Keysight NFA Series Noise Figure Analyzers Service Guide 165
RF Section Troubleshooting (N8973B, 74B, 75B Analyzers)
Troubleshooting
Since the analyzer is equipped with standard 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 4-16.
Figure 4-16 50 MHz Calibrator Signal on Output of Attenuator B
(with 6 dB Attenuation)
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