Keysight Technologies X Series Service Manual page 170

RF Section Troubleshooting (RF/Microwave Analyzers)
Troubleshooting
If the analyzer is equipped with Option FSA, press Mech Atten and enter 6 dB.
The 50 MHz calibrator signal measured on the functioning Spectrum Analyzer
should measure 6 dB lower than the previous step (~−31 dBm) as shown in
Figure
Figure 4-16 50 MHz Calibrator Signal on Output of Attenuator B
(with 6 dB Attenuation)
Press Mech Atten and enter 10 dB. The 50 MHz calibrator signal measured on
the functioning Spectrum Analyzer should measure 10 dB lower than the first
step (~−35 dBm). Continue testing all the attenuation settings as described in
Table
170
4-16.
4-10.
Table 4-10
Attenuator Setting (dB)
a
16
20
30
40
50
60
a. Requires Option FSA
Expected Level
(dBm @ 50 MHz)
−41
−45
−55
−65
−75
−85
Keysight N9010A EXA Service Guide
Tolerance
±3 dB
±3 dB
±3 dB
±4 dB
±4 dB
±4 dB