Adelaide Hills Amateur Radio Society short form manual for Jingtong JT-208/JT-308
Setting Repeater Offset : (DF mode)
•
The repeater offset function is accessed by pushing [SET] [7]. The frequency of offset
is then entered as follows :-
•
For 600 Khz (JT-208 VHF) from the keypad enter 0060 – the unit will beep and
display the offset as
0
0
.
60
0 -
To exit press [EXIT].
•
For 6 Mhz (JT-308 UHF) from the keypad enter 0600 – the unit will beep and display
the offset as
0
6
.
00
0 -
To exit press [EXIT].
Turning Repeater Offset on/off : (DF mode)
•
This function toggles the repeater offset on or off, as well as setting the direction of
the shift positive or negative. To activate push [SET] [6], you will see the LCD display
indicate a positive shift by a very small ‘
+
’ sign to the immediate upper left of the
frequency readout. To set to negative offset repeat the sequence [SET] [6] and you
will see the sign change to a ‘--‘ sign. To turn the repeater offset off, repeat the
sequence [SET] [6] and it will be observed that the symbol has disappeared.
•
With the offset turned on the unit will now transmit at a frequency ± the offset
entered, the frequency being displayed on the LCD display. This is function is very
useful in setting up the memory channels (see section on storing frequencies), but must
be turned off for simplex channels.
Setting Frequencies : (DF mode)
In this mode the frequency can be directly entered from the keypad or with a combination
of keypad and [+M / –M ] & the [up/down
↑↓
] keys.
•
To enter a frequency (for example 146.525Mhz), the frequency may be entered by
keying in 1,4,6,5,2,5 at which time the unit will beep indicating frequency has been
entered. the LCD will display
1
46
.
52
5
. The unit will now transmit and receive on that
frequency (provided the Offset is switched off).
•
The frequency may also be altered to another frequency by using the following keys –
[+M] will increment the Mhz display by 1 Mhz for each push of the key, similarly the
frequency may also be decremented by pushing [–M] key.
•
The Khz section can be altered by using the [UP
↑
] and [DN
↓
] keys, and will
increment or decrement by the Frequency Step value set previously. If the buttons are
held down for more than 3 seconds the display will increment or decrement at the step
rate until the button is released.
Storing Frequencies to Memory Channels : (DF mode)
•
The unit has 30 memory channels that may be used for storing commonly used
frequencies and repeater channels, complete with offset information or with odd
transmit and receive frequencies. The procedure is as follows :-
Storing Repeater Frequencies : (offset on)
•
Set unit to DF mode with [SET] [1], turn repeater offset on [SET] [6], [SET] [6] to set
negative offset mode. Enter the required RX frequency (example 147.000Mhz) by
entering 1,4,7,0,0,0 unit will beep, then push [B] key, this will bring up a flashing 2
digit channel number in the right hand side of the LCD. Select your required channel /
memory location with the [
↑
] and [
↓
] keys, then press [C] and the frequency and
offset will be stored.
•
Repeat this sequence until you have entered all required repeater frequencies then turn
off the repeater offset off by [SET] [6] (no ± displayed).
by Barry Williams VK5ZBQ
17/7/06
Page 2 of 4
