26
Understanding Scanning
Users on an LTR system are assigned to specific talk
groups, which are identified by the radio as six digit
numbers.
These numbers are in the form AHHUUU, where:
A = Area code (0 or 1)
H = Home repeater (01 through 20)
U = User ID (000 through 254)
When the scanner receives a transmission on a channel
set to the LTR mode, it first decodes the LTR data included
with the transmission. In the ID search mode, the scanner
stops on the transmission and displays the talk group ID on
the display. In the ID scan mode, the scanner only stops
on the transmission if the LTR data matches a talk group
ID that you have stored in the talk group ID list and have
not locked out. LTR systems are frequently programmed
so that each radio has a unique user ID.
Where To Get More Information
By itself, this manual really only provides part of what you
need to know to have fun scanning – how to program and
use the scanner. The two included conventional and
trunking frequency guides will give you a good head start
on the other part of what you need to know – what fre-
quencies have interesting content.
Information On The Internet
The Internet is a great source for current frequencies and
information about scanning. Many web sites have lists of
frequencies for your area. You can use a search engine to
find and use them.
Make a list of the agencies you want to listen to, then look
up the frequencies and systems used by those agencies.
Here are a few useful sites:
• http://www.scannermaster.com * - frequency
resources and home of Police Call.
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