Motorola SL1M, Service Manual

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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
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.
FCC Federal Communications Commission.
Frequency Number of times a complete electromagnetic-wave cycle occurs in a
fixed unit of time (usually one second).
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.
MHz Megahertz: One million cycles per second. Used especially as a radio-
frequency unit.
PC Board Printed Circuit Board. Also referred to as a PCB.
Programming Cable A cable that allows the CPS to communicate directly with the radio
using USB.
Receiver Electronic device that amplifies RF signals. A receiver separates the
audio signal from the RF carrier, amplifies it, and converts it back to the
original sound waves.
RF Radio Frequency: The portion of the electromagnetic spectrum between
audio sound and infrared light (approximately 10 kHz to 10 GHz).
RX Receive.
Signal An electrically transmitted electromagnetic wave.
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