Uniden SR30C English Owner Manual - Page 17
Scanning Basics
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SCANNING BASICS This section provides a background on how scanning works. You don't really need to know all of this to use your scanner, but some background knowledge will help you get the most from your SR30C. WHAT IS SCANNING? Unlike standard AM or FM radio stations, most two-way communications do not transmit continuously. Your SR30C scans programmed channels until it finds an active frequency, then stops on that frequency and remains on that channel as long as the transmission continues. When the transmission ends, the scanning cycle resumes until it receives another transmission on a programmed channel. WHAT IS SEARCHING? The SR30C searches for active frequencies. This is different from scanning because you are searching for frequencies that have not been programmed into the scanner. When you select frequency bands to search, the scanner searches for any active frequency within the lower and upper limits you specify for that band. When the scanner finds an active frequency, it stops on that frequency as long as the transmission lasts. If you think the frequency is interesting, you can program it into one of the bands. If not, you can continue to search. 17