10.27
6651A Modification Recommended 6651A-RECALL-09 Calibrations performed on some Power Supplies by Agilent Technologies between July 1st, 2011 and July 31st, 2012 show a FALSE PASS in either one or more of the 4 tests: CC LOAD EFFECT, CV LOAD EFFECT, CC SOURCE EFFECT or CV SOURCE EFFECT. 2012.08.20
6652A Modification Recommended 6652A-02B Modification corrects relay link and eliminates error -240 1993.11.24
6652A Modification Recommended 6652A-05 Intermittent Phone Cables 1999.08.01
6652A Safety 6652A-09A-S Regulatory noncompliance with the option 901 (Power cord for Australia / New Zealand) 2017.05.12
6653A Modification Recommended 6653A-02B Modification corrects relay link and eliminates error -240 1993.11.24
6653A Modification Recommended 6653A-05 Intermittent Phone Cables 1999.08.01
6653A Modification Recommended 6653A-07 Bridge Rectifier Failure 1999.12.01
6653A Modification Recommended 6653A-08 Cannot Perform Current Calibration / Alignment 2002.05.31
6653A Safety 6653A-11A-S Regulatory noncompliance with the option 901 (Power cord for Australia / New Zealand) 2017.05.12
6653A Modification Recommended 6653A-12 6653A exhibited out of specification values for 17.0V to 18.5V at front panel read back 2016.10.27
6654A Modification Recommended 6654A-02B Modification corrects relay link and eliminates error -240 1993.11.24
6654A Modification Recommended 6654A-05 Intermittent Phone Cables 1999.08.01
6654A Safety 6654A-09A-S Regulatory noncompliance with the option 901 (Power cord for Australia / New Zealand) 2017.05.12
6654A Modification Recommended 6654A-10 6654A exhibited out of specification values for 30.0V to 31.0V at front panel read back readings. 2016.10.27
6655A Modification Recommended 6655A-02B Modification corrects relay link and eliminates error -240 1993.11.24
6655A Information Only 6655A-03 Modification to reduce Radiated RFI when replacing A2 GPIB board. 1993.11.30
6655A Information Only 6655A-04 Keypad board, Optical Encoders and Knobs have been changed and are not interchangeable with old parts 1997-03
6655A Modification Recommended 6655A-05 Intermittent Phone Cables 1999.08.01
6655A Information Only 6655A-06B Front Panel Parts List 2002.06.28
6655A Modification Recommended 6655A-07 Capacitor Change to Improve Performance 2000.10.25
6655A Modification Recommended 6655A-08 Zero ohm resistor breakdown 2001.05.23
6655A Safety 6655A-11 Regulatory noncompliance with the option 901 (Power cord for Australia / New Zealand) 2016.06.09
6655A Modification Recommended 6655A-12 6655A exhibited out of specification values for 61.0V to 61.6V at front panel read back 2016.10.27
6655A Modification Recommended 6655A-RECALL-11 Calibrations performed on some Power Supplies by Agilent Technologies between July 1st, 2011 and July 31st, 2012 show a FALSE PASS in either one or more of the 4 tests: CC LOAD EFFECT, CV LOAD EFFECT, CC SOURCE EFFECT or CV SOURCE EFFECT. 2012.08.20
6671A Modification Recommended 6671A-01B Modification corrects relay link and eliminates error -240 1993.11.23
6671A Modification Recommended 6671A-02 Mod prevents Error -240 when conn to HP 59510A/11A Relay Box 1994.07.06
6671A Modification Recommended 6671A-05 Intermittent Phone Cables 1999.07.31
6671A Modification Recommended 6671A-08A Upgrade for Unstable Current Shunt ""R907"" CC mode Operation 2003.10.16
6671A Modification Recommended 6671A-10 The four filter capacitors circuit reference (C416-C419) on the A4 AC input board starts leaking electrolyte 2009.08.18
6671A Modification Recommended 6671A-11 The AC INPUT SAFETY COVER has a strain relief used to secure the AC line cord that may become loose. 2009.10.08
6671A Modification Recommended 6671A-13 6671A exhibited out of specification values for 3.5V to 4.0V at front panel read back readings 2016.10.26
6672A Modification Recommended 6672A-01B Modification corrects relay link and eliminates error -240 1993.11.23
6672A Modification Recommended 6672A-02 Mod prevents Error -240 when conn to HP 59510A/11A Relay Box 1994.07.06
6672A Modification Recommended 6672A-05 Intermittent Phone Cables 1999.07.31
6672A Modification Recommended 6672A-07A Upgrade for Unstable Current Shunt ""R907"" 2003.10.16
6672A Modification Recommended 6672A-08 Slow or No Down Programming capability 2006.07.30
6672A Modification Recommended 6672A-10 The four filter capacitors circuit reference (C416-C419) on the A4 AC input board starts leaking electrolyte 2009.08.18
6672A Modification Recommended 6672A-11 The AC INPUT SAFETY COVER has a strain relief used to secure the AC line cord that may become loose. 2009.10.08
6672A Modification Recommended 6672A-13 6672A exhibited out of specification values for 8.5V to 9.5V at front panel read back readings. 2016.10.26
6673A Modification Recommended 6673A-01B Modification corrects relay link and eliminates error -240 1993.11.23
6673A Modification Recommended 6673A-02 Mod prevents Error -240 when conn to HP 59510A/11A Relay Box 1994.07.06
6673A Modification Recommended 6673A-05 Intermittent Phone Cables 1999.07.31
6673A Modification Recommended 6673A-07A Upgrade for ""Unstable"" Current Shunt ""R907"". 2003.10.20
6673A Modification Recommended 6673A-09 The four filter capacitors circuit reference (C416-C419) on the A4 AC input board starts leaking electrolyte 2009.08.18
6673A Modification Recommended 6673A-10 The AC INPUT SAFETY COVER has a strain relief used to secure the AC line cord that may become loose. 2009.10.08
6673A Modification Recommended 6673A-12 6673A exhibited out of specification values for 14.5V to 16V and 26V to 27V at front panel read back readings 2016.10.26
6674A Modification Recommended 6674A-01B Modification corrects relay link and eliminates error -240 1993.11.23
6674A Modification Recommended 6674A-02 Mod prevents Error -240 when conn to HP 59510A/11A Relay Box 1994.07.06
6674A Modification Recommended 6674A-05 Improper Crimps on Output Transformer & Choke 1999.04.05
6674A Modification Recommended 6674A-06 Intermittent Phone Cables 1999.07.31
6674A Modification Recommended 6674A-09A Upgrade for ""Unstable"" Current shunt ""R907"". 2003.10.20
6674A Modification Recommended 6674A-11 The four filter capacitors circuit reference (C416-C419) on the A4 AC input board starts leaking electrolyte 2009.08.18
6674A Modification Recommended 6674A-12 The AC INPUT SAFETY COVER has a strain relief used to secure the AC line cord that may become loose. 2009.10.08
6674A Modification Recommended 6674A-14 6674A exhibited out of specification values for 24V to 28V and 44V to 46V at front panel read back readings. 2016.10.26
6675A Modification Recommended 6675A-01B Modification corrects relay link and eliminates error -240 1993.11.23
6675A Modification Recommended 6675A-02 Modification improves reliability of sense protection resistors 1993.01.31
6675A Modification Recommended 6675A-03 Mod prevents Error -240 when conn to HP 59510A/11A Relay Box 1994.07.06
6675A Modification Recommended 6675A-06 Improper Crimps on Output Transformer & Choke 1999.02.28
6675A Modification Recommended 6675A-07 Intermittent phone cables 1999.08.25
6675A Modification Recommended 6675A-09A Upgrade for ""Unstable"" Current Shunt ""R907"". 2003.10.20
6675A Modification Recommended 6675A-11 The four filter capacitors circuit reference (C416-C419) on the A4 AC input board starts leaking electrolyte 2009.08.18
6675A Modification Recommended 6675A-12 The AC INPUT SAFETY COVER has a strain relief used to secure the AC line cord that may become loose. 2009.10.08
6675A Modification Recommended 6675A-14 6675A exhibited out of specification values for 48V to 52V at front panel read back readings. 2016.10.26
6680A Modification Recommended 6680A-03 Intermittent Phone Cables 1999.08.31
6680A Modification Recommended 6680A-04 A9 Down Programmer Failures 2000.05.02
6680A Modification Recommended 6680A-05 Incorrect response to a query over GPIB 2001.02.12
6680A Modification Recommended 6680A-08 Shunt Resistor R900 has poor fast-on's. 2004.02.24
6681A Modification Recommended 6681A-03 Intermittent Phone Cables 1999.08.31
6681A Modification Recommended 6681A-04 A9 Down Programmer Failures 2000.05.02
6681A Modification Recommended 6681A-05 Incorrect response to a query over GPIB 2001.02.12
6681A Modification Recommended 6681A-08 Shunt Resistor R900 has poor fast-ons 2004.02.24
6682A Modification Recommended 6682A-02 Intermittent Phone Cables 1999.08.31
6682A Modification Recommended 6682A-03 A9 Down Programmer Failures 2000.05.02
6682A Modification Recommended 6682A-04 Incorrect response to a query over GPIB 2001.02.12
6682A Modification Recommended 6682A-07 Shunt Resistor R900 has poor fast-ons 2004.02.24
6683A Modification Recommended 6683A-02 Intermittent Phone Cables 1999.08.31
6683A Modification Recommended 6683A-03 A9 Down Programmer Failures 2000.05.02
6683A Modification Recommended 6683A-04 Incorrect response to a query over GPIB 2001.02.12
6683A Modification Recommended 6683A-07 Shunt Resistor R900 has poor fast-ons 2004.02.24
6684A Modification Recommended 6684A-02 Intermittent Phone Cables 1999.08.31
6684A Modification Recommended 6684A-03 A9 Down Programmer Failures 2000.05.02
6684A Modification Recommended 6684A-04 Incorrect response to a query over GPIB 2001.02.12
6684A Modification Recommended 6684A-07 Shunt resistor R900 has poor fast-ons. 2004.02.24
6690A Modification Recommended 6690A-02 Shunt Resistor R900 has poor fast-ons 2004.02.24
6691A Modification Recommended 6691A-02 Shunt Resistor R900 has poor fast-ons 2004.02.24
6692A Modification Recommended 6692A-02 Shunt Resistor R900 has poor fast-ons 2004.02.24
6692A Modification Recommended 6692A-04 Potential installation fault to users when the AC line cord is connected to the AC fuse holder/line cord module p/n 2110-1312 1899.12.30
6811B Modification Recommended 6811B-03 The tin plating on four PCA connector headers and one cable can potentially oxidize, causing contact resistance to increase. Higher contact resistance will cause a bias voltage on that is present on the connector header to sag. This low voltage can cause the unit to intermittently reset when it is below a certain threshold. 2009.02.19
6811B Safety 6811B-04A-S Regulatory noncompliance with the option 901 (Power cord for Australia / New Zealand) 2017.05.11
6812B Modification Recommended 6812B-03 The tin plating on four PCA connector headers and one cable can potentially oxidize, causing contact resistance to increase. Higher contact resistance will cause a bias voltage on that is present on the connector header to sag. This low voltage can cause the unit to intermittently reset when it is below a certain threshold. 2009.02.19
6812B Modification Recommended 6812B-04 The AC INPUT SAFETY COVER has a strain relief used to secure the AC line cord that may become loose. 2009.10.08
6813B Modification Recommended 6813B-03 Possible intermittent cable assembly 2000.11.02
6813B Modification Recommended 6813B-05 The tin plating on four PCA connector headers and one cable can potentially oxidize, causing contact resistance to increase. Higher contact resistance will cause a bias voltage on that is present on the connector header to sag. This low voltage can cause the unit to intermittently reset when it is below a certain threshold. 2009.02.19
6813B Modification Recommended 6813B-06 The AC INPUT SAFETY COVER has a strain relief used to secure the AC line cord that may become loose. 2009.10.08
6942A Various 06942-90001 6942A Multiprogrammer Service Notes Collection 1987-01
7045B Modification Recommended 7045B-1 IMPROVED X AND V AXIS ATTENUATOR ASSEMBLIES 1981-08
8110A Modification Recommended 8110A-01 Display failures (shifted lines and/or inverted display) 2004.03.09
8114A Modification Recommended 8114A-01A Modify Power Supply to fix problems at line voltage below 130V. 2003.09.07
8114A Modification Recommended 8114A-02B Intermittent display failures 2006.06.28
8164A Modification Recommended 8164A-01 8164A Floppy Drive 1999.08.31
8166A Modification Recommended 8166A-01A Recommended MOV removal in power supply 2001.04.01
8166B Modification Recommended 8166B-01 Potential failure on backplane board 2006.10.17
8169A Modification Recommended 8169A-01B 8169A lockup problem patch and firmware upgrade. 2002.04.28
8340A Modification Available 8340A-22 Rear Panel to Front Panel Retrofit Instructions 1993.01.06
8340A Information Only 8340A-M61A Y2K update information. RMB support software update information. 1998-12
8340A Information Only 8340A-M62A Y2K update information. Microsoft Windows, Win 3.1, Win95 and Win98 software update information. 1998-12
8340A Information Only 8340A-M63A The Pascal operating environment has a defect related to the year 2000. 1998-12
8340B Modification Available 8340B-05 Rear Panel to Front Panel Retrofit Instructions 1993.01.06
8340B Information Only 8340B-M61A Y2K update information. RMB support software update information. 1998-12
8340B Information Only 8340B-M62A Y2K update information. Microsoft Windows, Win 3.1, Win95 and Win98 software update information. 1998-12
8340B Information Only 8340B-M63A The Pascal operating environment has a defect related to the year 2000. 1998-12
8405A Modification Available 8405A-8A Serial Prefix 2014A and Below - “APC UNLOCKED” Indicator Light Replacement 1981-07
8444A Modification Available 8444A-4 HP MODEL8444A OPTION 059 TRACKING GENERATOR Serial Prefix 2103A and Below Except for the Following Serial Numbers 03900,03932,03985,03986,03987, 03991,03992,03995,03996,03997, 04002,04006,04007,04008,04009,04010 - DEGRADED FREQUENCY RESPONSE PERFORMANCE FOR SWEEP TIMES LESS THAN 5 MSEC/DIV 1982-03
8477A Modification Recommended 8477A-01A 8477A not able to power up under 115V 2014.03.18
8481A Modification Recommended 8481A-10 In the Measurement report of 8481A, the Reference Calibration factor at 50MHz stated is inconsistent with the 50MHz Calibration Factor listed in the table. 2016.10.26
8481D Modification Recommended 8481D-02 Cal factor and reflection magnitude uncertainty values on factory calibration report are incoreect. 2001.10.29
8494A Modification Recommended 8494A-01A Step Attenuator knob modification 2001.07.16
8494A Modification Recommended 8494A-02 The identified batch of step attenuator’s rotating knob may become loose when the user applies an extended force to turn the knob beyond the maximum attenuation value. This will cause the attenuation value to be located outside of the indicator window and may create confusion on the actual attenuation value. 2020.11.18
8494B Modification Recommended 8494B-01A Step Attenuator knob modification 2001.07.16
8494B Modification Recommended 8494B-02 The identified batch of step attenuator’s rotating knob may become loose when the user applies an extended force to turn the knob beyond the maximum attenuation value. This will cause the attenuation value to be located outside of the indicator window and may create confusion on the actual attenuation value. 2020.11.19
8495A Modification Recommended 8495A-01A Step Attenuator knob modification 2001.07.16
8495A Modification Recommended 8495A-02 The identified batch of step attenuator’s rotating knob may become loose when the user applies an extended force to turn the knob beyond the maximum attenuation value. This will cause the attenuation value to be located outside of the indicator window and may create confusion on the actual attenuation value. 2020.11.18
8495B Modification Recommended 8495B-01A Step Attenuator knob modification 2001.07.16
8495B Modification Recommended 8495B-02 The identified batch of step attenuator’s rotating knob may become loose when the user applies an extended force to turn the knob beyond the maximum attenuation value. This will cause the attenuation value to be located outside of the indicator window and may create confusion on the actual attenuation value. 2020.11.18
8495D Modification Recommended 8495D-01A Step Attenuator knob modification 2001.07.16
8495D Modification Recommended 8495D-02 The identified batch of step attenuator’s rotating knob may become loose when the user applies an extended force to turn the knob beyond the maximum attenuation value. This will cause the attenuation value to be located outside of the indicator window and may create confusion on the actual attenuation value. 2020.11.18
8496A Modification Recommended 8496A-01A Step Attenuator knob modification 2001.07.16
8496A Modification Recommended 8496A-02 The identified batch of step attenuator’s rotating knob may become loose when the user applies an extended force to turn the knob beyond the maximum attenuation value. This will cause the attenuation value to be located outside of the indicator window and may create confusion on the actual attenuation value. 2020.11.18
8496B Modification Recommended 8496B-01A Step Attenuator knob modification 2001.07.16
8496B Modification Recommended 8496B-02 The identified batch of step attenuator’s rotating knob may become loose when the user applies an extended force to turn the knob beyond the maximum attenuation value. This will cause the attenuation value to be located outside of the indicator window and may create confusion on the actual attenuation value. 2020.11.18
8501A Information Only 8501A-4 ADJUSTMENT PROCEDURE FOR COMPATABILITY WITH THE MODEL 8754A NETWORK ANALYZER 1980-10
8510B Safety 8510B-06A-S Rear panel fan cutout and fan guard allow accessibility of fan blades to an IEC 61010 type test finger. 2007.05.09
8510C Modification Recommended 8510C-01 Floppy disk drive formating information. 1999.10.31
8510C Modification Recommended 8510C-02A 8510C firmware change from C.07.14 to C.07.16 2000.11.30
8510C Safety 8510C-03A-S Rear panel fan cutout and fan guard allow accessibility of fan blades to an IEC 61010 type test finger. 2007.05.09
8510C Modification Recommended 8510C-04 Unreadable softkey labels and syntax errors when using Electronic Calibration Modules (Ecal). 2002.09.22
8511A Modification Recommended 8511A-06 Performance Software 1999.10.31
8511A Safety 8511A-07A-S Rear panel fan cutout and fan guard allow accessibility of fan blades to an IEC 61010 type test finger. 2007.05.09
8511B Modification Recommended 8511B-01 Performance Software 1999.10.31
8511B Safety 8511B-02A-S Rear panel fan cutout and fan guard allow accessibility of fan blades to an IEC 61010 type test finger. 2007.05.09
8514B Modification Recommended 8514B-01 D.C. Return Upgrade Kit 1995.09.30
8514B Safety 8514B-05A-S Rear panel fan cutout and fan guard allow accessibility of fan blades to an IEC 61010 type test finger. 2007.05.09
8515A Modification Recommended 8515A-04 D.C. Return Upgrade Kit 1995.09.30
8515A Safety 8515A-06A-S Rear panel fan cutout and fan guard allow accessibility of fan blades to an IEC 61010 type test finger. 2007.05.09
8517A Safety 8517A-03A-S Rear panel fan cutout and fan guard allow accessibility of fan blades to an IEC 61010 type test finger. 2007.05.09
8517B Modification Recommended 8517B-01 D.C. Return Upgrade Kit 1995.09.30
8517B Modification Recommended 8517B-02 Test Set Option 002 deletion 1996.12.31
8517B Safety 8517B-03A-S Rear panel fan cutout and fan guard allow accessibility of fan blades to an IEC 61010 type test finger. 2007.05.09
8530A Modification Recommended 8530A-01 Overspeed error when 85370A is used, or no display on 85370A 1998.07.31
8555A Modification Recommended 8555A-1 HP MODEL 8555A SPECTRUM ANALYZER, RF SECTION, Serials Prefixed 1232A and Below PRESELECTOR DPM MODIFICATION unknown
8558B Modification Recommended 8558B-1 BANDWIDTH FILTER BOARD REP4ACEMENT 1974-01
8558B Modification Recommended 8558B-2 Serials Prefixed 1321 A and Below – IMPROVED FREQUENCY TUNING POT 1974-01
8558B Modification Recommended 8558B-3 Serials Prefixed 1334A and Below – PREVENTION OF SINGLE SWEEP TRIGGERING BY ERASE FUNCTION TRANSIENTS 1974-02
8558B Modification Recommended 8558B-4 Serials Prefixed 1334A and Below – NEW FRONT PANEL LATCH HOUSING 1974-02
8560E Priority Safety 8560E-18-S Possible Shoulder Strap Failure Under Load 1998.07.31
8560EC Modification Recommended 8560EC-02 Possible 60 Hz related sidebands 2001.07.16
8560EC Modification Recommended 8560EC-04 A butch on the A5 IF board to possible remove error messages 561, 562, and 565 2002.02.07
8560EC Modification Recommended 8560EC-05 Replace A2 board to remove spikes on falling edges of a square pulse 2002.02.07
8560EC Modification Recommended 8560EC-08 Unstable Noise Floor and/or 500 series Error Messages 2006.03.26
8560EC Modification Recommended 8560EC-12-RECALL Calibrations performed on some Spectrum Analyzers by Agilent Technologies between January 01, 2010 and 02 February 2012 show a false pass in the test summary for the frequency response band 0 test. 2012.03.13
8561B Modification Recommended 8561B-16 Modification prevents possible damage to video out buffer on A2 interface 1993.02.28
8561E Priority Safety 8561E-14-S Possible Shoulder Strap Failure Under Load 1998.07.31
8561EC Modification Recommended 8561EC-09-RECALL Calibrations performed on some Spectrum Analyzers by Agilent Technologies between January 01, 2010 and 02 February 2012 show a false pass in the test summary for the frequency response band 0 test. 2012.03.13
8562E Priority Safety 8562E-06-S Possible Shoulder Strap Failure Under Load 1998.07.31
8562EC Modification Recommended 8562EC-03 Possible 60 Hz related sidebands 2001.07.16
8562EC Modification Recommended 8562EC-04 A butch on the A5 IF board to possible remove error messages 561, 562, and 565 2002.02.07
8562EC Modification Recommended 8562EC-05 Replace A2 board to remove spikes on falling edges of a square pulse 2002.02.07
8562EC Modification Recommended 8562EC-08 Unstable Noise Floor and/or 500 series Error Messages 2006.03.26
8563E Modification Recommended 8563E-26-RECALL Calibrations performed on some Spectrum Analyzers by Agilent Technologies between January 01, 2010 and 02 February 2012 show a false pass in the test summary for the frequency response band 0 test. 2012.03.13
8563E Information Only 8563E-25 New A15 RF Board Replacement Part Numbers 2004.12.20
8563E Modification Recommended 8563E-24A Possible Failure of A6A1 High Voltage Module 1999-03
8563E Information Only 8563E-23 A1A2 RPG Assembly and A1 Keyboard Part Number Change 1999-01
8563E Modification Recommended 8563E-22 A15 Assembly Shield Can Load Down Supply 1999-05
8563E Modification Available 8563E-21 12.4 GHz Signal on 310.7 MHz IF Output 1999.02.17
8563E Modification Recommended 8563E-19C Year 2K Update Information 1999.01.20
8563E Priority Safety 8563E-18-S Possible Shoulder Strap Failure Under Load 1998.07.31
8563E Modification Recommended 8563E-17 Reducing 300 kHz Sidebands 1997-12
8563E Modification Recommended 8563E-16 Intermittent Error 337 (Frac-N Unlock) Under Certain Conditions 1997-07
8563E Modification Recommended 8563E-15 Intermittent Error 335 Sampler Unlock 1997-03
8563E Modification Recommended 8563E-14 A17 CRT Driver Reliability Improvement 1996-10
8563E Modification Recommended 8563E-13 Intermittent flashing display intensity 1996-01
8563E Information Only 8563E-12 VCO adjustment for later “1X6” A15 RF assemblies 1996-01
8563E Modification Recommended 8563E-10C Possible Frequency Response Drift 2000-06
8563E Modification Recommended 8563E-10D Possible Frequency Response Drift 2003.11.11
8563E Modification Recommended 8563E-09 High displayed average noise level in wide bandwidths 1994-05
8563E Modification Recommended 8563E-08 5-Volt Regulator Reliability Improvement on A6 1993.11.24
8563E Modification Available 8563E-07A Modification to improve focus reliability 1996-08
8563E Modification Available 8563E-06 I.F. errors falsely displayed at cold temperatures before OCXO is warmed up 1993.09.08
8563E Modification Available 8563E-04L Firmware Upgrade Kit and Information 1999-11
8563E Modification Recommended 8563E-02C Defective 5-volt regulators on A6 power supply and A14 frequency control assemblies 1994.01.10
8563E Modification Recommended 8563E-01A Modification for Intermittent sampler unlock errors 1993.02.05
8563E Information Only 8563E-M62A Y2K update information. Microsoft Windows, Win 3.1, Win95 and Win98 software update information. 1998-12
8563E Information Only 8563E-M63A The Pascal operating environment has a defect related to the year 2000. 1998-12
8563E Modification Recommended 8563E-M71 Tightening torque on p/n 08673-60040 APC 3.5mm(m)to(f) connector. 1999-02
8563EC Modification Recommended 8563EC-02 Possible Frequency Response Drift 2000-06
8563EC Modification Recommended 8563EC-02B Possible Frequency Response Drift 2003.11.11
8563EC Modification Recommended 8563EC-03 Possible 60 Hz related sidebands 2001.07.16
8563EC Modification Recommended 8563EC-04 A butch on the A5 IF board to possible remove error messages 561, 562, and 565 2002.02.07
8563EC Modification Recommended 8563EC-05 Replace A2 board to remove spikes on falling edges of a square pulse 2002.02.07
8563EC Modification Recommended 8563EC-06 Perform butch on A3 interface board to remove gated video problems 2002.03.13
8563EC Information Only 8563EC-07 New A15 RF Board Replacement Part Numbers 2004.12.20
8563EC Modification Recommended 8563EC-08 Unstable Noise Floor and/or 500 series Error Messages 2006.03.26
8563EC Modification Recommended 8563EC-11-RECALL Calibrations performed on some Spectrum Analyzers by Agilent Technologies between January 01, 2010 and 02 February 2012 show a false pass in the test summary for the frequency response band 0 test. 2012.03.15
8563ER Modification Recommended 8563ER-19C Year 2K Update Information 1999.01.20
8563ER Information Only 8563ER-M61A Y2K update information. RMB support software update information. 1998-12
8563ER Information Only 8563ER-M62A Y2K update information. Microsoft Windows, Win 3.1, Win95 and Win98 software update information. 1998-12
8563ER Information Only 8563ER-M63A The Pascal operating environment has a defect related to the year 2000. 1998-12
8564E Priority Safety 8564E-12-S Possible Shoulder Strap Failure Under Load 1998.07.31
8564EC Modification Recommended 8564EC-03 Possible 60 Hz related sidebands 2001.07.16
8564EC Modification Recommended 8564EC-04 A butch on the A5 IF board to possible remove error messages 561, 562, and 565 2002.02.07
8564EC Modification Recommended 8564EC-05 Replace A2 board to remove spikes on falling edges of a square pulse 2002.02.07
8564EC Modification Recommended 8564EC-08 Unstable Noise Floor and/or 500 series Error Messages 2006.03.26
8565A Modification Recommended 8565A-7 Serials Prefixed 2027 A and Below – THIRD CONVERTER ASSEMBL V REPLACEMENT KIT 1981-06
8565A Modification Recommended 8565A-10 IMPROVED FREQUENCY RESPONSE PERFORMANCE TEST 1981-04
8565A Modification Recommended 8565A-11 FUSED 30V POWER SUPPLY 1981-06
8565E Priority Safety 8565E-12-S Possible Shoulder Strap Failure Under Load 1998.07.31
8565EC Modification Recommended 8565EC-02B Possible Frequency Response Drift 2003.11.11
8565EC Modification Recommended 8565EC-03 Possible 60 Hz related sidebands 2001.07.16
8565EC Modification Recommended 8565EC-04 A butch on the A5 IF board to possible remove error messages 561, 562, and 565 2002.02.07
8565EC Modification Recommended 8565EC-05 Replace A2 board to remove spikes on falling edges of a square pulse 2002.02.07
8565EC Modification Recommended 8565EC-06 Perform butch on A3 interface board to remove gated video problems 2002.03.13
8565EC Information Only 8565EC-07 New A15 RF Board Replacement Part Numbers 2004.12.20
8565EC Modification Recommended 8565EC-08 Unstable Noise Floor and/or 500 series Error Messages 2006.03.26
8565EC Modification Recommended 8565EC-11-RECALL Calibrations performed on some Spectrum Analyzers by Agilent Technologies between January 01, 2010 and 02 February 2012 show a false pass in the test summary for the frequency response band 0 test. 2012.03.13
8566A Modification Recommended 8566A-7 IF Section Serial Prefix 1928A and Below – MODIFICATION TO IMPROVE MAGNETIC SUSCEPTIBILITY OF DISPLAY 1980-02
8566A Modification Recommended 8566A-15 FIELD INSTALLATlON OF OPTION 650 1981-05
8566A Modification Recommended 8566A-16 RF ATTENUATOR WITH CALIBRATION ROM REPLACEMENT 1981-05
8566A Information Only 8566A-1981 8566A and 8568A FAN FILTERS 1981-04
8566B Information Only 8566B-01 Rack Mounting with Slides (Option 010); English System II Cabinet Parts 1985-05
8566B Information Only 8566B-02 Rack Mounting with Slides (Option 010); Metric System II Cabinet Parts 1985-05
8566B Information Only 8566B-05 Repair and replacement of A5A2 Rotary Pulse Generator 1992.12.09
