User's Manual

BBX Gain Set Point vs. BTS Output

68P09255A69-3

Aug 2002

1X SC4812ET Lite BTS Optimization/ATP Software Release 2.16.1.x

PRELIMINARY

C-2

BBX Gain Set Point vs. BTS Output

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

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 MCCs 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 C-1: BBX 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

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