User's Manual

Test Set Calibration68P09255A61-4
Aug 2002
1X SC 4812T BTS Optimization/ATP Software Release 2.16.1.x
FIELD TRIAL
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Test Set Calibration
Test Set Calibration Background
Proper test equipment calibration ensures that the test equipment and
associated test cables do not introduce measurement errors, and that
measurements are correct.
NOTE
If the test set being used to interface with the BTS has been
calibrated and maintained as a set, this procedure does not need
to be performed. (Test Set includes LMF terminal,
communications test set, additional test equipment, associated
test cables, and adapters.)
This procedure must be performed prior to beginning 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.
CAUTION
If any piece of test equipment, test cable, or RF adapter, that
makes up the calibrated test equipment set, has been replaced,
re-calibration must be performed. Failure to do so can introduce
measurement errors, resulting in incorrect measurements and
degradation to system performance.
NOTE
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.
Purpose of Test Set Calibration
These procedures access the 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 set. After calibration, the gain/loss
offset values are stored in a test measurement offset file on the LMF.
Selecting Test Equipment
Use LMF Options from the Options menu list to select test equipment
automatically (using the autodetect feature) or manually.
A Serial Connection and a Network Connection tab are provided for
test equipment selection. The Serial Connection tab is used when the
test equipment items are connected directly to the LMF computer via a
GPIB box (normal setup). The Network Connection tab is used when
the test equipment is to be connected remotely via a network connection.
Prerequisites
Ensure the following prerequisites have been met before proceeding:
 Test equipment is correctly connected and turned on.
 CDMA LMF computer serial port and test equipment are connected to
the GPIB box.
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