User's Manual Part 3

Appendix C: BBX2 Gain Set Point vs. BTS Output Considerations
Apr 2001
C-1
SC4812ET BTS Optimization/ATP — CDMA LMF
DRAFT
Usage & Background
Table C-1 outlines the relationship between the total of all code domain
channel element gain settings (digital root sum of the squares) and the
BBX2 Gain Set Point between 33.0 dBm and 44.0 dBm. The resultant
RF output (as measured at the top of the BTS in dBm) is shown in the
table. The table assumes that the BBX2 Bay Level Offset (BLO) values
have been calculated.
As an illustration, consider a BBX2 keyed up to produce a CDMA
carrier with only the Pilot channel (no MCCs forward link enabled).
Pilot gain is set to 262. In this case, the BBX2 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 C-1: BBX2 Gain Set Point vs. Actual BTS Output (in dBm)
dBm
Gain
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
397 – – – – 43.6 42.6 41.6 40.6 39.6 38.6 37.6 36.6
389 – – – – 43.4 42.4 41.4 40.4 39.4 38.4 37.4 36.4
. . . continued on next page
C