Operating instructions

Glossary
This glossary contains an alphabetical listing of terms and their definitions that are applicable to
portable and mobile subscriber radio products. All terms do not necessarily apply to all radios, and
some terms are merely generic in nature.
Term Definition
Analog Refers to a continuously variable signal or a circuit or device designed
to handle such signals.
Band Frequencies allowed for a specific purpose.
CPS Customer Programming Software: Software with a graphical user
interface containing the feature set of a radio.
Default A pre-defined set of parameters.
Digital Refers to data that is stored or transmitted as a sequence of discrete
symbols from a finite set; most commonly this means binary data
represented using electronic or electromagnetic signals.
DPL Digital Private-Line: A type of digital communications that utilizes
privacy call, as well as memory channel and busy channel lock out to
enhance communication efficiency.
FCC Federal Communications Commission.
Frequency Number of times a complete electromagnetic-wave cycle occurs in a
fixed unit of time (usually one second).
GPIO General-Purpose Input/Output: Pins whose function is programmable.
GPS Global Positioning System
IC Integrated Circuit: An assembly of interconnected components on a
small semiconductor chip, usually made of silicon. One chip can contain
millions of microscopic components and perform many functions.
IF Intermediate Frequency.
kHz kilohertz: One thousand cycles per second. Used especially as a radio-
frequency unit.
LCD Liquid-Crystal Display: An LCD uses two sheets of polarizing material
with a liquid-crystal solution between them. An electric current passed
through the liquid causes the crystals to align so that light cannot pass
through them.
LED Light Emitting Diode: An electronic device that lights up when electricity
is passed through it.
MDC Motorola Digital Communications.