8566B Information Only 8566B-10B Option 462 6 dB resolution bandwidths 1993.12.21
8566B Modification Available 8566B-11B A15 Controller Assembly Firmware Replacement Kit 1989.11.13
8566B Information Only 8566B-12A Installation Procedure for Rebuilt A15 Controller Assembly 1987-08
8566B Modification Recommended 8566B-19 Replacement RF Attenuator Retrofit Kit with Calibration PROM 1987-11
8566B Modification Available 8566B-19A RF Attenuator with Calibration ROM Replacement 1993.03.02
8566B Modification Recommended 8566B-20 Misloaded Capacitor Exposed to 130% of Its Rating 1990.05.25
8566B Modification Recommended 8566B-33 Oven Oscillator Thermal Fuse Failure 1990.04.10
8566B Information Only 8566B-37 New A4A1 Video Processor 1991.12.04
8566B Modification Recommended 8566B-39 Intermittent PC Edge Connectors on A4A4 Bandwidth Filter Assembly 1993.02.20
8566B Information Only 8566B-40 Spurious Responses in Low Band 1997-07
8566B Information Only 8566B-41 Recommended replacement for A10A6U2 OP AMP 1994-10
8566B Information Only 8566B-42 RF Section Fan Motor Replacement 1996-01
8567A Modification Recommended 8567A-04 Misloaded Capacitor Exposed to 130% of Its Rating 1990.05.25
8567A Modification Recommended 8567A-11A Frequency Spur Correction 1989.12.21
8568A Information Only 8568A-1-82 KEYBOARD SWITCH FAILURES (FLYING SPRING SYNDROME) 1982-02
8568A Modification Recommended 8568A-20 IF Section Serial Prefix 1928A and Below – MODIFICATION TO IMPROVE MAGNETIC SUSCEPTIBILITY OF DISPLAY 1980-02
8568A Information Only 8568A-25 USING THE 8444A TRACKING GENERATOR – WITH THE 8568A SPECTRUM ANALYZER 1980-03
8568A Modification Recommended 8568A-28 IF Section Serial Prefix 2005A and Below; RF Section Serial Prefix 1921A and Below – 3 MHz RESOLUTION BANDWIDTH 1980-03
8568A Modification Recommended 8568A-37 All Serial Prefixes – RF ATTENUATOR WITH CALIBRATION ROM REPLACEMENT 1980-08
8568A Modification Recommended 8568A-46A Frequency Spur Correction 1989.12.21
8568A Information Only 8568A-1981 8566A and 8568A FAN FILTERS 1981-04
8568B Information Only 8568B-01 Rack Mounting with Slides (Option 010); English System II Cabinet Parts 1985-05
8568B Information Only 8568B-02 Rack Mounting with Slides (Option 010); Metric System II Cabinet Parts 1985-05
8568B Modification Recommended 8568B-04A Frequency Spur Correction 1989.12.21
8568B Information Only 8568B-10B Option 462 6dB Resolution Bandwidths 1993.12.21
8568B Modification Available 8568B-11B A15 Controller Assembly Firmware Replacement Kit 1989.11.13
8568B Information Only 8568B-12A Installation Procedure for Rebuilt A15 Controller Assembly 1987-08
8568B Modification Recommended 8568B-14 Misloaded Capacitor Exposed to 130% of Its Rating 1990.05.25
8568B Modification Available 8568B-21 LO Amplifier Replacement Kit 1989.12.06
8568B Information Only 8568B-25 New Cooling Fans for the 8568B Spectrum Analyzer 1991.09.26
8568B Modification Recommended 8568B-27 Oven Oscillator Thermal Fuse Failure 1990.04.10
8568B Modification Recommended 8568B-28 Surface-Acoustic-Wave Resonator Failures 1990.04.12
8568B Information Only 8568B-31 New A4A1 Video Processor 1990.12.04
8568B Information Only 8568B-35 RF Section Fan Motor Replacement 1996-01
8568B Information Only 8568B-41 Recommended replacement for A10A6U2 OP AMP 1994-04
8590L Priority Safety 8590L-09-S Possible Shoulder Strap Failure Under Load 1998.07.31
8591E Priority Safety 8591E-14-S Possible Shoulder Strap Failure Under Load 1998.07.31
8592L Priority Safety 8592L-07-S Possible Shoulder Strap Failure Under Load 1998.07.31
8593E Priority Safety 8593E-15-S Possible Shoulder Strap Failure Under Load 1998.07.31
8594E Priority Safety 8594E-14-S Possible Shoulder Strap Failure Under Load 1998.07.31
8595E Priority Safety 8595E-14-S Possible Shoulder Strap Failure Under Load 1998.07.31
8596E Priority Safety 8596E-14-S Possible Shoulder Strap Failure Under Load 1998.07.31
8620A Modification Required 8620A-6B Modification Required for Compatibility with 86290A, 2.0-18.0 Ghz RF Plug-In or 8410B Network Analyzer 1975-04
8620B Modification Required 8620B-3 Modification Required for 86290A 2.0-18.0 GHz Plug-In Compatibility 1974-09
8642M Modification Recommended 8642M-03A Procedure to Resolve A11 and A12 Module Failures 1992.07.10
8648A Modification Recommended 8648A-01A Firmware defect repair for 8648A opt 1EP 2009.05.04
8648A Modification Recommended 8648A-02B Procedure to replace defective 864X display module 2009.10.21
8648B Modification Recommended 8648B-02B Procedure to replace defective 864X display module 2009.10.21
8648C Modification Recommended 8648C-02B Procedure to replace defective 864X display module 2009.10.21
8648D Modification Recommended 8648D-02B Procedure to replace defective 864X display module 2009.10.21
8654A Modification Recommended P-08654-60047 Serial Prefix 1530A and Below MICROPHONICS REDUCTION KIT 1975-12
8654B Information Only 8654B-1 IMPROVED PERFORMANCE TESTS AND ADJUSTMENTS USING THE 8901A 1980-12
8656A Modification Recommended 8656A-10A Serials Prefixed 2124A and Below – MODIFICATION to CORRECT for SPURIOUS SIDEBANDS 60·110 MHz VCO 1981-09
8662A Modification Recommended 8662A-12E Modification Kit to correct Error 03/04 conditions. 1992.04.07
8662A Modification Recommended 8662A-17A Synthesised Signal Generator VCO (08662-60485) failures 1998-08
8662A Modification Recommended 8662A-18 Procedure to resolve A7A4 (08662-60376) C2 and C3 leakage 1999-03
8662A Modification Recommended 8662A-19 Procedure to resolve 2-4 MHz spurs out from 640-1280 MHz carrier 1999-07
8662A Modification Recommended 8662A-20 Procedure to resolve 230V misprinted fuse rating on fuse plate. 2000-03
8662A Modification Recommended 8662A-21 Procedure to resolve A7A3C10 polarity misprinted. 2000-09
8663A Modification Recommended 8663A-06E Modification Kit to correct Error 03/04 conditions. 1992.04.03
8663A Modification Recommended 8663A-11A Synthesised Signal Generator VCO (08662-60485) failures 1998-08
8663A Modification Recommended 8663A-13 Procedure to resolve 2-4 MHz spurs out from 640-1280 MHz carrier 1999-07
8663A Modification Recommended 8663A-14 Procedure to resolve 230V misprinted fuse rating on fuse plate. 2000-03
8663A Modification Recommended 8663A-15 Procedure to resolve A7A3C10 polarity misprinted. 2000-09
8690A Modification Recommended 8690A-1 RECOMMENDED REPLACEMENT FOR A3V5 1967-03
8690A Modification Recommended 8690A-2A RECIPROCAL AMPLIFIER IMPROVEMENTS 1969-03
8690A Modification Recommended 8690A-3 RECOMMENDED REPLACEMENT TRANSISTOR 1967-09
8690A Modification Recommended 8690A-4 REPLACEMENT PUSHBUTTONS 1967-09
8690A Modification Recommended 8690A-5 FAN NOISE REDUCTION 1967-09
8690A Modification Recommended 8690A-6 MODIFICATION FOR USE WITH HP MODEL 8706A AND 8707A 1967-11
8690A Modification Recommended 8690A-7 A modification of the circuit wiring of 8690A Sweep Oscillators, serials below 641-00261, is required for compatibility of these instruments with RF Units with Serial Prefix 724- and above. 1967-11
8690A Modification Recommended 8690A-8 IMPROVED PEN LIFT RELAY KIT 1968-05
8690A Modification Recommended 8690A-9 Improved Power Supply Reliability & Improved Square Wave Symmetry. 1968-06
8690A Modification Recommended 8690A-10 Serials 803-02061 to 818-02430 - MISSING CONNECTION ON A3 RECIPROCAL AMPLIFIER BOARD 1968-03
8690A Modification Recommended 8690A-11 RECOMMENDED REPLACEMENT FOR 8690A: A3V4, A4V1, A4V2, A4V4 8690B: A4V1, A4V2, A4V4 1969-03
8690A Modification Recommended 8690A-12 REPLACEMENT OF CAPACITORS CONTAINING PCB 1973-02
8690A Modification Recommended 8690A-12A REPLACEMENT OF CAPACITORS CONTAINING PCB 1973-05
8690A Modification Recommended 8690A-13 RECOMMENDED REPLACEMENT FOR A8C4 AND A8C5 1974-03
8690A Information Only 8690A-1967 Power Meter Leveling the 8690A Sweep Oscillator 1967-02
8690A Modification Recommended 8690A-670726 Incompatibility with RF Units, Prefix 724- and above 1967.07.26
8690A Modification Recommended P-08690-6029 HELIX AMPLIFIER MODIFICATION KIT 1971-11
8690A Modification Recommended P-08690-6029-67 HELIX AMPLIFIER MODIFICATION KIT 1967-10
8690A Modification Recommended P-08690-6043 Serials Below 803-2061 Improved +27 5 V /-300 V Power Supplies 1968-04
8690A/B Modification Recommended 8690A-1968 Power Meter Leveling HP Model 8690A/B Sweep Oscillators 1968.12.31
8690A/B Modification Recommended P-08690-60053 HIGH VOLTAGE POWER SUPPLY BOARD ASSEMBLY - IMPROVED TIME DELAY CIRCUIT 1971-12
8690A/B Modification Recommended P-9100-2882 IMPROVE RESIDUAL FM WITH NEW REPLACEMENT POWER TRANSFORMER 1970-01
8690B Modification Recommended 8690B-1 Serials 803-02061 to 818-02430 - MISSING CONNECTION ON A3 RECIPROCAL AMPLIFIER BOARD 1968-03
8690B Safety 8690B-1-70 POSSIBLE SAFETY HAZARD. 1970-08
8690B Modification Recommended 8690B-2 RECOMMENDED REPLACEMENT FOR 8690A: A3V4, A4V1, A4V2, A4V4 8690B: A4V1, A4V2, A4V4 1969-03
8690B Modification Recommended 8690B-3 TIGHTEN 8690B VOLTAGE ADJUSTMENT TOLERANCES 1969-12
8690B Modification Recommended 8690B-4 RECOMMENDED REPLACEMENTS for TRANSISTOR A1403 AND RESISTOR A3R63 1970-01
8690B Modification Recommended 8690B-5 MODIFICATION TO IMPROVE LINE SYNC TRIGGERING 1971-03
8690B Modification Recommended 8690B-6 MODIFICATIONS TO IMPROVE RELIABILITY 1972-01
8690B Modification Recommended 8690B-7 REPLACEMENT OF CAPACITORS CONTAINING PCB 1973-02
8690B Modification Recommended 8690B-8 RECOMMENDED REPLACEMENT FOR A8R14 1974-03
8690B Modification Recommended 8690B-9 RECOMMENDED REPLACEMENT FOR A8C4 and A8C5 1974-03
8690B Modification Recommended 8690B-U-3 TIGHTEN 8690B VOLTAGE ADJUSTMENT TOLERANCES 1970-02
8698B Modification Recommended 8698B-1 TIGHTEN 8690B VOLTAGE ADJUSTMENT TOLERANCES 1969-12
8699B Modification Recommended 8699B-1 TIGHTEN 8690B VOLTAGE ADJUSTMENT TOLERANCES 1969-12
8751A Modification Recommended 8751A-17 Modification to fix unexptected spurious problem. 1995.04.15
8751A Modification Recommended 8751A-18 Firmware Upgrade Improves Performance and Corrects Known Problems Described in Table 1 1992.01.30
8753ES Modification Recommended 8753ES-03B Old A10 (8753-60095) board causes points to be dropped from trace, if U28 was manufactured by Fairchild. 2008.06.02
8753ET Modification Recommended 8753ET-01A Old A10 (08753-60095) board causes points to be dropped from trace, 2001.10.31
8757D Modification Recommended 8757D-01 The 8757D logger boards (A7-A10; P/N 08757-60146) have a reference diode that has excessive temperature drift. This drift may cause the dynamic accuracy test (as measured by the 11613A/B) to fail. 2008.08.17
8902A Modification Available 8902A-VAR Service Notes Collection for the 8902A Measuring Receiver 1986-10
8904A Modification Recommended 8904A-04 Replacement of Audio Transformer to Correct Inverted Waveform 1992.01.01
8904A Information Only 8904A-05 8904A Multifunction Synthesizer Procedure For Restoring RAM Data 1993.09.24
8921A Modification Recommended 8921A-01 H/W and F/W upgrade required for 83201A compatibility 1993.06.09
8921A Modification Recommended 8921A-02 Rec mod corrects tone/digital signaling functionality 1993.12.31
8921A Modification Recommended 8921A-03 New F/W A.10.07 corrects erroneous self text diagnostic results 1993.11.23
8921A Modification Recommended 8921A-05 Cooling fan's shield can become loose or fall off 1996.09.12
8922M Safety 8922M-09-S Possible Shock Hazard, return to Agilent for Electrical safety (hi-pot) test, earth continuity test, and dielectric voltage (flash test) 2000.01.31
8922P Safety 8922P-06-S Possible Shock Hazard, return to Agilent for Electrical safety (hi-pot) test, earth continuity test, and dielectric voltage (flash test) 2000.01.31
8922R Safety 8922R-03-S Possible Shock Hazard, return to Agilent for Electrical safety (hi-pot) test, earth continuity test, and dielectric voltage (flash test) 2000.01.31
8922S Safety 8922S-04-S Possible Shock Hazard, return to Agilent for Electrical safety (hi-pot) test, earth continuity test, and dielectric voltage (flash test) 2000.01.31
8922X Safety 8922X-06-S Possible Shock Hazard, return to Agilent for Electrical safety (hi-pot) test, earth continuity test, and dielectric voltage (flash test) 2000.01.31
8922Y Safety 8922Y-03-S Possible Shock Hazard, return to Agilent for Electrical safety (hi-pot) test, earth continuity test, and dielectric voltage (flash test) 2000.01.31
8970B Information Only 8970B-06 New A14 Microprocessor Assembly 1992.08.18
8970B Information Only 8970B-07 Spurious Response and Jitter Specification Changed 1992.08.27
8970B Information Only 8970B-10 New more robust A6 Input Assembly for Option 020 1998-08
8970B Information Only 8970B-11 Change to Input Power Detector Gain and Offset Adjustment Procedure 1999-01
8970B Information Only 8970B-12 Main Differences between Standard 8970B and 8970B Option 020 1999-01
8970B Information Only 8970B-13 Agilent 8970B Noise Figure Meter 2004.05.21
8990B Modification Available 8990B-01 Window XP upgrade to Window 7 2014.05.15
8990B Modification Recommended 8990B-02 Unresponsive knobs on 8990B front panel. 2015.10.20
8990B Modification Recommended 8990B-03 Peak Power Analyzer shuts off for no apparent reason 2017.09.20
10400B Information Only 10400B-01 Special support for 104xxA Probes and their replaceable parts 2001.07.17
10529A Modification Available 10529A-01 Instructions on replacing the A2 main board assembly 1993.03.01
10762B Modification Recommended 10762B-01 Switches S1, S2 and S3 may be subject to early failure 1993.12.31
10887B Modification Recommended 10887B-01 New IC sockets prevent FPGAs from falling out 1994.10.10
10887P Modification Recommended 10887P-01 New IC sockets prevent FPGAs from falling out 1994.10.10
10889B Modification Recommended 10889B-01 Resoldering address switch S2 corrects intermittents 1995.07.27
11713A Modification Recommended 11713A-02 Modification reduces noise susceptibility 1993.12.31
11713B Modification Recommended 11713B-08 11713B Attenuation/Switch Driver could have built with PSU cover (PN 11713-00033) with wrong insulator placement. 2021.01.24
11713C Modification Recommended 11713C-08 11713C Attenuation/Switch Driver could have built with PSU cover (PN 11713-00033) with wrong insulator placement. 2021.01.24
11729C Modification Recommended 11729C-04 Isolator (AT2) Replacement 1993.08.27
16008B Modification Recommended 16008B-02 Rec repl of main electrode if cond elastomer sheet is loose 1994.07.06
16089B Information Only 16089B-01 This service note provides the updated part numbers and figures for both RoHS and non-RoHS 16089B Medium Kelvin Clip Lead 2012.11.19
16092A Modification Available 16092A-01 New metal clips improve contact repeatability 1993.12.12
16092A Modification Recommended 16092A-03 The conductivity of the defective holder (16092-40616) causes the Q measurement abnormally 2013.05.28
16192A Information Only 16192A-02 Repair information on old designed parts 1996.09.13
16192A Information Only 16192A-03A This service note provides the updated part numbers and figures for both RoHS and non-RoHS 16192A Parallel Electrode SMD Test Fixture. 2013.05.07
16197A Modification Recommended 16197A-01 Dimensional distortion of the contact assembly interferes with operations. 2004.06.29
16198A Modification Available 16198A-01 The screws which fix the DUT cover and PC board strip out 2019.01.08
16339A Modification Recommended 16339A-01 Modification to correct a misassembled arm plate in SMD module 1992.07.31
16339A Modification Recommended 16339A-02 New miniature banana-plug cable wire eliminates breakage 1993.05.31
16380C Modification Recommended 16380C-01 Mod prevents potential damage to the carrying case 1993.03.31
16441A Modification Recommended 16441A-01 Mod corrects abnorm measumnts using R-Box & Kelvin-Triax cbls 1994.08.04
16452A Information Only 16452A-02 16452A Connector Part Number change 2023.04.05
16555A Modification Recommended 16555A-02 Mod corrects Master/Expander operation 1995.10.31
16903A Modification Recommended 16903A-01 Upgrades of CPU motherboard, Main Interface Board,(MIB), and PCI board to improve system reliability. 2004.11.02
18281A Modification Recommended 18281A-02 Mod to remove PS3 to prevent network crashes 1993.12.12
18282A Modification Recommended 18282A-01 Exchange board fixes misloaded capacitors 1992.02.29
18283A Modification Recommended 18283A-01 Exchange board fixes misloaded capacitors 1992.02.29
18284A Modification Recommended 18284A-01 Exchange board fixes misloaded capacitors 1992.02.29
33220A Modification Recommended 33220A-01 Updating Firmware may result in Corrupt Memory 2006.08.23
33220A Modification Recommended 33220A-02C Encoder May Be Subject to Early Failure 2012.03.13
33220A Modification Recommended 33220A-03 Flatness Calibration Error 2009.08.06
33220A Modification Recommended 33220A-03 Flatness Calibration Error 2009.08.24
33250A Modification Recommended 33250A-01 Amplitude Flatness May Exceed One-Year Limits in First Year. 2004.07.05
33250A Modification Recommended 33250A-02 Flatness Calibration Error 2009.08.06
33250A Modification Recommended 33250A-03B Internal Clock Reference Calibration Error 2010.09.21
33509B Modification Recommended 33509B-02 Some customers have reported that, when line power is applied to the instrument but the instrument is NOT turned on (“Standby Mode”), some instruments will emit an audible high-pitched whistle or whine. To fix this, the existing power supply must be replaced with a newly designed power supply, as detailed in the solution below. 2017.10.11
33509B Modification Recommended 33509B-03 The dot key on front panel intermittently not active. 2018.08.02
33509B Modification Recommended 33509B-04 The trigger LED does not blink when burst mode is set to on. 2018.10.02
33509B Information Only 33509B-05 LAN connection failure when connected to external switch/hub. 2023.07.26
33510B Modification Recommended 33510B-02 Some customers have reported that, when line power is applied to the instrument but the instrument is NOT turned on (“Standby Mode”), some instruments will emit an audible high-pitched whistle or whine. To fix this, the existing power supply must be replaced with a newly designed power supply, as detailed in the solution below. 2017.10.11
33510B Modification Recommended 33510B-03 The dot key on front panel intermittently not active. 2018.08.02
33510B Modification Recommended 33510B-04 The trigger LED does not blink when burst mode is set to on. 2018.10.02
33510B Information Only 33510B-05 LAN connection failure when connected to external switch/hub. 2023.07.26
33511B Modification Recommended 33511B-02 Some customers have reported that, when line power is applied to the instrument but the instrument is NOT turned on (“Standby Mode”), some instruments will emit an audible high-pitched whistle or whine. To fix this, the existing power supply must be replaced with a newly designed power supply, as detailed in the solution below. 2017.10.11
33511B Modification Recommended 33511B-03 The dot key on front panel intermittently not active. 2018.08.02
33511B Modification Recommended 33511B-04 The trigger LED does not blink when burst mode is set to on 2018.10.02
33511B Information Only 33511B-05 LAN connection failure when connected to external switch/hub. 2023.07.27
33512B Modification Recommended 33512B-02 Some customers have reported that, when line power is applied to the instrument but the instrument is NOT turned on (“Standby Mode”), some instruments will emit an audible high-pitched whistle or whine. To fix this, the existing power supply must be replaced with a newly designed power supply, as detailed in the solution below. 2017.10.11
33512B Modification Recommended 33512B-03 The dot key on front panel intermittently not active 2018.08.02
33512B Modification Recommended 33512B-04 The trigger LED does not blink when burst mode is set to on. 2018.10.02
33512B Information Only 33512B-06 LAN connection failure when connected to external switch/hub. 2023.07.26
33512B Information Only 33521B-05 LAN connection failure when connected to external switch/hub. 2023.07.26
33519B Modification Recommended 33519B-02 Some customers have reported that, when line power is applied to the instrument but the instrument is NOT turned on (“Standby Mode”), some instruments will emit an audible high-pitched whistle or whine. To fix this, the existing power supply must be replaced with a newly designed power supply, as detailed in the solution below. 2017.10.11
33519B Modification Recommended 33519B-03 The dot key on front panel intermittently not active 2018.08.02
33519B Modification Recommended 33519B-04 The trigger LED does not blink when burst mode is set to on. 2018.10.02
33519B Information Only 33519B-05 LAN connection failure when connected to external switch/hub. 2023.07.26
33520B Modification Recommended 33520B-02 Some customers have reported that, when line power is applied to the instrument but the instrument is NOT turned on (“Standby Mode”), some instruments will emit an audible high-pitched whistle or whine. To fix this, the existing power supply must be replaced with a newly designed power supply, as detailed in the solution below. 2017.10.11
33520B Modification Recommended 33520B-03 The dot key on front panel intermittently not active 2018.08.02
33520B Modification Recommended 33520B-04 The trigger LED does not blink when burst mode is set to on. 2018.10.02
33520B Information Only 33520B-05 LAN connection failure when connected to external switch/hub. 2023.07.26
33521AN Modification Recommended 33521AN-01 Some customers have reported that, when line power is applied to the instrument but the instrument is NOT turned on (“Standby Mode”), some instruments will emit an audible high-pitched whistle or whine. To fix this, the existing power supply must be replaced with a newly designed power supply, as detailed in the solution below. 2017.10.11
33521AN Modification Recommended 33521AN-02 The dot key on front panel intermittently not active 2018.08.02
33521AN Modification Recommended 33521AN-03 The trigger LED does not blink when burst mode is set to on. 2018.10.02
33521AN Information Only 33521AN-04 LAN connection failure when connected to external switch/hub 2023.08.15
33521B Modification Recommended 33521B-02 Some customers have reported that, when line power is applied to the instrument but the instrument is NOT turned on (“Standby Mode”), some instruments will emit an audible high-pitched whistle or whine. To fix this, the existing power supply must be replaced with a newly designed power supply, as detailed in the solution below. 2017.10.11
33521B Modification Recommended 33521B-03 The dot key on front panel intermittently not active 2018.08.02
33521B Modification Recommended 33521B-04 The trigger LED does not blink when burst mode is set to on. 2018.10.02
33522B Modification Recommended 33522B-02 Some customers have reported that, when line power is applied to the instrument but the instrument is NOT turned on (“Standby Mode”), some instruments will emit an audible high-pitched whistle or whine. To fix this, the existing power supply must be replaced with a newly designed power supply, as detailed in the solution below. 2017.10.11
33522B Modification Recommended 33522B-03 The dot key on front panel intermittently not active 2018.08.02
33522B Modification Recommended 33522B-04 The trigger LED does not blink when burst mode is set to on. 2018.10.02
33522B Information Only 33522B-06 LAN connection failure when connected to external switch/hub. 2023.07.26
33611A Modification Recommended 33611A-03 Customers have reported that when power is applied to the instrument but the instrument NOT turned on (“Standby Mode”), some instruments will emit an audible high-pitched whistle or whine. To fix this, the existing power supply must be replaced with the newer power supply, as detailed in the solution below. 2017.01.09
33611A Modification Recommended 33611A-05 Incorrect non-volatile memory size on waveform generators built with FW revision A.02.00 until A.02.02. 2023.06.20
33612A Modification Recommended 33612A-03 Customers have reported that when power is applied to the instrument but the instrument NOT turned on (“Standby Mode”), some instruments will emit an audible high-pitched whistle or whine. To fix this, the existing power supply must be replaced with the newer power supply, as detailed in the solution below. 2017.01.09
33612A Modification Recommended 33612A-06 Incorrect non-volatile memory size on waveform generators built with FW revision A.02.00 until A.02.02. 2023.06.20
33621A Modification Recommended 33621A-03 Customers have reported that when power is applied to the instrument but the instrument NOT turned on (“Standby Mode”), some instruments will emit an audible high-pitched whistle or whine. To fix this, the existing power supply must be replaced with the newer power supply, as detailed in the solution below. 2017.01.09
33621A Modification Recommended 33621A-05 Incorrect non-volatile memory size on waveform generators built with FW revision A.02.00 until A.02.02. 2023.06.20
33622A Modification Recommended 33622A-03 Customers have reported that when power is applied to the instrument but the instrument NOT turned on (“Standby Mode”), some instruments will emit an audible high-pitched whistle or whine. To fix this, the existing power supply must be replaced with the newer power supply, as detailed in the solution below. 2017.01.09
33622A Modification Recommended 33622A-06 Incorrect non-volatile memory size on waveform generators built with FW revision A.02.00 until A.02.02. 2023.06.20
34172B Modification Recommended 34172B-01 Intermittent Ohm measurement failure when using shorting block. 2018.08.06
34401A Modification Recommended 34401A-02 Modification resizes input terminals to accept European plugs 1993.03.31
34401A Modification Recommended 34401A-03 Mod improves time stability of DC current ranges (10 mA/100 mA) 1994.03.10
34401A Modification Recommended 34401A-05A Excessive time drift of ohms function calibration 1995.01.11
34401A Information Only 34401A-06 Display assembly replacement requires compatible firmware. 1996-01
34401A Modification Recommended 34401A-07 Mod corrects RS-232 communication error 1996.06.13
34401A Modification Recommended 34401A-08 Communication on the GPIB stops or an error flag is set under some operating conditions 1997.08.31
34401A Modification Recommended 34401A-09 Mod to eliminate infrequent erroneous ""overload"" indication 2001.01.07
34401A Modification Recommended 34401A-10A RS232 Communication Error for the HP34401A 1998.06.30
34401A Modification Recommended 34401A-11 Failure to meet the 1M & 10M 4-Wire ohm 1yr specs 1999.02.17
34401A Modification Recommended 34401A-12 10 megohm and 100 megohm ranges drift out of specification 2003.10.08
34401A Modification Recommended 34401A-15B 10 megohm and 100 megohm ranges drift out of specification 2011.10.03
34401A Modification Recommended 34401A-16A The instrument may not show the correct voltage, when measuring a voltage in the range of -67 to -124 volts DC. 2011.08.08
34401A Modification Recommended 34401A-17B Temperature drift out of accuracy specification on 3 Amp 2012.04.02
34401A Modification Recommended 34401A-18 AC Volts accuracy may drift out of specification before first calibration 2014.06.01
34401A Modification Recommended 34401A-21 Customer reported out of box failures of the 90 day 1000V DCV Gain Verification and 100V/1 kHz ACV Gain Verification points. Replacement unit provided to customer also exhibited the same failures. Investigation revealed instability of a test instrument used during factory calibration and verification. 2017.10.08
34405A Modification Available 34405A-01 Firmware upgrade to eliminate Error 631 or Error 635 when self-test is performed 2007.03.01
34405A Modification Available 34405A-02 Firmware upgrade to resolve turn on failure and performance improvement 2007.09.10
34405A Modification Available 34405A-05 Firmware upgrade to resolve intermittent turn on failure 2012.05.01
34405A Modification Recommended 34405A-06 Firmware to resolve Error 635 during power cycle 2013.01.14
34405A Modification Recommended 34405A-07 No display after power on the unit. 2014.03.23
34405A Information Only 34405A-08 34405A Digital Multimeter will be replaced by 34450A Digital Multimeter 2016.12.20
34410A Modification Recommended 34410A-01A-RECALL RECALL-The 34410A has an ‘adjust always’ policy recommended by the supplying division. The calibration values determined in the adjustment routine were not stored in non-volatile memory. As a result, the unit reverted to the conditions indicated by the “As Received” conditions in the cal cert and the “As Received” measurement report. The conditions indicated in the “As Completed” conditions in the cal cert and the “As Completed” measurement report are not valid. 2010.06.01
