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17
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 nds 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 dierent
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 nds 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.
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