User's Manual

Maintenance Handbook
Baltimore Radio Repeater System
Handbook No. 60-166501HBKM Page 23 of 26
6 APPENDIXES
6.1 Glossary of Terms used in this document
Repeater or
Cell Enhancer
A Radio Frequency amplifier which can simultaneously amplify and re-
broadcast Mobile Station and Base Transceiver Station signals.
Band Selective
Repeater
A
Cell Enhancer designed for operation on a range of channels within a
specified frequency band.
Channel Selective
Repeater
A
Cell Enhancer, 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
BBU Battery Backup Unit
BTS Base Transceiver Station
CEMS Coverage Enhancement Management System
C/NR Carrier-to-Noise Ratio
DAB Digital Audio Broadcasting
DC Direct Current
Downlink (D/L) RF signals RX from the BTS to the Master Site
FO Fibre Optic
GND Ground
ID Identification Number
LED Light Emitting Diode
LCX Coaxial Leaky Feeder
LNA Low Noise Amplifier
LPA Low Power Amplifier
MOU Master Optical Unit
M/S Master Site
MS Mobile Station
MTBF Mean Time Between Failures
N/A Not Applicable
N/C No Connection
OFR On Frequency Repeater
OIP3 Output Third Order Intercept Point = RF
out
+(C/I)/2
PA Power Amplifier
RF Radio Frequency
RSA Receiver/Splitter Amplifier
RX Receiver
S/N Serial Number
TTL Transistor-Transistor Logic, a common type of digital circuit.
TX Transmitter
Uplink (U/L) RF signals transmitted from the MS to the BTS
VSWR Voltage Standing Wave Ratio
WDM Wave division multiplex