34410A Modification Recommended 34410A-02 Several 34410A DMM units have a zero offset due to a defective shorting block used in the production calibration system. 2014.07.13
34411A Modification Recommended 3441XA-01A Procedure to latch display PCA if not properly installed. 2006.09.12
34411A Modification Recommended 34411A-01A-RECALL RECALL-The 34411A has an "adjust always" policy recommended by the supplying division. The calibration values determined in the adjustment routine were not stored in non-volatile memory. As a result, the unit reverted to the conditions indicated by the “As Received” conditions in the cal cert and the “As Received” measurement report. The conditions indicated in the “As Completed” conditions in the cal cert and the “As completed” measurement report are not valid. 2010.06.02
34411A Modification Recommended 34411A-02 Several 34411A DMM units did not get a good zero calibration in production due to a defective shorting block. 2014.07.13
34420A Modification Recommended 34420A-01 Mod corrects RS-232 communication error 1996.06.13
34420A Modification Recommended 34420A-02A RS232 Communication error for the 34420A 1998.10.07
34420A Modification Available 34420A-03 Infrequent HP-IB Hang-ups 1999.02.17
34420A Modification Recommended 34420A-04 Inaccurate temperature readings 1999.02.17
34450A Modification Recommended 34450A-01A Mechanical rattling noise due to detached shield plate. 2014.05.05
34450A Modification Available 34450A-03 Intermittent freeze occurring on screen resolve by firmware reinstallation. 2013.07.04
34450A Modification Recommended 34450A-04 34450A unit missing calibration traceability 2013.11.05
34450A Safety 34450A-05-S 34450A 5 ½ Digit Multimeter with firmware version 00.60-00.66 and below displays incorrect reading when powered with 60Hz AC line under DCV Measurement in Slow measurement mode when measuring signals above 120V DC. 2015.08.31
34450A Modification Recommended 34450A-06 34450A within the serial number range may not meet the10nF range capacitance, 100mV range DC Voltage and 100 MOhm range resistance measurements specification within the first year shipment. 2015.11.17
34450A Modification Recommended 34450A-07 2-wire resistance measurement may be out of specification at 10MOhm range. 2016.09.21
34460A Modification Recommended 34460A-02 Various instruments may exhibit an accelerated DCV drift rate which exceeds product specifications. 2014.09.14
34460A Modification Recommended 34460A-05 Keysight 34460A/34461A/34465A/34470A Digital Multimeter with firmware version below “FW 2.17” may experience ACV out of specification. 2018.04.16
34460A Modification Recommended 34460A-07A Incorrect label printing on the DMM front panel. 2021.02.08
34460A Modification Recommended 34460A-08 Failure due to front panel loose issue 2022.08.17
34461A Modification Recommended 34461A-02 Various instruments may exhibit an accelerated DCV drift rate which exceeds product specifications. 2014.09.14
34461A Information Only 34461A-04A Specification change in the maximum allowable measured voltage for the Keysight 34460A/34461A/34465A/34470A Digital Multimeter. 2017.04.28
34461A Modification Recommended 34461A-05 Keysight 34460A/34461A/34465A/34470A Digital Multimeter with firmware version below “FW 2.17” may experience ACV out of specification. 2018.04.16
34461A Modification Recommended 34461A-06 Units may exhibit an accelerated DCV drift rate which exceeds the 90-days or 1-year product specification within 2 weeks of usage. 2018.06.05
34461A Modification Recommended 34461A-08A Incorrect label printing on the DMM front panel . 2021.02.08
34461A Modification Recommended 34461A-09 Failure due to front panel loose issue. 2022.02.01
34465A Modification Recommended 34465A-02 Keysight 34460A/34461A/34465A/34470A Digital Multimeter with firmware version below “FW 2.17” may experience ACV out of specification. 2018.04.17
34465A Modification Recommended 34465A-05A Incorrect label printing on the DMM front panel. 2021.02.08
34465A Modification Recommended 34465A-06 Failure due to front panel loose issue. 2022.02.01
34470A Modification Recommended 34470A-02 Keysight 34460A/34461A/34465A/34470A Digital Multimeter with firmware version below “FW 2.17” may experience ACV out of specification. 2018.04.16
34470A Modification Recommended 34470A-05A Incorrect label printing on the DMM front panel. 2021.02.08
34470A Modification Recommended 34470A-06 Failure due to front panel loose issue. 2022.02.01
34703A Modification Recommended 34703A-7 Serial Numbers: Prior to 1251A01651 – TEMPERATURE SENSITIVE OHMS OPERATION 1975-04
34703A Modification Recommended 34703A-8 Serial Numbers: Prior to 1251A01351 – FAILURE OF AUTO MODE TEST 8 1975-04
34703A Modification Recommended 34703A-9 Serial Numbers: 1251AOl700 and below – IMPROPER OHMS OPERATION DUE TO BROKEN Al BOARD 1975-05
34901A Modification Recommended 34901A-01A Top cover of modules are out of tolerence causing the modules to not fit properly into the mainframe. 2002.03.31
34901A Modification Recommended 34901A-02 Internal reference junction temperature sensor improvement 2000.11.06
34901A Modification Recommended 34901A-04B 34901A temperature measurements out of specification 2006.09.27
34901A Modification Recommended 34901A-05 The relays used in these modules may have contaminated contacts that cause intermittent high resistance. 2012.06.04
34901A Modification Recommended 34901A-07 Hard or too tight to insert the module into 34970A/34972A 2018.01.17
34902A Modification Recommended 34902A-01A Modification corrects unwanted simultaneously relay closures 1998.03.01
34902A Modification Recommended 34902A-02A Top cover of modules are out of tolerance causing the modules to not fit properly into the mainframe. 2002.04.10
34902A Modification Recommended 34902A-03 New Code Eliminates Simultaneous Closure of All Channel Relays 1999.02.17
34902A Modification Recommended 34902A-04 Internal reference junction temperature sensor improvement 2000.11.06
34902A Modification Recommended 34902A-06B temperature measurements out of specification 2006.09.27
34902A Modification Recommended 34902A-08 Hard or too tight to insert the module into 34970A/3497 2018.01.17
34903A Modification Recommended 34903A-01A Top covers of modules are out of tolerance causing the modules to not fit properly into the mainframe. 2002.04.11
34903A Modification Recommended 34903A-02 The relays used in these modules may have contaminated contacts that cause intermittent high resistance. 2012.06.04
34904A Modification Recommended 34904A-01A Top cover of modules are out of tolerance causing the modules to not fit properly into the mainframe. 2002.04.17
34904A Modification Recommended 34904A-03 The relays used in these modules may have contaminated contacts that cause intermittent high resistance. 2012.06.04
34905A Modification Recommended 34905A-01A Topcover of modules are out of tolerance causing the modules to not fit properly into the mainframe. 2002.04.17
34907A Modification Recommended 34907A-01 34970A's modules do not fit into mainframes 1998.11.10
34908A Modification Recommended 34908A-01 34970A's modules do not fit into mainframes 1998.11.10
34908A Modification Recommended 34908A-02 Internal reference junction temperature sensor improvement 2000.11.06
34908A Modification Recommended 34908A-04B temperature measurements out of specification 2006.09.27
34908A Modification Recommended 34908A-05 The relays used in these modules may have contaminated contacts that cause intermittent high resistance. 2012.06.04
34908A Modification Recommended 34908A-07 Hard or too tight to insert the module into 34970A/34972A 2018.01.17
34921A Modification Recommended 34921A-01A Relays may have contaminated contacts that can cause intermittent contact resistance in excess of 100 ohms. 2013.06.06
34921A Modification Recommended 34921A-02 Intermittent contact resistance with Analog Bus (ABus) relays. 2013.06.06
34921A Information Only 34921A-04 New Orbital Sanded Covers for 34980A modules 2022.06.27
34922A Modification Recommended 34922A-01A Relays may have contaminated contacts that can cause intermittent contact resistance in excess of 100 ohms. 2013.06.06
34922A Modification Recommended 34922A-02 Intermittent contact resistance with Analog Bus (ABus) relays. 2013.06.06
34922A Information Only 34922A-04 New Orbital Sanded Covers for 34980A modules 2022.06.27
34922T Modification Recommended 34922T-01 Unable to connect to mating connector 2022.05.01
34923A Modification Recommended 34923A-01 Intermittent contact resistance with Analog Bus (ABus) relays. 2013.06.06
34923A Information Only 34923A-03 New Orbital Sanded Covers for 34980A modules 2022.06.27
34924A Modification Recommended 34924A-01 Intermittent contact resistance with Analog Bus (ABus) relays. 2013.06.06
34924A Information Only 34924A-03 New Orbital Sanded Covers for 34980A modules 2022.06.27
34924T Modification Recommended 34924T-01 Unable to connect to mating connector 2022.05.01
34925A Modification Recommended 34925A-01 Intermittent contact resistance with Analog Bus (ABus) relays. 2013.06.06
34925A Information Only 34925A-03 New Orbital Sanded Covers for 34980A modules 2022.06.27
34931A Modification Recommended 34931A-01A Relays may have contaminated contacts that can cause intermittent contact resistance in excess of 100 ohms. 2013.06.06
34931A Modification Recommended 34931A-02 Intermittent contact resistance with Analog Bus (ABus) relays. 2013.06.06
34931A Information Only 34931A-04 New Orbital Sanded Covers for 34980A modules 2022.06.27
34932A Modification Recommended 34932A-01A Relays may have contaminated contacts that can cause intermittent contact resistance in excess of 100 ohms. 2013.06.06
34932A Modification Recommended 34932A-02 Intermittent contact resistance with Analog Bus (ABus) relays. 2013.06.06
34932A Information Only 34932A-04 New Orbital Sanded Covers for 34980A modules 2022.06.27
34933A Modification Recommended 34933A-01 Intermittent contact resistance with Analog Bus (ABus) relays. 2013.06.06
34933A Information Only 34933A-02 New Orbital Sanded Covers for 34980A modules 2022.06.27
34934A Information Only 34934A-02 New Orbital Sanded Covers for 34980A modules 2022.06.27
34934C Modification Recommended 34934C-01 Unable to connect to mating connector 2022.05.01
34934T Modification Recommended 34934T-01 Unable to connect to mating connector 2022.05.01
34937A Modification Recommended 34937A-01 Firmware Upgrade to correct defect 2005.07.10
34937A Modification Recommended 34937A-02B Relays may have contaminated contacts that can cause intermittent contact resistance in excess of 100 ohms. 2014.06.01
34937A Information Only 34937A-04 New Orbital Sanded Covers for 34980A modules 2022.06.27
34938A Modification Recommended 34938A-01 Firmware Upgrade to correct defect 2005.07.10
34938A Information Only 34938A-02 New Keysight Color 2020.02.13
34938A Information Only 34938A-03 New Orbital Sanded Covers for 34980A modules 2022.06.27
34939A Modification Recommended 34939A-01A Relays may have contaminated contacts that can cause intermittent contact resistance in excess of 100 ohms. 2013.06.06
34939A Information Only 34939A-03 New Orbital Sanded Covers for 34980A modules 2022.06.27
34939T Modification Recommended 34939T-01 Unable to connect to mating connector 2022.05.01
34941A Information Only 34941A-02 New Orbital Sanded Covers for 34980A modules 2022.06.27
34942A Information Only 34942A-02 New Orbital Sanded Covers for 34980A modules 2022.06.27
34945A Modification Recommended 34945A-01 Missing or corrupted FPGA code resulting in error message on 2005.11.30
34945A Information Only 34945A-04 New Orbital Sanded Covers for 34980A modules 2022.06.27
34946A Information Only 34946A-02 New Orbital Sanded Covers for 34980A modules 2022.06.27
34947A Information Only 34947A-02 New Orbital Sanded Covers for 34980A modules 2022.06.27
34950A Information Only 34950A-02 New Orbital Sanded Covers for 34980A modules 2022.06.27
34951A Modification Recommended 34951A-02 Relay contact contamination causes variation in performance. 2013.06.06
34951A Information Only 34951A-04 New Orbital Sanded Covers for 34980A modules 2022.06.27
34952A Modification Recommended 34952A-01 Configured digital input channels are unable to read values correctly from digital output channels 2019.08.13
34952A Information Only 34952A-03 New Orbital Sanded Covers for 34980A modules 2022.06.27
34959A Information Only 34959A-01 New Orbital Sanded Covers for 34980A modules 2022.06.27
34959A Modification Recommended 34959A-02 Failure on 34959A Digital I/O Function. 2022.09.26
34970A Modification Recommended 34970A-01 Numeric errors associated with the scaling function 1998.03.01
34970A Modification Recommended 34970A-02B 34970A Intermittently Fails to Power On 2001.10.31
34970A Modification Recommended 34970A-03 34970A's real-time system clock changes by one hour 1998.11.10
34970A Modification Recommended 34970A-07 Incorrect temp measurements during read/write 2001.02.07
34970A Modification Recommended 34970A-08A Incorrect wiring in RS232 Cable (shipped with 34970A). 2002.03.13
34970A Safety 34970A-09B-S AC power connector can be damaged which creates a shock hazard. 2013.06.04
34970A Modification Recommended 34970A-10 34970A Powered by 50 Hz Line Frequency Incorrectly Measures Resistance 2003.06.01
34970A Modification Recommended 34970A-11 Firmware Update: Ohms current source output during other functions 2003.06.12
34970A Modification Recommended 34970A-13 10 MegOhm and 100 MegOhm ranges drift out of specification due to the Ohm's current source reference resistor. This resistor may change in value with time. 2003.10.05
34970A Modification Recommended 34970A-14C Intermittent errors in less than 1% of 34970A’s. 2010.11.19
34970A Modification Recommended 34970A-15 10 MΩ and 100 MΩ Ranges Drift Out of Specification 2011.05.31
34970A Modification Recommended 34970A-18 AC Volts and AC Current accuracy may drift out of specification before first calibration 2014.06.22
34972A Modification Recommended 34972A-01 10 MΩ and 100 MΩ Ranges Drift Out of Specification 2011.05.31
34972A Modification Recommended 34972A-02 AC Volts and AC Current accuracy may drift out of specification before first calibration 2014.06.22
34972A Modification Recommended 34972A-06B Device USB communication may experience data or connection loss 2019.05.07
34972A Modification Recommended 34972A-08 1 V/ 100 kHz Frequency Gain Verification test point failed to meet the specification. 2019.08.28
34980A Modification Recommended 34980A-01 The GPIB connector may have been installed using an incorrect size threaded standoff nut. 2005.06.06
34980A Modification Recommended 34980A-03 Intermittently 34980A units would not recognize the DMM anymore showing DMM revision to be 0.00 2009.11.18
34980A Modification Recommended 34980A-05 Instrument cannot operate in 400 Hz 2015.07.01
34980A Modification Recommended 34980A-06 Devices found to have duplicate MAC addresses can cause an IP conflict when connected on the same local network. 2019.03.10
34980A Information Only 34980A-08 Removal of screwdriver as a standard shipped accessory 2022.11.02
35652A Modification Recommended 35652A-01 Mod improves reliability of microdot connector 1994.02.10
35652B Modification Recommended 35652B-01 Mod improves reliability of microdot connector 1994.02.10
35670A Modification Recommended 35670A-01 Mod fixes sticking power supply switch 1993.11.11
35670A Modification Available 35670A-03 Firmware upgrade provides new features and fixes defects 1994.11.03
35670A Modification Recommended 35670A-07 Catalog of disk remains displayed after disk is ejected 1999.04.05
37212B Modification Available 37212B-02C Recommended firmware upgrade improves performance 1992.03.31
37701A Modification Available 37701A-02 Additional features can be retrofitted to older instruments 1992.03.31
37701A Modification Available 37701A-03 Pulse Shape measurement capability (Opt. 001) can be retrofitted 1992.03.31
37701A Modification Recommended 37701A-04 Mod corrects automatic gain control problem on A6 assembly 1993.12.31
37701A Modification Recommended 37701A-05 New improved battery holder makes NVM battery repl easy 1993.12.31
37701A Modification Recommended 37701A-06 New firmware fixes fatal error 421 when printing Datacom Graph 1993.12.31
37701A Modification Recommended 37701A-07 Incorrect TERM level measurement on A1 Measurement Assembly 1994.08.04
37701B Modification Recommended 37701B-01 New F/W corrects error in FULL-T1 mode & Fractional-T1 mode 1994.08.04
37702A Modification Recommended 37702A-01 Incorrect TERM level measurement on A1 Measurement Assembly 1994.08.04
37702A Modification Recommended 37702A-02 New F/W corrects error in FULL-T1 mode & Fractional-T1 mode 1994.08.04
37704A Modification Recommended 37704A-02 Power supply modification improves performance 1995.05.11
37711A Modification Available 37711A-02 Additional features can be retrofitted to older instruments 1992.03.31
37711A Modification Available 37711A-03 Pulse Shape measurement capability (Opt. 001) will be retrofitted 1992.03.31
37711A Modification Recommended 37711A-04 Mod corrects automatic gain control problem on A6 assembly 1993.12.31
37711A Modification Recommended 37711A-05 New improved battery holder makes NVM battery repl easy 1993.12.31
37711A Modification Recommended 37711A-06 New firmware fixes fatal error 421 when printing Datacom Graph 1993.12.31
37711A Modification Recommended 37711A-07 Incorrect TERM level measurement on A1 Measurement Assembly 1994.08.04
37718A Modification Recommended 37718A-07 Optical power warning label 2002.06.25
37719A Modification Recommended 37719A-06 Optical power warning label 2002.06.25
37743A Modification Recommended 37743A-01A Mod corrects incorrectly loaded capacitor on transmitter board 1993.12.31
37907A Modification Recommended 37907A-01 Compatability problem with PCI Bridge chip on original DASS card 2000.01.17
37907A Modification Recommended 37907A-02 Sometimes the Interface Modules do not reset properly 2000.01.17
37907A Modification Available 37907A-03 Voice decoding does not switch properly between A/u-Law on Handset 2000.01.17
37907A Modification Available 37907A-04 A Common Mode Oscillation exists on the Handset port 2000.01.17
37907A Modification Available 37907A-05B Upgrading 133M Win95 to 300M Win98 2001.08.22
37907A Modification Available 37907A-06 Upgrading 133M Win95 to 300M Win98 2001.08.22
37907A Modification Available 37907A-07 Upgrading SW to Chinese Win98 2001.08.22
37907A Modification Available 37907A-09 Upgrading data acquisition bandwidth 2001.08.22
37915A Modification Available 37915A-01B Operational Defects at Level 2 of SS7 Protocol 1999.02.17
37916A Modification Available 37916A-01A Operational Defects at Level 2 of SS7 Protocol 1999.02.17
37918A Modification Available 37918A-01A Operational Defects at Level 2 of SS7 Protocol 1999.02.17
41421B Modification Recommended 41421B-01 41421B voltage force mode may be noisy 2000.11.07
41501A Modification Recommended 41501A-01 New power supply prevents shut-down failures 1994.10.10
41501A Modification Recommended 41501A-03A Power Supl Replcmnt to Prevent Shutdown/Reboot Problem 2000.01.17
41501B Modification Recommended 41501B-01 Main power switch is stuck 2000.10.25
41800A Modification Recommended 41800A-03 Recommended replacement nose assembly for probe pin 1994.11.03
42841A Modification Recommended 42841A-03 Mod. to prevent incorrect shut down caused by thermal switch error 1992.10.31
42841A Modification Recommended 42841A-04B Mod prevents bias current source fuses from blowing 1995.01.11
43521A Priority Safety 43521A-01-S A broken AC inlet may Potentially result in a electric shock hazard. 2000.08.31
44470A Modification Recommended 44470A-01A Defective connectors shipped with 44470A, 44471A, 44473A, 44474A The 44470A, 44471A, 44473A, and 44474A contain a main relay card and a removable screw terminal block (see Figure 1). Some of the removable terminal blocks that were shipped between 1-Jan-2008 and 08-April-2008 have a defective connector that results in half of the pins being unconnected. 2008.04.27
44471A Modification Recommended 44471A-01A Defective connectors shipped with 44470A, 44471A, 44473A, 44474A The 44470A, 44471A, 44473A, and 44474A contain a main relay card and a removable screw terminal block (see Figure 1). Some of the removable terminal blocks that were shipped between 1-Jan-2008 and 08-April-2008 have a defective connector that results in half of the pins being unconnected. 2008.04.27
44473A Modification Recommended 44473A-01A Defective connectors shipped with 44470A, 44471A, 44473A, 44474A The 44470A, 44471A, 44473A, and 44474A contain a main relay card and a removable screw terminal block (see Figure 1). Some of the removable terminal blocks that were shipped between 1-Jan-2008 and 08-April-2008 have a defective connector that results in half of the pins being unconnected. 2008.04.27
44474A Modification Recommended 44474A-01A Defective connectors shipped with 44470A, 44471A, 44473A, 44474A The 44470A, 44471A, 44473A, and 44474A contain a main relay card and a removable screw terminal block (see Figure 1). Some of the removable terminal blocks that were shipped between 1-Jan-2008 and 08-April-2008 have a defective connector that results in half of the pins being unconnected. 2008.04.27
44704A Modification Recommended 44704A-03 Intermittent Extra Readings 1997.06.30
53131A Modification Recommended 53131A-01 Unit powers up in Standby mode. 1996.07.31
53131A Modification Available 53131A-03 GPIB hangs when power for instrument is turned on at the same time as PC. 2003.11.06
53131A Modification Recommended 53131A-07A When signals are applied to both channel 1 and channel 2, and Auto Trigger is used, the channel making the measurement may receive an incorrect trigger. 2010.03.03
53132A Modification Recommended 53132A-01 Unit powers up in Standby mode. 1996.07.31
53132A Modification Available 53132A-03 GPIB hangs when power for instrument is turned on at the same time as PC 2003.11.06
53132A Modification Recommended 53132A-07A When signals are applied to both channel 1 and channel 2, and Auto Trigger is used, the channel making the measurement may receive an incorrect trigger. 2010.03.03
53181A Modification Recommended 53181A-01 Unit powers up in Standby mode. 1996.07.31
53181A Modification Available 53181A-02 GPIB hangs when power for instrument is turned on at the same time as PC. 2003.11.06
53181A Information Only 53181A-03B Some up-grades options for the 53181A Counter can be added by customers (experienced technicians). Other up-grade options must be installed by technical specialists at Agilent Service Centers. 2005.11.11
53220A Modification Recommended 53220A-01A Upgrading Instruments with Firmware Revision 1.05 to 1.08 and Greater 2011.10.04
53230A Modification Recommended 53230A-01A Upgrading Instruments with Firmware Revision 1.05 to 1.08 and Greater 2011.10.04
53310A Safety 53310A-04A-S Chassis ground wire may detach and contact line voltage. 2004.03.23
54501A Safety 54501A-06-S Defective line filter assembly may cause shock 1996.01.31
54502A Safety 54502A-07-S Defective line filter assembly may cause shock 1996.01.31
54503A Safety 54503A-06-S Defective line filter assembly may cause shock 1996.01.31
54504A Safety 54504A-03-S Defective line filter assembly may cause shock 1996.01.31
54510B Safety 54510B-03-S Defective line filter assembly may cause shock 1996.01.31
54512B Safety 54512B-03-S Defective line filter assembly may cause shock 1996.01.31
54520A Safety 54520A-02-S Defective line filter assembly may cause shock 1996.01.31
54520C Safety 54520C-02-S Defective line filter assembly may cause shock 1996.01.31
54522A Safety 54522A-02-S Defective line filter assembly may cause shock 1996.01.31
54522C Safety 54522C-02-S Defective line filter assembly may cause shock 1996.01.31
54540A Safety 54540A-02-S Defective line filter assembly may cause shock 1996.01.31
54540C Safety 54540C-02-S Defective line filter assembly may cause shock 1996.01.31
54542A Safety 54542A-02-S Defective line filter assembly may cause shock 1996.01.31
54542C Safety 54542C-02-S Defective line filter assembly may cause shock 1996.01.31
54600A Safety 54600A-07-S Possible shock hazard if cabinet handle is removed. 1992.08.24
54600A Modification Available 54600A-09 Lubrication leaking from behind control knobs 1993.03.31
54601A Safety 54601A-07-S Possible shock hazard if cabinet handle is removed. 1992.08.24
54602B Modification Recommended 54602B-01 Mod replaces defective BNC connector 1994.05.27
54602B Information Only 54602B-03 New attenuator cover design 1996.03.15
54621D Modification Recommended 54621D-02 Can fail threshold accuracy test 2001.12.03
54622A Modification Available 54622A-01 Tilt adjustment instructions after hemisphere transshipping 2001.07.16
54622D Modification Available 54622D-01 Tilt adjustment instructions after hemisphere transshipping 2001.07.16
54622D Modification Recommended 54622D-02 Can fail threshold accuracy test 2001.12.03
54622D Modification Recommended 54622D-04 Modification recommended. Supersedes Recall Service Note. 2002.04.24
54624A Modification Available 54624A-01 Tilt adjustment instructions after hemisphere transshipping 2001.07.16
54641A Modification Recommended 54641A-01 The 54641A product should have the power supply replaced, if the cooling fan becomes non-operational. 2002.05.08
54641A Modification Recommended 54641A-04 Correcting environmentally caused trace tilt 2004.11.21
54641D Modification Recommended 54641D-01 The 54641D product should have the power supply replaced, if the cooling fan becomes non-operational. 2002.05.08
54641D Modification Recommended 54641D-04 Correcting environmentally caused trace tilt 2004.11.21
54642A Modification Recommended 54642A-01 The 54642A product should have the power supply replaced, if the cooling fan becomes non-operational. 2002.05.08
54642A Modification Recommended 54642A-04 Correcting environmentally caused trace tilt 2004.11.21
54642D Modification Recommended 54642D-01 The 54642D product should have the power supply replaced, if the cooling fan becomes non-operational. 2002.05.08
54642D Modification Recommended 54642D-04 Correcting environmentally caused trace tilt 2004.11.21
54754A Modification Available 54754A-03 Add ESD shutter protection to electrical inputs on module. 2004.09.27
54754A Modification Recommended 54754A-04 TDR Module fails Vertical CAL, 2004.10.03
54810A Modification Recommended 54810A-07B Correct intermittent lockups caused by the motherboard. 2005.02.16
54815A Modification Recommended 54815A-07B Correct intermittent lockups caused by the motherboard. 2005.02.10
54820A Modification Recommended 54820A-07B Correct intermittent lockups caused by the motherboard. 2005.02.10
54825A Information Only 54825A-01B Replacing Older A4 AMI PC Motherboard Requires Extra Parts 2002.08.27
54825A Modification Recommended 54825A-02 Improved Side-Handle Mounting Screw Recommended 1998-07
54825A Modification Recommended 54825A-04 Adding LAN to the Infiniium 1998-08
54825A Information Only 54825A-05 Model 54810A Infinium Oscilloscopes 1998-09
54825A Modification Recommended 54825A-06 Upgrade Infinium Oscilloscopes With 64 MB RAM For Improved Performance and Reliability 1999-03
54825A Modification Recommended 54825A-07A Correct Intermittent Lockups Caused By the Motherboard etc 2000-07
54825A Modification Recommended 54825A-07B Correct intermittent lockups caused by the motherboard. 2005.02.10
54825A Modification Available 54825A-08 Infiniium Oscilloscope Performance Upgrade E2633A obsoleted and replaced with upgrade kits 2001-05
54825A Information Only 54825A-09 54825A Infiniium Oscilloscopes – 2Gsa/s, 4 Ch, 500MHZ 2002.05.20
54830B Modification Available 54830B-08A Screws on acquisition board may become loose during shipment. 2009.03.24
54830D Modification Available 54830D-08A Screws on acquisition board may become loose during shipment. 2009.03.24
54831B Modification Available 54831B-08A Screws on acquisition board may become loose during shipment. 2009.03.24
54831D Modification Available 54831D-08A Screws on acquisition board may become loose during shipment. 2009.03.24
54832B Modification Available 54832B-08A Screws on acquisition board may become loose during shipment. 2009.03.24
