Keysight N9038A MXE Service Guide 287
Front End Control
A15 Front End Control Assembly Troubleshooting
10.
Verify that the voltage levels of test points In1A, In1B, In2A, and In2B
for a Frequency of
1 GHz
(±0.5V).
If the test point voltages are correct proceed to the next step. If not, there
is most likely a problem with the A15 Front End Control assembly.
11.
Tune the instrument to a frequency of 4 GHz by pressing
FREQ
,
4 GHz
.
12.
Verify that the voltage levels of test points In1A, In1B, In2A, and In2B
for a Frequency of
4 GHz
(±0.5V).
If the test point voltages are correct proceed to the next step. If not, there
is most likely a problem with the A15 Front End Control assembly.
13.
Turn off the RF Preselector by pressing
Input/Output
,
RF Input
,
RF
Preselector
,
Off
.
14.
Turn the High Band Preamp on by pressing
AMPTD
,
More
,
Internal
Preamp
,
Full Range
.
15.
Verify that the voltage levels of test points In1A, In1B, In2A, and In2B
for a Frequency of
4 GHz w/ Preamp
(±0.5V).
If the test point voltages are correct proceed to the next step. If not, there
is most likely a problem with the A15 Front End Control assembly.
16.
If no trouble has been found with the control logic coming from the A15
Front End Control assembly, yet there is still a problem with the A11 RF
Switch / High Band Preamp assembly, refer to
for further troubleshooting information on the
A11 RF Switch / High Band Preamp assembly itself.
Table 8-7
A11 RF Switch / High Band Preamp Control Voltage
Frequency
In1A
In2A
In1B
In2B
1 GHz
−
10V
−
10V
+10V
+10V
4 GHz
+10V
−
10V
−
10V
+10V
4 GHz w/ Preamp
+10V
+10V
−
10V
−
10V
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 ...
Страница 268: ...268 Keysight N9038A MXE Service Guide L O Synthesizer A14 L O Synthesizer Assembly Troubleshooting ...
Страница 354: ...354 Keysight N9038A MXE Service Guide Analog Digital IF A3 Digital I F Troubleshooting ...
Страница 406: ...406 Keysight N9038A MXE Service Guide Block Diagrams Block Diagrams Block Diagrams ...
Страница 407: ...Keysight N9038A MXE Service Guide 407 Block Diagrams Block Diagrams N9038A RF Input Option 503 508 526 Block Diagram ...
Страница 408: ...408 Keysight N9038A MXE Service Guide Block Diagrams Block Diagrams N9038A RF Input Option 544 Block Diagram ...
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 ...
Страница 430: ...Keysight N9038A MXE Service Guide 449 Block Diagrams Block Diagrams MXE Computer 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 ...
Страница 589: ...608 Keysight N9038A MXE Service Guide Assembly Replacement Procedures Motherboard Assembly Figure 18 57 Bottom Screws ...
Страница 627: ...646 Keysight N9038A MXE Service Guide Post Repair Procedures Post Repair Procedures ...
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Страница 643: ...662 Keysight N9038A MXE Service Guide Instrument Software Software Updates ...
Страница 741: ...760 Keysight N9038A MXE Service Guide Tests Intermittent Unsteady Drifting Disturbances ...