Talkgroups, scan lists & priorities

Key takeaways A busy trunked system carries far more traffic than you want to hear, so you curate. A talkgroup is a logical channel — a group of radios, identified by an ID, not a frequency — and following a trunked system means following talkgroups. Scan lists are your chosen selection of them; lockout silences the ones you don’t want; and priority lets a key talkgroup interrupt whatever else is playing. Together these turn a firehose into exactly the calls you care about. Build on talkgroup basics and your frequency records.

Once a trunked system is programmed and locked, you face a new problem: there’s too much to hear. A metro system might carry hundreds of talkgroups — every fire, police, public-works, transit, and school channel in a county — and listening to all of them at once is just noise. This lesson is about curation: choosing what you hear, silencing what you don’t, and making sure the important calls always win.

Talkgroups, not frequencies

The unit of a trunked system is the talkgroup — a set of radios that talk together, identified by a numeric ID and usually a short alpha tag like “Fire Dispatch.” It is not a frequency; the system routes a talkgroup’s calls to whichever voice channel is free at that moment. So when you follow a trunked system, you follow talkgroups, and the receiver handles the frequency hopping underneath.

This is why your records for a trunked system are a list of talkgroup IDs and tags rather than frequencies, and why the talkgroup basics lesson matters here — the ID is the handle you organise everything around.

Scan lists — choosing what you follow

A scan list is your curated set of talkgroups to monitor. Instead of following every talkgroup on the system, you pick the ones that interest you — say, county fire and the two police districts near you — and group them into a list. The receiver then follows only those, ignoring the rest.

The real power is having several lists for different situations. A “daily” list of the channels you always want, an “incident” list you switch to when something’s happening, a “railfan” or “aviation” list for a specific interest. Switching lists reshapes what you hear in one action, which is far faster than editing talkgroups one at a time. Consistent alpha tags from your records make these lists quick to build and easy to read while scanning.

Lockout — silencing the noise

The mirror image of a scan list is lockout (sometimes “avoid”). When a talkgroup you don’t care about keeps interrupting — an automated data channel, a chatty maintenance group, a distant talkgroup you can barely hear — you lock it out and the receiver skips it from then on. Lockout is how you refine a list in the field: leave everything on at first, then lock out whatever annoys you until only the good traffic remains.

It’s worth distinguishing temporary from permanent lockout on radios that offer both — a temporary lockout clears when you power-cycle, handy for a talkgroup that’s busy today but usually interesting, while a permanent one sticks.

Priority — never missing the important call

Even within a good scan list, some talkgroups matter more than others. Priority solves this: a talkgroup you mark as priority can interrupt a lower-priority call already in progress. Set your main dispatch channel as priority, and while you’re listening to routine chatter the receiver keeps one ear on that priority talkgroup and breaks away the instant it keys up.

This is the feature that lets you monitor casually without missing the calls you actually tuned in for. On a busy system it’s the difference between hearing a dispatch as it happens and catching it three calls later — if at all. Use it sparingly: mark only the handful of talkgroups you’d genuinely drop everything for, or priority loses its meaning.

Building a listening strategy

Put the three together and you have a strategy rather than a raw feed. Start broad — follow most of the system to learn what’s active and when. Lock out the dead weight as it reveals itself. Group the keepers into purpose-built scan lists. Then flag the one or two must-hear talkgroups as priority. The result is a setup tuned to you: quiet when nothing’s happening, and loud with exactly the right call when it is.

Every choice you make here also feeds back into your records — which talkgroups earned a place, which got locked out, which deserve priority — so the strategy sharpens each time you use it. With the lists built, the next question is what actually happens on the air when one of those talkgroups keys up.

Quick check: you're listening to routine chatter but must not miss main dispatch. What do you set?

Recap

A talkgroup is a logical channel — a group of radios identified by an ID, not a frequency — and trunked following means following talkgroups.
Scan lists are your curated selection of talkgroups; keeping several for different situations lets you reshape what you hear in one action.
Lockout silences talkgroups you don’t want; use temporary lockout for the busy-today, interesting-usually ones.
Priority lets a key talkgroup interrupt a lower-priority call, so you never miss what you tuned in for — use it sparingly.
A good strategy is: follow broadly, lock out the dead weight, group the keepers, flag a few as priority — and feed the choices back into your records.

Next up: following a call across the system.

Frequently asked questions

What is a talkgroup?

A talkgroup is a logical channel on a trunked system — a group of radios that talk to each other, like “County Fire Dispatch” or “PD Patrol North.” It isn’t a frequency; it’s an ID the system uses to route a conversation to whichever voice channel is free. Following a trunked system means following talkgroups, not frequencies.

What's a scan list for?

A scan list is your curated selection of which talkgroups the receiver should follow. A busy system can carry hundreds of talkgroups, most of which won’t interest you, so a scan list lets you monitor just the ones you care about — and swap between different lists for different situations.

What does priority do?

Priority lets an important talkgroup interrupt a lower-priority call in progress. Set your key dispatch channel as priority and, even while you’re listening to routine chatter, the receiver breaks away the instant that priority talkgroup keys up — so you never miss the calls that matter most.