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Table Of Contents

BTS Equipment Identification – continued

FEB 2005 1X SC 4812T Lite BTS Optimization/ATP 1-23

PRELIMINARY

ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ

FRONT

SITE I/O

LAN

CONNECTIONS

GPS IN

HSO

POWER INPUT/

DC FILTER

ETHERNET ROUTER (IF USED;

OTHERWISE, FILLER PLATE)

REAR

SPAN I/O

ti-CDMA-WP-00326-v01-ildoc-ftw

ALARM

CONNECTORS

POWER INPUT/

AC FILTER

SPAN I/O

VTRIM

FILTER CABLE

BULKHEAD

FILLER PLATES (3)

TX1 – CARRIER 3

TX2 – CARRIER 3

TX3 – CARRIER 3

TX1 – CARRIER 4

TX2 – CARRIER 4

TX3 – CARRIER 4

To Combiners

(to combine

with Carrier 2)

Ports are not used

on 3 Carrier

Configuration

RF EXPANSION PORT

FROM STARTER

FRAME

Figure 1-7: I/O Interconnect Panel (Expansion Frame – 3 and 4 Carrier)

DC Power Distribution Assembly (PDA)

The BTS Frame requires +27V, provided by direct input (+27V Version),

–48V to +27V Power Converters (–48V Version), or AC Rectifiers and

External Battery Back–up (AC Version). The +27V Power is then routed

to the Circuit Breaker Panel. Refer to Figure 1-2.

The Breaker Panel distributes DC Power and System DC Bus Protection

from the Loads with Distribution Circuit Breakers. The 6

post–Distribution Circuit Breakers permit removal of individual Loads.

Filter Compartment

The Filter Compartment (Figure 1-2) houses the Transmit/Receive Filters

(TRF/DRF).

Span I/O Board

The Span I/O Board (Figure 1-3) provides the Span Line Interface to the

SCCP Backplane.