User's Manual

BTS Equipment Identification68P09258A31–A
Oct 2003
1X SCt 4812T BTS Optimization/ATP
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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:
S The top interconnect plate where all connections are made.
S The upper portion of the frame which houses circuit breakers, cooling
fans, and the C–CCP shelf.
S The lower portion of the frame which houses the PA fans, PAs, and
TX filter/combiners.
S The –48 V version of the BTS also has a section below the PAs
containing a power conversion shelf that supplies power to the PAs.
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:
S Span lines
S RX antennas
S TX antenna
S Alarm connections
S Power input
S LAN connections
S GPS input or Remote Global Positioning System (RGPS) on the Site
I/O Board
S Remote Global Positioning System Distribution (RGD)
S LORAN–C Low Frequency Receiver (LFR) input
S Expansion frame connection
S Ground connections
S RJ–45 Pass–through Connectors
C–CCP Shelf (see Figure 1-10)
S C–CCP backplane and cage
S Power supply modules
S CDMA clock distribution (CCD) boards
S CSM and HSO/LFR boards
S Alarm Monitoring and Reporting (AMR) boards
S GLI cards (may be GLI2 or GLI3)
S MPC/EMPC boards
– MPC – starter frame only
– EMPC – expansion frames
S Switch card
S MCC boards (may be MCC8E, MCC24, or MCC–1X)
S BBX boards (may be BBX2 or BBX–1X)
S CIO boards
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