User's Manual Part 2

Bay Level Offset Calibration – continued

Apr 2001

3-61

SC4812ET BTS Optimization/ATP — CDMA LMF

DRAFT

BLO Calibration Data File

During the calibration process, the LMF creates a calibration (BLO) data

file. After calibration has been completed, this offset data must be

downloaded to the BBX2s using the Download BLO function. An

explanation of the file is shown below.

Due to the size of the file, Motorola recommends that you

print out a hard copy of a bts.cal file and refer to it for the

following descriptions.

NOTE

The CAL file is subdivided into sections organized on a per slot basis (a

slot Block).

Slot 1 contains the calibration data for the 12 BBX2 slots. Slot 20

contains the calibration data for the redundant BBX2 (see Table 3-31).

Each BBX2 slot header block contains:

 A creation Date and Time – broken down into separate parameters of

createMonth, createDay, createYear, createHour, and createMin.

 The number of calibration entries – fixed at 720 entries corresponding

to 360 calibration points of the CAL file including the slot header and

actual calibration data.

 The calibration data for a BBX2 is organized as a large flat array. The

array is organized by branch, BBX2 slot, and calibration point.

– The first breakdown of the array indicates which branch the

contained calibration points are for. The array covers transmit, main

receive and diversity receive offsets as follows:

Table 3-30: BLO BTS.cal file Array Branch Assignments

Range Assignment

C[1]–C[240] Transmit

C[241]–C[480] Receive

C[481]–C[720] Diversity Receive