Keysight Technologies X Series Service Manual page 195

RF Section Troubleshooting (RF/Microwave Analyzers)
Troubleshooting
1. It may be difficult to measure the higher attenuator settings using the −28 dBm internal
calibrator signal. Use an external source with the frequency set to 4.8 GHz and adjust the output
level to 0 dBm. This will increase the measured power levels noted in the table above by 28 dB.
2. Tolerances should be used as a guideline.
If the power levels measure correctly, reconnect the W9 cable and reset the
input attenuation to 10 dB by pressing Mech Atten, 10 dB on the analyzer.
If either of these levels measure incorrectly, Input Attenuator B is the most
probable cause, provided the switch control logic has been verified.
Keysight N9010A EXA Service Guide 195