User Manual

Test Equipment Selection, Calibration, and General Operation

Requirememnts

5/21/04 1X SC4812T–MC BTS Optimization/ATP 1-13

DRAFT

Policy

General Requirements – To ensure consistent, reliable, and repeatable

optimization test results, test equipment and software meeting the

following technical criteria should be used to optimize the BTS

equipment.

Test equipment substitution – Test equipment can, of course, be

substituted with other test equipment models but those models must

meet the same technical specifications. All test equipment models

selected for use in BTS calibration and acceptance testing must be

supported by the LMF..

Measurement variances and test equipment substitution – It is the

responsibility of the customer to account for any measurement variances

and/or additional losses/inaccuracies that can be introduced as a result

of test equipment model substitutions. Before beginning optimization or

troubleshooting, make sure that the test equipment needed is on–hand

and operating properly.

Test Equipment Calibration

Optimum system performance and capacity depend on regular equipment

service and calibration prior to BTS optimization. Follow the original

equipment manufacturer (OEM) recommended maintenance and

calibration schedules closely.

Test Cable Calibration

On–site cable calibration – Test cables can make critical differences in

optimization accuracy. It is recommended that cable calibration be run at

every BTS with the complete test equipment set. This method

compensates for test cable insertion loss within the test equipment set

itself. No other allowance for test cable insertion loss needs to be made

during the performance of BTS calibration or acceptance tests.

In–shop cable characterization – Another method to account for cable

loss is by entering it into the LMF during the optimization procedure.

This method requires accurate test cable characterization using shop test

equipment. Characterized cables should be tagged with the

characterization information, and the measured losses entered into the

LMF before field optimization.

Equipment Warm–up

After arriving at the a site, the test equipment should be plugged in and

turned on to allow warm up and stabilization to occur for as long as

possible. The following pieces of test equipment must be warmed–up for

a minimum of 60 minutes prior to using for BTS optimization

procedures.

S Communications Test Set

S Power Meter