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146 Keysight N9038A MXE Service Guide
Input Selection & Level Control
Input Selection & Level Control Section Troubleshooting
4.
Turn the instrument self-alignment routine off by pressing
System
,
Alignments
,
Auto Align
,
Off
.
5.
Tune the instrument to a span of 0 Hz by pressing
SPAN
,
Zero Span
.
6.
Connect a signal generator to the A10 Attenuator B RF Input. Refer to
or
.
7.
Tune the signal generator to 1 GHz with an amplitude of
−
20 dBm.
8.
Connect a spectrum analyzer to the A10 Attenuator B RF Output. Refer to
or
.
9.
Tune the spectrum analyzer to 1 GHz with a span of 1 MHz.
10.
Change the A10 Attenuator B setting to 0 dB by pressing
AMPTD
,
Attenuation
,
Mech Atten
,
0 dB
.
11.
Verify that the signal level on the spectrum analyzer is at
−
20 dBm
(±0.25 dB), 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
A10 Attenuator B assembly itself. However, before replacing an A10
Attenuator B assembly for any failure, refer to
for information on how to verify the control signals to it.
Figure 4-13
A10 Attenuator B
−
0 dB
Содержание N9038A
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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 ...
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