User's Manual

54!
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Chapter!7.!-!Repeaters!
A!radio!repeater!is!an!automated!transceiver!in!a!fixed!location.!Usually!mounted!high!up!on!hilltops!
or!on!tall!buildings,!but!sometimes!they!operate!within!buildings!for!internal!use.!A!repeater!takes!
one!signal!and!relays!it,!usually!after!amplifying!it!by!orders!of!magnitude.!!
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Whether!you're!a!commercial!(business!or!government)!user!or!an!amateur!radio!operator,!chances!
are!you'll!be!dealing!with!a!repeater!system!sooner!or!later.!To!find!out!what!settings!to!use!to!use!
your!local!repeater,!ask!your!employer!or!someone!at!your!local!amateur!radio!organization!for!
details.!
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A! common! type!of!repeater! is!the! duplex! repeater.! In! a! duplex!repeater!system,! the!repeater!
transmits!and!receives!simultaneously,!but!on!different!frequencies.!To!utilize!this!type!of!
repeater,! your! radio!has!to!be!capable!of!transmitting! and! receiving! on!different!frequencies!on!
the!same!memory!channel.!How!you!use!this!kind!of!repeater!is!by!setting!the!receive!frequency!of!
your!radio!to!the!output!frequency!of!the!repeater,!and!the!transmit!frequency!of!your!radio!to!the!
input!frequency!of!the!repeater.!Often!times,!the!transmit! frequency! to! use! isn't! explicitly!stated,!
but!rather!an!offset!relative! your!receive!frequency!is!specified.!This!is!conveniently!by!specifying!
offset!rather!than!transmit!frequency.!(Example!145.000MHz!Receive!with!.600MHz!transmit!is!a!
transmit!Channel!of!145.600MHz)!
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