Kenwood TH-77A Instruction Manual page 35
144/440mhz fm dual bander
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Also See for TH-77A:
- Service manual (92 pages) ,
- Instruction manual (56 pages) ,
- Instruction manual (28 pages)
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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.
You will be able to operate in a Tone Operated Squelch
Mode. 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 TONE
key 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.
The
CTCSS
unit
(TSU-7)
is not
included
with
models
except U.S.A and Canadian version.
@ Tone Frequency Selection
1. Press the F key. The F indicator will light. Press the
TONE
/ T.SEL key within 10 seconds of pressing the F
key.
The
current
tone
frequency
will
show
in the
display.
. Rotate
the Tuning
control
to select the desired
tone
frequency.
nm
3. When
the
desired
tone
frequency
is selected,
the
previous
mode
is resumed
10 seconds
after selection
or when the TONE/T.SEL 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 | 218.4
79.7 | 94.8 | 110.9 | 131.8 | 156.7 | 186.2 | 225.7
@ Tone/CTCSS Operation
Tone :
Press the TONE /T.SEL
key. The T indicator appears
on
the display and the transmitter will transmit the desired
tone.
CTCSS :
Press the F key, then the 3/M.CT key. The CT indicator of
the main band appears on the display. Press the F key,
then the 2/S.CT key. The CT indicator of the sub band
appears
on the display. The
transceiver
will 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.
35
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