User's Manual

Test Set Calibration68P09255A69-3
Aug 2002
1X SC4812ET Lite BTS Optimization/ATP Software Release 2.16.1.x
PRELIMINARY
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Test Set Calibration
Background
Proper test equipment calibration helps to ensure accurate BTS
optimization and acceptance testing by assuring that the test equipment
and associated cables do not introduce measurement errors.
NOTE
If the test equipment set (see the Terms and Abbreviations
section of Chapter 1) being used to optimize or test the BTS has
been calibrated and maintained as a set, this procedure does not
need to be performed.
This procedure must be performed before the optimization. Verify all test
equipment (including all associated cables and adapters actually used to
interconnect test equipment items and the BTS) has been calibrated and
maintained as a set.
CAUTION
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.
NOTE
Calibration of the communications system analyzer (or
equivalent test equipment) must be performed at the site before
calibrating the overall test equipment set. Calibrate the test
equipment after it has been allowed to warm-up and stabilize for
a a minimum of 60 minutes.
Calibration Procedures Included
Automatic
Procedures included in this section use the LMF automated calibration
routine to determine path losses of the supported communications
analyzer, power meter, associated test cables, adapters, 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 LMF computer.
Manual
Agilent E4406A Transmitter Tester - The E4406A does not support
the power level zeroing calibration performed by the LMF. If this
instrument is to be used for Bay Level Offset calibration and calibration
is attempted with the LMF Calibrate Test Equipment function, the
LMF will return a status window failure message stating that zeroing
power is not supported by the E4406A. Refer to the Equipment
Calibration section of Appendix F for instructions on using the
instrument’s self-alignment (calibration) function prior to performing
Bay Level Offset calibration.
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