Motorola PM1200, User Manual

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34
Glossary
Push-To-Talk
(PTT) button The PTT button engages the transmitter and
puts the radio in transmit (send) operation
when pressed. Press this button to transmit;
release it to receive.
Repeater A conventional radio feature, in which you talk
through a receive/transmit facility (repeater)
that re-transmits received signals in order to
improve communications range and coverage.
RF Radio Frequency. A part of the general
frequency spectrum between the audio and
infrared light regions (about 10 kHz to
10,000,000 MHz).
Squelch The muting of audio circuits when received
signal levels fall below a pre-determined
threshold. With carrier squelch, you hear all
channel activity which exceeds the radio’s pre-
set Squelch Level.
Talkgroup An organization (or group) of radio users who
communicate with each other, using the same
communication path.
Tone Private-Line
(PL) Coded
Squelch A continuous sub-audible tone transmitted with
the carrier.
PM1200.book Page 34 Wednesday, October 10, 2007 2:44 PM