Keysight N9038A, Service Manual

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208 Keysight N9038A MXE Service Guide
RF Preselector Section
RF Preselector Section Troubleshooting
20. Verify that the through path gain or loss is equal to the Typical Path
Gain/Loss shown in Table 5-11 for Band 0, and that the frequency
response shape is similar to that shown in Figure 5-43 .
If either the path loss or frequency response shape is incorrect the most
likely cause of the problem is the A24 Conducted Filter assembly itself.
21. Repeat step 15 through step 20 for the Band 1 through path, using the
Verification Start Frequency, Verification Stop Frequency, and Typical
Passband Gain/Loss shown in Table 5-11 for Band 1.
Verify that the path gain for band 1 is similar to that shown in Figure 5-44 .
Figure 5-30 A24 Conducted Filter Assembly - Band 0 Filter Path
Table 5-11 A24 Conducted Filter Assembly - Through Signal Paths
Service Menu
Selection
Frequency Range Verification
Start Frequency
Verification
Stop Frequency
Typical Passband
Gain/Loss
Band 0
a
20 Hz to 2 MHz 0 Hz 30 MHz − 1.00 dB
Band 1
a 2 MHz to 30 MHz 0 Hz 100 MHz +3.0 dB
a. Not used during normal instrument operation.