Anritsu Site Master S330A, Руководство пользователя, Страница: 56 / 85

NOTES:
For best calibration results — compensation for all
measurement system uncertainties — ensure that the
Open/Short/Load is at the end of the test port or op-
tional 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.
Performing a DTF Measurement
Step 8.
Press the DIST soft key, from the Main Menu (page
2-8).
Step 9.
Press the D1 soft key from the ensuing soft key menu
(page 2-13).
Step 10. Enter the desired numerical value using the keypad or
the Up/Down Arrow key (Figure 2-1, page 2-0).
Press
ENTER
when data entry is complete.
Step 11.
Repeat the above two steps for D2.
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Chapter 2 Operation