Keysight P937xA PXIe Service Guide 39
Tests, Adjustments, and Troubleshooting
System Verification
the calibration procedure. This part of the process can be eliminated if you
choose to load an existing recent calibration. If necessary, refer to the network
analyzer’s Help system for information on storing and recalling calibrations.
For each verification device, the analyzer reads a file from the verification disk
and sequentially measures the magnitude and phase for all four S-parameters.
Equipment Used in the System Verification Procedure
Cable Substitution
The test port cables specified for the network analyzer system have been
characterized for connector repeatability, magnitude and phase stability with
flexing, return loss, insertion loss, and aging rate. Since test port cable
performance is a significant contributor to the system performance, cables of
lower performance will increase the uncertainty of your measurement. Refer to
the plots in the cable tests (earlier in this chapter) that show the performance
of good cables. It is highly recommended that the test port cables be regularly
tested.
If the system verification is performed with a non-Keysight cable, ensure that
the cable meets or exceeds the specifications for the test cable specified in
Table 3-1. Refer to the cable’s user’s guide for specifications.
Kit Substitution
Non-Keysight calibration kits and verification kits are not recommended nor
supported.
For system verification to perform correctly, it is NECESSARY that the
verification devices be measured with their female connectors connected
to the network analyzer’s Port 1 and male connectors to Port 2.
Although the performance for all S-parameters are measured, the S11 and
S22 phase uncertainties for the attenuators and airlines are less important
for verifying system performance. Therefore, the limit lines will not appear
on the printout.
Table 3-1 Equipment Used in the System Verification Procedure
Equipment Type 3.5 mm
Calibration kit 85052B, C, D
N4691B ECal
Verification kit 85053B
Cables Single cable: 11500E
Cable pair: 11500E and 8121-2111
Adapters None required
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