6-3. tone and ctcss operation, 6-4. autopatch operations (u.s.a. versions only) – Kenwood TH-26A User Manual
Page 33
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4-6-3. Tone and CTCSS operation
Some repeaters require the use of a control signal to
activate
the
repeater.
Several
different
methods
are
currently in use.
In
the
United
States
sub-audible
tones
are
sometimes
used.
38
different
Sub-audible
frequencies
are
possible.
With the use of the optional CTCSS unit {TSU-7) you
w \ \
be able to operate in a Tone Operated Squelch Mode.
When this option is installed and the CTCSS function has
been activated the radio will not open squelch until the
proper PL tone is received.
In Europe and United Kingdom a 1750 Hz tone is used in
transmit. Press and hold the 1750 / LAMP switch to
transmit with the access tone, you need not press the
PTT switch.
Since this tone is required in Europe and the United
Kingdom
a
1750
Hz
tone
encoder
is
included
with
models delivered to these countries.
•
• Tone Frequency Selection
1. Press the F key. The F indicator will begin to flash.
Press the TONE / CTCSS key within 10 seconds of
pressing the F key. The current tone frequency wili
show in the display.
2.
Rotate the Tuning control to select the desired tone
frequency.
3.
When the desired tone frequency is selected, the
previous mode is resumed 10 seconds after selection
or when the TONE/CTCSS key is pressed.
Tone Frequency(Hz)
67.0
82.5
97.4
114.8
136.5
162.2
192.8
233.6
71.9
85.4
100.0
118.8
141.3
167.9
203.5
241.8
74.4
88.5
103.5
123.0
146.2
173.8
210.7
250.3
77.0
91.5
107.2
127.3
151.4
179.9
218.1
79.7
94.8
110.9
131.8
156.7
186.2
225.7
• Tone/CTCSS Operation
Press the TONE/CTCSS key and select the desired Tone
mode. When the T indicator appears in the display the
transmitter will transmit
the desired tone.
When the
CTCSS
indicator
appears
in
the
display
the
transceiver
will transmit
the desired
tone and will also
operate in
the Tone Squelch mode, i.e. squelch will not open until
the same tone is received as a portion of the incoming
receive signal. When no indicator is on the radio will
not make use of either tone feature.
4-6-4. Autopatch Operations (U.S.A. versions
only)
Some
repeaters
offset
a
service
known
as
autopatch.
This
feature
allows
you
to
dial
a
telephone
number
from your
transceiver
and carry out a
telephone
conversion,
much
like
a
care
telephone,
or
cellular
telephone.
This
function
requires
the use of a DTMF
(Dual Tone
Multi Frequency)
pad. In addition to the
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