User's Guide

Glossary
English
75
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 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.
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.
Term Definition
Tactical/
Non-Revert
The user talks on the channel that was
selected before the radio entered the
emergency state.
Talkaround
Bypass a repeater and talk directly to
another unit for easy local unit-to-unit
communications.
Talkgroup
An organization or group of radio users
who communicate with each other using
the same communication path.
Trunking
The automatic sharing of communications
paths between a large number of users
(see Conventional).
Trunking
Priority Monitor
Scan List
A scan list that includes talkgroups that are
all from the same trunking system.
USK Unique Shadow Key.
Zone A grouping of channels.
Term Definition
APX_3000_M1.book Page 75 Wednesday, December 5, 2012 11:04 AM