54832D Modification Available 54832D-08A Screws on acquisition board may become loose during shipment. 2009.03.24
54833A Modification Available 54833A-08A Screws on acquisition board may become loose during shipment. 2009.03.24
54833D Modification Available 54833D-08A Screws on acquisition board may become loose during shipment. 2009.03.24
54835A Modification Recommended 54835A-07B Correct intermittent lockups caused by the motherboard. 2005.02.10
54845A Information Only 54845A-01A Replacing Older A4 PC Motherboard Requires Extra Parts 1999-01
54845A Modification Recommended 54845A-02 Improved Side-Handle Mounting Screw Recommended 1998-07
54845A Modification Recommended 54845A-03 Install Spacers to Protect A/D Hybrids From Damage 1998-05
54845A Modification Recommended 54845A-04 Adding LAN to the Infiniium 1998-08
54845A Information Only 54845A-05 Active probe calibration not working correctly in code rev. A.02.02 1998-09
54845A Modification Recommended 54845A-06 Upgrade Infinium Oscilloscopes With 64 MB RAM For Improved Performance and Reliability 1999-03
54845A Modification Recommended 54845A-07A Correct Intermittent Lockups Caused By the Motherboard etc 2000-07
54845A Modification Recommended 54845A-07B Correct intermittent lockups caused by the motherboard. 2005.02.10
54845A Modification Available 54845A-08 Infiniium Oscilloscope Performance Upgrade E2633A obsoleted and replaced with upgrade kits 2001-05
54845A Information Only 54845A-09 54845A Infiniium Oscilloscope 1.5 GHz,4ch, 4-8 Gsa/s. Infiniium Units that are shipped with Acquisition board number 54845-66538 will have problems storing the calibration cal-factors with system firmware A.04.30. Units will pass User Self-calibration, but if the unit’s power is cycled the cal-factors will not be saved, and the unit will be un-calibrated. 2002.04.25
54845A Information Only 54845A-10A This Service note is providing instructions for an alternate repair strategy for 54845A Infiniium Scope, when the A13 54845-69527 Exchange board is not available. 2002.07.30
54845A Information Only 54845A-11 This Service note is providing performance verification instructions to Service Centers repairing Infiniium Oscilloscopes. 2002.05.20
54845A Information Only 54845A-12A This Service note is communicating a possible repair strategy for instruments failing Trigger Self-Calibration. 2002.09.05
59301A Information Only 59301A-2 HP-IB VERIFICATION PROGRAM USING THE 9825A 1977-02
64145A Modification Recommended 64145A-01 New ROM firmware fixes incorrect SEB instruction 1992.02.29
66000A Modification Recommended 66000A-01 Unit resets when in serial link mode 1993.02.19
66000A Modification Recommended 66000A-02 New resistor values for ac line input prevents failure 00052000 1993.01.06
66000A Modification Recommended 66000A-03 A1-U1 may short due to overshoots in the bias supply 1995.01.11
66000A Modification Recommended 66000A-04 New F/W improves SRQ performance after a serial poll 1995.02.16
66000A Modification Recommended 66000A-05 Non-functioning trigger In/Out capability when using multiple 6610XA modules 2007.03.21
66000A Modification Recommended 66000A-06A The instrument will not communicate or will not complete self test 2008.10.26
66000A Modification Recommended 66000A-07 The AC INPUT SAFETY COVER has a strain relief used to secure the AC line cord that may become loose. 2009.10.08
66101A Modification Recommended 66101A-01 Modification prevents output connector cover assemblies from cracking 1993.03.31
66101A Modification Recommended 66101A-02 PS may OV when load is removed at high output voltages 1995.02.16
66101A Modification Recommended 66101A-03 Status reported before Delay 1995.12.31
66101A Modification Recommended 66101A-04 New F/W corrects OCP occurring before Output off 1996.03.14
66101A Modification Recommended 66101A-05 New F/W makes List Mode work from the keyboard 1996.03.14
66101A Modification Recommended 66101A-06 Turnoff voltage overshoot 1998.03.01
66101A Modification Recommended 66101A-07A Leaky A2 bias supply capactiors C401 & C405 2002.07.15
66101A Modification Available 66101A-08A The instrument will not communicate or will not complete self test 2008.10.26
66101A Modification Recommended 66101A-09A The Instrumment will not communicate or will not complete self test 2008.10.29
66102A Modification Recommended 66102A-01 Modification prevents output connector cover assemblies from cracking 1993.03.31
66102A Modification Recommended 66102A-02 Status reported before Delay 1995.12.31
66102A Modification Recommended 66102A-03 OCP may occur during Output Off 1995.12.31
66102A Modification Recommended 66102A-04 List Mode does not work from keyboard 1995.12.31
66102A Modification Recommended 66102A-05 Turnoff voltage overshoot 1998.03.01
66102A Modification Recommended 66102A-06A Leaky A2 Bias Supply Capacitors C401 & C405 2002.07.16
66102A Modification Available 66102A-07A The Instrumment will not communicate or will not complete self test 2008.10.26
66102A Modification Recommended 66102A-08A The Instrumment will not communicate or will not complete self test 2008.10.29
66103A Modification Recommended 66103A-01 Modification prevents output connector cover assemblies from cracking 1993.03.31
66103A Modification Recommended 66103A-02 Status reported before Delay 1995.12.31
66103A Modification Recommended 66103A-03 OCP may occur during Output Off 1995.12.31
66103A Modification Recommended 66103A-04 List Mode does not work from keyboard 1995.12.31
66103A Modification Recommended 66103A-05 Turnoff voltage overshoot 1998.03.01
66103A Modification Recommended 66103A-06A Leaky A2 Bias Supply Capacitors C401 & C405 2002.07.16
66103A Modification Available 66103A-07A The Instrumment will not communicate or will not complete self test 2008.10.26
66103A Modification Recommended 66103A-08A The Instrumment will not communicate or will not complete self test 2008.10.29
66104A Modification Recommended 66104A-01 Modification prevents output connector cover assemblies from cracking 1993.03.31
66104A Modification Recommended 66104A-02 Modification prevents output oscillation in 2 to 3 kHz range 1993.03.31
66104A Modification Recommended 66104A-03 Status reported before Delay 1995.12.31
66104A Modification Recommended 66104A-04 OCP may occur during Output Off 1995.12.31
66104A Modification Recommended 66104A-05 List Mode does not work from keyboard 1995.12.31
66104A Modification Recommended 66104A-06 Turnoff voltage overshoot 1998.03.01
66104A Modification Recommended 66104A-07A Leaky A2 Bias Supply Capacitors C401 & C405 2002.07.16
66104A Modification Available 66104A-08A The Instrumment will not communicate or will not complete self test 2008.10.26
66104A Modification Recommended 66104A-09A The Instrumment will not communicate or will not complete self test 2008.10.29
66105A Modification Recommended 66105A-01 Modification prevents output connector cover assemblies from cracking 1993.03.31
66105A Modification Recommended 66105A-02 Supply may oscillate below 15 volts 1995.01.11
66105A Modification Recommended 66105A-03 Status reported before Delay 1995.12.31
66105A Modification Recommended 66105A-04 OCP may occur during Output Off 1995.12.31
66105A Modification Recommended 66105A-05 List Mode does not work from keyboard 1995.12.31
66105A Modification Recommended 66105A-06 Turnoff voltage overshoot 1998.03.01
66105A Modification Recommended 66105A-07A Leaky A2 Bias Supply Capacitors C401 & C405 2002.07.16
66105A Modification Available 66105A-08A The Instrumment will not communicate or will not complete self test 2008.10.26
66105A Modification Recommended 66105A-09A The Instrumment will not communicate or will not complete self test 2008.10.29
66106A Modification Recommended 66106A-01 Modification prevents output connector cover assemblies from cracking 1993.03.31
66106A Modification Recommended 66106A-02 Status reported before Delay 1995.12.31
66106A Modification Recommended 66106A-03 OCP may occur during Output Off 1995.12.31
66106A Modification Recommended 66106A-04 List Mode does not work from keyboard 1995.12.31
66106A Modification Recommended 66106A-05 Turnoff voltage overshoot 1998.03.01
66106A Modification Recommended 66106A-06A Leaky A2 Bias Supply Capacitors C401 & C405 2002.07.16
66106A Modification Available 66106A-07A The Instrumment will not communicate or will not complete self test 2008.10.27
66106A Modification Recommended 66106A-08A The Instrumment will not communicate or will not complete self test 2008.10.29
66309B Modification Recommended 66309B-03B Unit Exchange Program 2001.01.31
66309B Modification Available 66309B-05 Reliability Inprovement, GPIB/RS232 Interface 2003.08.03
66309B Modification Recommended 66309B-06 Unit Exchange Program 2004.03.17
66309B Modification Recommended 66309B-07 On faster computers, when programming over GPIB, a random error will occur. 2005.09.28
66309B Modification Recommended 66309B-08A The unit can exhibit power-on self-test errors, auto reboot, blank display, no output, and communication errors. 2015.12.15
66309B Modification Recommended 66309B-09 Power-On Self test Errors, Auto reboot, Blank display. No output Communication errors. No communication when using the GPIB Interface. 2012.06.17
66309B Modification Recommended 66309B-080-01B Unit Exchange Program 2001.01.31
66309B Modification Recommended 66309B-521-02B Unit exchange program 2001.05.22
66309B Modification Available 66309B-521-03 Reliability Improvement, GPIB/RS232 Interface 2003.08.04
66309B Modification Recommended 66309B-521-04 Unit Exchange Program 2004.03.16
66309D Modification Recommended 66309D-03B Unit Exchange Program 2001.01.31
66309D Modification Recommended 66309D-05 Unit Exchange Program 2004.03.17
66309D Modification Recommended 66309D-06 On faster computers, when programming over GPIB, a random error will occur. 2005.09.29
66309D Modification Recommended 66309D-07A The unit can exhibit power-on self-test errors, auto reboot, blank display, no output, and communication errors. 2015.12.15
66309D Modification Recommended 66309D-08 Power-On Self test Errors, Auto reboot, Blank display. No output Communication errors. No communication when using the GPIB Interface. 2012.06.18
66309D Modification Recommended 66309D-080-01B Unit Exchange Program 2001.01.31
66309D Modification Recommended 66309D-521-02B Unit Exchange Program 2001.01.31
66309D Modification Available 66309D-521-03 Reliability Improvement, GPIB/RS232 Interface 2003.08.04
66309D Modification Recommended 66309D-521-04 Unit Exchange Program 2004.03.17
66311B Modification Recommended 66311B-03B Unit Exchange Program 2001.01.31
66311B Modification Available 66311B-05 Reliability Improvement GPIB/RS232 Interface 2003.08.04
66311B Modification Recommended 66311B-06 Unit Exchange Program 2004.03.17
66311B Modification Recommended 66311B-07 On faster computers, when programming over GPIB, a random error will occur. 2005.09.28
66311B Modification Recommended 66311B-08A The unit can exhibit power-on self-test errors, auto reboot, blank display, no output, and communication errors. 2015.12.15
66311B Modification Recommended 66311B-09 Power-On Self test Errors, Auto reboot, Blank display. No output Communication errors. No communication when using the GPIB Interface. 2012.06.17
66311B Modification Recommended 66311B-080-01B Unit Exchange Program 2001.01.31
66311B Modification Recommended 66311B-J02-03B Unit Exchange Program 2001.01.31
66311B Modification Recommended 66311B-J02-04 Unit Exchange Program 2004.03.17
66311D Modification Recommended 66311D-03B Unit Exchange Program 2001.01.31
66311D Modification Recommended 66311D-06 Unit Exchange Program 2004.03.17
66311D Modification Recommended 66311D-07 On faster computers, when programming over GPIB, a random error will occur. 2005.09.28
66311D Modification Recommended 66311D-080-01B Unit exchange program 2001.05.22
66312A Modification Recommended 66312A-06B Unit Exchange Program 2001.01.31
66312A Safety 66312A-07 POSSIBLE “SHOCK” HAZARD 2002.02.18
66312A Modification Recommended 66312A-10 On faster computers, when programming over GPIB, a random error will occur. 2005.09.28
66312A Modification Recommended 66312A-080-01A Unit exchange program 2001.05.22
66312A Modification Recommended 66312A-080-01B Unit Exchange Program 2001.01.31
66312A Modification Recommended 66312A-J01-01 MODIFICATION TO IMPROVE PERFORMANCE 2001.10.31
66312A Modification Recommended 66312A-J02-01 MODIFICATION TO IMPROVE PERFORMANCE 2001.10.31
66312A Modification Recommended 66312A-J02-02 MODIFICATION TO IMPROVE PERFORMANCE 2001.10.31
66312A Modification Recommended 66312A-J03-01 MODIFICATION TO IMPROVE PERFORMANCE 2001.10.31
66312A Modification Recommended 66312A-J04-01 MODIFICATION TO IMPROVE PERFORMANCE 2001.10.31
66312A Modification Recommended 66312A-J04-02 MODIFICATION TO IMPROVE PERFORMANCE 2001.10.31
66312A Modification Recommended 66312A-J04-03B Unit Exchange Program 2001.01.31
66312A Modification Recommended 66312A-J05-01 MODIFICATION TO IMPROVE PERFORMANCE 2001.10.31
66312A Modification Recommended 66312A-J05-02 MODIFICATION TO IMPROVE PERFORMANCE 2001.10.31
66312A Modification Recommended 66312A-J08-01 MODIFICATION TO IMPROVE PERFORMANCE 2001.10.31
66312A Modification Recommended 66312A-J08-03B Unit exchange program 2001.05.22
66319B Modification Recommended 66319B-01B Unit Exchange Program 2001.01.31
66319B Modification Recommended 66319B-02 Fetch: Current? Error 603 2001.05.29
66319B Modification Available 66319B-05 Reliability Improvement, GPIB/RS232 Interface 2003.08.04
66319B Modification Recommended 66319B-06 Unit Exchange Program 2004.03.18
66319B Modification Recommended 66319B-07 On faster computers, when programming over GPIB, a random error will occur. 2005.09.28
66319B Modification Recommended 66319B-08A The unit can exhibit power-on self-test errors, auto reboot, blank display, no output, and communication errors. 2015.12.15
66319B Modification Recommended 66319B-09 Power-On Self test Errors, Auto reboot, Blank display. No output Communication errors. No communication when using the GPIB Interface. 2012.06.17
66319B Modification Recommended 66319B-10 The current versions of test software for the 66319B, 66319D, 66321B & 66321D do not contain a test of the Current Sink as specified in the Performance, Calibration, and Configuration section” of the User’s Guide 2012.09.12
66319B Modification Available 66319B-521-01 Reliability Improvement, GPIB/RS232 Interface 2003.08.04
66319B Modification Recommended 66319B-521-02 Unit Exchange Program 2004.03.18
66319D Modification Recommended 66319D-01B Unit Exchange Program 2001.01.31
66319D Modification Recommended 66319D-02 Fetch: Current? Error 604 2001.05.29
66319D Modification Available 66319D-05 Reliability Improvement. GPIB/RS232 Interface 2003.08.04
66319D Modification Recommended 66319D-06 Unit Exchange Program 2004.03.18
66319D Modification Recommended 66319D-07 On faster computers, when programming over GPIB, a random error will occur. 2005.09.28
66319D Modification Recommended 66319D-08A The unit can exhibit power-on self-test errors, auto reboot, blank display, no output, and communication errors. 2015.12.15
66319D Modification Recommended 66319D-09 Power-On Self test Errors, Auto reboot, Blank display. No output Communication errors. No communication when using the GPIB Interface. 2012.06.17
66319D Modification Recommended 66319D-10 The current versions of test software for the 66319B, 66319D, 66321B & 66321D do not contain a test of the Current Sink as specified in the Performance, Calibration, and Configuration section” of the User’s Guide 2012.09.12
66319D Modification Available 66319D-521-01 Reliability Improvement, GPIB/RS232 Interface 2003.08.04
66319D Modification Recommended 66319D-521-02 Unit Exchange Program 2004.03.18
66321B Modification Recommended 66321B-01B Unit Exchange Program 2001.01.31
66321B Modification Recommended 66321B-02 Fetch: Current? Error 605 2001.05.29
66321B Modification Available 66321B-05 Reliability Improvement, GPIB/RS232 Interface 2003.08.04
66321B Modification Recommended 66321B-06 Unit Exchange Program 2004.03.18
66321B Modification Recommended 66321B-07 On faster computers, when programming over GPIB, a random error will occur. 2005.09.28
66321B Modification Recommended 66321B-08 The unit can exhibit power-on self-test errors, auto reboot, blank display, no output, and communication errors. 2015.12.15
66321B Modification Recommended 66321B-09 Power-On Self test Errors, Auto reboot, Blank display. No output Communication errors. No communication when using the GPIB Interface. 2012.06.17
66321B Modification Recommended 66321B-10 The current versions of test software for the 66319B, 66319D, 66321B & 66321D do not contain a test of the Current Sink as specified in the Performance, Calibration, and Configuration section” of the User’s Guide 2012.09.12
66321B Modification Available 66321B-521-01 Reliability Improvement, GPIB/RS232 Interface 2003.08.04
66321D Modification Recommended 66321D-01B Unit Exchange Program 2001.01.31
66321D Modification Recommended 66321D-02 Fetch: Current? Error 606 2001.05.29
66321D Modification Available 66321D-05 Reliability Improvement, GPIB/RS232 Interface 2003.08.04
66321D Modification Recommended 66321D-06 Unit Exchange Program 2004.03.18
66321D Modification Recommended 66321D-07 On faster computers, when programming over GPIB, a random error will occur. 2005.09.28
66321D Modification Recommended 66321D-08A The unit can exhibit power-on self-test errors, auto reboot, blank display, no output, and communication errors. 2015.12.15
66321D Modification Recommended 66321D-09 Power-On Self test Errors, Auto reboot, Blank display. No output Communication errors. No communication when using the GPIB Interface. 2012.06.17
66321D Modification Recommended 66321D-10 The current versions of test software for the 66319B, 66319D, 66321B & 66321D do not contain a test of the Current Sink as specified in the Performance, Calibration, and Configuration section” of the User’s Guide 2012.09.12
66321D Modification Available 66321D-521-01 Reliability Improvement, GPIB/RS232 Interface 2003.08.04
66332A Modification Recommended 66332A-01 Low range current readback out of specifications 1998.03.01
66332A Modification Recommended 66332A-02A RS232/HP-IB Firmware Hang-ups 1999.08.09
66332A Modification Recommended 66332A-03A Blank Front Panel Display,Unit Dead 1999.08.09
66332A Modification Recommended 66332A-06B Unit Exchange Program 2001.01.31
66332A Modification Recommended 66332A-09 On faster computers, when programming over GPIB, a random error will occur. 2005.09.29
66332A Modification Recommended 66332A-10 There is a possible glitch on the output due to an AC Line sag between 23 VAC to 27 VAC. 2011.01.10
66332A Modification Recommended 66332A-020-01B Unit exchange program 2001.05.22
66332A Modification Recommended 66332A-760-01B Unit exchange program 2001.05.22
70001A Safety 70001A-20-S Possible fire hazard- faulty capacitors 1995.09.30
70004A Information Only 70004A-03A Replacement of keypad keys or retainer spring 1991.12.03
70004A Information Only 70004A-07A Troubleshooting Guide for disk/memory card addressing 1992.03.18
70004A Safety 70004A-08-S Right Side Strap Handle does Not Meet Safety Standards 1992.06.24
70004A Information Only 70004A-13 Reset Programmable Array Logic (PAL) integrated circuit 1994.01.19
70004A Information Only 70004A-14 Modification to prevent Modular System Interface Bus (MSIB) Lockup 1995-07
70004A Safety 70004A-15-S Possible fire hazard- faulty capacitors 1995.09.30
70100A Modification Recommended 70100A-01 Mod to eliminate loose reference oscillator N-type connectors 1997.02.10
70100A Modification Recommended 70100A-03 Modification to eliminate loose battery connections 2001.01.07
70310A Modification Recommended 70310A-05 Modification reduces 6 MHz emissions by approximately 6 dB 1993.12.31
70611A Information Only 70611A-01 Controller board fuse replacement 1992.07.15
70611A Modification Recommended 70611A-02 Rear panel auxiliary indicator wired incorrectly 1998.10.13
70620B Modification Recommended 70620B-01 Modification eliminates residual responses caused by noisy power supply 1993.02.28
70700A Information Only 70700A-01C Information on new firmware 1994.01.04
70703A Modification Recommended 70703A-01 The field replacement mechanical attenuator fail rate is higher than normal for instruments repaired between March 2003 and March 2006 2006.04.25
70908A Modification Recommended 70908A-21 Module Verification Software Modification 1992.12.08
70908A Modification Recommended 70908A-25 Multiplier Power Out Adjustment 1995.12.31
81002FF Safety 81002FF-01-S Potential temperature related safety issue 2001.12.10
81101A Modification Available 81101A-02C New firmware 01.12.01/BIOS 1.30 package available 2005.02.16
81101A Modification Available 81101A-04C New firmware 01.12.01/BIOS 1.30 package available 2005.02.16
81101A Modification Recommended 81101A-06B Intermittent Display Failures 2005.05.08
81104A Modification Available 81104A-01C New firmware 01.12.01/BIOS 1.30 package available 2005.02.16
81104A Modification Available 81104A-03C New firmware 01.12.01/BIOS 1.30 package available 2005.02.16
81104A Modification Recommended 81104A-05B Intermittent Display Failures 2005.05.08
81105A Modification Recommended 81105A-01A Distorted output signal when large duty cycle used 1999.11.28
81110A Modification Available 81110A-01C New firmware 01.12.01/BIOS 1.30 package available 2005.02.16
81110A Modification Available 81110A-03C New firmware 01.12.01 /BIOS 1.30 package available 2005.02.16
81110A Modification Recommended 81110A-05B Intermittient Display Failures 2005.05.08
81111A Modification Recommended 81111A-01A Distorted output signal when large duty cycle used 1999.11.28
81130A Modification Available 81130A-01B Keypad locks during manual operation 2003.02.11
81130A Modification Recommended 81130A-03B Intermittient Display Failures 2005.05.08
81133A Modification Recommended 81133A-01A Control Knob does not work properly. Display starts flickering 2011.02.09
81133A Modification Available 81133A-02 81133/34A Firmware Version 2.95 Update available 2011.12.14
81134A Modification Recommended 81134A-01A Control Knob does not work properly. Display starts flickering 2011.02.09
81134A Modification Available 81134A-02 81133/34A Firmware Version 2.95 Update available 2011.12.14
81141A Priority Safety 81141A-01-S Possible Fire Hazard 2007.08.08
81141A Safety 81141A-01A-S POSSIBLE FIRE HAZARD. There is an unlikely possibility of an instrument catching fire due to a shortcircuit 2012.12.11
81142A Safety 81142A-01A-S POSSIBLE FIRE HAZARD. There is an unlikely possibility of an instrument catching fire due to a shortcircuit 2012.12.11
81150A Modification Recommended 81150A-01 Starting in August 2007 wrong SMT fuses were loaded on PCA of the E8305A. 2008.09.16
81150A Modification Recommended 81150A-08A Some shipped units have wrong entries in the internal Calibration Table (Calibration data) for three parameters, and could therefore fail Calibration (Performance Verification) in the service center. Please send back to the factory the affected units for recalibration! Do not repair these units! 2010.12.09
81150A Modification Recommended 81150A-11 Potential issue with duplicate MAC address 2022.10.31
81160A Modification Recommended 81160A-02 Potential issue with duplicate MAC address 2022.10.31
81250A Safety 81250A-01-S The power adapters need to be replaced by safety compliant extension cords and country specific power cords 2007.02.07
81250A Safety 81250A-02-S Dell informed Agilent that certain Dell Notebook batteries supplied with ParBERT systems might overheat and potentially catch fire. 2009.03.15
81618A Modification Recommended 81618A-01 Current peaks at turn-on might cause the coil to melt. TEC setting failure. 2002.09.02
81619A Modification Recommended 81619A-01 Current peaks at turn-on might cause the coil to melt. TEC settings failure 2002.09.02
81640A Modification Available 8164A-05 81640A/81680A Power Repeatability in Fast Sweep Mode 2000.06.30
81662A Modification Recommended 81662A-01 Specification were enhanced for DFB lasers, old DFBs need firmware revision >3.0 to keep enhanced specification. 2002.02.25
81663A Modification Recommended 81663A-01 Specification were enhanced for DFB lasers, old DFBs need firmware revision >3.0 to keep enhanced specification. 2002.02.25
81940A Modification Available 81940A-01 Firmware update to fix possible wavelength offset. 2004.11.16
81949A Modification Available 81949A-01 Firmware update to fix possible wavelength offset. 2004.11.22
81980A Modification Available 81980A-01 Firmware update to fix possible wavelength offset. 2004.11.22
81989A Modification Available 81989A-01 Firmware update to fix possible wavelength offset 2004.11.22
83220A Priority Safety 83220A-03-S Incorrect value of line fuse fitted, combined with the failure of acomponent in the power supply secondary rectifier circuits, maycreate a fire hazard. 1999.04.30
83220A Safety 83220A-04-S Possible Shock Hazard, return to Agilent for Electrical safety (hi-pot) test, earth continuity test, and dielectric voltage (flash test) 2000.01.31
83220E Safety 83220E-04-S component in the power supply secondary rectifier circuits, may 2000.01.31
83220E Priority Safety 83220E-03-S Incorrect value of line fuse fitted, combined with the failure of acomponent in the power supply secondary rectifier circuits, maycreate a fire hazard. 1999.04.30
83491A Modification Recommended 83491A-01 “Module not recognized” error message 2022.02.05
83620A Modification Recommended 83620A-02 Modification to A38 modulators to prevent oscillation 1997.02.10
83620B Modification Recommended 83620B-M71 Tightening torque on p/n 08673-60040 APC 3.5mm(m)to(f) connector 1999.01.31
83621B Modification Recommended 83621B-M71 Tightening torque on p/n 08673-60040 APC 3.5mm(m)to(f) connector 1999.01.31
83622B Modification Recommended 83622B-M71 Tightening torque on p/n 08673-60040 APC 3.5mm(m)to(f) connector 1999.01.31
83623B Modification Recommended 83623B-M71 Tightening torque on p/n 08673-60040 APC 3.5mm(m)to(f) connector 1999.01.31
83623L Modification Recommended 83623L-M71 Tightening torque on p/n 08673-60040 APC 3.5mm(m)to(f) connector 1999.01.31
83624B Modification Recommended 83624B-M71 Tightening torque on p/n 08673-60040 APC 3.5mm(m)to(f) connector 1999.01.31
83630B Modification Recommended 83630B-M71 Tightening torque on p/n 08673-60040 APC 3.5mm(m)to(f) connector 1999.01.31
83630L Modification Recommended 83630L-M71 Tightening torque on p/n 08673-60040 APC 3.5mm(m)to(f) connector 1999.01.31
83631B Modification Recommended 83631B-M71 Tightening torque on p/n 08673-60040 APC 3.5mm(m)to(f) connector 1999.01.31
83731B Modification Recommended 83731B-M71 Tightening torque on p/n 08673-60040 APC 3.5mm(m)to(f) connector 1999.01.31
83732B Modification Recommended 83732B-M71 Tightening torque on p/n 08673-60040 APC 3.5mm(m)to(f) connector 1999.01.31
83751A Modification Recommended 83751A-M71 Tightening torque on p/n 08673-60040 APC 3.5mm(m)to(f) connector 1999.01.31
83751B Modification Recommended 83751B-M71 Tightening torque on p/n 08673-60040 APC 3.5mm(m)to(f) connector 1999.01.31
83752A Modification Recommended 83752A-01 Inspection and replmnt of rubber air dam attached to fan 1996.03.14
83752A Modification Recommended 83752A-M71 Tightening torque on p/n 08673-60040 APC 3.5mm(m)to(f) connector 1999.01.31
83752B Modification Recommended 83752B-M71 Tightening torque on p/n 08673-60040 APC 3.5mm(m)to(f) connector 1999.01.31
85025D Modification Available 85025D-01 Connector Repair Kits for the Agilent 85025D and 85025E Detectors (Agilent Kit Part Numbers 85025-60026 and 85025-60027) 2013-12
85025E Modification Available 85025E-01 Connector Repair Kits for the Agilent 85025D and 85025E Detectors (Agilent Kit Part Numbers 85025-60026 and 85025-60027) 2013-12
85102B Modification Available 85102B-01 New J1 Molex connector on the old A26 Rectifier Board 1999.08.25
85106C Modification Recommended 85106C-01 Modification increases RF source voltage to improve performance 1992.03.31
85110A Modification Recommended 85110A-01 D.C. Return Upgrade Kit 1995.09.30
85110A Safety 85110A-02A-S Rear panel fan cutout and fan guard allow accessibility of fan blades to an IEC 61010 type test finger. 2007.05.09
85110L Modification Recommended 85110L-01 D.C. Return Upgrade Kit 1995.09.30
85110L Safety 85110L-02A-S Rear panel fan cutout and fan guard allow accessibility of fan blades to an IEC 61010 type test finger. 2007.05.09
