User's Manual

Table Of Contents
BTS Equipment Identification
68P09255A61-4
Aug 2002
1X SC 4812T BTS Optimization/ATP Software Release 2.16.1.x
FIELD TRIAL
1-22
BTS Frame Description
The BTS is the interface between the span lines to/from the Cellsite Base
Station Controller (CBSC) and the site antennas. This frame is described
in three sections:
The top interconnect plate where all connections are made.
The upper portion of the frame which houses circuit breakers, cooling
fans, and the C-CCP shelf.
The lower portion of the frame which houses the LPA fans, LPAs, and
TX filter/combiners.
The -48 V version of the BTS also has a section below the LPAs
containing a power conversion shelf that supplies power to the LPAs.
Use the illustrations that follow to visually identify the major
components, that make up the Motorola SC 4812T BTS frame.
Top Interconnect Plate (see Figure 1-6 or Figure 1-7)
All cabling to and from the BTS equipment frames is via the
interconnect panel on the top of each frame. Connections made here
include:
Span lines
RX antennas
TX antenna
Alarm connections
Power input
LAN connections
GPS input or Remote Global Positioning System (RGPS) on the Site
I/O Board
Remote Global Positioning System Distribution (RGD)
LORAN-C Low Frequency Receiver (LFR) input
Expansion frame connection
Ground connections
RJ-45 Pass-through Connectors
C-CCP Shelf (see Figure 1-10)
C-CCP backplane and cage
Power supply modules
CDMA clock distribution (CCD) boards
CSM and HSO/LFR boards
Alarm Monitoring and Reporting (AMR) boards
GLI cards (may be GLI2 or GLI3)
MPC/EMPC boards
- MPC - starter frame only
- EMPC - expansion frames
Switch card
MCC boards (may be MCC8E, MCC24, or MCC-1X)
BBX boards (may be BBX2 or BBX-1X)
CIO boards
1