User's Manual Part 2

Bay Level Offset Calibration – continued

6-82 1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU MAY 2004

PRELIMINARY

Table 6-34: Procedure for Initial Set-up for TX Calibration

n Step Action

1 Delete the existing calibration file (if any) from the BTS folder on LMF laptop from the location

C:\wlmf\cdma\bts–#, where # is the BTS number.

2 To edit the nominal TX BLO, from the Util menu, select Edit > TX Nominal Offset. In the TX

Cal Parameter window, make any necessary changes to ensure the TX BLO Nominal Offset (in

dB) is set to the following:

– For 800 MHz, TX Nominal Offset value is 40.0 (dB), and the Allowed error range, plus or

minus (in dB) is 1.5

3 Download the data, which includes BLO values, to all the BBXs. From the Device menu, select Down-

load > Data

TX Calibration

Before installing any test equipment directly to any BTS

TX OUT connector, first verify no CDMA channels are

keyed. Failure to do so can result in serious personal injury

and/or equipment damage.

WARNING

Always wear an approved anti–static wrist strap while

handling any circuit card or module. If this is not done,

there is a high probability that the card or module could be

damaged by ESD.

CAUTION

At new site installations, to facilitate the complete test of

the CCP2 Shelf empty BBX slots may be populated to

ensure that all BBX TX paths are tested.

This procedure can be bypassed on operational sites that

are due for periodic optimization.

Prior to testing, view the CDF (or NECF) file to verify the

correct BBX slots are equipped. Edit the file as required to

include BBX slots not currently equipped (per Systems

Engineering documentation).

NOTE

All Cal/Audit and TX

Calibration Procedure

The LMF All Cal/Audit and TX calibration procedures are essentially

identical, except for the step that selects the type of procedure desired

(Refer to Step 4 in Table 6-35).