85301B Modification Recommended 85301B-02 Performance Software 1999.10.31
85301C Modification Recommended 85301C-02 Performance Software 1999.10.31
85629B Modification Recommended 85629B-08 Modified YTO adjustment 1992.05.31
85650A Modification Recommended 85650A-1 PREVENTING SPECTRUM ANALYZER ATTENUATOR DAMAGE WHEN PERFORMING CONDUCTED EMI MEASUREMENTS 1981-08
85942A Safety 85942A-01-S Possible safety hazard 1995.12.31
85942A Priority Safety 85942A-02-S Lack of instrument earth/ground, combined with possible detachmentof internal line module wires due to manufacturing defect, 1996.05.31
85960B Modification Recommended 85960B-1201 Noise at low end of Sweep 2002.01.10
85961B Modification Recommended 85961B-1201 Noise at low end of Sweep 2002.01.10
85962A Modification Recommended 85962A-1201 Noise at low end of Sweep 2002.01.10
85963A Modification Recommended 85963A-1201 Noise at low end of Sweep 2002.01.10
86030A Modification Recommended 86030A-01 Software upgrade adds remote programming capability to system 2001.11.28
86030A Modification Available 86030A-02 Cleaning the controller fan filter will increase system reliability 2002.05.29
86030A Modification Available 86030A-03 Characterize a customer's verification device, (83440D), following Lightwave Test Set, (86032A), factory repair or calibration 2002.06.23
86100C Modification Recommended 86100C-02 New part number for stainless steel anchor on DCA mainframe. 2004.12.30
86100C Modification Available 86100C-04 Add diode limiter to prevent counter assembly failures 2006.08.29
86100C Modification Recommended 86100C-10B Low Voltage part loaded in 5 V application causes performance to degrade over time. Inspect for low voltage part and replace. 2010.01.26
86100C Modification Recommended 86100C-12A Motherboard board mounting modification improves product reliability related to boot up issues. 2010.04.15
86100D Information Only 86100D-08 Choose correct 86100D SSD (Solid State Drive) based on installed CPU and Windows OS eligibility. 2015.10.23
86100D Modification Recommended 86100D-09A DCA-X Mainframe power supply may be prone to early failure under certain conditions. 2017.01.04
86100D Modification Available 86100D-11A An upgrade to Windows 10 is available for all 86100D DCA-X mainframes. Units with older CPU version will also require a CPU upgrade. See text below for determining CPU version. 2020.08.30
86100D Modification Available 86100D-11B An upgrade to Windows 10 is available for all 86100D DCA-X mainframes. Units with older CPU version will also require a CPU upgrade. See text for determining CPU version. 2023.06.01
86105C Modification Available 86105C-03 The 86105C has the ability to store Extinction Ratio Correction Factors (ERCF) to enhance the accuracy of extinction ratio measurements. Agilent Service centers now have the ability to calculate and store custom ERCF values for individual 86105C modules to enhance the accuracy and repeatability of ER measurements. 2009.07.27
86106B Modification Recommended 86106B-01 Memory Error in module 2004.01.28
86107A Modification Recommended 86107A-01 Memory Error in module 2004.01.28
86108B Modification Recommended 86108B-01 Install option JSA on all 86108B modules during regular service. 2019.07.22
86144B Modification Recommended 86144B-01 Potential servo board failure on 86144B 2003.03.24
86146B Modification Recommended 86146B-01 Potential servo board failures on 86146B 2003.03.24
86290A Information Only 86290A-5 FREQUENCY TRACKING ADJUSTMENT 1982-01
86290B Information Only 86290B-3 FREQUENCY TRACKING ADJUSTMENT 1982-01
86290C Information Only 86290C-2 FREQUENCY TRACKING ADJUSTMENT 1982-01
86790B Modification Recommended 86790B-01 Modification eliminates ground bounce and clock line reflections 1992.09.30
86790B Modification Recommended 86790B-02 Firmware history and upgrade procedures 1993.03.31
87421A Safety 87421A-01-S A potential shock hazard is present if the rivets fastening the AC power input module cause the plastic case to fracture. 1992.02.20
AE6943A Modification Recommended AE6943A-01 Potential characteristic impedance differential mode (CIDM) measurement failure on AE6943A 2023.07.12
B1500A Modification Recommended B1500A-01 Mouse cursor moves to edge against operator move to another location 2006.05.08
B1500A Modification Recommended B1500A-05 Unexpected noise output from HRSMU/MPSUM on specified condition 2009.03.30
B1500A Modification Available B1500A-07 Keysight B1500A series mainframe upgrade kit is available to migrate from Windows Embedded XP/7 to Windows 10. In addition to the Windows OS upgrade, it renews your mainframe PC platform to the latest configuration. 2019.05.07
B1505A Safety B1505A-01B-S There is a possibility of an electrical shock hazard. 2019.02.12
B1505A Modification Recommended B1505A-02 Cannot recognize the peripheral product; N1268A Ultra High Voltage Expander and when it is connected, the communication error (timeout) occurs. 2018.08.13
B1505A Modification Available B1505A-03 Keysight B1500A series mainframe upgrade kit is available to migrate from Windows Embedded XP/7 to Windows 10. In addition to the Windows OS upgrade, it renews your mainframe PC platform to the latest configuration. 2019.05.07
B1506A Modification Available B1506A-01 Keysight B1500A series mainframe upgrade kit is available to migrate from Windows Embedded XP/7 to Windows 10. In addition to the Windows OS upgrade, it renews your mainframe PC platform to the latest configuration. 2019.05.07
B2901A Modification Recommended B2901A-01 Factory Pre-shipment Adjustment/Calibration Issue 2013.06.20
B2901A Modification Recommended B2901A-02 May have an internal communication error at the power on or when updating the firmware to the revisions described in this service note. 2018.09.17
B2901A Modification Recommended B2901A-03 When a repair is made by replacing the SMU board, the maximum sweep point is limited to 2,500 even if it was 100,000 before repair, and the board revision code needs to be changed to have 100,000 sweep points. 2020.03.12
B2901B Modification Recommended B2901B-01 The LAN MAC address assigned to B2901B may have a duplicate with the one assigned to 33502A. 2021.12.01
B2901B Modification Recommended B2901B-03 Distortion occurs in the output waveform when creating a sweep waveform. 2024.03.25
B2901BL Modification Recommended B2901BL-01 The LAN MAC address assigned to B2901BL may have a duplicate with the one assigned to 33502A. 2021.12.01
B2901BL Modification Recommended B2901BL-03 Distortion occurs in the output waveform when creating a sweep waveform. 2024.03.25
B2902A Modification Recommended B2902A-01 Factory Pre-shipment Adjustment/Calibration Issue 2013.06.20
B2902A Modification Recommended B2902A-02 May have an internal communication error at the power on or when updating the firmware to the revisions described in this service note. 2018.09.17
B2902A Modification Recommended B2902A-03 When a repair is made by replacing the SMU board, the maximum sweep point is limited to 2,500 even if it was 100,000 before repair, and the board revision code needs to be changed to have 100,000 sweep points. 2020.03.12
B2902B Modification Recommended B2902B-01 The LAN MAC address assigned to B2902B may have a duplicate with the one assigned to 33502A. 2021.12.01
B2902B Modification Recommended B2902B-03 Distortion occurs in the output waveform when creating a sweep waveform. 2024.03.25
B2910BL Modification Recommended B2910BL-01 The LAN MAC address assigned to B2910BL may have a duplicate with the one assigned to 33502A. 2021.12.01
B2910BL Modification Recommended B2910BL-03 Distortion occurs in the output waveform when creating a sweep waveform. 2024.03.25
B2911A Modification Recommended B2911A-01 Factory Pre-shipment Adjustment/Calibration Issue 2013.06.20
B2911A Modification Recommended B2911A-02 May have an internal communication error at the power on or when updating the firmware to the revisions described in this service note. 2019.09.25
B2911A Modification Recommended B2911A-03 When a repair is made by replacing the SMU board, the maximum sweep point is limited to 2,500 even if it was 100,000 before repair, and the board revision code needs to be changed to have 100,000 sweep points. 2020.03.12
B2911B Modification Recommended B2911B-01 The LAN MAC address assigned to B2911B may have a duplicate with the one assigned to 33502A. 2021.12.01
B2911B Modification Recommended B2911B-03 Distortion occurs in the output waveform when creating a sweep waveform. 2024.03.25
B2912A Modification Recommended B2912A-01 Factory Pre-shipment Adjustment/Calibration Issue 2013.06.20
B2912A Modification Recommended B2912A-02 May have an internal communication error at the power on or when updating the firmware to the revisions described in this service note. 2018.09.17
B2912A Modification Recommended B2912A-03 When a repair is made by replacing the SMU board, the maximum sweep point is limited to 2,500 even if it was 100,000 before repair, and the board revision code needs to be changed to have 100,000 sweep points. 2020.03.12
B2912B Modification Recommended B2912B-01 The LAN MAC address assigned to B2912B may have a duplicate with the one assigned to 33502A. 2021.12.01
B2912B Modification Recommended B2912B-03 Distortion occurs in the output waveform when creating a sweep waveform. 2024.03.25
B2961A Modification Recommended B2961A-01 Factory Pre-shipment Adjustment/Calibration Issue 2013.06.20
B2961A Modification Recommended B2961A-02 May have an internal communication error at the power on or when updating the firmware to the revisions described in this service note. 2018.09.17
B2961B Modification Recommended B2961B-01 The LAN MAC address assigned to B2961B may have a duplicate with the one assigned to 33502A. 2021.12.01
B2961B Modification Recommended B2961B-02 Distortion occurs in the output waveform when creating a sweep waveform. 2024.03.25
B2962A Modification Recommended B2962A-01 Factory Pre-shipment Adjustment/Calibration Issue 2013.06.20
B2962A Modification Recommended B2962A-02 May have an internal communication error at the power on or when updating the firmware to the revisions described in this service note. 2018.09.17
B2962B Modification Recommended B2962B-01 The LAN MAC address assigned to B2962B may have a duplicate with the one assigned to 33502A. 2021.12.01
B2962B Modification Recommended B2962B-02 Distortion occurs in the output waveform when creating a sweep waveform. 2024.03.25
B2981B Modification Recommended B2981B-01 The LAN MAC address assigned to B2981B may have a duplicate with the one assigned to 33502A. 2021.12.01
B2983B Modification Recommended B2983B-01 The LAN MAC address assigned to B2983B may have a duplicate with the one assigned to 33502A. 2021.12.01
B2985B Modification Recommended B2985B-01 The LAN MAC address assigned to B2985B may have a duplicate with the one assigned to 33502A. 2021.12.01
B2987B Modification Recommended B2987B-01 The LAN MAC address assigned to B2987B may have a duplicate with the one assigned to 33502A. 2021.12.01
CX1101A Modification Available CX1101A-01 CX1101A, a sensor that can be used with CX3322A/CX3324A, can have a new 500 kHz Low Pass Filter mode by performing both updates. 2019.02.12
CX3322A Modification Available CX3322A-01 CX1101A, a sensor that can be used with CX3322A, can have a new 500 kHz Low Pass Filter mode by performing both updates. 2019.02.12
CX3322A Modification Recommended CX3322A-02 The CX3322A could have DC voltage measurement deviation 2023.03.19
CX3324A Modification Available CX3324A-01 CX1101A, a sensor that can be used with CX3324A, can be updated to have 500 kHz Low Pass Filter mode by performing both updates: 2019.02.12
CX3324A Modification Recommended CX3324A-02 The CX3324A could have DC voltage measurement deviation 2023.03.19
DAQ970A Modification Recommended DAQ970A-01 DAQM909A when used in DAQ970A serial number MY58001798 and lower may exhibit higher-than-normal radiated emissions 2020.01.28
DAQ970A Information Only DAQ970A-04 Removal of J-Type Thermocouple and screwdriver as a standard shipped accessory. 2023.04.10
DAQ970A Information Only DAQ970A-04A Removal of J-Type Thermocouple and screwdriver as a standard shipped accessory. 2023.04.10
DAQ973A Information Only DAQ973A-02 Removal of J-Type Thermocouple and screwdriver as a standard shipped accessory. 2023.04.10
DAQ973A Information Only DAQ973A-02A Removal of J-Type Thermocouple and screwdriver as a standard shipped accessory. 2023.04.10
DAQM900A Modification Recommended DAQM900A-01A Possible tightness when unplugging the module from DAQ970A mainframe 2019.07.17
DAQM901A Modification Recommended DAQM901A-01A Possible tightness when unplugging the module from DAQ970A mainframe 2019.07.17
DAQM902A Modification Recommended DAQM902A-01A Possible tightness when unplugging the module from DAQ970A mainframe 2019.07.17
DAQM903A Modification Recommended DAQM903A-01A Possible tightness when unplugging the module from DAQ970A mainframe 2019.07.17
DSA90254A Modification Recommended DSA90254A-02 Acquisition boards which are loaded into a different back board slot than they were factory calibrated in will fail the filter user calibration because the calibration software cannot locate the filter factory calibration data. 2008.09.04
DSA90254A Modification Recommended DSA90254A-04 Crackling noise coming from rear of scope. 2009.04.13
DSA90254A Modification Recommended DSA90254A-06A ICCY is characterized by the intermittent failure of Windows to recognize the Infiniium acquisition hardware on the PCIe bus after a Windows boot process, resulting in the “Infiniium cannot communicate with the acquisition hardware. 2013.10.01
DSA90254A Modification Recommended DSA90254A-07 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the horizontal position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSA90404A Modification Recommended DSA90404A-02 Acquisition boards which are loaded into a different back board slot than they were factory calibrated in will fail the filter user calibration because the calibration software cannot locate the filter factory calibration data. 2008.09.04
DSA90404A Modification Recommended DSA90404A-04 Crackling noise coming from rear of scope. 2009.04.13
DSA90404A Modification Recommended DSA90404A-06A ICCY is characterized by the intermittent failure of Windows to recognize the Infiniium acquisition hardware on the PCIe bus after a Windows boot process, resulting in the “Infiniium cannot communicate with the acquisition hardware. 2013.10.01
DSA90404A Modification Recommended DSA90404A-07 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the horizontal position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSA90604A Modification Recommended DSA90604A-02 Acquisition boards which are loaded into a different back board slot than they were factory calibrated in will fail the filter user calibration because the calibration software cannot locate the filter factory calibration data. 2008.09.04
DSA90604A Modification Recommended DSA90604A-04 Crackling noise coming from rear of scope. 2009.04.13
DSA90604A Modification Recommended DSA90604A-06A ICCY is characterized by the intermittent failure of Windows to recognize the Infiniium acquisition hardware on the PCIe bus after a Windows boot process, resulting in the “Infiniium cannot communicate with the acquisition hardware. 2013.10.01
DSA90604A Modification Recommended DSA90604A-07 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the horizontal position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSA90804A Modification Recommended DSA90804A-02 Acquisition boards which are loaded into a different back board slot than they were factory calibrated in will fail the filter user calibration because the calibration software cannot locate the filter factory calibration data. 2008.09.04
DSA90804A Modification Recommended DSA90804A-04 Crackling noise coming from rear of scope. 2009.04.13
DSA90804A Modification Recommended DSA90804A-06A ICCY is characterized by the intermittent failure of Windows to recognize the Infiniium acquisition hardware on the PCIe bus after a Windows boot process, resulting in the “Infiniium cannot communicate with the acquisition hardware. 2013.10.01
DSA90804A Modification Recommended DSA90804A-07 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the horizontal position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSA91204A Modification Recommended DSA91204A-02 Acquisition boards which are loaded into a different back board slot than they were factory calibrated in will fail the filter user calibration because the calibration software cannot locate the filter factory calibration data. 2008.09.04
DSA91204A Modification Recommended DSA91204A-04 Crackling noise coming from rear of scope. 2009.04.13
DSA91204A Modification Recommended DSA91204A-06A ICCY is characterized by the intermittent failure of Windows to recognize the Infiniium acquisition hardware on the PCIe bus after a Windows boot process, resulting in the “Infiniium cannot communicate with the acquisition hardware. 2013.10.01
DSA91204A Modification Recommended DSA91204A-07 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the horizontal position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSA91304A Modification Recommended DSA91304A-02 Acquisition boards which are loaded into a different back board slot than they were factory calibrated in will fail the filter user calibration because the calibration software cannot locate the filter factory calibration data. 2008.09.04
DSA91304A Modification Recommended DSA91304A-04 Crackling noise coming from rear of scope. 2009.04.13
DSA91304A Modification Recommended DSA91304A-06A ICCY is characterized by the intermittent failure of Windows to recognize the Infiniium acquisition hardware on the PCIe bus after a Windows boot process, resulting in the “Infiniium cannot communicate with the acquisition hardware. 2013.10.01
DSA91304A Modification Recommended DSA91304A-07 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the horizontal position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSAX91604A Modification Recommended DSAX91604A-03 Front panel connector may not offer a good ground connection for probes 2011.08.04
DSAX92004A Modification Recommended DSAX92004A-03 Front panel connector may not offer a good ground connection for probes 2011.08.04
DSAX92504A Modification Recommended DSAX92504A-03 Front panel connector may not offer a good ground connection for probes 2011.08.04
DSAX92804A Modification Recommended DSAX92804A-03 Front panel connector may not offer a good ground connection for probes 2011.08.04
DSAX93204A Modification Recommended DSAX93204A-03 Front panel connector may not offer a good ground connection for probes 2011.08.04
DSAX95004Q Modification Recommended DSAX95004Q-01 Using the Real Channels with differential mode on and or Precision Probe on, causes the Main FPGA to dip and data fryers are observed due to voltage variations. 2014.08.05
DSAX96204Q Modification Recommended DSAX96204Q-01 Using the Real Channels with differential mode on and or Precision Probe on, causes the Main FPGA to dip and data fryers are observed due to voltage variations. 2014.08.05
DSO1052B Modification Recommended DSO1052B-02A A small number of DSO1052B scopes exhibit a behavior in which the display will turn off 5-10 minutes after powering the scope on. This poses no danger to a user. 2016.03.30
DSO1072B Modification Recommended DSO1072B-02A A small number of DSO1072B scopes exhibit a behavior in which the display will turn off 5-10 minutes after powering the scope on. This poses no danger to a user. 2016.03.30
DSO1102B Modification Recommended DSO1102B-02A A small number of DSO1102B scopes exhibit a behavior in which the display will turn off 5-10 minutes after powering the scope on. This poses no danger to a user 2016.03.30
DSO1152B Modification Recommended DSO1152B-02A A small number of DSO1152B scopes exhibit a behavior in which the display will turn off 5-10 minutes after powering the scope on. This poses no danger to a user. 2016.03.30
DSO6014L Safety DSO6014L-01-S A Foam Filled EMI Gasket was used in the units listed above. It was implemented in a total of 52 6000L units starting in Nov’2019 with SN: MY5945xxxx in response to a change in EMI qualification. It has been found that the Foam Filled EMI Gasket, if placed incorrectly, may not meet the safety creepage and clearance requirements and could cause a safety risk to the user. 2020.10.15
DSO6032A Priority Safety DSO6032A-01A-S Installing dielectric insulator to prevent possible shock hazard. 2007.03.19
DSO6034A Priority Safety DSO6034A-01A-S Installing dielectric insulator to prevent possible shock hazard. 2007.03.19
DSO6052A Priority Safety DSO6052A-01A-S Installing dielectric insulator to prevent possible shock hazard. 2007.03.19
DSO6054A Priority Safety DSO6054A-01A-S Installing dielectric insulator to prevent possible shock hazard. 2007.03.19
DSO6054L Safety DSO6054L-01-S A Foam Filled EMI Gasket was used in the units listed above. It was implemented in a total of 52 6000L units starting in Nov’2019 with SN: MY5945xxxx in response to a change in EMI qualification. It has been found that the Foam Filled EMI Gasket, if placed incorrectly, may not meet the safety creepage and clearance requirements and could cause a safety risk to the user. 2020.10.15
DSO6104A Priority Safety DSO6104A-01A-S Installing dielectric insulator to prevent possible shock hazard. 2007.03.19
DSO6104L Safety DSO6104L-01-S A Foam Filled EMI Gasket was used in the units listed above. It was implemented in a total of 52 6000L units starting in Nov’2019 with SN: MY5945xxxx in response to a change in EMI qualification. It has been found that the Foam Filled EMI Gasket, if placed incorrectly, may not meet the safety creepage and clearance requirements and could cause a safety risk to the user. 2020.10.15
DSO7032A Modification Recommended DSO7032A-01 New Cap-Strap Handles are replacing older ones that might crack with use. 2008.09.30
DSO7034A Modification Recommended DSO7034A-01 New Cap-Strap Handles are replacing older ones that might crack with use. 2008.09.30
DSO7052A Modification Recommended DSO7052A-01 New Cap-Strap Handles are replacing older ones that might crack with use. 2008.09.30
DSO7054A Modification Recommended DSO7054A-01 New Cap-Strap Handles are replacing older ones that might crack with use. 2008.09.30
DSO7104A Modification Recommended DSO7104A-01 New Cap-Strap Handles are replacing older ones that might crack with use. 2008.09.30
DSO9024H Modification Recommended DSO9024H-01 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the channel 2 position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSO9054H Modification Recommended DSO9054H-01 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the channel 2 position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSO9064A Modification Recommended DSO9064A-01A Intermittent power failure on some 9000 series units. 2012.02.02
DSO9064A Modification Recommended DSO9064A-03 Intermittent shutdown issue is J124 connector and 12 volt Bulk power cable connection problem. 2012.09.12
DSO9104A Modification Recommended DSO9104A-01 Rev 005 acquisiton boards should be replaced 2010.02.10
DSO9104A Modification Recommended DSO9104A-03 Repair for Windows “Power surge on hub” message 2011.04.11
DSO9104A Modification Recommended DSO9104A-05 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the channel 2 position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSO9104H Modification Recommended DSO9104H-01 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the channel 2 position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSO9204H Modification Recommended DSO9204H-01 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the channel 2 position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSO9254A Modification Recommended DSO9254A-01 Rev 005 acquisiton boards should be replaced 2010.02.10
DSO9254A Modification Recommended DSO9254A-03 Repair for Windows “Power surge on hub” message 2011.04.11
DSO9254A Modification Recommended DSO9254A-05 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the channel 2 position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSO9404A Modification Recommended DSO9404A-01 Rev 005 acquisiton boards should be replaced 2010.02.10
DSO9404A Modification Recommended DSO9404A-03 Repair for Windows “Power surge on hub” message 2011.04.11
DSO9404A Modification Recommended DSO9404A-05 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the channel 2 position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSO80204B Modification Recommended DSO80204B-01B Unit fails to identify CDROM drive. Not a saftey concern.Recommend the Sub-Asembly rather then the Power Supply because it was not set up orginally for service. 2007.07.10
DSO80304B Modification Recommended DSO80304B-01B Unit fails to identify CDROM drive. Not a saftey concern.Recommend the Sub-Asembly rather then the Power Supply because it was not set up orginally for service. 2007.07.10
DSO80404B Modification Recommended DSO80404B-01B Unit fails to identify CDROM drive. Not a saftey concern.Recommend the Sub-Asembly rather then the Power Supply because it was not set up orginally for service. 2007.07.10
DSO80604B Modification Recommended DSO80604B-01B Unit fails to identify CDROM drive. Not a saftey concern.Recommend the Sub-Asembly rather then the Power Supply because it was not set up orginally for service. 2007.07.10
DSO81004B Modification Recommended DSO81004B-01B Unit fails to identify CDROM drive. Not a saftey concern.Recommend the Sub-Asembly rather then the Power Supply because it was not set up orginally for service. 2007.07.10
DSO81204B Modification Recommended DSO81204B-01B Unit fails to identify CDROM drive. Not a saftey concern.Recommend the Sub-Asembly rather then the Power Supply because it was not set up orginally for service. 2007.07.10
DSO81304B Modification Recommended DSO81304B-01B Unit fails to identify CDROM drive. Not a saftey concern.Recommend the Sub-Asembly rather then the Power Supply because it was not set up orginally for service. 2007.07.10
DSO90254A Modification Recommended DSO90254A-02 Acquisition boards which are loaded into a different back board slot than they were factory calibrated in will fail the filter user calibration because the calibration software cannot locate the filter factory calibration data. 2008.09.04
DSO90254A Modification Recommended DSO90254A-04 Crackling noise coming from rear of scope. 2009.04.13
DSO90254A Modification Recommended DSO90254A-06A ICCY is characterized by the intermittent failure of Windows to recognize the Infiniium acquisition hardware on the PCIe bus after a Windows boot process, resulting in the “Infiniium cannot communicate with the acquisition hardware. 2013.10.01
DSO90254A Modification Recommended DSO90254A-07 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the horizontal position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSO90404A Modification Recommended DSO90404A-02 Acquisition boards which are loaded into a different back board slot than they were factory calibrated in will fail the filter user calibration because the calibration software cannot locate the filter factory calibration data. 2008.09.04
DSO90404A Modification Recommended DSO90404A-04 Crackling noise coming from rear of scope. 2009.04.13
DSO90404A Modification Recommended DSO90404A-06A ICCY is characterized by the intermittent failure of Windows to recognize the Infiniium acquisition hardware on the PCIe bus after a Windows boot process, resulting in the “Infiniium cannot communicate with the acquisition hardware. 2013.10.01
DSO90404A Modification Recommended DSO90404A-07 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the horizontal position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSO90604A Modification Recommended DSO90604A-02 Acquisition boards which are loaded into a different back board slot than they were factory calibrated in will fail the filter user calibration because the calibration software cannot locate the filter factory calibration data. 2008.09.04
DSO90604A Modification Recommended DSO90604A-04 Crackling noise coming from rear of scope. 2009.04.13
DSO90604A Modification Recommended DSO90604A-06A ICCY is characterized by the intermittent failure of Windows to recognize the Infiniium acquisition hardware on the PCIe bus after a Windows boot process, resulting in the “Infiniium cannot communicate with the acquisition hardware. 2013.10.01
