186
Keysight NFA Series Noise Figure Analyzers Service Guide
RF Section Troubleshooting (N8973B, 74B, 75B Analyzers)
Troubleshooting
If any of the preselector control currents do not match the levels in
the most probable causes are a misaligned YTF or the A15 Front End Control
Assembly. Perform the YTF characterization (press
System
,
Alignments
,
Ad vanced
,
Characterize Preselector
) and re-check the control current at
various center frequencies.
In order to measure the control current correctly, press
Restart
on the
analyzer in between each measurement.
Table 4-16
YTF Tune Current
Center Frequency
(GHz)
Control Current
(mA)
Tolerance
(mA)
5.0
106
±
20
10
a
a. N8975B/76B
215
±
25
15
324
±
30
20
430
±
40
26
560
±
50
Tolerances should be used as a guideline. The true test is whether or not
the analyzer will function and meet published specification.
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 ...