User Manual

CDMA Operating Frequency Programming Information – North American

Bands

– continued

PRELIMINARY 2

SC 4812ET BTS Optimization/ATP – CDMA LMF

July 1999

D-2

Calculating Center

Frequencies

Table D-1 shows selected CDMA candidate operating channels, listed in

both decimal and hexadecimal, and the corresponding transmit, and

receive frequencies. Center frequency for channels not shown in the table

may be calculated as follows:

Direction

Formula Example

TX 1930 + (0.05 * Channel#) Channel 262: 1930 + (0.05*262) = 1943.10

RX 1850 + (0.05 * Channel#) Channel 237: 1850 + (0.05*237) = 1861.85

– Actual frequencies used depend on customer CDMA system

frequency plan.

– Each CDMA channel requires a 1.77 MHz frequency segment. The

actual CDMA carrier is 1.23 MHz wide, with a 0.27 MHz guard

band on both sides of the carrier

– Minimum frequency separation required between any CDMA

carrier and the nearest NAMPS/AMPS carrier is 900 kHz

(center-to-center).