164 Keysight NFA Series Noise Figure Analyzers Service Guide
RF Section Troubleshooting (N8973B, 74B, 75B Analyzers)
Troubleshooting
Input Attenuator B Power Level Verification
Press AMPTD, Attenuation, Mech Atten, 0 dB. Remove output cable W9 from
A10 (2). Refer to Figure 4-13. Measure the 50 MHz calibrator signal on the
output of the attenuator using a functioning Spectrum Analyzer.
The level should be −25 dBm ± 2 dB as shown in Figure 4-15.
Figure 4-15 50 MHz Calibrator Signal on Output of Attenuator B
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