Keysight Technologies 11644A K, User'S And Service Manual

Page: 41 / 72

X, P, and K 11644A 5-5
Performance Verification
Performance Test
4. Set the averaging factor to 512.
5. At the adapter test port, perform a 2–port TRL calibration.
6. Turn on the calibration.
7. Connect the termination you wish to test to port 1.
8. Measure the return loss (S
11
) of the load.
9. After one complete measurement sweep, the displayed trace should look similar to that shown in
Figure 5-2 .
10. If necessary, update the trace.
11. Use a marker to determine the maximum value on the trace. This marker determines worst-case return
loss.
Figure 5-2 Typical Termination Return Loss
In Case of Failure
If a termination fails this test, clean all flanges and carefully reconnect the devices. Repeat the test. If the
termination fails again, replace it. Refer to “Electrical Specifications” on page 2-5 .