PAGE 18
INSTRUCTION MANUAL
TX4400
8 . Now switch the radio
OFF
then
ON
again to return to
normal operation .
Note:
To disable the sending or receiving of CTCSS tones,
set either tone to 00 . If both transmit and receive tones are
set to 00, the CTCSS function is disabled and cannot be
selected
.
ENABLING THE CTCSS FUNCTION ON A
CHANNEL
1 . Select the required channel .
2 . Briefly press the
F
key followed by the
SILENT key
.
A high beep will be heard and the 'SILENT' icon will
appear .
You may activate CTCSS on as many channels as you wish
except the emergency channel 5 .
To de-activate CTCSS, repeat steps 1 & 2 above . A low beep
will be heard and 'SILENT' will disappear .
HOW TO DISABLE FEATURES
The TX4400 has a number of features that can be disabled
by the user to allow for much simpler operation . This is
done by disabling one or more of the keys on the front
panel . These include the
Function
,
Scan/Dim
,
OS/GS/
Page
,
Duplex/Alpha
and the
Quiet/Silent
keys .
To disable one of the keys:
1 . Turn the radio
OFF
.
2 . Press and hold the key you wish to disable while turning
the radio back
ON
.
A low beep will be heard and the selected key will no
longer function .
To re-enable the key, repeat the steps above . When the
radio is turned on again, a high beep will be heard and the
key will function normally again .
For example, to disable the SCAN function:
1 . Turn the radio
OFF
.
2 . Press and hold the
SCAN
key while turning the radio
back
ON
. A low beep will be heard and the SCAN
function will no longer be available .
Repeat the procedure to re-enable the SCAN function .
REPEATERS
A repeater system consists of a linked transmitter/receiver
combination installed in a prominent location . The repeater
is designed to receive signals on a designated channel and
re-transmit them on another channel .
Repeaters are usually located on hills, mountains or tall
buildings . The increased elevation greatly improves the
range of the repeater beyond that of a normal base or
mobile . This means that the repeaters are able to receive
and retransmit signals to radios that would otherwise be
out of range of each other .
Tone No .
Frequency Hz
Tone No .
Frequency Hz
Tone No .
Frequency Hz
Tone No .
Frequency
Hz
00
0
13
100 .0
26
156 .7
39
196 .6
01
67 .0
14
103 .5
27
159 .8
40
199 .5
02
69 .4
15
107 .2
28
162 .2
41
203 .5
03
71 .9
16
110 .9
29
165 .5
42
206 .5
04
74 .4
17
114 .8
30
167 .9
43
210 .7
05
77 .0
18
118 .8
31
171 .3
44
218 .1
06
79 .7
19
123 .0
32
173 .8
45
225 .7
07
82 .5
20
127 .3
33
177 .3
46
229 .1
08
85 .4
21
131 .8
34
179 .9
47
233 .6
09
88 .5
22
136 .5
35
183 .5
48
241 .8
10
91 .5
23
141 .3
36
186 .2
49
250 .3
11
94 .8
24
146 .2
37
189 .9
50
254 .1
12
97 .4
25
151 .4
38
192 .8
CTCSS TONE FREQUENCY CHART
