Service Guide E8364-90026 4-33
PNA Series Microwave Network Analyzers Troubleshooting
E8362B, E8363B, E8364B Measurement System Troubleshooting
— A9 fractional-N synthesizer (Option 080 only)
— 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 4-8 on page 4-46 for a list of the frequencies associated with each of the
network analyzer’s 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,
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 4-35.
• If the trace faults are band-related, the problem is in the source group. Using Table
4-8 on page 4-46, note the frequency bands in which problems are seen. Go to “Checking
the Source Group” on page 4-35 and check the A8 fractional-N synthesizer board
outputs and the A10 frequency reference board outputs.
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