Glossary-1
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.
CMOS Complementary Metal Oxide Semiconductor.
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 communication 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
GNSS Global Navigation Satellite 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.
LDMOS Laterally Diffused Metal Oxide Semiconductor.
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.
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