Kenwood TM-741A - Manual (Page 41)

4-6. REPEATER OPERATION
4-6-1. Transmitter Offset
All amateur radio repeaters use a separate receive and
transmit frequency. The receive frequency may be above
or below the transmit frequency. The configuration of
most repeaters fall into one of the categories listed
below:
145.1 145.5 146.0 146.4 146.6 147.0 147.4 147.6 148.0
144 MHz
band
220 MHz
band
TM-741A
440/430 MH j
band
TM-741E
430 MHz
band
-I- -f600 kHz -fl.6 MHz -b5MHz + 1 . 6 MHz
- —600 kHz -1.6 MHz -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
transceiver advances from one direction to the other, i.e.
“ + ” to “ —” ” to “------ ” with European versions or
1200 MHz band) to no offset (simplex).
• Automatic Offset (U.S.A., and Canada versions)
The TM-641A/741A has been programmed according to
the standard ARRL (Amateur Radio Relay League)
Band Plan with regard to transmitter offset direction.
See the accompanying chart for additional information
about this programming. You can, of course, override
this by using the SHIFT key if desired.
s
—
s + s
—
+ s
—
s
220.000 223.920 224.995
S: simplex
S: simplex
4-6-2. Reverse Function
Some repeaters use a “Reverse Pair”, i.e. the transmit /
receive frequencies are the reverse of other repeaters.
For example, repeater A uses 146.000 for a transmit
frequency (INPUT) and 146.600 for a receive frequency
(OUTPUT). Repeater B might use 146.600 for a
transmit frequency and 146.000 for a receive frequency.
It would be inconvenient to have to reprogram the
transceiver each time you wanted to use these repeaters.
The REV key allows you to easily reverse the transmit
and receive frequencies. To use the REV function press
the REV key. The REV indicator goes on on the display
to indicate that you are working a reverse pair.
To return to normal press the REV key again. The REV
indicator goes 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.
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