Edacs Mode - Radio Shack PRO-92 Owner's Manual

20-522.fm Page 33 Friday, September 17, 1999 12:46 PM
For example, Police East Patrol might be assigned to
group 12, making the full Fleet, Subfleet ID be 000-12. To
properly map the raw Type I data to the correct fleet-sub-
fleet 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 systems 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-dig-
it formats for talk group ID's.
Note: Since the subaudible data is included with every
transmission, you can generally receive Motorola sys-
tems from further away than when using systems that
only decode the data channel (like the EDACS mode).
However, as the signal quality worsens, or if the signal is
subject to interference, the scanner might not be able to
reliably decode the talk group ID. In this case, you might
occasionally notice that the talk group ID changes during
a transmission.

EDACS Mode

This sets the scanner to decode the talk group ID's used
with an EDACS (GE/Ericsson) system. This is a trunking
system used primarily by business or private communica-
tions 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 PRO-92 to correctly switch to an active
frequency, you must program the frequencies in LCN or-
der, starting with Memory 01. EDACS talk group ID's are
entered as a 4-digit decimal number from 0000 to 4096.
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