User's Manual

which the scanner tracks any ID, you do not need to program Talk Group ID’s.
.
LTRR Reception
LTRR Tracking
LTRR (Logic Trunked Radio) systems are trunking systems used primarily by
business or
private communications service providers, such as taxicabs, delivery trucks,
and repair
services. These systems encode all trunking information as digital subaudible
data that
accompanies each transmission. Users on an LTR system are assigned to
specific
talkgroups, 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 talkgroup ID on the display. In the
ID Scan mode,
the scanner only stops on the transmission if the LTR data matches a talkgroup
ID that you
have stored in the bank’s talkgroup ID list and have not locked out.
LTR systems are frequently programmed so that each radio has a unique ID
code.
Motorola Reception
Motorola Tracking
There are really two types of Motorola trunking systems. These are usually
referred to as
Type I and Type II systems. Type I only occurs on some 800 MHz systems. All
VHF and
UHF trunking systems use Type II.
One important distinction between these two systems is the amount of data
transmitted by
each radio when its push-to-talk button (PTT) is pressed. Every radio in a
trunked system is
assigned a unique ID so the central site computer can identify it when it’s used.
Both Type I