Keysight N9038A MXE Service Guide 143
Input Selection & Level Control
Input Selection & Level Control Section Troubleshooting
Figure 4-9 A9 Attenuator A −4 dB
25.If the instrument has Option 503, 508, or 526 skip to step 28.
26.Change the A9 Attenuator A setting to 6 dB by pressing AMPTD,
Attenuation, Mech Atten, 6 dB.
27.Verify that the signal level on the spectrum analyzer drops by 6 dB from
where it was, as shown in Figure 4-10.
If the signal level is incorrect the most likely cause of the problem is the A9
Attenuator A assembly itself. However, before replacing an A9 Attenuator
A assembly for any failure, refer to Chapter 8, “Front End Control.” for
information on how to verify the control signals to it.
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