This generator is an HP System II 5-1/4 inch high 19“ rack width 40 lb. instrument with ovenized 10 MHz oscillator as option 001, and uses back BNC connector for frequency reference 10MHz input. The N connector signal output can be on front or back depending on options. GPIB control is as a listener, accepts handshakes, cannot request service, but has remote/local input selection (front panel). The output can be Amplitude modulated 100% when below +7dBm, and FM modulated up to 50 kHz (400 kHz above 1040 MHz) via front panel BNC input of 1V peak.