Keysight Technologies N9040B UXA Signal Analyzer Service Guide 205
Analog/Digital IF Troubleshooting
A3 Digital IF Troubleshooting
13.The analyzer marker should read 250 MHz at −30 dBm ± 4 dB as shown in
Figure 6-12.
Figure 6-10 250 MHz IF Input
14.If the 250 MHz signal is not measuring the correct power level, see “A15
Front End Control Assembly Troubleshooting” on page 171 in this service
guide.
15.If the 250 MHz signal is within tolerance, carefully reconnect the W26 or
W40 cable to A3J15.
You should hear a distinct snap when reconnecting the cable. If this cable is not installed
properly, intermittent signal fluctuations may occur on the analyzer display.
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