Operating Through Fm Repeaters; Repeater Access - Kenwood TH-D74A User Manual

7 OPERATING THROUGH FM REPEATERS

Repeaters are often installed and maintained by radio clubs,
sometimes with the cooperation of local businesses involved
in the communications industry.
Compared to simplex communication, you can usually
transmit over much greater distances by using a repeater.
Repeaters are typically located on mountain tops or other
elevated locations. They generally operate at higher
ERP (Effective Radiated Power) than a typical station.
This combination of elevation and high ERP allows
communications over considerable distances.
TX: 144.725 MHz
TX tone: 88.5 Hz
RX: 145.325 MHz

REPEATER ACCESS

Most repeaters use a receive and transmit frequency pair
with a standard or non-standard offset (odd-split). In addition,
some repeaters must receive a tone from the transceiver in
order to gain access to the repeater. For details, consult your
local repeater reference.
Selecting an Offset Frequency
The offset frequency is the value which the transmit
frequency will be offset from the receive frequency. The
default offset frequency on the 144 MHz band is 600 kHz for
all type versions. The default on the 430/440 MHz band is 5
MHz.
1 Select your desired band A or B.
2 Access Menu No. 140.
• The selectable range is from 00.00 MHz to 29.95 MHz,
in steps of 50 kHz.
Note:
◆ After changing the offset frequency, the new offset frequency
will also be used by Automatic Repeater Offset.
Automatic Repeater Offset
This function automatically selects an offset direction and
activates the Tone function, according to the frequency that
you have selected. To obtain an up-to-date band plan for
repeater offset direction, contact your national Amateur Radio
association.
1 Access Menu No. 141.
TX: 144.725 MHz
TX tone: 88.5 Hz
RX: 145.325 MHz
2 Select [On].
3 Press [A/B] to select the A band.
4 Press [VFO] to select VFO mode.
5 Select your desired frequency.
6 Press [PTT] to start a call.
• You will be transmitting on an offset frequency value
7-1
determined from your offset setting value and an offset
direction depending on your selected frequency. Refer
to the settings below for offset directions:
TH-D74A:
Under 145.100 MHz:
145.100 ~ 145.499 MHz:
145.500 ~ 145.599 MHz:
146.000 ~ 146.399 MHz:
146.400 ~ 146.599 MHz:
146.600 ~ 146.999 MHz:
147.000 ~ 147.399 MHz:
147.400 ~ 147.599 MHz:
147.600 ~ 147.999 MHz:
148.000 MHz and higher:
Under 223.920 MHz:
223.920 ~ 224.999 MHz:
225.000 MHz and higher:
Under 442.000 MHz:
442.000 ~ 444.999 MHz:
445.000 ~ 446.999 MHz:
447.000 ~ 449.999 MHz:
450.000 MHz and higher:
TH-D74E:
Under 145.000 MHz:
145.600 ~ 145.799 MHz:
145.800 MHz and higher:
No offset
(Simplex operation)
– 600 kHz offset
No offset
(Simplex operation)
+ 600 kHz offset
No offset
(Simplex operation)
– 600 kHz offset
+ 600 kHz offset
No offset
(Simplex operation)
– 600 kHz offset
No offset
(Simplex operation)
No offset
(Simplex operation)
– 1.6 MHz
No offset
(Simplex operation)
No offset
(Simplex operation)
+ 5 MHz offset
No offset
(Simplex operation)
– 5 MHz offset
No offset
(Simplex operation)
No offset
(Simplex operation)
– 600 KHz offset
No offset
(Simplex operation)