Adelaide Hills Amateur Radio Society short form manual for Jingtong JT-208/JT-308
Sub Audible Tones : CTCSS
The units can be setup for CTCSS operation individually or both on TX and RX. Some repeaters
use CTCSS tones to help prevent interference from adjacent services from holding the transmitter
on, or you may have a favourite channel that you use with someone else and you do not want to
hear other traffic on that particular channel. The tones may also be stored into individual channels.
There are 38 standard tones available as shown in the table at the end of this guide and they can be
set as follows :
Setting the CTCSS frequency and activating :
•
Press [SET] [9] the LCD display shows
cr-01
•
Use the [
↑
] and [
↓
] keys to select the required tone from the chart, for example if a
sub-tone of 141.3Hz is required, then key up to ‘22’, the display will show
cr-22
,
then push the [EXIT] key.
•
The tone may assigned to the TX function by [SET] [0] to turn it on or off, or to the
RX function by [SET] [8] to turn it on or off (toggle).
•
The tone will be sent when ever the PTT is pushed for the duration of the transmission,
similarly, the mute will only be broken when receiving a signal with correct CTCSS
tone.
It is recommended that the CTCSS tones be only put on stored channels, otherwise it will affect
the operation of DF mode operation.
Table of CTCSS frequencies (Select in grey – Tone in Hz clear)
1
2
3
4
5
6
7
8
87 71.9 74.4 77 79.7 82.5 85.4 88.5
9
10
11
12
13
14
15
16
91.5 94.8 97.4 100 103.5 107.2 110.9 114.8
17
18
19
20
21
22
23
24
118.8 123 127.3 131.8 136.5 141.3 146.2 151.4
25
26
27
28
29
30
31
32
156.7 162.2 167.9 173.8 179.9 186.2 192.8 203.5
33
34
35
36
37
38
210.7 218.1 225.7 233.6 241.8 250.3
Locking the Keypad :
The keypad may be locked to prevent accidental operation of the keys by [SET] [*]
Jingtong Transceiver Key Functions
Function Keys Function Keys
Lock keypad on/off
[SET] [*]
Start scan mode
[A]
or
[SET][5]
Direct Frequency Mode
[SET] [1]
Store frequency to memory
[B]
select channel
[C]
Memory Mode (Channels)
[SET] [2]
Store TX frequency to memory
[B]
select channel
[D]
Memory Mode (Frequencies)
[SET] [3]
Set step size
[SET] [4]
Repeater shift on/off
[SET] [6]
Unknown ?
turns ‘R’ off in LCD
[SET] [#]
Set repeater shift
[SET] [7]
enter shift
CTCSS transmit on/off
[SET] [0]
CTCSS mute on/off
[SET] [8]
Set CTCSS Frequency
[SET] [9]
select code
Clear all memories
Press
[SET]
while turning
on the transceiver
This table courtesy of G4ILO
Adelaide Hills Amateur Radio Society – mailing address P.O. Box 401, Blackwood, South Australia
5051, AUSTRALIA or via e-mail to [email protected]
by Barry Williams VK5ZBQ
17/7/06
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