User's Manual

BBX Gain Set Point vs. BTS Output
FEB 2005 1X SC 4812T Lite BTS Optimization/ATP D-1
PRELIMINARY
Usage and Background
Table D-1 outlines the relationship between the total of all Code Domain
Channel Element Gain Settings (digital root sum of the squares) and the
BBX Gain Set Point between 33.0 dBm and 44.0 dBm. The resultant RF
Output (as measured in dBm at the BTS Antenna Connector) is shown in
the table. The table assumes that the BBX Bay Level Offset (BLO)
Values have been calculated.
As an illustration, consider a BBX keyed–up to produce a CDMA
Carrier with only the Pilot Channel (no MCC Cards Forward Link
enabled). Pilot Gain is set to 262.
In this case, the BBX Gain Set Point is shown to correlate exactly to the
actual RF Output anywhere in the 33 to 44 dBm Output Range. This is
the level used to calibrate the BTS.
Table D-1: BBX Gain Set Point vs. Actual BTS Output (in dBm)
dBm’
Gainb
44 43 42 41 40 39 38 37 36 35 34 33
541 – – – – – – – 43.3 42.3 41.3 40.3 39.3
533 – – – – – – – 43.2 42.2 41.2 40.2 39.2
525 – – – – – – – 43 42 41 40 39
517 – – – – – – – 42.9 41.9 40.9 39.9 38.9
509 – – – – – – – 42.8 41.8 40.8 39.8 38.8
501 – – – – – – – 42.6 41.6 40.6 39.6 38.6
493 – – – – – – 43.5 42.5 41.5 40.5 39.5 38.5
485 – – – – – – 43.4 42.4 41.4 40.4 39.4 38.4
477 – – – – – – 43.2 42.2 41.2 40.2 39.2 38.2
469 – – – – – – 43.1 42.1 41.1 40.1 39.1 38.1
461 – – – – – – 42.9 41.9 40.9 39.9 38.9 37.9
453 – – – – – – 42.8 41.8 40.8 39.8 38.8 37.8
445 – – – – – 43.6 42.6 41.6 40.6 39.6 38.6 37.6
437 – – – – – 43.4 42.4 41.4 40.4 39.4 38.4 37.4
429 – – – – – 43.3 42.3 41.3 40.3 39.3 38.3 37.3
421 – – – – – 43.1 42.1 41.1 40.1 39.1 38.1 37.1
413 – – – – – 43 42 41 40 39 38 37
405 – – – – – 42.8 41.8 40.8 39.8 38.8 37.8 36.8
table continued next page
D