User's Manual Part 1

BTS Equipment Identification – continued

Apr 2001

1-23

SC4812ET BTS Optimization/ATP — CDMA LMF

DRAFT

Sector Configuration

There are a number of ways to configure the BTS frame. Table 1-5

outlines the basic requirements. When carrier capacity is greater than

two, a 2:1 or 4:1 cavity combiner must be used. For one or two carriers,

bandpass filters or cavity combiners may be used, depending on

sectorization and channel sequencing.

Table 1-5: BTS Sector Configuration

Number of

carriers

Number of

sectors

Channel spacing Filter requirements

1 3 or 6 N/A Bandpass Filter, Cavity Combiner (2:1 or 4:1)

2 6 Non–adjacent Cavity Combiner (2:1 Only)

2 6 Adjacent Dual Band Pass Filter

2 3 Non–adjacent Cavity Combiner (2:1 or 4:1)

2 3 Adjacent Bandpass Filter

3,4 3 Non–adjacent Cavity Combiner (2:1 or 4:1)

3,4 3 Adjacent Cavity Combiner (2:1 Only)

The matrix in Table 1-6 shows a correlation between the various sector

configurations and BBX cards.

In Table 1-6, BBXs may be BBX2s or BBX–1Xs.

NOTE