check the volume level of the radio, since the radio “opens
the squelch” when the monitor button is pressed.
Network Access Code
Network Access Code (NAC) operates on digital channels
to reduce voice channel interference between adjacent
systems and sites.
Non-tactical/revert
The user will talk on a preprogrammed emergency channel.
The emergency alarm is sent out on this same channel.
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A one-way alert with audio and/or display messages.
Personality
A set of unique features specific to a radio.
Preprogrammed
A software feature that has been activated by a qualified
radio technician.
Private Line (PL)
A sub-audible tone that is transmitted such that only
receivers decoding the tone receives it.
Programmable
A radio control that can have a radio feature assigned to it.
Push-to-Talk
PTT-The switch or button usually located on the left side of
the radio which, when pressed, causes the radio to
transmit. When the PTT is released, the unit returns to
receive operation.
Radio Frequency
RF-The portion of the electromagnetic spectrum between
audio sound and infrared light (approximately 10 kHz to 10
GHz).
Repeater
Remote transmit/receive facility that re-transmits received
signals in order to improve communications range and
coverage (conventional operation).
Selective Call
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