Keysight NFA Series Noise Figure Analyzers Service Guide
189
RF Section Troubleshooting (N8973B, 74B, 75B Analyzers)
Troubleshooting
If any of the voltages measured do not match the levels in
, the most
probable cause is the A15 Front End Control Assembly. Once the switch control
logic has been verified, turn off the instrument. Disconnect the RF Front End
Troubleshooting board cables, and reconnect the analyzer cables to the A15
Front End Control Assembly. Turn the instrument on and allow it to complete
its full boot up process to Spectrum Analyzer mode.
Input Attenuator A Power Level Verification
Press
MODE/MEAS
,
Spectrum Analyzer
,
OK
,
Mode Preset
,
Input/Output
,
RF
Calibrator
,
4.8 GHz
,
AMPTD
,
Attenuation
,
Mech Atten, 0 dB
on the analyzer.
Refer to
, remove cable W11 from A9
(1)
Output. Measure the
4.8 GHz calibrator signal on the output of the attenuator using the proper high
frequency cables and connect to the functioning Spectrum Analyzer.
Figure 4-30
W9 and W11 Location
Tolerances should be used as a guideline.
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 ...