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20-428 Owner's Manual
• For example, a valid fleet-subfleet ID identifying all detectives within a police department might
be 000-12, where 000 identifies all police users and 12 identifies the Detective division.
• Trunking the scanner to an active control channel while in Motorola mode will display the
Motorola System. ID and the approximate control channel message decode success rate. This
information can help you identify the Motorola Trunking system that you are monitoring and the
receive quality of the control channel signal.
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 information is widely available on the Internet for
most Type I systems in use.
Type II system talk groups are identified 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 fleet-subfleet and 5-digit formats for talk group IDs.
Note: 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 specific 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 Subfleet) number from 00-001 to 15-157.
When there is activity on an EDACS system, that information is sent out on the control channel.
The scanner decodes the ID for the active talk group. In the open mode, the scanner then goes to the
transmission and displays the talk group ID on the bottom line of the display. In the closed mode,
the scanner only goes to transmissions with IDs that match talk group IDs you have stored in the
bank's talk group ID list which are not locked out.
Because EDACS scanning requires clear reception of the control channel at all times, EDACS
systems tend to have a smaller usable area. An external antenna can greatly improve EDACS
scanning in a fringe area. If you are having trouble scanning an EDACS system, try manually
selecting the data channel. If you are getting good reception, the scanner will indicate talk group
CTL-01. Try changing your location or using an outdoor antenna to improve reception.
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