User's Manual Part 2

Test Set Calibration
PRELIMINARY
08/01/2001
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1X SCt4812ET Lite BTS Optimization/ATP
Background
Proper test equipment set–up ensures that all measurements are correct
and the test equipment and associated test cables do not introduce
measurement errors.
If the test equipment set (see Chapter 1, Terms and
Abbreviations) being used to interface with the BTS has
been calibrated and maintained as a set, this procedure does
not need to be performed.
NOTE
This procedure must be performed before the optimization. Verify all test
equipment (including all associated test cables and adapters actually used
to interface all test equipment and the BTS) has been calibrated and
maintained as a set.
If any piece of test equipment, test cable, or RF adapter,
that makes up the calibrated test equipment set has been
replaced, the set must be re-calibrated. Failure to do so can
introduce measurement errors, resulting in incorrect
measurements and degradation to system performance.
Motorola recommends repeating cable calibration before
testing at each BTS site.
CAUTION
Calibration of the communications test set (or equivalent
test equipment) must be performed at the site before
calibrating the overall test set. Calibrate the test equipment
after it has been allowed to warm–up and stabilize for a
minimum of 60 minutes.
IMPORTANT
*
Purpose
These procedures access the CDMA LMF automated calibration routine
used to determine the path losses of the supported communications
analyzer, power meter, associated test cables, and (if used) antenna
switch that make up the overall calibrated test equipment set. After
calibration, the gain/loss offset values are stored in a test measurement
offset file on the CDMA LMF.
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