Keysight NFA Series Noise Figure Analyzers Service Guide
141
RF Section Troubleshooting (N8973B, 74B, 75B Analyzers)
RF Section Description
Front End Control Assembly
Provides the correct biasing and switch control logic to the following RF
assemblies:
— Input Attenuator A
— Input Attenuator B
— Low Band Switch
— YTF Preselector (Input signals > 3.6 GHz)
— RF Front End Assembly
— High Band Preamplifier
— Low Band Preamplifier
Table 4-2
A13 RF Front End Signals
Signal Name
Description
From
To
RF Input
9 kHz to 3.59 GHz RF Input
A11J2, Low Band Switch
A13J2
Microwave Input
3.6 GHz to 26.5 GHz
U-wave RF Input
YTF Output
A13J9
E-cal Input
Cal Signal Port
A16J705, Ref. Bd
A13J6
1st L.O. Input
3.8225 to 8.7225 GHz 1st L.O.
A14J40, Synth. Bd
A13J4
2nd L.O. Input
4.8 GHz 2nd L.O.
A16J702, Ref Bd
A13J1
I.F. Output
322.5 MHz I.F. Signal
A13J7
A2J100, AIF or
A15J902, EFEC
To Band Pass Filter
Filter Port, 1st I.F.
Amplifier Output
A13J10
5.1225 GHz Cavity
Input
From Band Pass Filter
Filter Port, 2nd Mixer Input
5.1225 GHz Cavity Output
A13J11
Chapter 6, “Front End Control Troubleshooting.”
for detailed
descriptions & troubleshooting 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 ...