User Manual

Bay Level Offset Calibration – continued
PRELIMINARY 2
SC 4812ET BTS Optimization/ATP – CDMA LMF
July 1999
3-64
– The second breakdown of the array is per sector. Three sectors are
allowed.
Table 3-34: BTS.cal file Array (per sector)
Sector TX RX RX Diversity
1 (Omni) C[1]–C[20] C[241]–C[260] C[481]–C[500]
2 C[21]–C[40] C[261]–C[280] C[501]–C[520]
3 C[41]–C[60] C[281]–C[300] C[521]–C[540]
4 C[61]–[80] C[301]–C[320] C[541]–C[560]
5 C[81]–[100] C[321]–C[340] C[561]–C[580]
6 C[101]–[120] C[341]–C[360] C[581]–C[600]
 Refer to the hard copy of the file. As you can see, 10 calibration
points per sector are supported for each branch. Two entries are
required for each calibration point.
 The first value (all odd entries) refer to the CDMA channel
(frequency) the BLO is measured at. The second value (all even
entries) is the power set level. The valid range for PwrLvlAdj is from
2500 to 27500 (2500 corresponds to –125 dBm and 27500
corresponds to +125 dBm).
 The 20 calibration entries for each sector/branch combination must be
stored in order of increasing frequency. If less than 10 points
(frequencies) are calibrated, the largest frequency that is calibrated is
repeated to fill out the 10 points.
Example:
C[1]=384, odd cal entry
= 1 ‘‘calibration point”
C[2]=19102, even cal entry
C[3]=777,
C[4]=19086,
.
.
C[19]=777,
C[20]=19086, (since only two cal points were calibrated this
would be repeated for the next 8 points)
 When the BBX2 is loaded with BLO data, the cal file data for the
BBX2 is downloaded to the device in the order it is stored in the CAL
file. TxCal data is sent first, C[1] – C[60]. Sector 1’s 10 calibration
points are sent (C[1] – C[20]), followed by sector 2’s 10 calibration
points (C[21] – C[40]), etc. The RxCal data is sent next, followed by
the RxDCal data.
 Temperature compensation data is also stored in the cal file for each
slot.
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