Motorola MT 1500 manual Glossary, Ack, Astro

Glossary

This is a list of specialized terms used in this manual.

ACK	Acknowledgment of communication.
Active Channel	A channel that has traffic on it.
Analog Signal	An RF signal that has a continuous nature
	rather than a pulsed or discrete nature.
ASTRO 25 Trunking	Motorola standard for wireless digital trunked
	communications.
ASTRO	Motorola standard for wireless analog or
Conventional	digital conventional communications.
Call Alert	A page received by your radio, along with an
	audible tone.
Carrier Squelch	Feature that responds to the presence of an
	RF carrier by opening or unmuting (turning
	on) a receiver's audio circuit. A squelch circuit
	silences the radio when no signal is being
	received so that the user does not have to
	listen to noise.
Central Controller	A software controlled, computer-driven device
	that receives and generates data for the
	trunked radios assigned to it. It monitors and
	directs the operations of the trunked
	repeaters.
Channel	A group of characteristics such as transmit/
	receive frequency pairs, radio parameters,
	and encryption encoding.
Control Channel	In a trunking system, one of the channels that
	is used to provide a continuous, two-way/data
	communications path between the central
	controller and all radios on the system.
Conventional	Typically refers to radio-to-radio
	communications, sometimes through a
	repeater. (See Trunking.)

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