After each selection, the message “Measuring
SHORT 1,” “Measuring SHORT 2,” or “Measur-
ing LOAD” appears while the measurement is in
progress.
NOTES:
For best calibration results — compensation for all
measurement system uncertainties — ensure that the
Open/Short/Load (Short 1/Short 2/Load for
waveguide) is at the end of the test port or optional
extension cable; that is, at the same point that you will
connect the antenna or device to be tested.
For best results, use a phase stable Test Port Exten-
sion Cable (see Optional Accessories). If you use a
typical laboratory cable to extend the
Site Master
test
port to the device-under-test, cable bending subse-
quent to the Open/ Short/Load calibration will cause
uncompensated phase reflections inside the cable.
Thus, cables which are NOT phase stable may cause
measurement errors that are more pronounced as the
test frequency increases.
For optimum calibration, ANRITSU recommends using
precision calibration components.
Making a Measurement
Step 10.
Connect the cable to be tested to the Site Master
Test Port or the end of the Test Port Extension Cable
(if used).
Step 11. Place an Open or Short at the other end of the cable.
Step 12. Observe the displayed cable loss vs frequency.
2-37
Chapter 2 Operation
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