Repeater Operation; Transmitter Offset - Kenwood TH-27A Instruction Manual

4-6. REPEATER OPERATION
4-6-1. Transmitter Offsets
All amateur radio repeaters utilize a separate receiver
and transmit frequency. The receiver frequency may be
either above or below that of the transmit frequency. The
configuration of most repeaters will fall into one of the
categories listed below:
TH-27A1E TH-47A
TH-47E
+
+ 600 kHz
+ 5 MHz + 1.6 MHz
-
- 600 kHz - 5 MHz - 1.6 MHz
- -
- 7.6 MHz
• Offset Direction
To select the desired transmitter offset direction press
the SHIFT key. Each time you press the key the trans-
ceiver will advance from one direction to the other. i.e.
"+"
to "-" (" - " to " - - " with European versions) to
no offset (simplex).
• Automatic Offset Selection (U.S.A., Canada and Ocea·
nia version)
The TH·27 A has been programmed according to the
standard ARRL (Amateur Radio Relay League) Band Plan
with regard to transmitter offset direction. Please see the
accompanying chart for addition information on this
28
programming. You can, of course, override this by using
the SHIFT key if desired.
145.1145.5146.0146.4146.6147.0147.4147.6148.0
I
s
I - I
s
I
+
I
s
I - I
+
I
s
I - I
s
I
S :
simplex
4-6-2. Reverse Function
Some repeate rs utilize a "Reverse Pair", i.e. the trans·
mit/receive frequencies are exactly the reverse of an·
other repeater. For example repeater A uses 146.000
for a transmit frequency (INPUT) and 146.600 for a
receiver frequency (OUTPUT). Repeater B might use
14 6.600 for a transmit frequency and 146.000 for a
receiver frequency. It would be inconvenient to have to
reprog ram the transceiver each time you wanted to use
these repeaters.
The SHIFT/REV key allows you to easily reverse the
transmit and receiver frequencies. To use the REV
function press the F key, then the SHIFT/REV key. The
R indicator will turn on in the display to remind you that
you are working a reverse pair.
To return to normal press the F key, then SHIFT/REV key
again. The R indicator will turn off .
This function is also useful to check the input frequency
of the repeater so that you can determine if you are
within range for simplex communications.