3-24 Keysight N5221A/22A Service Guide
Tests and Adjustments
System Verification
3-
choose to load an existing recent calibration. If necessary, refer to the
analyzer’s on-line embedded help 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 the
previous table, “Equipment Used in the System Verification Procedure.” Refer
to the cable’s user’s guide for specifications.
For system verification to perform correctly, it is NECESSARY that the
verification devices be measured with their female connectors connected
to the analyzer’s test ports.
Although the performance for all S-parameters are measured, the S
11
and
S
22
phase uncertainties for the attenuators and airlines are less important
for verifying system performance. Therefore, the limit lines will not appear
on the printout.
Equipment Type
3.5 mm Type-N
Calibration kit 85052B, C, D
N4691A E-cal
85054B/D
N4690A E-cal
Verification kit 85053B 85055A
Cables Single cable: 85131C/E
Cable pair: 85131D/F
Single cable: 85132C/E (3.5 mm NMD to 7 mm)
Cable pair: 85132D/F (3.5 mm NMD to 7 mm)
Adapters None required. With single cable: an 85130C adapter and a 7mm to Type-N
adapter from the 85054B calibration kit.
With cable pair: Two 7mm to Type-N adapters from the 85054B
calibration kit.
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