214 Keysight NFA Series Noise Figure Analyzers Service Guide
RF Section Troubleshooting (N8976B)
Troubleshooting
The Second LO input was tested during the Second LO Verification.
The LO input at W4, and the LO outputs were tested when performing the First
LO Verification.
It is possible to measure the A13W1 input cable to A13A1 where it connects to
A13A1J2, and the output of the A13A1 at A13W2 where it connects to A13J11.
A13A1 IF Band Pass Filter is not separately replaceable, but being able to
determine where the signal level is faulty, can aid in verifying the faulty
assembly. See the block diagram for signal levels.
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