User Manual

BTS Equipment Identification – continued
PRELIMINARY 2
SC 4812ET BTS Optimization/ATP – CDMA LMF
July 1999
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BTS Frame Identification
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 I/O interconnect plate where all connections are made is located at
the back of the BTS.
 The RF section of the frame which houses the circuit breakers, cooling
fans, the Combined CDMA Channel Processor (C–CCP) shelf, the
duplexors, filters, RFDS and CSU.
 The LPA compartment which houses the LPAs and blower assembly.
Use the illustrations that follow to visually identify the major
components, that make up the Motorola SC 4812ET BTS frame.
C–CCP Shelf (Figure 1-3)
 Power supply modules
 CDMA clock distribution (CCD) boards
 CSM and HSO/LFR boards
 Alarm Monitoring and Reporting (AMR) boards
 Group Line Interface II (GLI2) cards
 Multicoupler Preselector (MPC) boards (starter frame only)
 Expansion Multicoupler Preselector (EMPC) boards (expansion
frames)
 Switch card
 MCC24 boards
 MCC8E boards
 BBX2 boards
 CIO boards
PA Shelves
 Single Tone Linear Power Amplifier (STLPA, or more commonly
referred to as “LPA”) modules
 LPA blower assembly
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