User Manual

BTS Equipment Identification – continued

1-36 1X SC4812T–MC BTS Optimization/ATP 5/21/04

DRAFT

For an SC4812T BTS frame which has been converted to

multicarrier capability, a fourth three–sector carrier, using

BBX–10 through BBX–12, is supported in R16.4 and later

software releases. In a converted multicarrier frame, PA

slot 4 in all PA quadrants should never be populated.

NOTE

PA Shelves

The lower shelves house the PA cages which include:

S PA modules, PA fans, and Parallel Linear amplifier Combiners (PLCs)

S Multi–Carrier Module (MCM) which includes the Enhanced Trunking

Modules (ETMs), and TX filters

Location Nomenclature

Figure 1-15 presents standardized nomenclature for locations within the

PA cages.

Figure 1-15: PA Cage Location Nomenclature (Original Equipment Manufacture

(OEM) SC4812T–MC 3–Sector Shown)

MCM

CLPA

CLPACLPA

4B 4A

CLPA

PA Slot 1

PA Slot 2

PA Slot 3

PA Slot 4

Quadrant A

Quadrant C

Quadrant B

Quadrant D

PAs and Carriers

With changes in the network software for R16.4.1, PA allocation to

carriers in the SC4812T–MC changes significantly. The quantity of PAs

required is no longer dependant on the number of carriers equipped in

the frame. Implementation of the change differs between six sector BTSs

and BTSs equipped for omni, two–sector, and three–sector operation.

Additional details for each BTS sector configuration are provided in the

following paragraphs and Figure 1-20, Figure 1-21, and Figure 1-22.

Omni, two–sector, and three–sector multicarrier BTS – Up to four

carriers can be supported on an omni, two–, or three–sector BTS with

one PA set. If additional power output is required, additional PA sets can

be added up to the maximum of four sets. PAs must be added as

complete sets; that is, three PA modules for a 3x3 system and four PA

modules for a 4x4 system. (Refer to Figure 1-20 and Figure 1-21)