Uniden BC246T 사용자 설명서

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each time a user transmits. So, while on a conventional 
system queries, replies, and follow-ups are all on a single 
frequency, they could each be on completely different 
frequencies on a trunked system. This semi-random 
frequency assignment made monitoring such a system 
impossible prior to Uniden’s invention of the 
Trunktracking scanner. 

Not only does your BC246T scan channels like a conven-
tional 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 are a new scanner enthusiast, you might 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 terminology 
will make trunk tracking much easier. If you are already 
an experienced scanner operator, you might want to go to 
“Programming Motorola Systems” on Page 52, “Program-
ming EDACS Systems” on Page 55, or “Programming 
LTR Systems” on Page 58 now.

Trunking systems divide a few frequencies among many 
different users, but the way that each system does this is 
slightly different. This section describes some of the
 technical data behind Motorola, EDACS, and LTR 
trunked radio systems.

While there are different types of Motorola trunking 
systems, they all use the same basic trunking method. 
The system consists of one control channel plus one or 
more voice channels (typically 10, 20, or 30 total 
channels). When a user presses Push To Talk (PTT) to 
transmit, their radio first sends their talk group information 
to the control channel. The computer then assigns that 
talk group to a specific voice channel and transmits that 
data over the control channel. All radios in that talk group 
switch over to the assigned voice channel and the user