174 Keysight NFA Series Noise Figure Analyzers Service Guide
RF Section Troubleshooting (N8973B, 74B, 75B Analyzers)
Troubleshooting
If the Reference Assembly calibrator is functioning properly the 4.8 GHz
calibrator signal will measure 4.8 GHz at −28 dBm ± 3 dB as shown in Figure
4-23. If this level is incorrect, the Reference Assembly is most likely defective.
Reconnect W19 at A9 (1).
Figure 4-23 4.8 GHz Calibrator Signal
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