Kenwood TM-431E User Manual
Page 29
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Mode.
When
this
option
is
installed
and
the
CTCSS
func
tion has been activated the radio will not open squelch un
til the proper PL tone is received.
In Europe a 1750 Hz tone is used in transmit. Press and hold
the
Microphone
1750
key
to
transmit
with
the
access
tone,
you need not press the PTT key.
Since this tone is required in Europe and the United King
dom a 1750 Hz tone encoder is included with models deli
vered to these countries.
Tone Frequency Selection
1.
Press the F key for longer
than 1 second. The F indi
cator
will
begin
to
flash.
Press
the
TONE/T.ALT
key
within
10
seconds
of
pressing
the
F
key.
The
current
tone
frequency
will
show in the display.
2.
Rotate
the
tuning
control
or
press
the
microphone
UP/DWN
switches
to
select the desired tone fre
quency.
3.
Press any front panel key
to return to the normal fre
quency display.
Tone Frequency
67.0 Hz
107.2 Hz
167.9 Hz
71.9 Hz
110.9 Hz
173.8 Hz
74.4 Hz
114.8 Hz
179.9 Hz
77.0 Hz
118.8 Hz
186.2 Hz
79.7 Hz
123.0 Hz
192.8 Hz
82.5 Hz
127.3 Hz
203.5 Hz
85.4 Hz
131.8 Hz
210.7 Hz
88.5 Hz
136.5 Hz
218.1 Hz
91.5 Hz
141.3 Hz
225.7 Hz
94.8 Hz
146.2 Hz
233.6 Hz
( 97.4 Hz)
151.4 Hz
241.8 Hz
100.0 Hz
156.7 Hz
250.3 Hz
103.5 Hz
162.2 Hz
Note: 97.4 Hz is available only
for encode.
Tone/CTCSS Operation
Press the TONE/T.ALT 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 ap
pears
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.
Note:------------------------------------------------------------------------------------------------------
The tone frequency of 97.4 Hz is available for tone encode
only. No Tone Squelch is possible with this frequency.
4-6-4. Autopatch Operations (U.S.A. versions only)
Some
repeaters
offer
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.
The
MC-44DM
microphone
provides
the
normal
keys
you
would
have
on
your
telephone
at
home,
as
well
as
4
additional
keys, the A, B, C, and D keys. These keys are used for con
trol
purposes
on
some
repeater
systems.
You
should
check
with the control operator of the repeater to see if they offer
autopatch
services.
A
chart
is
provided
that
lists
the
vari
ous tone frequencies that are generated by the Keypad.
To activate the keypad:
1. Press and hold the PTT key.
2. Press the keys just like you would dial you telephone at
home.
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