Keysight NFA Series Noise Figure Analyzers Service Guide 143
RF Section Troubleshooting (N8973B, 74B, 75B Analyzers)
Troubleshooting
Disconnect the W15 or W36 cable from A13J7 on the RF Front End Assembly
(1) 322.5 MHz output. See Figure 4-2.
Figure 4-2 W15 or W36 Location
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