Keysight N9038A Service Guide

142 Keysight N9038A MXE Service Guide
Input Selection & Level Control
Input Selection & Level Control Section Troubleshooting
Attenuation Selection
20.Turn on the Marker Delta function of the spectrum analyzer being used.
21.Change the A9 Attenuator A setting to 2 dB by pressing AMPTD,
Attenuation, Mech Atten, 2 dB.
22.Verify that the signal level on the spectrum analyzer drops by 2 dB from
where it was, as shown in Figure 4-8.
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.
Figure 4-8 A9 Attenuator A −2 dB
23.Change the A9 Attenuator A setting to 4 dB by pressing AMPTD,
Attenuation, Mech Atten, 4 dB.
24.Verify that the signal level on the spectrum analyzer drops by 4 dB from
where it was, as shown in Figure 4-9.
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.

Keysight N9038A Specifications

General

Brand	Keysight
Model	N9038A
Category	Measuring Instruments
Language	English