Signal Level Problem With Input Frequencies > 3.6 Ghz - Keysight n9020a Service Manual

Boot Up and Initialization Troubleshooting
Signal Level Verification
Signal Level Problem with
Input Frequencies > 3.6 GHz
Measure the 4.8 GHz RF calibrator signal level by pressing Input/Output, {RF
Calibrator}, 4.8 GHz. Now press Freq, 4.8 GHz, SPAN, 1 MHz, Peak Search. If
the analyzer is functioning correctly in high band, the 4.8 GHz calibrator level
should be −28 dBm ± 2 dB. See the figure below.
Is the signal level correct?
If yes:
If no:
It is possible that other input frequencies > 3.6 GHz could have an amplitude
NOTE
problem even though the 4.8 GHz calibrator is within tolerance. Using the
internal RF calibrator provides a quick check of the high band path.
The analyzer high band path is functioning properly at least at 4.8 GHz.
Refer to Chapter 4, "RF Section Troubleshooting"
71
in this manual.