Keysight Technologies N9040B UXA Signal Analyzer Service Guide 181
Front End Control Troubleshooting
A15 Front End Control Assembly Troubleshooting
Verifying Option CR3
Press the following keys on the analyzer:
MODE/MEAS, Spectrum Analyzer, OK, Mode Preset, Input/Output, RF
Calibrator, 50 MHz, FREQ, 50 MHz, Span and toggle switch to Zero Span.
Press System, Alignments, Auto Align, Off, Input/Output, Output, Aux IF Out
and select Second IF from the drop-down menu.
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 5-5.
Figure 5-5 322.5 MHz
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