Service manual

Glossary
MERGEFORMAT ConfiguGlossaryal
Descriptionations
DCB, DCFCB and DCFCTB Models
96
Glossary
Term
Description
AC
Electric Alternating Current occurs when charge carriers in a conductor or
semi-conductor periodically reverse their direction of movement. For sirens,
this is provided by landline power.
AR Timer
Activating control for Model 2 and STH10
AWG
American Wire Gauge is a United States standard set of non-ferrous wire
conductor sizes
BCD
Binary Coded Decimal, a format for representing decimal numbers in which
each digit is signified by four bits
CD
Carrier Detect – an indication that an RF carrier is present
CPU
Central Processing Unit
dBC
dB = Decibel, a standard for measuring sound pressure level. C = C
weighted filtering
DC
Directional Current is the unidirectional flow or movement of electric charge
carriers. For sirens, this is provided by battery power.
DMM
Digital Multi-Meter
DSA
Directional Speaker Array type of electronic siren
DTMF
Dual-Tone Multi-Frequency, an analog communications technology
EAS
Emergency Alert System
ECLIPSE8
Omni-directional DC siren with horns
ECLIPSENH
Omni-directional DC siren with no horns
Ethernet
A physical and data link layer technology for local area networks
FC
Federal Controller
FCDS
Federal Commander Digital System
FCT
Federal Controller Two-way
FEMA
Federal Emergency Management Association
FSK
Frequency Shift Keying, a digital communications technology
FSPWARE
Federal Signal Programmer Software
IAEM
International Association of Emergency Managers
IC
Integrated Circuit
IP
Internet Protocol
LED
A semiconductor device that emits visible light when an electric current
passes through it.
Low Band
Low frequency end of the VHF band, 30-50 MHz
MOD
Modulator electronic siren
Model 2
Omni-directional mechanical siren
MOSCAD
Motorola SCADA System
MSK
Minimal Shift Keying – a form of FSK
NEMA
National Emergency Managers Association
Ohm
Standard International (SI) measurement of electrical resistance
Omni
Antenna
An antenna with a non-directional pattern on the given plane of the antenna,
and a directional pattern in any orthogonal plane
PCB
Printed Circuit Board
PTT
Push to Talk
RF
Radio Frequency
RME
Eclipse roof mounting plate
ROW
Right Of Way
RTU
Remote Terminal Unit
SCADA
Supervisory Control and Data Acquisition