192 Keysight N9038A MXE Service Guide
RF Preselector Section
RF Preselector Section Troubleshooting
Verifying Signal Through Path
1.
Remove the instrument dress cover (MP24) and the top brace (MP10).
Refer to
Chapter 16, “Service and Diagnostics Menus”
for instructions on
removing these covers.
2.
, remove W31 and W36 from the A21 RF
Preselector Input assembly.
3.
Turn the instrument on and allow it to complete its boot up process,
ignoring any error messages.
4.
Turn the instrument self-alignment routine off by pressing
System
,
Alignments
,
Auto Align
,
Off
.
5.
Connect a signal generator to the A21 RF Preselector Input assembly RF
Input (J100), as shown in
.
6.
Set the signal generator to an amplitude of
−
20 dBm.
7.
Connect a spectrum analyzer to the A21 RF Preselector Input assembly RF
Output (J101), as shown in
8.
Tune the spectrum analyzer to a start frequency of 0 Hz and a stop
frequency of 3.6 GHz.
9.
Tune the A21 RF Preselector Input assembly to the through path by
entering the Service menu and pressing
More
,
RF Preselector
,
Band Lock
,
Through
,
Band 3
.
10.
Place one of the active traces on the spectrum analyzer into its Max Hold
function.
11.
Slowly vary the frequency of the signal generator between 0 Hz and
3.6 GHz to verify the frequency response of the through path on the
spectrum analyzer display, as shown in
.
12.
Verify that the signal level on the spectrum analyzer is between
−
25 dBm
and
−
30 dBm (±3 dB) across the frequency range, as shown in
allowing for any additional test cable loss.
If the signal level is incorrect the most likely cause of the problem is the
A21 RF Preselector Input assembly itself.
For information on how to access the instrument's Service menu see
.
Содержание N9038A
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Страница 16: ...16 Contents ...
Страница 66: ...66 Keysight N9038A MXE Service Guide Boot Up and Initialization Potential Problems During Boot Process ...
Страница 130: ...130 Keysight N9038A MXE Service Guide Instrument Messages Condition Messages ...
Страница 216: ...216 Keysight N9038A MXE Service Guide RF Preselector Section RF Preselector Section Troubleshooting ...
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Страница 407: ...Keysight N9038A MXE Service Guide 407 Block Diagrams Block Diagrams N9038A RF Input Option 503 508 526 Block Diagram ...
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Страница 428: ...Keysight N9038A MXE Service Guide 447 Block Diagrams Block Diagrams LO Synthesizer Block Diagram ...
Страница 429: ...448 Keysight N9038A MXE Service Guide Block Diagrams Block Diagrams Reference Block Diagram ...
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Страница 436: ...Keysight N9038A MXE Service Guide 455 Service and Diagnostics Menus Service Menus Figure 16 5 Alignments Menu ...
Страница 500: ...Keysight N9038A MXE Service Guide 519 Replaceable Parts Hardware Figure 17 23 Front Frame Exploded View LED Backlight ...
Страница 504: ...Keysight N9038A MXE Service Guide 523 Replaceable Parts Hardware Figure 17 26 Front Frame Exploded View CCFL Backlight ...
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