Glossary-10 Glossary
tactical/non-revert The user will talk on the channel that was selected before the radio
entered the emergency state.
TalkAround Bypassing a repeater and talking directly to another unit for local unit-to-
unit communications.
talkgroup An organization or group of radio users who communicate with each
other using the same communications path.
talkgroup scan list A scan list that can include both talkgroups (trunked) and channels
(conventional).
thin small-outline
package
A type of dynamic random-access memory (DRAM) package that is
commonly used in memory applications.
time-out timer A timer that limits the length of a transmission.
tone A continuous, sub-audible tone transmitted with the carrier.
TOT See time-out timer.
transceiver Transmitter-receiver. A device that both transmits and receives analog
or digital signals. Also abbreviated as XCVR.
transmitter Electronic equipment that generates and amplifies an RF carrier signal,
modulates the signal, and then radiates it into space.
trunking The automatic sharing of communications paths between a large
number of users. Allows users to share a smaller number of frequencies
because a repeater or communications path is assigned to a talkgroup
for the duration of a conversation. See also conventional.
trunking priority
monitor scan list
A scan list that includes talkgroups that are all from the same trunking
system.
TSOP See thin small-outline package.
TX Transmit.
UART See also Universal Asynchronous Receiver Transmitter.
UHF Ultra-High Frequency.
USK Unique shadow key.
Universal
Asynchronous
Receiver Transmitter
A microchip with programming that controls a computer's interface to its
attached serial devices.
Universal Connector Interface point for all accessories to the radio.
Universal Serial Bus An external bus standard that supports data transfer rates of 12 Mbps.
USB See Universal Connector.
Term Definition
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