256
Keysight NFA Series Noise Figure Analyzers Service Guide
Analog/Digital IF Troubleshooting
25 MHz BW IF Section
Verifying the 22.5 MHz Output Power
1.
Turn the instrument off.
2.
Turn the instrument over so the bottom side of the analyzer is facing up.
3.
Turn on the NFA and wait for the instrument to complete the boot up
process.
4.
Press
System
,
Alignments
,
Auto Align
,
Off
.
5.
Press
Input/Output
,
RF calibrator
,
50 MHz
.
6.
Verify the 50 MHz signal is at
−
25 dBm by pressing
MODE/MEAS
,
Spectrum Analyzer
,
OK
,
FREQ
,
50 MHz
,
Span
,
1 MHz
,
Peak Search
on the
analyzer. The marker readout should be 50 MHz at
−
25 dBm
±
3 dBm. If
this reference signal is measuring incorrectly, see
Troubleshooting (N8973B, 74B, 75B Analyzers)”
7.
To continue verifying press
FREQ
,
Zero Span
. Verify the input attenuator
on the NFA is set to 10 dB. Look near the top of the display near the center
and verify that
Atten: 10 dB
is visible. If needed change the input
attenuator by pressing
AMPTD
,
Attenuation
,
Mech Atten 10 dB
on the
analyzer.
8.
, carefully disconnect the W13 cable at A3J15.
Figure 7-3
A3 Digital I.F. Cables
Содержание N8973B
Страница 4: ...4 ...
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 ...