Service Guide 2-19
8719ET/20ET/22ET System Verification and Performance Tests
8719ES/20ES/22ES System Verification
RF Network Analyzers
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 to be
regularly tested.
If the system verification is performed with non-HP
/Agilent cables and fails, but is then
repeated with HP
/Agilent cables and passes, the non-HP/Agilent cables are at fault. It must
be documented in the comments area of the performance verification printout that
non-HP/Agilent cables were used in the system. The effects of the non-specified cables
cannot be taken into account in the system verification procedure.
See supported system configurations in Table 2-1 and Table 2-2 on page 2-18.
Calibration Kit Substitution
The accuracy of the network analyzer system is dependent on how well the standards are
defined in your calibration kit.
The measurement uncertainties for the system assume a calibration with an HP
/Agilent
calibration kit. Calibrations made with user defined or modified calibration kits are not
subject to the system specifications, although a procedure similar to the standard
verification procedure may be used.
See supported system configurations in Table 2-1 and Table 2-2 on page 2-18.
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