Measurement System Troubleshooting; Before You Begin-Consider: Where Do You See A Problem - Agilent Technologies N5242A Service Manual

PNA Series Microwave Network Analyzers
N5242A

Measurement System Troubleshooting

This section provides troubleshooting procedures for the measurement portion of the PNA.
In this section, the analyzer is used as a tool to help isolate the suspected faulty functional
group. Once the faulty functional group is determined, troubleshooting steps are provided
to help you isolate the faulty assembly or part.
Before you begin—consider: Where do you see a problem?
If you are seeing a problem at
troubleshooting procedure, starting with:
S-Parameter Mode)" on page
You should also consider the problem indications that are observed and whether the
observed condition is a soft failure or a hard failure.
Soft Failure
With a soft failure, the network analyzer's performance has degraded to an unacceptable
level, yet it continues to operate and displays no error messages. For this type of failure,
performance tests must be conducted to isolate the problem. Begin with viewing the error
terms as described in
additional tests are required, refer to
Hard Failure
With a hard failure, the PNA does not perform well and displays one or more error
messages. To diagnose and repair a hard failure:
• Check "Help About"
actual analyzer model and options.
• Check "EEPROM Headers"
• Check error messages. Refer to
there for each applicable error message.
Help About
Go to the Help About screen by pressing UTILITY
Verify that the information displayed in this screen is correct for your analyzer. If any of
the information is incorrect, contact Agilent Technologies. Refer to
page 2-13.
Service Guide N5242-90001
, perform the standard S-parameter test set
Preset
"Verifying the A, B, C, D, and R Traces (Standard
4-25.
"Error Terms" on page
"Performance Tests" on page
to verify that the model number and options listed match the
to verify that the data there is correct.
"Error Messages"
Measurement System Troubleshooting
8-3. This will help to isolate most problems. If
and follow the suggestions outlined
System
, then
Troubleshooting
3-28.
, then
Help About NA...
"Contacting Agilent" on
4-23
.