Kenwood TH-D75 User Manual - Page 23

Operating Through Fm Repeaters, Repeater Access

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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 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 access, refer to the information from your national Amateur Radio association. 1 Access Menu No. 141. 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. 2 Select [On] and exit the menu. 3 Press [A/B] to select the operating band. 4 Press [VFO] to select VFO mode. 5 Select your operating frequency. 6 Press [PTT] to start transmission. • You will be transmitting on an offset frequency value determined from your offset setting value and an offset direction depending on your selected frequency. Refer to the settings below for offset directions: TH-D75A: Under 145.100 MHz: No offset (Simplex operation) 145.100 ~ 145.499 MHz: - 600 kHz offset 145.500 ~ 145.599 MHz: No offset (Simplex operation) 146.000 ~ 146.399 MHz: + 600 kHz offset 146.400 ~ 146.599 MHz: No offset (Simplex operation) 146.600 ~ 146.999 MHz: - 600 kHz offset 147.000 ~ 147.399 MHz: + 600 kHz offset 147.400 ~ 147.599 MHz: No offset (Simplex operation) 147.600 ~ 147.999 MHz: - 600 kHz offset 148.000 MHz and higher: No offset (Simplex operation) Under 223.920 MHz: No offset (Simplex operation) 223.920 ~ 224.999 MHz: - 1.6 MHz 225.000 MHz and higher: No offset (Simplex operation) Under 442.000 MHz: No offset (Simplex operation) 442.000 ~ 444.999 MHz: + 5 MHz offset 445.000 ~ 446.999 MHz: No offset (Simplex operation) 447.000 ~ 449.999 MHz: - 5 MHz offset 450.000 MHz and higher: No offset (Simplex operation) TH-D75E: Under 145.000 MHz: No offset (Simplex operation) 145.600 ~ 145.799 MHz: - 600 KHz offset 145.800 MHz and higher: No offset (Simplex operation) 7-1

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7-1
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
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 access, refer to the information from your national
Amateur Radio association.
1
Access Menu No. 141.
2
Select [On] and exit the menu.
3
Press
[A/B]
to select the operating band.
4
Press
[VFO]
to select VFO mode.
5
Select your operating frequency.
6
Press
[PTT]
to start transmission.
•
You will be transmitting on an offset frequency value
determined from your offset setting value and an offset
direction depending on your selected frequency. Refer to
the settings below for offset directions:
TH-D75A:
Under 145.100 MHz:
No offset
(Simplex operation)
145.100 ~ 145.499 MHz:
– 600 kHz offset
145.500 ~ 145.599 MHz:
No offset
(Simplex operation)
146.000 ~ 146.399 MHz:
+ 600 kHz offset
146.400 ~ 146.599 MHz:
No offset
(Simplex operation)
146.600 ~ 146.999 MHz:
– 600 kHz offset
147.000 ~ 147.399 MHz:
+ 600 kHz offset
147.400 ~ 147.599 MHz:
No offset
(Simplex operation)
147.600 ~ 147.999 MHz:
– 600 kHz offset
148.000 MHz and higher:
No offset
(Simplex operation)
Under 223.920 MHz:
No offset
(Simplex operation)
223.920 ~ 224.999 MHz:
– 1.6 MHz
225.000 MHz and higher:
No offset
(Simplex operation)
Under 442.000 MHz:
No offset
(Simplex operation)
442.000 ~ 444.999 MHz:
+ 5 MHz offset
445.000 ~ 446.999 MHz:
No offset
(Simplex operation)
447.000 ~ 449.999 MHz:
– 5 MHz offset
450.000 MHz and higher:
No offset
(Simplex operation)
TH-D75E:
Under 145.000 MHz:
No offset
(Simplex operation)
145.600 ~ 145.799 MHz:
– 600 KHz offset
145.800 MHz and higher:
No offset
(Simplex operation)