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24
The Basics
To properly map the raw Type I data to the correct
fl eet-subfl eet format, you must program the correct
fl eet map into the scanner. Fleet map information
is widely available on the Internet for most Type I
systems in use.
Type II system talk groups are identifi ed by a 5-digit
number. Valid talk group IDs are divisible by 16. If you
try to enter an invalid talk group ID, the scanner rounds
the ID down to the next valid ID.
Type I/II hybrid systems use both fl eet-subfl eet and
5-digit formats for talk group IDs.
If the scanner decodes control channel data while
receiving transmissions from a Motorola trunking
system, CNTRL appears on the bottom line of the
display.
EDACS mode
You can set your scanner so it decodes the talk group
IDs used with EDACS (GE/Ericsson) trunking systems.
This setting is called the EDACS mode.
EDACS systems are trunking systems used
primarily by business or private communications
service providers, as well as by some public safety
organizations. EDACS systems transmit active talk
group information only on a dedicated control channel.
EDACS frequencies are organized in a specifi c order.
Each frequency is assigned a Logical Channel Number
(LCN). For the scanner to correctly switch to an active
frequency, you must program the frequencies in LCN
order, starting with Memory 01. EDACS talk group IDs
are entered as a 4-digit decimal number from 0001 to
2047 or AFS (Agency Fleet Subfl eet) number from 00-
001 to 15-157.
Note
Note