210 N9030B PXA Signal Analyzer Service Guide
Front End Control Troubleshooting
A15 Front End Control Assembly Troubleshooting
Input Attenuator B Control Logic Verification (Option 503, 508, 513,
526)
Press
AMPTD
,
Attenuation 6 dB
on the analyzer and verify the 6 dB Step LED
DS17 is illuminated. Change to the input attenuation settings found in
and verify the proper LED's illuminate on the Front End Troubleshooting
board according to
If the LED's illuminate correctly, the switch control logic for the input
attenuators from the A15 Front End Control Assembly is correct. If the LED's
are not illuminating as expected, the most probable cause is the A15 Front End
Control Assembly.
Set the input attenuator back to 10 dB by pressing
AMPTD
,
Attenuation
,
10 dB
on the analyzer.
Table 6-7
Input Attenuator B LED’s
Attenuator
Setting (dB)
DS20
30 dB
Step LED
DS19
20 dB
Step LED
DS18
10 dB
Step LED
DS17
6 dB
Step LED
10
OFF
OFF
ON
OFF
16
OFF
OFF
ON
ON
20
OFF
ON
OFF
OFF
30
ON
OFF
OFF
OFF
40
ON
OFF
ON
OFF
50
ON
ON
OFF
OFF
60
ON
ON
ON
OFF
66
ON
ON
ON
ON
Содержание N9030B
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Страница 418: ...418 N9030B PXA Signal Analyzer Service Guide Replaceable Parts Hardware Figure 15 17 AIF Cables Figure 15 18 DIF Cables ...
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