User's Manual Part 2

Bay Level Offset Calibration – continued

DRAFT

SCt4812T CDMA BTS Optimization/ATP

Mar 2001

3-66

BLO Calibration Data File

During the calibration process, the LMF creates a bts–n.cal calibration

(BLO) offset data file in the bts–n folder. After calibration has been

completed, this offset data must be downloaded to the BBXs 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 BBX slots. Slot 20

contains the calibration data for the redundant BBX. Each BBX 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 BBX is organized as a large flat array. The

array is organized by branch, sector, 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 3-31: BLO BTS.cal File Array Assignments

Range Assignment

C[1]–C[240] Transmit

C[241]–C[480] Main Receive

C[481]–C[720] Diversity Receive

Slot 385 is the BLO for the RFDS.

NOTE

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