Keysight Technologies N5224A Service Manual page 105

Troubleshooting
Measurement System Troubleshooting
2. If the entry is not present or if the icon to the left of the name is a
3. If you have verified that the DSP driver is present and enabled, but all
— If the traces exhibit power drops in some frequency bands, the problem is
in the source group. Go to
the tests that correspond to the problems seen.
Single Trace (A, B, C, D, R1, R2, R3, or R4) Only
If the trace is missing in all bands or has notches or roll-off, go to
the Signal Separation Group" on page
A, B, R1, and R2 Traces Only
The problem is in the source 1 group, go to
page 4-34.
C, D, R3, and R4 Traces Only
The problem is in the source 2 group, go to
page 4-34.
Keysight N5224A/25A Service Guide
Click the Hardware tab, click Device Manager, and then expand
Keysight PNA DSP Device in the resulting list. The following entry
should be listed: Keysight Technologies DSP Driver #2 and should
be enabled.
yellow box containing an exclamation mark (!), navigate the following
directories and verify the presence of the following file:
C:\WINNT\system32\drivers\spampnp.sys.
traces are still missing in all bands, go to
Group" on page 4-34.
"Source Group Tests" on page 4-34
"Checking the Source
4-39.
"Checking the Source Group" on
"Checking the Source Group" on
and perform
"Checking
4-33