User's Manual Part 2

Bay Level Offset Calibration – continued
MAY 2004 1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU 6-79
PRELIMINARY
Transmit (TX) Path Calibration
Description
The assigned channel frequency and desired power level at the frame TX
ports for transmit calibration are derived from the BTS CDF file. Each
BBX at the site is assigned to a carrier. These are specified respectively
in the carrier field of the ParentCARRIER parameter in each BBXs CDF
file block. The channel frequency for the assigned sector is specified in
the ChannelList parameter of the CDF block for the CARRIER to
which the BBX is assigned.
For Low Power optimization of the SC480, the following adjustments
must be made to the CDF.
S In the Carrier section of the CDF, verify that the SifPilotPwr is set to
–200.
S In the BTS section of the CDF, verify that the CageConf is set to 5
(CCP2), and that BIOType is set to 3.
Be sure the bts–#.cdf and cbsc–#.cdf files loaded on the
LMF computer are current. The LMF will obtain carrier
and channel information from these files and insert it into
the appropriate CDMA Test Parameter screen. Failure to
have the most current files from the CBSC can result in
incorrect channel information being used to calibrate the
BTS and unfavorable affects on BTS performance. Carrier
and channel numbers should only be entered manually for
special test cases or as a last resort.
NOTE
The calibration process attempts to adjust the measured power to within
+
0.5 dB of the desired power. The calibration will pass if the error is less
than +
1.5 dB.
Table 6-32 lists the maximum and minimum power with and without the
cCLPA. The numbers presented may change at a later date.
Table 6-32: Maximum and Minimum Power
TX Configuration Max Power Min Power
Indoor / Low Power –6.0 dBm –16.0 dBm
Outdoor / Low Power –6.0 dBm –16.0 dBm
Indoor / High Power 43.0 dBm / 41.76 dBm* 33.0 dBm
Outdoor / High Power 43.0 dBm / 41.76 dBm* 33.0 dBm
* Non–domestic maximum high power is 41.76 due to TX GSM Elimination filter.
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