Repeater
Systems
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How They Work
A repeater is an electronic device that
repeats radio signals from a location other than
that of the original transmitter. A repeater
recieves a signal and simultaneously repeats it
on another frequency.
Repeaters can extend the range of hand-held or
mobile radios from 30 to 150 miles + !!!
Repeaters use FM or Frequency Modulation because
of its ability to keep the integrity and
clarity of a signal. FM is also used because it
is realitively inexpensive compared to other
advanced types of modulation. Most repeaters
operate in the VHF and UHF part of the radio
spectrum. Repeaters are used by almost every
agency in the world that utilizes radio
communication(s). Repeaters contain many useful
features such as: phone patches, links to other
repeaters, voice mailboxes, and countless other
devices that limit access or enhance it.
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How
to Use Them
To use a repeater the operator would simply press the
microphone button on the microphone of their radio and
speak... However some repeaters require a DTMF tone, (the
audible tones used by your telephone). Some radio
microphones contain a keypad with numbers and the * and #
plus other buttons for other sub-audible and audible
tones.
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Ham repeaters usually have a 600KHz or
0.60 MHz Offset
Output 146.610 MHz
Input 146.010 MHz
You would listen to the output.
When you press the button the radio
switches to the input frequency.
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