Keysight NFA Series Noise Figure Analyzers Service Guide 193
RF Section Troubleshooting (N8973B, 74B, 75B Analyzers)
Troubleshooting
Low Band Switch Power Level Verification
(for High Band)
Refer to Figure 4-33. Carefully disconnect both ends of the W8 cable at A11J3
and A12 (1) input.
Figure 4-33 W8 Location
Press MODE/MEAS, Spectrum Analyzer, OK, Input/Output, RF Calibrator,
4.8 GHz, AMPTD, Attenuation, Mech Atten, 10 dB, FREQ, 4.8 GHz, Zero Span
on the analyzer.
Be careful not to short out components on the front panel interface board
or the components on top of the A12 YTF Preselector when removing W8.
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