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19
Understanding Scanning
Repeater Operation
Repeater systems use two frequencies: one transmits
from the radio to a central repeater; the other transmits
from the repeater to other radios in the system. With a
repeater-based system, the repeater is located on top
of a tall building or on a radio tower that provides great
visibility to the area of operation. When a user
transmits (on an input frequency), the signal is picked
up by the repeater and retransmitted (on an output
frequency). The user’s radios always listen for activity
on the output frequency and transmit on the input
frequency. Since the repeater is located very high,
there is a very large line of sight.
Where To Get More Information
By itself, this manual really only provides part of what
you need to know to have fun scanning – how to
program and use the scanner.
Information On The Internet
The Internet is a great source for current frequencies
and information about scanning. Many web sites have
lists of frequencies for your area. You can use a
search engine to find and use them.
Make a list of the agencies you want to listen to, then
look up the frequencies and systems used by those
agencies.
• www.racescanner.eu - Race frequency
information, programming software and
accessories.