DSO90604A Modification Recommended DSO90604A-07 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the horizontal position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSO90804A Modification Recommended DSO90804A-02 Acquisition boards which are loaded into a different back board slot than they were factory calibrated in will fail the filter user calibration because the calibration software cannot locate the filter factory calibration data. 2008.09.04
DSO90804A Modification Recommended DSO90804A-04 Crackling noise coming from rear of scope. 2009.04.13
DSO90804A Modification Recommended DSO90804A-06A ICCY is characterized by the intermittent failure of Windows to recognize the Infiniium acquisition hardware on the PCIe bus after a Windows boot process, resulting in the “Infiniium cannot communicate with the acquisition hardware. 2013.10.01
DSO90804A Modification Recommended DSO90804A-07 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the horizontal position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSO91204A Modification Recommended DSO91204A-02 Acquisition boards which are loaded into a different back board slot than they were factory calibrated in will fail the filter user calibration because the calibration software cannot locate the filter factory calibration data. 2008.09.04
DSO91204A Modification Recommended DSO91204A-04 Crackling noise coming from rear of scope. 2009.04.13
DSO91204A Modification Recommended DSO91204A-06A ICCY is characterized by the intermittent failure of Windows to recognize the Infiniium acquisition hardware on the PCIe bus after a Windows boot process, resulting in the “Infiniium cannot communicate with the acquisition hardware. 2013.10.01
DSO91204A Modification Recommended DSO91204A-07 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the horizontal position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSO91304A Modification Recommended DSO91304A-02 Acquisition boards which are loaded into a different back board slot than they were factory calibrated in will fail the filter user calibration because the calibration software cannot locate the filter factory calibration data. 2008.09.04
DSO91304A Modification Recommended DSO91304A-04 Crackling noise coming from rear of scope. 2009.04.13
DSO91304A Modification Recommended DSO91304A-06A ICCY is characterized by the intermittent failure of Windows to recognize the Infiniium acquisition hardware on the PCIe bus after a Windows boot process, resulting in the “Infiniium cannot communicate with the acquisition hardware. 2013.10.01
DSO91304A Modification Recommended DSO91304A-07 There has been reported a failure seen on 90000A front panels termed as “Unresponsive knobs”. This issue is usually observed on the horizontal position knob. Cycling the Infiniium application off and then on most often restarts the knobs operation again. 2013.07.23
DSOS054A Modification Recommended DSOS054A-02C Under certain circumstances a PLL2 error may occur on the S-series products. 2019.05.09
DSOS054A Modification Recommended DSOS054A-02D Under certain circumstances a PLL2 error may occur on the S-series products. 2019.10.14
DSOS054A Modification Recommended DSOS054A-02E Under certain circumstances a PLL2 error may occur on the S-series products. 2023.03.19
DSOS054A Modification Recommended DSOS054A-02F Under certain circumstances a PLL2 error may occur on the S-series products. 2024.03.17
DSOS054A Modification Recommended DSOS054A-05 A pair of resistors were placed in the wrong location on the VCO circuitry. 2018.06.07
DSOS104A Modification Recommended DSOS104A-03C Under certain circumstances a PLL2 error may occur on the S-series products. 2019.05.09
DSOS104A Modification Recommended DSOS104A-03D Under certain circumstances a PLL2 error may occur on the S-series products. 2019.10.14
DSOS104A Modification Recommended DSOS104A-03E Under certain circumstances a PLL2 error may occur on the S-series products. 2023.03.19
DSOS104A Modification Recommended DSOS104A-03F Under certain circumstances a PLL2 error may occur on the S-series products. 2024.03.17
DSOS104A Modification Recommended DSOS104A-05 A pair of resistors were placed in the wrong location on the VCO circuitry. 2018.06.07
DSOS204A Modification Recommended DSOS204A-02B Under certain circumstances a PLL2 error may occur on the S-series products. 2019.03.05
DSOS204A Modification Recommended DSOS204A-02C Under certain circumstances a PLL2 error may occur on the S-series products. 2019.10.14
DSOS204A Modification Recommended DSOS204A-02D Under certain circumstances a PLL2 error may occur on the S-series products. 2023.03.19
DSOS204A Modification Recommended DSOS204A-02E Under certain circumstances a PLL2 error may occur on the S-series products. 2024.03.17
DSOS204A Modification Recommended DSOS204A-04 A pair of resistors were placed in the wrong location on the VCO circuitry. 2018.06.07
DSOS254A Modification Recommended DSOS254A-03A Under certain circumstances a PLL2 error may occur on the S-series products. 2018.02.07
DSOS254A Modification Recommended DSOS254A-03C Under certain circumstances a PLL2 error may occur on the S-series products. 2019.05.09
DSOS254A Modification Recommended DSOS254A-03D Under certain circumstances a PLL2 error may occur on the S-series products. 2019.10.14
DSOS254A Modification Recommended DSOS254A-03E Under certain circumstances a PLL2 error may occur on the S-series products. 2023.03.19
DSOS254A Modification Recommended DSOS254A-03F Under certain circumstances a PLL2 error may occur on the S-series products. 2024.03.17
DSOS254A Modification Recommended DSOS254A-05 A pair of resistors were placed in the wrong location on the VCO circuitry. 2018.06.07
DSOS404A Modification Recommended DSOS404A-03C Under certain circumstances a PLL2 error may occur on the S-series products. 2019.05.09
DSOS404A Modification Recommended DSOS404A-03D Under certain circumstances a PLL2 error may occur on the S-series products. 2019.10.14
DSOS404A Modification Recommended DSOS404A-03E Under certain circumstances a PLL2 error may occur on the S-series products. 2023.03.19
DSOS404A Modification Recommended DSOS404A-03F Under certain circumstances a PLL2 error may occur on the S-series products. 2024.03.20
DSOS404A Modification Recommended DSOS404A-05 A pair of resistors were placed in the wrong location on the VCO circuitry. 2018.06.07
DSOS604A Modification Recommended DSOS604A-03C Under certain circumstances a PLL2 error may occur on the S-series products. 2019.05.09
DSOS604A Modification Recommended DSOS604A-03D Under certain circumstances a PLL2 error may occur on the S-series products. 2019.10.14
DSOS604A Modification Recommended DSOS604A-03E Under certain circumstances a PLL2 error may occur on the S-series products. 2023.03.19
DSOS604A Modification Recommended DSOS604A-03F Under certain circumstances a PLL2 error may occur on the S-series products. 2024.03.17
DSOS604A Modification Recommended DSOS604A-05 A pair of resistors were placed in the wrong location on the VCO circuitry. 2018.06.07
DSOS804A Modification Recommended DSOS804A-02C Under certain circumstances a PLL2 error may occur on the S-series products. 2019.05.09
DSOS804A Modification Recommended DSOS804A-02D Under certain circumstances a PLL2 error may occur on the S-series products. 2019.10.14
DSOS804A Modification Recommended DSOS804A-02E Under certain circumstances a PLL2 error may occur on the S-series products. 2023.03.19
DSOS804A Modification Recommended DSOS804A-02F Under certain circumstances a PLL2 error may occur on the S-series products. 2024.03.17
DSOS804A Modification Recommended DSOS804A-04 A pair of resistors were placed in the wrong location on the VCO circuitry. 2018.06.07
DSOX2002A Modification Recommended DSOX2002A-03 With the oscilloscope’s power on and while under normal operation the unit emits a hissing noise. 2012.06.22
DSOX2004A Modification Recommended DSOX2004A-03 With the oscilloscope’s power on and while under normal operation the unit emits a hissing noise. 2012.06.22
DSOX2012A Modification Recommended DSOX2012A-03 With the oscilloscope’s power on and while under normal operation the unit emits a hissing noise. 2012.06.22
DSOX2014A Modification Recommended DSOX2014A-03 With the oscilloscope’s power on and while under normal operation the unit emits a hissing noise. 2012.06.22
DSOX2022A Modification Recommended DSOX2022A-03 With the oscilloscope’s power on and while under normal operation the unit emits a hissing noise. 2012.06.22
DSOX2024A Modification Recommended DSOX2024A-03 With the oscilloscope’s power on and while under normal operation the unit emits a hissing noise. 2012.06.22
DSOX3012A Modification Recommended DSOX3012A-03 With the oscilloscope’s power on and while under normal operation the unit emits a hissing noise. 2012.06.22
DSOX3014A Modification Recommended DSOX3014A-03 With the oscilloscope’s power on and while under normal operation the unit emits a hissing noise. 2012.06.22
DSOX3024A Modification Recommended DSOX3024A-03 With the oscilloscope’s power on and while under normal operation the unit emits a hissing noise. 2012.06.22
DSOX3032A Modification Recommended DSOX3032A-01 With the oscilloscope’s power on and while under normal operation the unit emits a hissing noise. 2012.06.22
DSOX3034A Modification Recommended DSOX3034A-01 With the oscilloscope’s power on and while under normal operation the unit emits a hissing noise. 2012.06.22
DSOX3052A Modification Recommended DSOX3052A-01 With the oscilloscope’s power on and while under normal operation the unit emits a hissing noise. 2012.06.22
DSOX3054A Modification Recommended DSOX3054A-01 With the oscilloscope’s power on and while under normal operation the unit emits a hissing noise. 2012.06.22
DSOX4022A Modification Recommended DSOX4022A-01 A replacement of the power supply cover is needed when the cabinet assembly is replaced. 2013.09.03
DSOX4022A Modification Recommended DSOX4022A-02 Update to latest firmware before calibrating 4000 X-Series scope if firmware is 3.11 or lower to improve digital channel performance. 2014.01.21
DSOX4024A Modification Recommended DSOX4024A-01 A replacement of the power supply cover is needed when the cabinet assembly is replaced. 2013.09.03
DSOX4024A Modification Recommended DSOX4024A-02 Update to latest firmware before calibrating 4000 X-Series scope if firmware is 3.11 or lower to improve digital channel performance. 2014.01.21
DSOX4024A Safety DSOX4024A-04-S Over the past month, Keysight observed failures during the Routine Safety Test. Investigation found a recently changed R101 resistor, from a 39K ohm part to a new 47K ohm part is against the printed circuit board ground plane and insulation breakdown may cause a safety concern. This issue is limited to the serial numbers listed above. 2018.12.13
DSOX4032A Modification Recommended DSOX4032A-01 A replacement of the power supply cover is needed when the cabinet assembly is replaced. 2013.09.03
DSOX4032A Modification Recommended DSOX4032A-02 Update to latest firmware before calibrating 4000 X-Series scope if firmware is 3.11 or lower to improve digital channel performance. 2014.01.21
DSOX4034A Modification Recommended DSOX4034A-01 A replacement of the power supply cover is needed when the cabinet assembly is replaced. 2013.09.03
DSOX4034A Modification Recommended DSOX4034A-02 Update to latest firmware before calibrating 4000 X-Series scope if firmware is 3.11 or lower to improve digital channel performance. 2014.01.21
DSOX4034A Safety DSOX4034A-04-S Over the past month, Keysight observed failures during the Routine Safety Test. Investigation found a recently changed R101 resistor, from a 39K ohm part to a new 47K ohm part is against the printed circuit board ground plane and insulation breakdown may cause a safety concern. This issue is limited to the serial numbers listed above. 2018.12.13
DSOX4052A Modification Recommended DSOX4052A-01 A replacement of the power supply cover is needed when the cabinet assembly is replaced. 2013.09.03
DSOX4052A Modification Recommended DSOX4052A-02 Update to latest firmware before calibrating 4000 X-Series scope if firmware is 3.11 or lower to improve digital channel performance. 2014.01.21
DSOX4054A Modification Recommended DSOX4054A-01 A replacement of the power supply cover is needed when the cabinet assembly is replaced. 2013.09.03
DSOX4054A Modification Recommended DSOX4054A-02 Update to latest firmware before calibrating 4000 X-Series scope if firmware is 3.11 or lower to improve digital channel performance. 2014.01.21
DSOX4054A Safety DSOX4054A-04-S Over the past month, Keysight observed failures during the Routine Safety Test. Investigation found a recently changed R101 resistor, from a 39K ohm part to a new 47K ohm part is against the printed circuit board ground plane and insulation breakdown may cause a safety concern. This issue is limited to the serial numbers listed above. 2018.12.13
DSOX4104A Modification Recommended DSOX4104A-01 A replacement of the power supply cover is needed when the cabinet assembly is replaced. 2013.09.03
DSOX4104A Modification Recommended DSOX4104A-02 Update to latest firmware before calibrating 4000 X-Series scope if firmware is 3.11 or lower to improve digital channel performance. 2014.01.21
DSOX4104A Safety DSOX4104A-04-S Over the past month, Keysight observed failures during the Routine Safety Test. Investigation found a recently changed R101 resistor, from a 39K ohm part to a new 47K ohm part is against the printed circuit board ground plane and insulation breakdown may cause a safety concern. This issue is limited to the serial numbers listed above. 2018.12.13
DSOX4154A Safety DSOX4154A-04-S Over the past month, Keysight observed failures during the Routine Safety Test. Investigation found a recently changed R101 resistor, from a 39K ohm part to a new 47K ohm part is against the printed circuit board ground plane and insulation breakdown may cause a safety concern. This issue is limited to the serial numbers listed above. 2018.12.13
DSOX91604A Modification Recommended DSOX91604A-03 Front panel connector may not offer a good ground connection for probes 2011.08.04
DSOX92004A Modification Recommended DSOX92004A-03 Front panel connector may not offer a good ground connection for probes 2011.08.04
DSOX92504A Modification Recommended DSOX92504A-03 Front panel connector may not offer a good ground connection for probes 2011.08.04
DSOX92804A Modification Recommended DSOX92804A-03 Front panel connector may not offer a good ground connection for probes 2011.08.04
DSOX93204A Modification Recommended DSOX93204A-03 Front panel connector may not offer a good ground connection for probes 2011.08.04
DSOX95004Q Modification Recommended DSOX95004Q-01 Using the Real Channels with differential mode on and or Precision Probe on, causes the Main FPGA to dip and data fryers are observed due to voltage variations. 2014.08.05
DSOX96204Q Modification Recommended DSOX96204Q-01 Using the Real Channels with differential mode on and or Precision Probe on, causes the Main FPGA to dip and data fryers are observed due to voltage variations. 2014.08.05
E1085A Safety 3070-20-S When testhead enclosure is removed, possible shock hazard exists. 1995.12.31
E1085A Safety 3070-26-S Possible electrical shock hazard when POTS rack removed 1996.11.21
E1135C Safety 3070-75B-S The E1135A/B/C PDU may not turn off when the EMO switch (emergency stop) is pressed. 2008.10.27
E1326B Modification Recommended E1326B-01 Modification to prevent erroneous readings and incorrect delay settings 1993.02.28
E1326B Modification Recommended E1326B-02 Modification to prevent losing readings when operating with a V/360 controller 1993.02.28
E1332A Modification Recommended E1332A-01 Modification to prevent losing readings when operating with a V/360 controller 1993.02.28
E1332A Modification Recommended E1332A-02 Modification to prevent errors 1991.10.31
E1333A Modification Recommended E1333A-01 Modification to prevent losing readings when operating with a V/360 controller 1993.02.28
E1345A Modification Recommended E1345A-01 Modification to prevent premature relay failures 1998.03.01
E1351A Modification Recommended E1351A-01 Modification prevents high environment noise causing random errors & disrupting 1993.02.28
E1352A Modification Recommended E1352A-01 Modification prevents high environment noise causing random errors & disrupting 1993.02.28
E1353A Modification Recommended E1353A-01 Modification prevents high environment noise causing random errors & disrupting 1993.02.28
E1400B Modification Recommended E1400B-03 Correction for defective backplane connectors 1992.09.30
E1400T Modification Recommended E1400T-03 Correction for defective backplane connectors 1992.09.30
E1401A Safety E1401A-02-S Buildup of surface contamination inside the E1401A power supply plus a jumper wire with damaged insulation may cause a shock hazard to exist on an externallyaccessible pin on the rear panel of the E1401A mainframe. 1993.04.05
E1401B Modification Recommended E1401B-01 Mainframe trips GFI circuit breakers 1998.10.14
E1401B Modification Available E1401B-02 Cooling fan makes ""clicking"" noise 1999.04.05
E1401B Modification Recommended E1401B-03 Update exchange assembly for low input voltage 1999.08.09
E1401B Modification Recommended E1401B-04 New power supply improves performance 2000.12.10
E1411B Modification Recommended E1411B-01 Modifications to prevent erroneous readings and correct delay settings 1993.02.28
E1411B Modification Recommended E1411B-02 Modification to prevent losing readings when operating with a V/360 controller 1993.02.28
E1411B Modification Recommended E1411B-03 Replacement transformer stops Ohms drift 1999.11.28
E1420B Modification Available E1420B-02A New F/W Rev B.03.00 and B.03.40 1993.12.31
E1421B Modification Recommended E1421B-01 Mainframe trips GFI Circuit Breakers 1999.04.05
E1421B Modification Available E1421B-02 Cooling fan makes ""clicking"" noise 1999.04.05
E1421B Modification Recommended E1421B-03 E1421B 6-Slot, C-size VXI Mainframe 1999.06.23
E1421B Modification Recommended E1421B-04 New power supply improves performance 2000.12.10
E1437A Modification Recommended E1437A-01 External trigger improved 1999.02.17
E1445A Modification Recommended E1445A-01 Modification corrects unit failure due to reverse-biased capacitors 1992.09.30
E1446A Modification Recommended E1446A-01 New fuse prevents output from sticking at +24 or -24Vdc rail 1993.05.31
E1460A Modification Recommended E1460A-01 E1460A may fail to open/close relays because of a defective relay driver IC with date code 0325 2009.07.28
E1465A Modification Recommended E1465A-01 E1465A may fail to open/close relays because of a defective relay driver IC with date code 0325 2009.07.28
E1466A Modification Recommended E1466A-01 E1466A may fail to open/close relays because of a defective relay driver IC with date code 0325 2009.07.28
E1467A Modification Recommended E1467A-01 E1467A may fail to open/close relays because of a defective relay driver IC with date code 0325 2009.07.29
E1472A Modification Recommended E1472A-01 Mod prevents erratic operation at elevated temperatures 1994.08.04
E1474A Modification Recommended E1474A-01 Mod prevents erratic operation at elevated temperatures 1994.08.04
E1550A Safety E1550A-01-S Due to mismarked input voltage rating, voltages as high as 170 Vrms / 200 Vdc could be present on exposed user accessible connector pins. These voltages also exceed the module circuitry insulation system. These conditions can result in a possible electric shock hazard. 1994.08.31
E1779A Modification Recommended E1779A-01 Lower the DC Fuse rating 2002.05.28
E2190A Safety 3070-62B-S Top cover possibly causes pinch hazard 2002.11.06
E2225A Modification Available E2225A-01A HP-CAS update revision v.1.52 1999.02.17
E2225A Modification Recommended E2225A-02A CON2 SRAM Data Loss modification 1999.02.17
E2225A Modification Recommended E2225A-04 PISA12U Fails at low temperatures 1999.04.05
E2225A Modification Recommended E2225A-05B HP-CAS patch revision v.1.52 1999.06.23
E2228A Modification Recommended E2228A-01A BIOS Update 2004.05.25
E2228A Modification Recommended E2228A-02 DVD/CD drives must be replaced in noted serial number range 2004.05.10
E2228A Modification Recommended E2228A-04 System PDU grounding modification for increased measurement accuracy. 2005.05.18
E2230A Modification Recommended E2230A-04 System PDU grounding modification for increased measurement accuracy 2005.05.18
E2675A Modification Recommended E2675A-01 All black and early vintage gray nose cones or tips can crack or break 2009.01.20
E2676A Modification Recommended E2676A-01 All black and early vintage gray nose cones or tips can crack or break 2009.01.20
E3101A Modification Recommended E3101A-01 4071A Software Update To Revision 1.1 2001.01.07
E3101A Modification Recommended E3101A-02 Firmware Update To Fix the Diag Leak Test Fail 2001.01.07
E3101A Modification Recommended E3101A-03 Recommended replacement of varistor due to high temperatures 2001.01.28
E3101A Modification Recommended E3101A-04B Optical communication quality improvement 1999.02.17
E3101A Modification Recommended E3101A-05A Contact of the terminals of outlets are loose 1999.04.05
E3101A Modification Recommended E3101A-06A Solution for the breaking of a relay coil 1999.02.17
E3101A Modification Recommended E3101A-07 Under certain operating conditions, incorrect data is observed 1998.11.23
E3101A Modification Recommended E3101A-10A All the SMUs show ""another SMU has reached compliance"" 1999.06.23
E3101A Modification Recommended E3101A-12 Chuck Connection Cable Became Longer 2000.01.17
E3101A Modification Recommended E3101A-13 17-inch monitor cannot be fixed on the rack mount kit 2000.11.07
E3101A Modification Recommended E3101A-14 Display picture may be distorted 2001.02.07
E3101A Modification Recommended E3101A-16A Power Fail Occurred after Over Current when Using HPSMU 2001.09.07
E3101A Modification Available E3101A-17 Cable stoppers prevent to loosen extended path cable. 2002.01.21
E3101B Modification Recommended E3101A-16A Power Fail Occurred after Over Current when Using HPSMU 2001.07.31
E3102A Modification Recommended E3102A-01 Chuck Connection Cable Became Longer 2000.01.17
E3102A Modification Recommended E3102A-02 Display picture may be distorted 2001.02.07
E3102A Modification Recommended E3102A-04A Power fail occurred after over current when using HPSMU 2001.09.07
E3102A Modification Recommended E3102A-05 Wrong ground fault current setting for 200V PDU. 2004.02.23
E3102A Modification Recommended E3102A-06 Wrong Ground Fault Current Setting for 200 V PDU 2006.02.07
E3102A Modification Recommended E3102A-08 When upgrade system controller to C8000 or xr8400 and rack into cabinet, 450mm width or more is required. If less, this service note is available, that is, replace whole cabinet. 2007.05.17
E3102B Modification Recommended E3102B-01 Wrong ground fault current setting for 200V PDU. 2004.02.23
E3102B Modification Recommended E3102B-02 Wrong Ground Fault Current Setting for 200 V PDU 2006.02.07
E3103A Modification Recommended E3103A-01 Display picture may be distorted 2001.02.07
E3103A Modification Recommended E3103A-03A Power fail occurred after over current when using HPSMU 2001.09.07
E3103A Modification Recommended E3103A-04 Wrong ground fault current setting for 200V PDU. 2004.02.23
E3103A Modification Recommended E3103A-05 Wrong Ground Fault Current Setting for 200 V PDU 2006.02.07
E3103A Modification Recommended E3103A-07 When upgrade system controller to C8000 or xr8400 and rack into cabinet, 450mm width or more is required. If less, this service note is available, that is, replace whole cabinet. 2007.05.17
E3103B Modification Recommended E3103B-01 Wrong ground fault current setting for 200V PDU. 2004.02.23
E3103B Modification Recommended E3103B-02 3458A fails diagnosis DVM test 2005.10.13
E3103B Modification Recommended E3103B-03 Wrong Ground Fault Current Setting for 200 V PDU 2006.02.07
E3170A Modification Recommended E3170A-01 Flexible disk drive does not work or BASIC/UX may be unstable 1998.12.14
E3170AJ Modification Recommended E3170AJ-01 Flexible disk drive does not work or BASIC/UX may be unstable 1998.12.14
E3171A Modification Recommended E3171A-01 Real time clock may be wrong if you turn off controller AC power 2002.08.22
E3171AJ Modification Recommended E3171AJ-01 Real-time clock may be wrong if you turn off controller AC power 2002.08.22
E3452A Priority Safety E3452A-01-S Capacitor may fail causing a potential fire hazard 1998.10.14
E3459A Modification Recommended E3459A-01 Possible incompatibility between target interface modules 2000.11.07
E3610A Modification Recommended E3610A-01 Replacing output binding posts improves mechanical performance 1992.10.31
E3610A Modification Recommended E3610A-02 Mod eliminates V transient above output set during turn-off 1993.12.31
E3610A Modification Recommended E3610A-03 New voltage control eliminates output voltage overshoot 1994.10.10
E3610A Modification Recommended E3610A-04 Mod eliminates V transient above output set during turn-off 1996.03.14
E3610A Modification Recommended E3610A-05A Modification to Eliminate Oscillations during changing load conditions 2002.06.02
E3610A Safety E3610A-06E-S The AC power module can accidentally come out of the instrument creating a shock hazard. 2011.01.03
E3610A Modification Recommended E3610A-07 This modification is required to eliminate oscillation when the output voltage and/or load conditions are changed. 2009.11.08
E3611A Modification Recommended E3611A-01 Replacing output binding posts improves mechanical performance 1992.10.31
E3611A Modification Recommended E3611A-02 Mod eliminates V transient above output set during turn-off 1993.12.31
E3611A Modification Recommended E3611A-03 Elimination of RF oscillation for lightly loaded supply 1994.03.10
E3611A Modification Recommended E3611A-04 New voltage control eliminates output voltage overshoot 1994.10.10
E3611A Modification Recommended E3611A-05 Mod eliminates V transient above output set during turn-off 1996.03.14
E3611A Modification Recommended E3611A-06A Modification to eliminate output oscillation during changing load conditions. 2002.06.02
E3611A Safety E3611A-07E-S The AC power module can accidentally come out of the instrument creating a shock hazard. 2011.01.03
E3612A Modification Recommended E3612A-01 Replacing output binding posts improves mechanical performance 1992.10.31
E3612A Modification Recommended E3612A-02 Mod eliminates V transient above output set during turn-off 1993.12.31
E3612A Modification Recommended E3612A-03 Mod eliminates V transient above output set during turn-off 1996.03.14
E3612A Safety E3612A-04F-S The AC power module can accidentally come out of the instrument creating a shock hazard. 2011.01.03
E3614A Modification Recommended E3614A-01 New fuse eliminates intermittent blowing (Opt 0E3) 1994.01.27
E3614A Safety E3614A-02C-S The AC power module can accidentally come out of the instrument creating a 2011.01.03
E3615A Modification Recommended E3615A-01 New fuse eliminates intermittent blowing (Opt 0E3) 1994.01.27
E3615A Safety E3615A-02C-S The AC power module can accidentally come out of the instrument creating a shock hazard. 2011.01.03
E3616A Modification Recommended E3616A-01 New fuse eliminates intermittent blowing (Opt 0E3) 1994.01.27
E3616A Modification Recommended E3616A-02 Modification to correct possible open circuit 1997.02.10
E3616A Safety E3616A-03C-S The AC power module can accidentally come out of the instrument creating a shock hazard. 2011.01.03
E3617A Modification Recommended E3617A-01 New fuse eliminates intermittent blowing (Opt 0E3) 1994.01.27
E3617A Modification Recommended E3617A-02 Modification to correct possible open circuit 1997.02.10
E3617A Safety E3617A-03C-S The AC power module can accidentally come out of the instrument creating a shock hazard. 2011.01.03
E3620A Safety E3620A-06C-S The AC power module can accidentally come out of the instrument creating a shock hazard. 2011.01.03
E3620A Modification Recommended E3620A-07 The Grey key caps (P/N E3630-40007) may crack overtime. 2005.08.28
E3630A Modification Recommended E3630A-01A Reliability improvement for supplies that fail in the field 2000.01.17
E3630A Modification Recommended E3630A-02 Mod to readjust the current limit of the 6V output 1998.11.23
