User's Manual

Test Set Calibration

3-98 1X SC 4812T Lite BTS Optimization/ATP FEB 2005

PRELIMINARY

Test Equipment 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.

If the Test Equipment Set being used to optimize or test the

BTS has been calibrated and maintained as a set, this

procedure does not need to be performed.

NOTE

This procedure must be performed prior to beginning the Optimization.

Verify that 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.

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 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.

NOTE

Automatic Calibration

Procedure

Procedures included in this section use the LMF Automated Calibration

Procedure 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.