Uniden BC 245XLT User Manual

Page 6

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In a trunked radio system, which contains up to 28 different

frequencies, radio users are divided into groups, often

called talk groups, and these talk groups are assigned

specific IDs. When someone in a talk group uses their

radio, a brief burst of data is broadcast before each

transmission. The trunking system computer uses this data

to temporarily assign each radio in a talk group to an

available frequency. If the group using a frequency stops

broadcasting or pauses between replies for a few seconds,

they are removed from the frequency so another talk group

can use it.

Sharing of the available public service frequencies, or

trunking, allows cities, counties, or other agencies to

accommodate hundreds of users with relatively few

frequencies. Following a conversation on a trunked system

using a scanner is difficult, if not impossible, because when

there’s a short break during the conversation you’re

monitoring, it’s possible that the talk group will be assigned

to a completely different frequency in the trunked system.

This type of scanning is difficult and frustrating.

TrunkTracker™ changes this! Not only does your new

BC 245XLT

scan channels like a conventional scanner, it

actually follows the users of a trunked radio system. Once

you know a talk group’s ID, you won’t miss any of the

action.

If you’re a new scanner enthusiast, you may want to read

the first part of this manual and use your scanner in

conventional mode before you begin trunk tracking.

Understanding scanning fundamentals and its terminology

will make trunk tracking much easier. But if you’re already

an experienced scanner operator, you may want to go to

Trunk Tracking on page 36 now.

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C:\Manuals\BC245 VA\BC245 VA rev.vp

Fri Nov 12 10:31:24 1999

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