Programmable
Refers to a radio control that
can have a radio feature
assigned to it.
PTT
Push-To-Talk. The
PTT
button
engages the transmitter and
puts the radio in transmit (send)
operation when pressed.
Radio Frequency
(RF)
The part of the general
frequency spectrum between
the audio and infrared light
regions (about 10 kHz to
10,000,000 MHz).
Repeater
A conventional radio feature,
where you talk through a
receive/transmit facility that re-
transmits received signals, in
order to improve
communications range and
coverage.
Selective Call
A feature that allows you to call
a select individual, intended to
provide privacy and to eliminate
the annoyance of having to
listen to conversations of no
interest to you.
Selective Switch
Any digital P25 traffic having
the correct Network Access
Code and the correct talkgroup.
Squelch
Special electronic circuitry,
added to the receiver of a
radio, that reduces, or cuts off,
unwanted signals before they
are heard in the speaker.
SSI
Synchronous Serial Interface
Standby
An operating condition whereby
the radio’s speaker is muted
but still continues to receive
data.
Status Calls
Pre-defined text messages that
allow the user to send a
conditional message without
talking.
Tactical/ Non-
Revert
The user talks on the channel
that was selected before the
radio entered the emergency
state.
Glossary
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English
