A talkgroup is a virtual channel in a trunked radio
system — a numbered label identifying a group of users such as “Police Dispatch.”1
Members hear each other no matter which physical voice channel
the system assigns to a given call.
A talkgroup is a virtual channel: its calls hop across physical frequencies, but you follow the group.
How it works
Because the frequency changes call to call, the talkgroup provides a stable identity.
Operators lock, prioritise, or mute talkgroups, and the system handles the
frequency-hopping underneath.
Relevance to SDR
In GopherTrunk you follow talkgroups, not frequencies; each is shown with the
transmitting radio ID.
Sources
Talkgroup — Wikipedia, on the talkgroup as a virtual channel in trunked systems. ↩
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