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20-522.fm Page 34 Friday, September 17, 1999 12:46 PM
When there is activity on an EDACS system, that infor-
mation 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 dis-
plays the talk group ID on the bottom line of the display.
In the Closed mode, the scanner only goes to transmis-
sions that have ID's that match a talk group ID that you
have stored in the bank's talk group ID list and have not
locked out.
Because EDACS scanning requires you to have clear re-
ception of the control channel at all times, EDACS sys-
tems 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 sys-
tem, try manually selecting the data channel. If you are
getting good reception, the scanner will indicate talk
group CTR-01. Try changing your location or using an
outdoor antenna to improve reception.
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