134
Keysight NFA Series Noise Figure Analyzers Service Guide
RF Section Troubleshooting (N8973B, 74B, 75B Analyzers)
RF Section Description
RF Section Description
Purpose
This section covers only those model numbers listed below for the NFA Series
Noise Figure Analyzers.
— N8973B (10 MHz - 3.6 GHz)
— N8974B (10 MHz - 7 GHz)
— N8975B (10 MHz - 26.5 GHz)
— N8976B (10 MHz - 40 GHz)
The RF input signal can be routed through three different front end signal
paths. These various paths are switched in and out based on where the signal
analyzer center frequency is tuned.
1.
Low band RF path is used when the input frequency is
≤
3600 MHz
2.
High band RF path #1 is used when the input frequency is > 3.6 GHz to
13.6 GHz
3.
High band RF path #2 is used when the input frequency is > 13.6 GHz to
26.5 GHz
The RF section is designed to convert RF input signals to an intermediate
frequency (IF) that is present at the RF output of the A13 Front End assembly.
This IF depends on installed options and the IF path selected. This chapter will
assume the analyzer is in Spectrum Analyzer mode. Therefore, the IF will be
322.5 MHz.
IF Path
IF
Mode
10 MHz (standard)
322.5 MHz
Spectrum Analyzer or
IQ Analyzer
25 MHz (Option B25)
322.5 MHz
IQ Analyzer
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 ...