Handbook
Axell Wireless Limited
Technical Literature
WMATA CRCS Redundant Antenna System
General Overview
Document Number 60-228701HBK Issue No. 3 Date 28/05/2010 Page 110 of 114
Appendix A
A.1. Glossary of Terms used in this document
Repeater or
Cell Enhancer
A Radio Frequency (RF) amplifier which can simultaneously amplify and re-broadcast
Mobile Station (MS) and Base Transceiver Station (BTS) signals.
Band Selective
Repeater
A Repeater designed for operation on a range of channels within a specified
frequency band.
Channel Selective
Repeater
A Repeater, designed for operation on specified channel(s) within a specified
frequency band. Channel frequencies may be factory set or on-site programmable.
AC Alternating Current
AGC Automatic Gain Control
BDA Bi-directional Amplifier
BTS Base Transceiver Station (Base Station)
B/W Bandwidth
C/NR Carrier-to-Noise Ratio
CRCS Comprehensive Radio Communications System
CRAS CRCS Redundant Antenna System
DAS Distributed Antenna System
DC Direct Current
Downlink (D/L) Signals transmitted from the BTS to the Mobiles
DSP Digital Signal Processing
F/O Fiber Optic
GND Ground
ID Identification (Number)
I/P Input
LCX Leaky Coaxial Cable (Leaky Feeder).
LED Light Emitting Diode
LNA Low Noise Amplifier
LPA Low Power Amplifier
Mobile(s) Hand-portable or other “Mobile” RF Transceiver equipment
MOU Master Optical Unit
MTBF Mean Time Between Failures
N/A Not Applicable
N/C (of Relays) Normally Closed
N/O (of Relays) Normally Open
OFR On Frequency Repeater
OIP3 Output Third Order Intercept Point
O/P Output
P1dB 1dB Compression Point
PA Power Amplifier
RF Radio Frequency
RHNC Relative Humidity, Non Condensing
RSA Receiver/Splitter Amplifier
RX Receiver (Received)
SDR Software-Defined Radio
S/N Serial Number
TX Transmitter (Transmitted)
Uplink (U/L) Signals transmitted from the Mobiles to the BTS
VSWR Voltage Standing Wave Ratio
Date Format Date Format used in this document is dd/mm/yyyy