User's Manual

Bay Level Offset Calibration – continued
3-114 1X SC 4812T Lite BTS Optimization/ATP FEB 2005
PRELIMINARY
– TX Filter or TX Filter Combiner
– TX Filter/Filter Combiner–to–DRF/TRF Cable
– DRF or TRF
BLO Calibration Data File
During the Calibration Process, the LMF creates a Calibration (CAL)
Data File where BLO Values are stored. After Calibration has been
completed, these Offset Values must be downloaded to the BBX Cards
using the LMF BLO Download Function. A detailed description of the
file organization and content is provided in the following paragraphs.
Due to the size of the file, Motorola recommends printing
out a copy of a
bts–#.cal file and referring to it for the
following descriptions.
NOTE
CAL File Organization
The CAL File is subdivided into three sections called “Slot Blocks”.
These are:
1. Slot[1] Block that contains the Calibration Data for the six Primary
BBX Slots.
2. Slot[20] Block that contains the Calibration Data for the Redundant
BBX. Refer to Table 3-38.
3. Slot[385] Block that contains the Calibration Data for the RFDS.
BBX Slot Block Parts
BBX Slot Blocks are further subdivided into the parts described in the
following paragraphs.
Slot Block Header – Each BBX Slot Block has a Header Section (Slot
Header) that contains the following items.:
S A Creation Date and Time – broken down into separate parameters of
“createMonth”, “createDay”, “createYear”, “createHour”, and
“createMin”.
S The number of Calibration Entries in the file – the
“numBayLevelPts” Parameter. The parameter is fixed at 720 entries
for SC4812 Series Frames. These 720 entries are combined to define
the 360 Calibration Points of the CAL File.
S The slot Block format parameter.
Slot Block Bay Level Calibration Data – Each BBX Slot Block has a
Bay Level Calibration Data Section (BayLevelCal) that is organized as a
large flat array. The array is organized by Branch, SCCP Cage BBX
Slot, and Calibration Entries.
There are several ways to look at the array contents. Two different views
are provided in the following to illustrate the significant features of
“BayLevelCal” section content and organization:
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