4-30 Service Guide N5230-90014
Troubleshooting PNA Series Microwave Network Analyzers
Measurement System Troubleshooting N5230A
To verify that this DSP driver is present and enabled:
1. Click My Computer,
Properties, Hardware tab, Device Manager. Expand Network
Adapters
. The following entry should be listed: Agilent Technologies DSP Driver #2 and
should be enabled.
2. If the icon to the left of the name is a yellow box containing an exclamation mark (!),
use Windows Explorer to verify the presence of the following file:
C:\WINNT\system32\drivers\spampnp.sys.
3. If you have verified that the DSP driver is present and enabled, but all traces are
still missing in all bands, go to “Checking the Source Group” on page 4-31.
• If the trace faults are band-related, the problem is in the source group. Using Table
4-7 on page 4-39, note the frequency bands in which problems are seen. Go to “Source
Group Tests” on page 4-36 and perform the band-specific tests that correspond to the
bands in which the problems are seen.
R1 Trace Only
A problem that affects only the R1 trace is isolated to the A20 mixer brick or the A5 SPAM
board. Go to “Checking the Receiver Group” on page 4-45.
R2 Trace Only
A problem that affects only the R2 trace is isolated to the A20 mixer brick or the A5 SPAM
board. Go to “Checking the Receiver Group” on page 4-45.
A Trace Only
If the trace is missing in all bands, go to “Checking the Signal Separation Group” on
page 4-42.
B Trace Only
If the trace is missing in all bands, go to “Checking the Signal Separation Group” on
page 4-42.
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