Keysight Technologies N5244/5B Service Manual page 130

Troubleshooting
Measurement System Troubleshooting
— If all traces are missing in all bands, the problem is most likely in the
source group. However, a missing or disabled DSP driver may exhibit the
same or similar symptoms. To verify that this DSP driver is present and
enabled:
1. Press UTILITY
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 4-37.
C, D, R3, and R4 Traces Only
The problem is in the source 2 group, go to
page 4-37.
4-36
System
the Address box, click the down arrow and then click My Computer.
In an open area of the My Computer window, click the right mouse
button and then click Properties in the resulting pop-up menu.
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 4-37.
"Source Group Tests" on page 4-37
Configure
, then , then
"Checking the Source
4-48.
"Checking the Source Group" on
"Checking the Source Group" on
Keysight N5244B/45B Service Guide
Control Panel...
. In
and perform
"Checking