2-14 Service Guide
System Verification and Performance Tests 8719ET/20ET/22ET
Preliminary Tests 8719ES/20ES/22ES
RF Network Analyzers
7. Repeat steps 4 and 5 at least three times to look for modes. (Modes appear when a
harmonic of the source fundamental frequency is able to propagate through the cable or
connector). It is helpful to be able to plot the trace each time to compare several
connections. If any mode appears each time the cable is connected and reconnected,
measurement integrity will be affected. The cable connector or cable should be repaired
or replaced. For a typical response of cable connector repeatability, see Figure 2-6.
NOTE The connector repeatability measurement should be done at the test port as
well as at the end of the test port cable.
Check PORT 2 for ES Models
8. Perform a one-port calibration on PORT 2. For detailed calibration procedures, refer to
“Calibrating for Increased Measurement Accuracy” in the analyzer user’s guide.
9. Repeat Steps 1 through 7 for PORT 2.
Figure 2-6 Typical Cable Connector Repeatability Response
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