Keysight NFA Series Noise Figure Analyzers Service Guide
257
Analog/Digital IF Troubleshooting
25 MHz BW IF Section
9.
Connect the W13 cable to the MMCX female to SMA female connector.
Use an appropriate cable to go from the SMA connector to the RF input of
a functioning spectrum analyzer to verify the 22.5 MHz I.F. and amplitude
is correct.
10.
Press
Freq
,
22.5 MHz
,
Span
,
1 MHz
,
Peak Search
on the functioning
spectrum analyzer.
11.
The analyzer marker should read 22.5 MHz at
−
25 dBm
±
4 dBm as shown
in
.
Figure 7-4
A2 Analog I.F. Output
If the 22.5 MHz signal is not measuring the correct power level, do not assume
the Analog I.F. is the most probable cause until the 3rd L.O. frequency and
power level have been verified below.
If the 22.5 MHz signal is within tolerance, carefully reconnect the W13 cable.
You should hear a distinct snap when reconnecting the W13 cable. If this
cable is not installed properly, intermittent signal fluctuations may occur
on the analyzer display.
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 ...