Motorola DR 3000 service manual Glossary

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.
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.
MHz	Megahertz: One million cycles per second. Used especially as a radio-
	frequency unit.
Paging	One-way communication that alerts the receiver to retrieve a message.