Motorola Mode - Radio Shack PRO-2067 Owner's Manual

When the scanner receives a trans-
mission on a channel set to the LTR
mode, it first decodes the LTR data in-
cluded with the transmission. In the
open mode, the scanner stops on the
transmission and displays the talk
group ID on the bottom line of the dis-
play. In the closed mode, the scanner
only stops on the transmission if the
LTR data matches a talk group ID that
you have stored in the bank's talk
group ID list and have not locked out.
LTR systems are frequently pro-
grammed so that each radio has a
unique ID code.

Motorola Mode

You can set your scanner so it de-
codes the talk group IDs used with
Motorola trunking systems. This set-
ting is called the Motorola mode .
Motorola systems are trunking sys-
tems used primarily by business and
public safety groups to efficiently allo-
cate a small number of frequencies
(as few as 5) to many groups of users
(as many as several thousand). To do
this, each group of users in the system
is assigned to a specific talk group.
For example, the east side patrol offic-
ers might all be assigned to talk group
2160. One channel in the system is
continuously transmitting data that
identifies which talk groups are active
on which channel. In addition, this talk
group information is also transmitted
as subaudible data on each active
channel.
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When the scanner receives a trans-
mission on a channel set to the Motor-
ola mode, it first decodes the talk
group ID data included with the trans-
mission. In the open mode, the scan-
ner stops on the transmission and
displays the talk group ID on the bot-
tom line of the display. In the closed
mode, the scanner only stops on the
transmission if the talk group ID
matches a talk group ID that you have
stored in the bank's talk group ID list
and have not locked out.
Motorola trunking systems come in
three categories: Type I , Type II , and
Type I/II Hybrid . Each category dis-
plays and uses talk group IDs in slight-
ly different ways.
Motorola Type I IDs are in the form
FFF-SS , where:
FFF = Fleet ID
SS = Subfleet ID
Type I systems are usually organized
with different user groups assigned to
different fleets. For example, a valid
fleet/subfleet ID identifying all detec-
tives within a police department might
be 000-12 , where
police users and
tective division.
To properly map the raw Type I data
to the correct fleet-subfleet format,
you must program the correct fleet
map into the scanner. Fleet map infor-
mation is widely available on the Inter-
net for most Type I systems in use.
000 identifies all
identifies the De-
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