Agilent Technologies E8362C Service Manual page 108

Troubleshooting
Measurement System Troubleshooting
— A10 frequency reference
— A12 source 20
— A13 frequency offset receiver (Option 080 only)
— A45 and A46 switches (Option 081 only)
Use the list on the following pages to help you determine in which analyzer functional group to begin
troubleshooting.
This is by no means an exhaustive list of possible symptoms nor possible failures. It is recommended that
you view the system block diagram, located at the end of this chapter, as you review the entries in this list
and while performing any of the troubleshooting procedures listed.
Good judgement and established logical troubleshooting techniques must be used to complement the
procedures contained in this section.
Refer to Table 4-4 on page 4-36
26 bands.
All Traces
• 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. Click My Computer,
following entry should be listed:
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
• If the trace faults are band-related, the problem is in the source group. Using
note the frequency bands in which problems are seen. Go to
and check the A8 fractional-N synthesizer board outputs and the A10 frequency reference board outputs.
4-28
for a list of the frequencies associated with each of the network analyzer's
, tab,
Properties Hardware
Agilent Technologies DSP Driver #2
PNA Series Microwave Network Analyzers
. Expand
Device Manager
and should be enabled.
4-30.
"Checking the Source Group" on page 4-30
E8362C, E8363C, E8364C
. The
Agilent PNA DSP device
Table 4-4 on page 4-36,
Service Guide E8364-90038