User's Manual

Introduction

68P09258A31–A

Oct 2003

1X SCt 4812T BTS Optimization/ATP

H-2

Introduction

Purpose

This procedure is a guide to expanding your system with multiple

carriers while the system remains in service. This procedure also allows

you to perform on site maintenance (replace defective boards and

recalibrate) while the remainder of the site stays in service.

Motorola recommends that you perform this procedure during a

maintenance window.

This procedure cannot be performed on BTSs with 4–to–1 combiners.

The procedure can only be performed on one side of the BTS at one

time. That is, LPAs 1, 2 ,3, 7, 8, 9 (feed antennas 1, 2, 3) can be

calibrated while LPAs 6, 7, 8, 10, 11, 12 (feed antennas 4, 5, 6) remain

in service and vice versa.

Equipment Warm up

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.

CAUTION

If any piece of test equipment (i.e., test cable, RF adapter) has

been replaced, re-calibration must be performed. Failure to do so

could introduce measurement errors, causing incorrect

measurements and degradation to system performance.