E3630A Safety E3630A-03E-S The AC power module can accidentally come out of the instrument creating a shock hazard. 2011.01.03
E3630A Modification Recommended E3630A-04 The Grey key caps (P/N E3630-40007) may crack overtime. 2005.08.28
E3631A Modification Recommended E3631A-01 New line fuse improves Opt. 0E3 (230 Vac input) 1996.09.12
E3631A Modification Recommended E3631A-02 Mod removes output undershoot in the +25V power supply 1996.11.21
E3631A Modification Recommended E3631A-03 Modification reduces VRMS ripple and noise on output 1998.03.01
E3631A Modification Available E3631A-04C Firmware upgrade to eliminate output offsets in the OFF state 1999.06.23
E3631A Modification Recommended E3631A-05A How to handle the 6V output defect 1999.06.23
E3631A Modification Recommended E3631A-06 Transient failure on outputs when utilizing *RST command 1999.02.17
E3631A Modification Recommended E3631A-07 HP-IB cable retaining screws will not tighten by hand 1999.06.23
E3631A Modification Recommended E3631A-08 Firmware upgrade to eliminate a transient spike on the outputs 1999.08.09
E3631A Modification Recommended E3631A-09D +6V output channel shows current drawn without load 2011.07.26
E3631A Modification Recommended E3631A-10 EPROM contact issue cause display went off when power ON. 2005.12.19
E3631A Modification Recommended E3631A-11 Difficulty to adjust the knob control on front panel due to encoder issue. 2007.02.13
E3631A Modification Recommended E3631A-12 ±25V output channel displays intermittent conductivity to ground terminal 2011.08.02
E3631A Modification Available E3631A-13D Metal Strap Kit for tightening loose bumper and for fitting rear lock link in sideby-side rack mounting 2013.10.14
E3632A Modification Recommended E3632A-01 HP-IB cable retaining screws will not tighten by hand 1999.06.23
E3632A Modification Recommended E3632A-02A Display went off during power On. 2006.01.25
E3632A Modification Recommended E3632A-03 Difficulty to adjust the knob control on front panel due to encoder issue. 2007.02.13
E3632A Modification Available E3632A-04D Metal Strap Kit for tightening loose bumper and for fitting rear lock link in sideby-side rack mounting 2013.10.14
E3633A Modification Recommended E3633A-01 HP-IB cable retaining screws will not tighten by hand 1999.06.23
E3633A Modification Recommended E3633A-02 OCP is not functional 2000.01.17
E3633A Modification Recommended E3633A-03 Display went off during power On. 2005.12.19
E3633A Modification Recommended E3633A-04 Difficulty to adjust the knob control on front panel due to encoder issue. 2007.02.12
E3633A Modification Available E3633A-05D Metal Strap Kit for tightening loose bumper and for fitting rear lock link in sideby-side rack mounting 2013.10.14
E3634A Modification Recommended E3634A-01 HP-IB cable retaining screws will not tighten by hand 1999.06.23
E3634A Modification Recommended E3634A-02 OCP is not functional 2000.01.17
E3634A Modification Recommended E3634A-03 Display went off during power On. 2005.12.19
E3634A Modification Recommended E3634A-04 Difficulty to adjust the knob control on front panel due to encoder issue. 2007.02.12
E3634A Modification Available E3634A-05C Metal Strap Kit for tightening loose bumper and for fitting rear lock link in sideby-side rack mounting 2013.07.08
E3640A Modification Recommended E3640A-01 Display went off during power On. 2006.03.16
E3640A Modification Recommended E3640A-02 Difficulty to adjust the knob control on front panel due to encoder issue. 2007.02.13
E3641A Modification Recommended E3641A-01 Display went off during power On. 2006.03.16
E3641A Modification Recommended E3641A-02 Difficulty to adjust the knob control on front panel due to encoder issue. 2007.02.13
E3642A Modification Recommended E3642A-01 Display went off during power On. 2006.03.16
E3642A Modification Recommended E3642A-02 Difficulty to adjust the knob control on front panel due to encoder issue. 2007.02.13
E3643A Modification Recommended E3643A-01 Display went off during power On. 2006.03.16
E3643A Modification Recommended E3643A-02 Difficulty to adjust the knob control on front panel due to encoder issue. 2007.02.13
E3644A Modification Recommended E3644A-01 Display went off during power On. 2006.03.16
E3644A Modification Recommended E3644A-02 Difficulty to adjust the knob control on front panel due to encoder issue. 2007.02.13
E3645A Modification Recommended E3645A-01 Display went off during power On. 2006.03.16
E3645A Modification Recommended E3645A-02 Difficulty to adjust the knob control on front panel due to encoder issue. 2007.02.13
E3646A Modification Recommended E3646A-01A The Capacitors used in circuit references (C107, C108, C173 & C174) have been found to have cold solder connections. 2008.10.29
E3646A Modification Recommended E3646A-02 Display went off during power On. 2006.03.16
E3646A Modification Recommended E3646A-03 Difficulty to adjust the knob control on front panel due to encoder issue. 2007.02.13
E3646A Modification Available E3646A-04C Metal Strap Kit for tightening loose bumper and for fitting rear lock link in sideby-side rack mounting 2013.07.08
E3647A Modification Recommended E3647A-01A The Capacitors used in circuit references (C107, C108, C173 & C174) have been found to have cold solder connections. 2008.10.29
E3647A Modification Recommended E3647A-02 Display went off during power On. 2006.03.16
E3647A Modification Recommended E3647A-03 Difficulty to adjust the knob control on front panel due to encoder issue. 2007.02.13
E3647A Modification Available E3647A-04D Metal Strap Kit for tightening loose bumper and for fitting rear lock link in sideby-side rack mounting 2013.10.14
E3648A Modification Recommended E3648A-01A The Capacitors used in circuit references (C107, C108, C173 & C174) have been found to have cold solder connections. 2008.10.29
E3648A Modification Recommended E3648A-02 Display went off during power On. 2006.03.16
E3648A Modification Recommended E3648A-03 Difficulty to adjust the knob control on front panel due to encoder issue. 2007.02.13
E3648A Modification Available E3648A-04C Metal Strap Kit for tightening loose bumper and for fitting rear lock link in sideby-side rack mounting 2013.07.08
E3649A Modification Recommended E3649A-01A The Capacitors used in the Circuit Reference (C107, C108, C173 & C174) have been found with cold solder connections 2008.10.29
E3649A Modification Recommended E3649A-02 Display went off during power On. 2006.03.16
E3649A Modification Recommended E3649A-03 Difficulty to adjust the knob control on front panel due to encoder issue. 2007.02.13
E3649A Modification Available E3649A-04D Metal Strap Kit for tightening loose bumper and for fitting rear lock link in sideby-side rack mounting 2013.10.14
E3770A Modification Recommended 3070-106 New control XTPB card firmware to adjust the delay time for relay opening, to resolve intermittent relay failures observed on pin cards while working together with XTPB cards. 2024.03.05
E3910A Priority Safety E3910A-02-S Inadequate ground may cause possible shock hazard 1994.01.27
E3910B Priority Safety E3910B-02-S Inadequate ground may cause possible shock hazard 1994.01.27
E3939A Priority Safety E3939A-02-S High voltage applied to the connector module plane or connector module handle could cause the existing ground path to open, resulting in a possible shock hazard to the user. 1994.01.02
E3939B Priority Safety E3939B-02-S High voltage applied to the connector module plane or connector module handle could cause the existing ground path to open, resulting in a possible shock hazard to the user. 1994.01.02
E3951A Priority Safety E3951A-01-S Mains voltages may be exposed at the rear of the power switch and mains voltages can be accessible during mains fuse replacement. 1994.09.30
E3980A Modification Recommended E3980A-FG-01 E3980A-FG (SimPlate Fixture Alignment Plates) are used in test fixtures in i3070 test systems. For certain batch, cracks are found near screw hole and other areas after use. 2022.09.28
E3980A Priority Safety E4093B-02-S Inadequate ground may cause possible shock hazard 1994.01.27
E4015A Safety 3070-45C-S 3rd Party fixture kits may create a serious pinch hazard 2003.04.30
E4025A Priority Safety 3070-43E-S Software defects prohibit safety procedures from operating properly 1999.01.31
E4025A Priority Safety 3070-58A-S Telescoping tube irregularity may cause a potential safety hazard 2000.12.31
E4025A Safety 3070-70-S Power cord connectors might have intermittant connections 2003.01.12
E4026AG Safety 3070-64G-S POSSIBLE PINCH HAZARD 2004.12.05
E4095B Priority Safety E4095B-02-S Inadequate ground may cause possible shock hazard 1994.01.27
E4100B Priority Safety E4100B-02-S High voltage applied to the connector module plane or connector module handle could cause the existing ground path to open, resulting in a possible shock hazard to the user. 1994.01.02
E4350B Modification Recommended E4350B-03A Repair Strategy is Return to AMC. The Peak to Peak Ripple & Noise at 20 kHz, when operated as a Solar Simulator is Out of specification. 2009.10.28
E4351B Modification Recommended E4351B-02 When the E4351B is operated at high line and no load “C723” may fail. 2003.11.02
E4351B Modification Recommended E4351B-04A Repair Strategy is Return to AMC The Peak to Peak Ripple & Noise at 20 kHz, when operated as a Solar Array Simulator is Out of specification. 2009.10.29
E4356A Modification Recommended E4356A-01 Incorrect Capacitor on Control Board 1999.10.31
E4356A Modification Recommended E4356A-02A Upgrade for ""Unstable"" Current Shunt ""R907"" 2003.10.20
E4356A Modification Recommended E4356A-04 The four filter capacitors circuit reference (C416-C419) on the A4 AC input board starts leaking electrolyte 2009.08.18
E4360A Modification Recommended E4360A-01 Due to inductive coupling resulting from the AC and DC cables being tied together, a communication error occurs. 2011.08.15
E4360A Modification Recommended E4360A-04 Devices found to have duplicate MAC addresses can cause an IP conflict when connected on the same local network. 2019.08.04
E4360A Modification Recommended E4360A-05 Front Panel Keypad Incorrect Function Error 2021.09.27
E4360A Modification Recommended E4360A-06 Front Panel Display Flickering 2022.09.21
E4401B Safety E4401B-05-S Defective handle may cause personal injury or equipment damage 2000.04.04
E4401B Safety E4401B-05A-S Defective handle may cause personal injury or equipment damage 2023.06.29
E4402B Modification Recommended E4402B-04 New flex circuit prevents dendrite growth/short circuits 2000.04.30
E4402B Safety E4402B-05-S Defective handle may cause personal injury or equipment damage 2000.04.04
E4402B Modification Recommended E4402B-07 Intermittent screen "flicker" due to a cold solder joint 2000.12.31
E4402B Modification Recommended E4402B-08 Defective Field Effect Transistors may cause L.O. Unlevel or Source L.O. Unlevel error message(s) 2002.02.14
E4402B Modification Recommended E4402B-09 Instruments that have firmware revision less than or equal to A.05 will fail frequency response performance tests 2001.10.31
E4402B Modification Recommended E4402B-10 Replace A7A6 U51 to solve a problem with displaying PAL and SECAM TV 2002.11.07
E4402B Modification Recommended E4402B-11 Replace Micron DRAM SIMMS from the A4, CPU assembly 2002.02.14
E4402B Modification Available E4402B-14 Incorrectly manufacturered transformer inside the 2nd Converter causes no L.O. Feedthrough or other input signals to be displayed on initial power up. 2004.04.01
E4402B Modification Recommended E4402B-17 RF compatibility check for the upgrade option B7D/B7E. 2006.10.16
E4403B Modification Recommended E4403B-03 New flex circuit prevents dendrite growth/short circuits 2000.04.30
E4403B Safety E4403B-04-S Defective handle may cause personal injury or equipment damage 2000.04.04
E4403B Safety E4403B-04A-S Defective handle may cause personal injury or equipment damage 2023.06.29
E4403B Modification Recommended E4403B-06 Intermittent screen "flicker" due to a cold solder joint 2000.12.31
E4403B Modification Recommended E4403B-07 Defective Field Effect Transistors may cause L.O. Unlevel or Source L.O. Unlevel error message(s) 2002.02.14
E4403B Modification Available E4403B-09 Incorrectly manufactured transformer inside the 2nd Converter causes no L.O. Feedthrough or other input signals to be displayed on initial power up. 2004.04.01
E4404B Modification Recommended E4404B-03 New flex circuit prevents dendrite growth/short circuits 2000.04.30
E4404B Safety E4404B-04-S Defective handle may cause personal injury or equipment damage 2000.02.29
E4404B Safety E4404B-04A-S Defective handle may cause personal injury or equipment damage 2023.06.29
E4404B Modification Recommended E4404B-06 Intermittent screen "flicker" due to a cold solder joint 2000.12.31
E4404B Modification Recommended E4404B-07 Defective Field Effect Transistors may cause L.O. Unlevel or Source L.O. Unlevel error message(s) 2002.02.14
E4404B Modification Recommended E4404B-08 Instruments that have firmware revision less than or equal to A.05 will fail frequency response performance tests 2001.10.31
E4404B Modification Recommended E4404B-09 Replace A7A6 U51 to solve a problem with displaying PAL and SECAM TV 2002.11.07
E4404B Modification Recommended E4404B-10 Replace Micron DRAM SIMMS from the A4, CPU assembly 2002.02.14
E4404B Modification Available E4404B-13 Incorrectly manufactured transformer inside the 2nd Converter causes no L.O. Feedthrough or other input signals to be displayed on initial power up. 2004.04.01
E4404B Modification Recommended E4404B-17 RF compatibility check for the upgrade option B7D/B7E. 2006.10.16
E4405B Modification Recommended E4405B-03 New flex circuit prevents dendrite growth/short circuits 2000.04.30
E4405B Safety E4405B-04-S Defective handle may cause personal injury or equipment damage 2000.02.29
E4405B Modification Recommended E4405B-06 Intermittent screen "flicker" due to a cold solder joint 2000.12.31
E4405B Modification Recommended E4405B-07 Defective Field Effect Transistors may cause L.O. Unlevel or Source L.O. Unlevel error message(s) 2002.02.14
E4405B Modification Recommended E4405B-08 Instruments that have firmware revision less than or equal to A.05 will fail frequency response performance tests 2001.10.31
E4405B Modification Recommended E4405B-09 Replace A7A6 U51 to solve a problem with displaying PAL and SECAM TV 2002.11.07
E4405B Modification Recommended E4405B-10 Replace Micron DRAM SIMMS from the A4, CPU assembly 2002.02.14
E4405B Modification Available E4405B-13 Incorrectly manufactured transformer inside the 2nd Converter causes no L.O. Feedthrough or other input signals to be displayed on initial power up. 2004.04.01
E4405B Modification Recommended E4405B-17 RF compatibility check for the upgrade option B7D/B7E. 2006.10.16
E4406A Safety E4406A-06-S Left side handle under abnormal or irregular conditions may fail 1999.12.28
E4406A Modification Recommended E4406A-07 A10 Digital IF Assembly and A22 Processor Assy can become partially unplugged 2001.06.05
E4407B Modification Recommended E4407B-03 New flex circuit prevents dendrite growth/short circuits 2000.04.30
E4407B Safety E4407B-04-S Defective handle may cause personal injury or equipment damage 2000.04.04
E4407B Safety E4407B-04A-S Defective handle may cause personal injury or equipment damage 2023.06.29
E4407B Modification Recommended E4407B-06 Intermittent screen "flicker" due to a cold solder joint 2000.12.31
E4407B Modification Recommended E4407B-07 Defective Field Effect Transistors may cause L.O. Unlevel or Source L.O. Unlevel error message(s) 2002.02.14
E4407B Modification Recommended E4407B-08 Instruments that have firmware revision less than or equal to A.05 will fail frequency response performance tests 2001.10.31
E4407B Modification Recommended E4407B-09 Replace A7A6 U51 to solve a problem with displaying PAL and SECAM TV 2002.11.07
E4407B Modification Recommended E4407B-10 Replace Micron DRAM SIMMS from the A4, CPU assembly 2002.02.14
E4407B Modification Available E4407B-13 Incorrectly manufactured transformer inside the 2nd Converter causes no L.O. Feedthrough or other input signals to be displayed on initial power up. 2004.04.01
E4407B Modification Recommended E4407B-17 RF compatibility check for the upgrade option B7D/B7E. 2006.10.16
E4408B Modification Recommended E4408B-03 New flex circuit prevents dendrite growth/short circuits 2000.04.30
E4408B Safety E4408B-04-S Defective handle may cause personal injury or equipment damage 2000.04.04
E4408B Safety E4408B-04A-S Defective handle may cause personal injury or equipment damage 2023.06.29
E4408B Modification Recommended E4408B-06 Intermittent screen "flicker" due to a cold solder joint 2000.12.31
E4408B Modification Recommended E4408B-07 Defective Field Effect Transistors may cause L.O. Unlevel or Source L.O. Unlevel error message(s) 2002.02.14
E4408B Modification Available E4408B-09 Incorrectly manufactured transformer inside the 2nd Converter causes no L.O. Feedthrough or other input signals to be displayed on initial power up. 2004.04.01
E4411A Safety E4411A-22-S Defective handle may cause personal injury or equipment damage 2000.04.04
E4411B Modification Recommended E4411B-03 Frequency response (less than 50kHz) may fail the +/- 0.5dB table 1.1 spec 2000.10.24
E4411B Modification Recommended E4411B-04 New flex circuit prevents dendrite growth/short circuits 2000.04.30
E4411B Safety E4411B-05-S Defective handle may cause personal injury or equipment damage 2000.04.04
E4411B Safety E4411B-05A-S Defective handle may cause personal injury or equipment damage 2023.06.29
E4411B Modification Recommended E4411B-07 Intermittent screen "flicker" due to a cold solder joint 2000.12.31
E4411B Modification Recommended E4411B-08 Firmware Update to Fix High Noise Floor on the Analyzer Screen. 2002.01.13
E4416A Modification Available E4416A-01 RS422 Serial Communication Interface Disabled 2001.02.22
E4416A Safety E4416A-02B-S HI-POT procedure for earth leakage and earth continuity 2013.12.01
E4416A Modification Recommended E4416A-04 Latent Defect Causes Calibrator To Fail Built in Self Test 2003.02.20
E4416A Modification Recommended E4416A-06 Compatibility Issue With Long Power Sensor Cables 2004.01.28
E4416A Modification Recommended E4416A-10 Front Panel Dimension Might Not Be Suitable For Rack Mounting Solutions 2005.04.13
E4416A Modification Recommended E4416A-11A Front Panel Display Problems Caused by Power Assembly Cable 2005.12.04
E4416A Modification Recommended E4416A-12A Front Panel Display Problems Caused by Power Assembly Cable 2005.12.04
E4416A Modification Recommended E4416A-15A Power Meter Display Shrink 2010.06.27
E4416A Modification Recommended E4416A-16 Overload Failure in W-CDMA & HSDPA Signal Measurement when RF Input Exceeds -1dBm 2011.10.02
E4416A Modification Recommended E4416A-18 1mW Power Reference Failure 2022.09.18
E4417A Modification Available E4417A-01 RS422 Serial Communication Interface Disabled 2001.02.22
E4417A Safety E4417A-02B-S HI-POT procedure for earth leakage and earth continuity 2013.12.01
E4417A Modification Recommended E4417A-04 Latent Defect Causing Calibrator To Fail Built 1n Self Test 2003.02.20
E4417A Modification Recommended E4417A-06 Compatibility Issue With Long Power Sensor Cables 2004.01.28
E4417A Modification Recommended E4417A-10 Front Panel Dimension Might Not Be Suitable For Rack Mounting Solutions 2004.04.13
E4417A Modification Recommended E4417A-11A Front Panel Display Problems Caused by Power Assembly Cable 2005.12.04
E4417A Modification Recommended E4417A-12A Front Panel Display Problems Caused by Power Assembly Cable 2005.12.04
E4417A Modification Recommended E4417A-15 Overload Failure in W-CDMA & HSDPA Signal Measurement when RF Input Exceeds -1dBm 2011.10.02
E4417A Modification Recommended E4417A-15A Power Meter Display Shrink 2010.06.27
E4417A Modification Recommended E4417A-18 Calibrations performed on some Dual-Channel Power Meters by Agilent Technologies between February 6th, 2012 and February 6th, 2014 show a pass in the OUTPUT SWR; OUTPUT SWR(REAR PANEL) test, even if the SWR value is < 1. 2014.02.24
E4417A Modification Recommended E4417A-19 1mW Power Reference Failure 2022.09.18
E4418A Safety E4418A-07-S HI-POT procedure for earth leakage and earth continuity 2001.06.30
E4418B Modification Recommended E4418B-01 Intermittent GPIB Communication Problems 2000.01.17
E4418B Modification Recommended E4418B-02A Premature RAM Backup Battery Failure 2011.12.13
E4418B Modification Recommended E4418B-03A Premature RAM Backup Battery Failure in E4418B option 001 units 2011.12.13
E4418B Modification Recommended E4418B-04A Remove & Refit Outer Cover To Fix EMI Gasket Issues. 2003.08.04
E4418B Modification Recommended E4418B-05A GPIB Problems using the E4418B in HP 436A/437B Emulation Modes 2000.11.06
E4418B Modification Recommended E4418B-06 Defective fuse holder clips in line module 2000.11.08
E4418B Modification Recommended E4418B-07A Premature RAM Backup Battery Failure 2003.12.15
E4418B Safety E4418B-08A-S Correct Orientation of the Power Supply’s Force-fit Connector 2012.01.02
E4418B Modification Available E4418B-09 RS422 Serial communication interface disabled 2001.02.11
E4418B Safety E4418B-10C-S HI-POT procedure for earth leakage and earth continuity 2013.12.01
E4418B Modification Recommended E4418B-12 Latent Defect Causing Calibrator To Fail Built in Self Test 2003.02.20
E4418B Modification Recommended E4418B-16 Front Panel Dimension Might Not Be Suitable For Rack Mounting Solutions 2005.04.13
E4418B Modification Recommended E4418B-17A Front Panel Display Problems Caused by Power Assembly Cable 2005.12.04
E4418B Modification Recommended E4418B-18A Front Panel Display Problems Caused by Power Assembly Cable 2005.12.04
E4418B Modification Recommended E4418B-20 Hot plugging problem caused by analog switches (U11) under the measurement board assembly (E4418-60007) 2008.04.28
E4418B Modification Recommended E4418B-22A Power Meter Display Shrink 2010.06.27
E4418B Modification Recommended E4418B-23 Calibrations performed on some Single/Dual-Channel Power Meters by Agilent Technologies between February 6th, 2012 and February 6th, 2014 show a pass in the OUTPUT SWR; OUTPUT SWR (REAR PANEL) test, even if the SWR value is < 1. 2014.02.24
E4419A Safety E4419A-08-S HI-POT procedure for earth leakage and earth continuity 2001.06.30
E4419B Modification Recommended E4419B-02 Premature RAM Backup Battery Failure 2000.01.17
E4419B Modification Recommended E4419B-03 Premature RAM Backup Battery Failure 2000.01.17
E4419B Modification Recommended E4419B-04A Remove & Refit Outer Cover to Fix EMI Gasket Issues 2003.08.04
E4419B Modification Recommended E4419B-05 GPIB Problems using the E4418B in HP 436A/437B Emulation Modes 2000.11.06
E4419B Modification Recommended E4419B-06 Defective fuse holder clips in line module 2000.11.08
E4419B Modification Recommended E4419B-07A Premature RAM Backup Battery Failure 2003.12.15
E4419B Safety E4419B-08A-S Correct Orientation of the Power Supply’s Force-fit Connector 2012.01.02
E4419B Modification Available E4419B-09 RS422 serial communication interface disabled 2001.02.12
E4419B Safety E4419B-10C-S HI-POT procedure for earth leakage and earth continuity 2013.12.01
E4419B Modification Recommended E4419B-12 Latent Defect Causes Calibrator To Fail Built in Self Test 2003.02.20
E4419B Modification Recommended E4419B-16 Front Panel Dimension Might Not Be Suitable For Rack Mounting Solutions 2005.04.13
E4419B Modification Recommended E4419B-17A Front Panel Display Problems Caused by Power Assembly Cable 2005.12.04
E4419B Modification Recommended E4419B-18A Front Panel Display Problems Caused by Power Assembly Cable 2005.12.04
E4419B Modification Recommended E4419B-19B Hot plugging problem caused by analog switches (U11) under the measurement board assembly (E4418-60007) 2008.04.27
E4419B Modification Recommended E4419B-22A Power Meter Display Shrink 2010.06.27
E4419B Modification Recommended E4419B-23 Calibrations performed on some Single/Dual-Channel Power Meters by Agilent Technologies between February 6th, 2012 and February 6th, 2014 show a pass in the OUTPUT SWR; OUTPUT SWR(REAR PANEL) test, even if the SWR value is < 1. 2014.02.24
E4428C Modification Available E4428C-03A DC blocking capacitor, from RLC supplier may cause a power drop of approximately 20dBm 2007.09.10
E4428C Modification Recommended E4428C-09B OLD Power supply warranted replacement on failure. 2010.04.06
E4428C Modification Recommended E4428C-11A Intermittent CPU boot-up and/or No display 2011.06.01
E4428C Modification Recommended E4428C-13 For the DC FM Carrier Offset test, when the 10 MHz reference is not connected between the ESG-C and the Frequency Counter, all measurement results will be zero. 2014.05.18
E4438C Modification Recommended E4438C-01 Replace A11 BER Board Assembly to correct Clock/Gate Delay. 2002.05.06
E4438C Modification Recommended E4438C-07 Failure symptom is rebooting repeatedly or power cycling. This problem is intermittent and can be associated to the CPU board. 2005.03.23
E4438C Modification Recommended E4438C-09 Error Message may appear on in the E4438C error que while the unit is booting up. 2005.11.03
E4438C Modification Recommended E4438C-11 Fails Residual FM performance test.This service note only applies to instruments that do not have the Base band generator option (001, 002, 601 or 602) installed and are not option UNJ. 2005.11.27
E4438C Modification Available E4438C-14A Customers with E4438C’s with failing Frac-N assembly, E8251-60044 are eligible to have their product repaired at Agilent’s expense until 1NOV2007. 2006.10.24
E4438C Modification Available E4438C-15A Customers with E4438C’s with failing Hard disk drives E4400-60253 are eligible to have their product repaired at Agilent’s expense. 2007.06.25
E4438C Modification Recommended E4438C-16 E4438C units with option 300 which are used in base station test system have experienced intermittent PDCH sync lock errors while using the 10 MHz out connection as the reference for another device. 2007.01.22
E4438C Modification Available E4438C-18A DC blocking capacitor, from RLC supplier may cause a power drop of approximately 20dBm 2007.09.10
E4438C Modification Recommended E4438C-23A Intermittent CPU boot-up and/or No display 2011.06.01
E4438C Modification Recommended E4438C-26 For the DC FM Carrier Offset test, when the 10 MHz reference is not connected between the ESG-C and the Frequency Counter, all measurement results will be zero. 2014.05.18
E4440A Modification Available E4440A-16 Tuned RF Level Range 2 to Range 3 Switching Time Improvement 2008.06.25
E4440A Modification Recommended E4440A-20 Internal Alignment Failures for PSA Series Spectrum Analyzers Manufactured Between January 2004 and February 2006 Caused by Low Power Output from A9A1 DRO on A9 Second LO Assembly 2010.08.17
E4443A Modification Available E4443A-15 Tuned RF Level Range 2 to Range 3 Switching Time Improvement 2008.06.25
E4443A Modification Recommended E4443A-19 Internal Alignment Failures for PSA Series Spectrum Analyzers Manufactured Between January 2004 and February 2006 Caused by Low Power Output from A9A1 DRO on A9 Second LO Assembly 2010.08.17
E4445A Modification Available E4445A-15 Tuned RF Level Range 2 to Range 3 Switching Time Improvement 2008.06.25
E4445A Modification Recommended E4445A-19 Internal Alignment Failures for PSA Series Spectrum Analyzers Manufactured Between January 2004 and February 2006 Caused by Low Power Output from A9A1 DRO on A9 Second LO Assembly 2010.08.17
E4446A Modification Recommended E4446A-07 Instruments with Firmware version A.05.06 may fail frequency response above 26.4 GHz or above. This issue is only observed with PSA Firmware version A.05.06. 2004.03.28
E4446A Modification Available E4446A-09 Tuned RF Level Range 2 to Range 3 Switching Time Improvement 2008.07.16
E4446A Modification Recommended E4446A-13 Internal Alignment Failures for PSA Series Spectrum Analyzers Manufactured Between January 2004 and February 2006 Caused by Low Power Output from A9A1 DRO on A9 Second LO Assembly 2010.08.17
E4447A Modification Available E4447A-01 Tuned RF Level Range 2 to Range 3 Switching Time Improvement 2008.06.25
E4447A Modification Recommended E4447A-04 Internal Alignment Failures for PSA Series Spectrum Analyzers Manufactured Between January 2004 and February 2006 Caused by Low Power Output from A9A1 DRO on A9 Second LO Assembly 2010.08.17
E4448A Modification Recommended E4448A-01 A12 LO Synthesizer Board may require memory initialization 2002.09.29
