Yaesu FT-60R - Manual (Page 17)

R. G. Sparber KG7MQL February 22, 2015 Page 17 of 52
Repeater Operation
Many of the features of the FT-60 involve communicating via repeaters. Before
we get into the settings related to repeater operation, let's review the basics.
All of the repeaters I use have a specified frequency and offset.
Say the frequency is 440.000 MHz with a positive offset of 5.000 MHz. Before I
press the Push To Talk key, the display shows 440.000 MHz. While I press the
PTT key, the frequency rises to 445.000 MHz, a change of +5.000 MHz. This is
the positive offset in action. I receive on a given frequency and transmit on a
frequency 5 MHz higher. Why do that?
Consider what is happening at the repeater.
While I transmit from my FT-60, I am on 445.000 MHz (which is 440.000 +
5.000 MHz). The 440.000 MHz repeater is set up to receive at 445.000 MHz .
The output of the repeater's receiver is connected to its transmitter. Whatever
comes in on the receiver immediately goes out via the transmitter but at 440.000
MHz.
By having the repeater receive at one frequency and simultaneously transmit on a
different frequency, it can receive and transmit at the same time without having
its receiver hearing what it is transmitting. If the repeater transmitted at the same
frequency as it received, it would just spend its days listening to itself and
ignoring you.
repeater
you
transmit
Frequency
receive
Frequency
me