Keysight Technologies N9040B UXA Signal Analyzer Service Guide 251
Hardware Options
Option H1G, 1 GHz Analysis Bandwidth Assembly
If the 4.8 GHz calibrator signal is not at the correct level in the 1 GHz IF path,
check the calibrator signal level when using the 255 MHz IF path. Press
Meas
Setup
,
IF Path
and chose
255 MHz
or
40 MHz
.
Verify the 4.8 GHz calibrator signal amplitude is about -28 dBm. If the signal
level is now correct you have verified the problem is in the 1 GHz IF path.
If the signal level is not correct, the problem could be a faulty calibrator signal
or some problem in the Front End or IF distribution chain. Go back to
Spectrum Analyzer
mode and troubleshoot using the 50 MHz and 4.8 GHz
calibrator signals.
If the problem is only seen in the 1 GHz IF path, connect a spectrum analyzer
to the sma rear panel IF 2 Out, that will allow you to measure the signal level
out of the 1 GHz Analog IF assembly.
Assure the 1 GHz path is being used. Select
IQ Analyzer
mode. Press
Meas
Setup
,
IF Path
,
1 GHz
. Assure the 4.8 GHz calibrator is on.
Enable the rear panel IF 2 Output by pressing
Input/Output
,
Output
,
IF 2 Out
and select
On
. You will see a message on the UXA screen that says 'No Result,
measure invalid with IF 2 out set to on" This is because a switch on the 1 GHz
IF assembly routed the 750 MHz IF signal to the rear panel and NOT through
the rest of the internal signal path.
Set up the measuring spectrum analyzer as shown in
. Notice the
750 MHz signal measures -10 dBm.
Figure 11-7
Spectrum Analyzer Connected to Rear Panel IF 2 Out
Содержание N9040B Option 513
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Страница 138: ...138 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Instrument Messages Condition Messages ...
Страница 240: ...240 Chapter 11 Hardware Options A21 Wideband Analog IF Troubleshooting Figure 11 1 Analog IF Block Diagram ...
Страница 256: ...256 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Block Diagrams Block Diagrams Block Diagrams ...
Страница 306: ...306 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Replaceable Parts Figure 14 2 External Hardware ...
Страница 338: ...338 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Replaceable Parts Figure 14 28 Chassis ...
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Страница 502: ...502 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Post Repair Procedures ...
Страница 532: ...532 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Functional Tests Scale Fidelity ...
Страница 536: ...536 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Instrument Software Software Updates ...
Страница 541: ...Index Index 541 Y yellow LED 48 51 yig filter see A12 YTF YTF see A12 YTF ...