E4448A Modification Recommended E4448A-08 Instruments with Firmware version A.05.06 may fail frequency response above 26.4 GHz or above. This issue is only observed with PSA Firmware version A.05.06. 2004.03.28
E4448A Modification Available E4448A-11 Tuned RF Level Range 2 to Range 3 Switching Time Improvement 2008.06.25
E4448A Modification Recommended E4448A-15 Internal Alignment Failures for PSA Series Spectrum Analyzers Manufactured Between January 2004 and February 2006 Caused by Low Power Output from A9A1 DRO on A9 Second LO Assembly 2010.08.17
E4456B Modification Recommended E4456B-01 Mod to replace incorrect 110V relays in 220-240V units 2000.11.08
E4915A Priority Safety E4915A-03-S A broken AC inlet may Potentially result in a electric shock hazard. 2000.08.31
E4916A Priority Safety E4916A-03-S A broken AC inlet may Potentially result in a electric shock hazard. 2000.08.31
E4980A Modification Recommended E4980A-01B Power supply for E4980A might be defective due to its design 2014.02.13
E4980A Priority Safety E4980A-02B-S There is an unlikely possibility of an electrical shock hazard 2007.03.18
E4980A Safety E4980A-02C-S There is an unlikely possibility of an electrical shock hazard 2007.03.18
E4980A Safety E4980A-02D-S There is an unlikely possibility of an electrical shock hazard 2023.02.26
E4980A Modification Recommended E4980A-03 Firmware update to fix the problem that “*OPC?” command returns “+1” 2006.10.04
E4980A Modification Recommended E4980A-04 Firmware update to fix “:LIST:STM:TYPE command error 2006.10.04
E4980A Modification Recommended E4980A-05 Firmware update to fix the problem that E43 may be displayed while open/short correction is performed 2006.10.04
E4980A Modification Available E4980A-06 The E4980A freezes when receiving “FETCh?” immediately after Open/Short compensation. 2007.12.02
E4980A Modification Recommended E4980A-16A E4980A cannot power on due to PSU malfunction 2019.07.01
E4980A Modification Recommended E4980A-20 E4980A/AL Keypad Stuck While Using Instrument 2021.10.13
E4980AL Modification Recommended E4980AL-09A E4980AL cannot power on due to PSU malfunction 2019.07.01
E4980AL Modification Recommended E4980AL-13 E4980A/AL Keypad Stuck While Using Instrument 2021.10.13
E4981A Modification Recommended E4981A-06 Overload error occurs while Autor-anging with low temperature 2015.06.04
E4981A Modification Recommended E4981A-07A E4981A cannot power on due to PSU malfunction 2019.07.01
E4981A Modification Recommended E4981A-09B D value deviation issue 2019.07.21
E4981A Modification Recommended E4981A-10 C value deviation issue at 1MHz, 1pF range, 1m/2m cable 2019.10.21
E4981A Modification Recommended E4981A-12 E4981A Keypad Stuck While Using Instrument 2021.10.13
E4990A Modification Recommended E4990A-01 Incorrect data in touchstone file (S1P file) 2015.04.08
E4991A Modification Recommended E4991A-03 Abrupt hang-up in continuous measurements 2007.02.06
E4991B Information Only E4991B-06A E4991BU Option 007 Temperature Characteristic Test Kit Installation Procedure 2023.04.10
E5000A Priority Safety E5000A-01-S A broken AC inlet may Potentially result in a electric shock hazard. 2000.08.31
E5010B Modification Recommended E5010B-01 Modification for the trouble 2002.11.04
E5022B Modification Recommended E5022B-02 Measurements related to the E5038A operation may be performed incorrectly 2004.10.18
E5023A Modification Recommended E5023A-02 No write signal output from the E5043A Head Amplifier Control Unit. 2002.11.06
E5023A Modification Recommended E5023A-03 Replace E5037C/D Data Generator Module when it does not output Ref Out signal,(10 MHz). 2004.03.14
E5023A Modification Recommended E5023A-04 Measurements related to the E5038B operation may be performed incorrectly. 2004.10.18
E5052A Modification Recommended E5052A-01 One or two units might have been shipped with wrong keypad rubber 2004.09.20
E5052A Modification Recommended E5052A-02 Abnormal Shutdown due to Power Supply Voltage drop 2006.04.09
E5052A Modification Recommended E5052A-03 A2 Board Not Seated in the Slot Properly 2006.05.09
E5052A Modification Recommended E5052A-06 When step attenuaotor on A1 board fails, replace with A1 board. 2007.07.22
E5052A Modification Recommended E5052A-07 Tripping issue of GFI (Ground Fault Interrupter. 2008.05.12
E5053A Modification Recommended E5053A-01 Power supply for E5053A might be defective due to its design 2006.07.25
E5055A Information Only E5055A-01 How to handle optional licenses which customers purchased in return to factory (RTF) process 2023.02.20
E5055A Modification Recommended E5055A-02 DDS modification to improve performance 2023.03.02
E5060A Priority Safety E5060A-01-S A broken AC inlet may Potentially result in a electric shock hazard. 2000.08.31
E5061A Modification Recommended E5061A-02A One or two units might have been shipped with wrong keypad rubber 2004.09.20
E5061A Modification Recommended E5061A-03B A1 source board failure due to external DC voltage transient 2007.03.25
E5061A Modification Recommended E5061A-04A A2 receiver board fails System Dynamic Range specification due to a very few clock signal generation component might not work properly. 2006.07.30
E5061A Modification Recommended E5061A-05 “PLL Unlock” Error Message due to A21 Analog Interface Board Failure 2006.10.24
E5061A Modification Available E5061A-07 "To strengthen the front USB receptacle, add USB receptacle retention plate" 2009.10.29
E5061A Modification Available E5061A-08B Source level might decrease gradually and become out of spec. 2013.06.19
E5061A Modification Recommended E5061A-09 Tripping issue of GFI (Ground Fault Interrupter) 2010.05.13
E5061B Modification Recommended E5061B-02 A screw for heat sink of CPU board might become loosened. 2010.04.20
E5061B Modification Recommended E5061B-05 Compatibility issue between Touch Screen Controller and HDD 2012.02.28
E5062A Modification Recommended E5062A-02A One or two units might have been shipped with wrong keypad rubber 2004.09.20
E5062A Modification Recommended E5062A-03B A1 source board failure due to external DC voltage transient 2005.10.19
E5062A Modification Recommended E5062A-04A A2 receiver board fails System Dynamic Range specification due to a very few 2006.07.30
E5062A Modification Recommended E5062A-05 “PLL Unlock” Error Message due to A21 Analog Interface Board Failure 2006.10.24
E5062A Modification Available E5062A-07 "To strengthen the front USB receptacle, add USB receptacle retention plate" 2009.10.29
E5062A Modification Available E5062A-08B Source level might decrease gradually and become out of spec. 2013.06.19
E5062A Modification Recommended E5062A-09 Tripping issue of GFI (Ground Fault Interrupter) 2010.05.13
E5063A Modification Recommended E5063A-16 Internal circuit short of A3 board 2019.07.09
E5070B Modification Recommended E5070B-01 Handler I/O pin's threshold may be out of typical characteristics. 2003.01.29
E5070B Modification Recommended E5070B-06E Change the RF signal path configuration and update firmware to 5.02 or later to improve the input damage level tolerance 2007.04.19
E5070B Modification Recommended E5070B-09A One or two units might have been shipped with wrong keypad rubber 2004.09.20
E5070B Modification Recommended E5070B-11A Boot Up Failures at Power-On Require Replacement of 10 GB Hard Disk Drive 2007.05.29
E5070B Modification Recommended E5070B-13 “PLL Unlock” Error Message due to A21 Analog Interface Board Failure 2006.10.04
E5070B Modification Recommended E5070B-14 Firmware update is failed with CP300 HDD image, while updating firmware to FW Rev.A.08.00 or later 2007.03.05
E5070B Modification Available E5070B-17 To strengthen the front USB receptacle, add USB receptacle retention plate. 2009.11.10
E5070B Modification Recommended E5070B-18 Tripping issue of GFI (Ground Fault Interrupter) 2010.05.13
E5071B Modification Recommended E5071B-01 Handler I/O pin's threshold may be out of typical characteristics. 2003.01.29
E5071B Modification Available E5071B-03B Install security patches to protect E5070B/E5071B operating system,(OS), aganist ""Blaster Worm"" and ""Sasser Worm"" infection. 2004.07.12
E5071B Modification Recommended E5071B-06E Change the RF signal path configuration and update firmware to 5.02 or later to improve the input damage level tolerance 2007.04.19
E5071B Modification Recommended E5071B-09A One or two units might have been shipped with wrong keypad rubber 2004.09.20
E5071B Modification Recommended E5071B-11A Boot Up Failures at Power-On Require Replacement of 10 GB Hard Disk Drive 2007.05.29
E5071B Modification Recommended E5071B-13 “PLL Unlock” Error Message due to A21 Analog Interface Board Failure 2006.10.04
E5071B Modification Recommended E5071B-14 Firmware update is failed with CP300 HDD image, while updating firmware to FW Rev.A.08.00 or later 2007.03.05
E5071B Modification Available E5071B-17 To strengthen the front USB receptacle, add USB receptacle retention plate. 2009.11.10
E5071B Modification Recommended E5071B-18 Tripping issue of GFI (Ground Fault Interrupter) 2010.05.13
E5071C Modification Available E5071C-02 "To strengthen the front USB receptacle, add USB receptacle retention plate" 2009.10.28
E5071C Modification Recommended E5071C-03B Tripping issue of GFI (Ground Fault Interrupter) 2013.06.05
E5071C Modification Recommended E5071C-06 The S11 trace shows strange spurs at 68M to 2.1G, when the E5071C operator changes stop frequency to 6G, 6.5G, 7G etc. 2010.08.08
E5071C Modification Recommended E5071C-08 The measurement data is unstable due to a Receiver Port degradation, though a user performs calibration. 2010.10.17
E5071C Modification Available E5071C-19A Boot up failure (2 LED issue) due to condensation 2012.07.16
E5071C Modification Recommended E5071C-25A Some units might be missing one piece of 2GB RAM in the CPU Module 2015.03.23
E5071C Modification Recommended E5071C-26A Phase shifts 180 degree, due to the mixture of RoHS receiver board and non- RoHS receiver board 2013.06.19
E5071C Modification Recommended E5071C-39A Black screen is shown during boot-up due to DSP failure 2014.09.16
E5071C Modification Recommended E5071C-54 E5071C SSD SATA Cable Installation Enhancement for Fixed Data Storage (Opt-019) 2019.08.22
E5071C Modification Recommended E5071C-57 Unstable (jumping) signal on preset, due to A86 Doubler board failure 2022.02.01
E5080A Modification Recommended E5080A-04A Phaselock lost error occurs 2016.12.14
E5080B Modification Recommended E5080B-01 E5080B LVDS Cable Installation Enhancement 2019.09.09
E5080B Modification Recommended E5080B-15 E5080B Automatically restart by itself when it is being powered-off. 2020.11.30
E5080B Information Only E5080B-22 How to handle optional licenses which customers purchased in return to factory (RTF) process. 2023.03.30
E5080B Modification Recommended E5080B-23 Acoustic sound from PSU 2023.12.06
E5080B Modification Recommended E5080B-23A Acoustic sound from PSU 2023.12.13
E5091A Modification Recommended E5091A-01 Correction to Maximum AC Power Consumption label 2002.11.19
E5091A Modification Recommended E5091A-04 Voltage output of Control Line Pin-12 cannot be output due to A3 failure. 2007.02.12
E5100A Modification Recommended E5100A-01 Modification to fix marker target search problem 1995.12.31
E5100A Modification Recommended E5100A-02 Mod fixes I/O Port-C data error 1996.09.12
E5100A Modification Recommended E5100A-03 Mod fixes floppy disk ""Media Uninitialized"" problem 1996.09.12
E5100A Modification Recommended E5100A-04 Mod fixes ""Inpuform"",""Inpurad"", and ""Inpudata"" command errors 1996.09.12
E5100A Modification Recommended E5100A-05 Mod fixes output trace data error 1996.09.12
E5100A Modification Recommended E5100A-06 Mod eliminates excessive beeper sound 1996.09.12
E5100A Modification Recommended E5100A-07 Mod fixes input crosstalk test failure 1996.09.12
E5100A Modification Recommended E5100A-08 Mod fixes incorrect query response for Input 1 port 1996.09.12
E5100A Modification Recommended E5100A-09 Mod fixes error caused by ""Autorec"" file in the floppy disk 1996.09.12
E5100A Modification Recommended E5100A-10 Mod fixes ""-225 out of memory"" error in saving inst data 1996.09.12
E5100A Modification Recommended E5100A-11 Mod fixes incorrect RQS bit data in Status Byte resistor 1996.09.12
E5100A Modification Recommended E5100A-12 Mod prevents unit from hanging up when SMOOTHING is on 1996.09.12
E5100A Modification Recommended E5100A-13 Mod fixes EQUCO? command that returns negative value 1996.09.12
E5100A Modification Recommended E5100A-14 Mod prvnts unit frm hanging up when chan numb set to 3 or 4 1996.09.12
E5100A Modification Recommended E5100A-15 Mod improves unstable phase trace in absolute measurement 1996.09.12
E5100A Modification Recommended E5100A-16 Mod fixes problem where cannot recall saved trace data 1996.09.12
E5100A Modification Recommended E5100A-17 Mod fixes cal interpolation prob when used with a test set 1996.09.12
E5100A Modification Recommended E5100A-18 Mod fixes problem that marker does not respond correctly 1996.09.12
E5100A Modification Recommended E5100A-19 Modification improves brightness problem 1998.03.01
E5100A Modification Recommended E5100A-20 Mod to fix ""EQUCO?"" command problem in admittance display format 1998.10.07
E5100A Modification Recommended E5100A-21 Mod to fix ""PROG:STAT?"" command error in IEEE 64-bit floating point transfer format 1998.11.23
E5100A Modification Recommended E5100A-22 Mod to fix incorrect group delay trace data at first sweep point 1998.11.23
E5100A Modification Recommended E5100A-23 Mod to imrove rotary knob's data adjustment resolution in measuring at narrow sweep span 1998.11.23
E5100A Modification Recommended E5100A-24 Firmware update to fix output setting port on option 003 switched RF 1998.11.23
E5100A Modification Recommended E5100A-25 Mod to fix ""FAIL"" message problem 1998.11.23
E5100A Modification Recommended E5100A-26 Mod to fix list table editor problem when NOP is set over 801 1998.11.23
E5100A Modification Recommended E5100A-27 Mod to fix incorrect bionary data transfer controlled through instrument BASIC 1998.11.23
E5100A Modification Recommended E5100A-28 Mod to fix incorrect measurement data problem 1998.11.23
E5100A Priority Safety E5100A-30-S A broken AC inlet may potentially result in a electric shock hazard 2000.08.31
E5100A Modification Recommended E5100A-31A Source failure with LOW or NO Output Signal. 2002.05.01
E5100A Modification Recommended E5100A-32 "BLIGHT OFF" GP-IB command problem 2001.07.31
E5100A Modification Recommended E5100A-35 Residual response failed around 23.9 MHz and 39.9 MHz 2007.12.11
E5100B Priority Safety E5100B-30-S A broken AC inlet may Potentially result in a electric shock hazard. 2000.08.31
E5250A Modification Recommended E5250A-01 New firmware prevents relay test failures of normal modules 1996.09.12
E5250A Modification Recommended E5250A-02 New firmware corrects Auto Config mode connection problem 1996.11.21
E5250A Modification Recommended E5250A-05 Solution for the breaking of a relay coil 1999.02.17
E5250A Modification Recommended E5250A-06 Overstressed power supply transistor causes the E5250A to not turn on 2000.11.01
E5250A Modification Recommended E5250A-07 E5250A automatically shuts down if over 200 V is applied to AC input. 2003.10.27
E5270A Modification Recommended E5270A-01 SMU Module may be intermittently unrecognized 2003.03.25
E5270B Modification Recommended E5270B-03 Unexpected noise output from HRSMU/MPSUM on specified condition 2009.03.29
E5272A Modification Recommended E5272A-01 SMU module may be intermittently unrecognized 2003.03.25
E5273A Modification Recommended E5273A-01 SMU module may be intermittently unrecognized 2003.03.25
E5505A Modification Available E5505A-01 “Moving PCI cards inside Kontron PC for better airflow” 2011.07.24
E5515B Modification Recommended E5515B-01 Incorrect Output Levels Requires Replacement of RTI EEPROMs 2000-11
E5515C Modification Recommended E5515C-12 Fail to mate the cable on the rear panel “digital bus” connector/Failure is due to an extra washer to be added under the screw on the rear panel 2009.06.17
E5515T Modification Recommended E5515C-04B Mobile Phone Protocol Failures or Dropped Calls Require Replacement of the Demod Down Converter (DDC) 2005.08.17
E5515T Modification Recommended E5515C-08 Power Measurement Accuracy Degradation Requires Replacement of RF Interface 2006.07.30
E5515T Modification Recommended E5515C-09 Failure to Power Up or Audio Analyzer/Source Failures 2007.01.31
E5515T Modification Recommended E5515C-100B Recover-On-Failure (ROF) Program for Multiple Module Identification, Replacement and Test Verification 2006.11.08
E5810A Modification Available E5810A-01 Firmware Upgrade (version A.01.04): Performance Improvement 2007.11.15
E5810A Modification Recommended E5810A-02 E5810A Hang Upon Turned On Due To Power Supply Failure 2010.04.19
E5810A Modification Recommended E5810A-03A E5810A Hang Upon Turned On 2014.11.23
E5904B Modification Recommended E5904B-01 Incorrect component values in pwer supply 2001.08.22
E6000B Modification Recommended E6000B-02 Firmware Update to fix hang-up problem after boot cycle in application screen 2003.10.22
E6000C Modification Recommended E6000C-02 Firmware Update to fix hang-up problem after boot cycle in application screen 2003.10.22
E6198A Safety E6198A-01-S The SLU internal power supply without protective cover is potentially accessible by users when the unused slots are not covered by faceplates. 2008.09.25
E6198A Modification Available E6198A-02 The SLU internal power supply cable with higher current rating (E6170-61601) is available for customers using heavy load switching applications which draw high current from the power supply. 2008.12.16
E6198A Modification Recommended E6198A-03 The SLU internal power supply cable with higher current rating (E6170-61601) is recommended for customers using heavy load switching applications which draw high current from the power supply. 2008.12.16
E6198A Modification Available E6198A-04A Enhancement solution is available to SLU backplane discoloration issue by removing the preload resistors from backplane. 2012.01.20
E6198B Modification Recommended E6198B-01 The existing QuickUSB driver (version 2.14/2.15.1) used with the E6198B Keysight Switch/Load Unit (SLU) via the USB interface, is causing memory leak and resulting in aborted tests. 2020.06.16
E6392A Modification Recommended E6392A-01 Upgrade to Firmware Rev. A.01.10 or later 2000.11.02
E6392A Modification Recommended E6392A-02 Potential stress crack in the rear foot 2000.11.12
E6392B Modification Recommended E6392B-01 Potential stress crack in the rear foot 2000.11.12
E6393A Modification Recommended E6393A-01 Firmware Rev A.01.12 has a problem in RFCH handoff. 2002.01.16
E6393A Modification Recommended E6393A-02 The wrong jumper setting causes Printer Port failure. 2002.04.02
E6393A Modification Recommended E6393A-03A Aging Rate going to be out of specifications 2002.07.11
E6452A Modification Recommended E6452A-01 Firmware upgrade and calibration required 1999.06.30
E6601A Modification Recommended E6601A-01 Recover On-Failure (ROF) Program for CISPR 11 radiated emissions test failure. 2007.12.13
E6607A Modification Recommended E6607A-02A Replace RF connector block assembly upon failure. RF Connectors coming loose from the RF connector block due to over tightening cable onto connector and insufficient loctite used during connector assembly 2013.04.17
E6607C Modification Recommended E6607C-01 High failure rates of the DC/DC converters on the E6607C Source boards. E6607C Source boards E6607-61850 use a larger heat sink. The weight of the larger heat sink results in the board to vibrate more in transit. The increase flexing of the board causes the DC/DC converters to have cracked solder joints which causes a higher fail rate 2014.08.06
E6621A Modification Recommended E6621A-01 Downgrading E6621A Software (Firmware) May Affect Instrument Accuracy 2013.01.01
E6640A Modification Recommended E6640A-01 E6640A units using V9077B/Y9077B WLAN measurement application. Using EXM to make SEM measurement for 80MHz WLAN signal with 240MHz span, because EXM has no image protection, the DUT 1812GHz spur and 5GHz spur get mixed into the SEM span range and cause high SEM failure rate for customer DUT. 2018.02.13
E6640A Modification Recommended E6640A-04 When replacing an M9037A with the new M9035A you will have to replace the M9018A/B chassis with a new M9019A chassis and load firmware version E.28.09 or greater. Charges only apply to the cost of the new M9019A chassis when no more M9037A parts are available 2022.11.06
E6651A Priority Safety E6651A-01-S Defective handle may cause personal injury or equipment damage 2008.04.23
E6651A Modification Recommended E6651A-02 Handle fixings fitted with incorrect torque setting. 2008.07.20
E6651A Modification Recommended E6651A-03 Instrument Display Not Properly Aligned 2009.11.30
E6680A Modification Recommended E6680A-01 F1 & F2 fuses open potentially due to the current / voltage overshoot during E6680A power on. Causing the E6680A application not to start and the M9414A module to be detected in IO connection expert. 2022.03.01
E6680A Modification Recommended E6680A-02 E6680A displays poor TX EVM results due to low power out. Also, can be displayed as self-test failures on the 11 volts supply. 2022.09.25
E6680A Modification Recommended E6680A-03 Units are missing the input level warning label 2022.11.09
E6680E Modification Recommended E6680E-01 Units are missing the input level warning label 2022.11.09
E7401A Safety E7401A-03-S Defective handle may cause personal injury or equipment damage 2000.02.29
E7401A Safety E7401A-03A-S Defective handle may cause personal injury or equipment damage 2023.06.29
E7401A Modification Recommended E7401A-08A Firmware Update Required 2006.05.07
E7402A Safety E7402A-03-S Defective handle may cause personal injury or equipment damage 2000.02.29
E7402A Safety E7402A-03A-S Defective handle may cause personal injury or equipment damage 2023.06.29
E7402A Modification Recommended E7402A-05 Intermittent screen "flicker" due to a cold solder joint 2000.12.31
E7402A Modification Recommended E7402A-06 Replace Micron DRAM SIMMS from the A4, CPU assembly 2002.02.14
E7402A Modification Recommended E7402A-07 Instruments that have firmware revision less than or equal to A.02 will fail frequency response performance tests 2002.02.14
E7402A Modification Recommended E7402A-09A Firmware Update Required 2006.05.07
E7402A Modification Recommended E7402A-12 The front panel flex circuits within this serial range can grow dendrites under certain environmental conditions, which can ultimately short out traces causing the front panel keys on the analyzer not to function. 2009.09.06
E7403A Safety E7403A-03-S Defective handle may cause personal injury or equipment damage 2000.02.29
E7403A Safety E7403A-03A-S Defective handle may cause personal injury or equipment damage 2023.06.29
E7403A Modification Recommended E7403A-09A Firmware Update Required 2006.05.07
E7404A Safety E7404A-03-S Defective handle may cause personal injury or equipment damage 2000.02.29
E7404A Safety E7404A-03A-S Defective handle may cause personal injury or equipment damage 2023.06.29
E7404A Modification Recommended E7404A-09A Firmware Update Required 2006.05.07
E7405A Safety E7405A-03-S Defective handle may cause personal injury or equipment damage 2000.02.29
E7405A Safety E7405A-03A-S Defective handle may cause personal injury or equipment damage 2023.06.29
E7405A Modification Recommended E7405A-05 Intermittent screen "flicker" due to a cold solder joint 2000.12.31
E7405A Modification Recommended E7405A-06 Replace Micron DRAM SIMMS from the A4, CPU assembly 2002.02.14
E7405A Modification Recommended E7405A-07 Instruments that have firmware revision less than or equal to A.02 will fail frequency response performance tests 2002.02.14
E7405A Modification Recommended E7405A-09A Firmware Update Required 2006.05.07
E7405A Modification Recommended E7405A-12 The front panel flex circuits within this serial range can grow dendrites under certain environmental conditions, which can ultimately short out traces causing the front panel keys on the analyzer not to function. 2009.09.06
E7515A Modification Recommended E7515A-01C Modify the Embedded PC to improve boot reliability. 2017.08.15
E7515A Modification Recommended E7515A-02 Replace Intermittent Front Panel On/Off Switch 2015.04.16
E7515A Modification Recommended E7515A-03 During boot-up, all UXMs running FW version 1.3.2.0 or lower, contain a risk of corrupting the flash memory on the Signal Processing Module (SPM). 2016.02.16
E7515A Modification Recommended E7515A-04 Cable ties installed to secure USB internal connections. 2016.02.09
E7515A Modification Recommended E7515A-06A Customer Recovery Image is Deprecated - minimum recommended UXM software version is 1.4.3.0 2017.05.07
E7515A Safety E7515A-07B-S Power Supply Module (PSM) has insufficient insulation between mains circuits and ground. 2017.10.02
E7515B Modification Recommended E7515B-01A Possible Power Supply failure requires the replacement of the E7515B 5V power supply regulator. 2021.05.05
E7515B Modification Recommended E7515B-02 New version of the Vadatech memory modules shipped from June 2020 do not support 900MHz causing possible boot and operation issues. 2020.10.25
E7515B Modification Recommended E7515B-02A New version of the Vadatech memory modules shipped from June 2020 do not support 900MHz causing possible boot and operation issues. 2022.12.06
E7515E Modification Recommended E7515E-01 New version of the Vadatech memory modules shipped from June 2020 do not support 900MHz causing possible boot and operation issues. 2021.11.28
E7571A Modification Available E7571A-01 Input Level Conditioning circuitry improvments 2000.01.17
E7571A Modification Available E7571A-02 Crosstalk performance improvements 2000.01.17
E7572A Modification Available E7572A-01 Input Level Conditioning circuitry improvments 2000.01.17
E7572A Modification Available E7572A-02 Crosstalk performance improvements 2000.01.17
E7573A Modification Available E7573A-01 Crosstalk performance and Input Level conditioning improvements 2000.01.17
E7900A Safety E7900A-01-S Potential power supply failure 2007.09.26
E7907A Modification Available E7907A-02 Remedy for occasional failure to start 2002.11.06
E7907A Modification Recommended E7907A-03 Sometimes E7907A fails to power up. 2002.11.08
E7912A Safety E7912A-01-S Potential power supply failure 2007.09.26
E7917A Modification Recommended E7917A-03 Sometimes E7917A fails to power up. 2002.11.12
E8241A Modification Recommended E8241A-09 When replacing an analog power supply (0955-3700), replace the screws on the bottom of the power supply with shorter screws. 2005.08.21
E8241A Modification Recommended E8241A-10 New power sensor to be used with Agilent N7820A PSG Calibration Application Software 2005.10.11
E8244A Modification Recommended E8244A-09 When replacing an analog power supply (0955-3700), replace the screws on the 2005.08.21
E8247C Modification Recommended E8247C-01 Suspect serial numbers of 5087-7061 (A30 Mod/Filter), with possible reliability problem. 2003.09.24
E8247C Modification Recommended E8247C-11 When replacing an analog power supply (0955-3700), replace the screws on the 2005.08.21
E8247C Modification Recommended E8247C-12 New power sensor to be used with Agilent N7820A PSG Calibration Application 2005.10.11
E8251A Modification Recommended E8251A-10 When replacing an analog power supply (0955-3700), replace the screws on the 2005.08.21
E8251A Modification Recommended E8251A-11 New power sensor to be used with Agilent N7820A PSG Calibration Application Software 2005.10.11
E8254A Modification Recommended E8254A-10 When replacing an analog power supply (0955-3700), replace the screws on the bottom of the power supply with shorter screws. 2005.08.21
E8257C Modification Recommended E8257C-12 Power offset in the Agilent N7800A Test Management Environment Software for power measurements > 0 dBm 2005.08.16
E8257C Modification Recommended E8257C-14 New power sensor to be used with Agilent N7820A PSG Calibration Application 2005.10.11
E8257D Modification Recommended E8257D-02 Possible poor solder on CPU U4 causing power to cycle. 2005.03.24
E8257D Modification Recommended E8257D-03 Incorrect voltage rating on the Analog Mod Gen capacitor C480 2005.03.25
E8257D Modification Recommended