User's Manual

Terms and Abbreviations
08/01/2001
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1X SCt4812ET Lite BTS Optimization/ATP
PRELIMINARY
Standard and Non–standard
Terms and Abbreviations
Standard terms and abbreviations used in this manual are defined in
Cellular Glossary of Terms and Acronyms; 68P09213A95. Any
non–standard terms or abbreviations included in this manual are listed in
Table 1-1.
Table 1-1: Non–Standard Terms and Abbreviations
Term or Abbreviation Definition
ACLC AC Load Center. An SC4812ET Lite RF Base Transceiver Station (BTS)
subassembly which provides the frame interface for external AC power
connection and internal AC circuit control and protection.
CCD Clock Combining and Distribution. SC4812–series BTS CDMA Channel
Processor (CCP) shelf module which accepts timing signals from the active
source and distributes them to other CCP shelf modules.
CIO Combiner Input/Output.
DMAC Digital Metering, Alarm, Control. Part of the Meter Alarm Panel (MAP) which
provides control of and status information for the AC power rectifiers as well as
back–up battery monitoring and test capability. Term is used interchangeably with
MAP (see below).
DRDC Duplexer, Receive Filter, Dual Directional Coupler. Provides duplexing of BTS
transmit and receive signals to a single antenna and antenna signal sampling in
either the forward (transmit) or reflected (receive) direction for use by an RF
Diagnostic Subsystem (RFDS).
EMPC Expansion Multi–coupler Preselector Card. BTS expansion frame MPC module
which is used to receive, amplify, and distribute RX signals from the starter frame
MPC.
ETIB External Trunked Interface Board. Module providing status indicators and MMI
interface connections for LPAs in SC4812ET and SC4812ET Lite BTS frames.
HSO High Stability Oscillator. Module providing backup timing source for a BTS when
the timing signal from the GPS or RGPS module is unavailable.
HSOX HSO Expansion. Module used in a BTS expansion frame to interface with the
starter frame HSO or LFR and distribute the timing signals to the expansion frame
CSM modules.
LPAC Linear Power Amplifier Controller
MAP Meter Alarm Panel. SC4812ET Lite Field Replaceable Unit (FRU) which
contains the functions of both the Temperature Compensation Panel (TCP) and
the DMAC. Term is used interchangeably with DMAC.
MPC Multi–coupler Preselector Card. BTS CCP shelf module used to amplify and
distribute RX signals to BBX modules.
PDA Power Distribution Assembly. Assembly in an SC4812ET Lite BTS providing
internal DC power distribution and circuit protection.
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