Motorola PM1200 User Manual page 46

Glossary
Push-To-Talk
(PTT) button
Repeater
RF
Squelch
Talkgroup
Tone Private-Line
(PL) Coded
Squelch
34
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.
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.
Radio Frequency. A part of the general
frequency spectrum between the audio and
infrared light regions (about 10 kHz to
10,000,000 MHz).
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.
An organization (or group) of radio users who
communicate with each other, using the same
communication path.
A continuous sub-audible tone transmitted with
the carrier.