Keysight Technologies N9030B Service Manual page 222

Front End Control Troubleshooting
A15 Front End Control Assembly Troubleshooting
The I.F. switch path and frequency generation occurs on the A15, Front End
Controller board. This troubleshooting procedure provides the instrument
setups to verify options CR3, CRP and ALV. Test the Aux I.F. output based on
the options installed in the analyzer.
Standard PXA
No test to perform.
Verifying Option CR3
Press the following keys on the analyzer:
Mode, Spectrum Analyzer, Mode Preset, Input/Output, RF Calibrator, 50
MHz, Freq, 50 MHz, Span, 0 Hz, System, Alignments, Auto Align, Off,
Input/Output, More 1 of 2, Output Config, Aux IF Out, Second IF
Connect the Aux I.F. Output on the rear panel to the RF Input of a functioning
spectrum analyzer. If the A15 Front End Controller is switching the I.F.
correctly, you should measure 322.5 MHz at −35 dBm ±3 dB as per Figure 6-9.
Figure 6-9 322.5 MHz
222 N9030B PXA Signal Analyzer Service Guide