A life-saving feature that senses the radio
user may be in trouble by monitoring the
whether the radio is in a vertical or
horizontal position or whether the radio is
When this feature is triggered, the radio
alerts the user with audio and visual alerts.
It can also trigger Emergency Alarm if
Check channel activity by pressing the
Monitor button. If the channel is clear, you
hear static. If the channel is in use, you
hear conversation. It also serves as a way
to check the volume level of the radio,
since the radio “opens the squelch” when
the monitor button is pressed.
A scan list that can include both talkgroups
(trunked) and channels (conventional).
Network Access Code (NAC) operates on
digital channels to reduce voice channel
interference between adjacent systems
The user talks on a preprogrammed
emergency channel. The emergency alarm
is sent out on this same channel.
OTAR Over-the-air rekeying.
Page A one-way alert, with audio and/or display
Personality A set of unique features specific to a radio.
Preprogrammed Refers to a software feature that has been
activated by a qualified radio technician.
A sub-audible tone that is transmitted such
that only receivers decoding the tone
Programmable Refers to a radio control that can have a
radio feature assigned to it.
Push-To-Talk – the PTT button engages
the transmitter and puts the radio in
transmit (send) operation when pressed.
The part of the general frequency spectrum
between the audio and infrared light
regions (about 10 kHz to 10,000,000 MHz).