182 Keysight Technologies N9040B UXA Signal Analyzer Service Guide
Front End Control Troubleshooting
A15 Front End Control Assembly Troubleshooting
Verifying Option CRP
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, More 1 of 2,
Output Config, Aux IF Out, Arbitrary IF.
The default is 70 MHz, which can be measured on a functioning spectrum
analyzer. The amplitude level should be −35 dBm ±3 dB as per Figure 5-6. You
can select Arbitrary IF Freq and vary the I.F. from 10 MHz to 70 MHz in 500 kHz
steps and measure the Aux IF output. The amplitude level should remain fairly
flat across the entire arbitrary IF output range.
Figure 5-6 70 MHz
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