Keysight NFA Series Noise Figure Analyzers Service Guide
169
RF Section Troubleshooting (N8973B, 74B, 75B Analyzers)
Troubleshooting
If all the power levels and biasing from the A15 Front End Control Assembly
measure correctly up to this point, the most probable cause would be the A13
RF Front End Assembly.
Quick Check to Verify High Band RF Path #1
(RF Input Frequencies > 3600 MHz and < 13.6 GHz)
Refer to
for details.
Equipment needed:
Functioning Spectrum Analyzer
Functioning Signal Generator to 15 GHz
DVM
Cables & Connectors
Turn the analyzer on and allow it to complete its full boot up process to Signal
Analyzer mode. Use the internal 4.8 GHz,
−
28 dBm calibrator signal as a
reference for troubleshooting by pressing
Mode Preset
,
Input/Output
,
RF
Calibrator
,
4.8 GHz
on the analyzer. Now press
FREQ
,
4.8 GHz
,
Zero Span
,
AMPTD
,
Attenuation, Mech Atten,
10 dB
on the analyzer.
IMPORTANT
Turn off auto align by pressing
System
,
Alignments
,
Auto Align
,
Auto Align,
Off
.
To perform the following checks, it will be necessary to remove the outer
cover and the top brace. See
for removal procedures.
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 ...