Keysight NFA Series Noise Figure Analyzers Service Guide 213
RF Section Troubleshooting (N8976B)
Troubleshooting
If this power level is incorrect remove W6 at A14J200. Refer to
Adjust the functioning spectrum analyzer to measure a signal at 4.800 GHz at
+4.5 dBm
±
2 dB. See
.
Figure 5-6
4.800 GHz Signal at A14J200
If this power level is incorrect, the most probable cause is the A16 Reference
Assembly. If this level is correct and yet the signal previously measured at
A14J740 is incorrect, the most probable cause is the A14 L.O. Synthesizer
Assembly. Reconnect W4 cable to A14J740. Reconnect W6 cable to A14J200.
A13 Front End Assembly Verification
Many portions of the Front End Assembly have been verified earlier in the Low
Band troubleshooting process outlined above.
The input signal level was measured on W3 as part of the A11 Low Band
Switch verification.
The output signal level was measured at A13J7 during the quick check to verify
the Low Band Signal Path.
The A13 Front End assembly is shown as A13 and A13A1 for troubleshooting clarification.
However, A13A1 is not separately replaceable. The entire A13 assembly must be replaced which
includes A13A1.
Содержание N8973B
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Страница 44: ...44 Keysight NFA Series Noise Figure Analyzers Service Guide Overview How to Return Your Instrument for Service ...
Страница 132: ...132 Keysight NFA Series Noise Figure Analyzers Service Guide Instrument Messages Condition Messages ...
Страница 228: ...228 Keysight NFA Series Noise Figure Analyzers Service Guide RF Section Troubleshooting N8976B Troubleshooting ...
Страница 268: ...268 Keysight NFA Series Noise Figure Analyzers Service Guide Analog Digital IF Troubleshooting 25 MHz BW IF Section ...
Страница 322: ...322 Keysight NFA Series Noise Figure Analyzers Service Guide Block Diagrams Block Diagrams Block Diagrams ...
Страница 332: ...332 Keysight NFA Series Noise Figure Analyzers Service Guide Block Diagrams Block Diagrams NFA Computer Block Diagram ...
Страница 350: ...350 Keysight NFA Series Noise Figure Analyzers Service Guide Service and Diagnostics Menus Front Panel Key Test ...
Страница 470: ...470 Keysight NFA Series Noise Figure Analyzers Service Guide Assembly Replacement Procedures Front Frame Assembly ...