Kenwood TM-733A Instruction Manual page 93

CONTINUOUS TONE CODED SQUELCH SYSTEM (CTCSS)
The CTCSS feature is available only when the TSU-8
CTCSS unit is installed {page 110}.
CTCSS functions by using a subaudible tone that is
superimposed by a transmitter on a transmitted signal
to control a receiver's squelch. When used in
combination with the noise squelch, CTCSS provides a
simple method to selectively choose which stations will
be heard. This transceiver offers a total of 38
standardized CTCSS frequencies plus 1750 Hz on
European versions.
Monitoring is less tiring when using CTCSS since you
hear only those stations on a particular frequency that
are transmitting the Tone that you have selected.
SELECTING CTCSS FREQUENCIES
Refer to the chart of frequencies available and the
procedure for selecting the desired frequency on
page 61. Direct entry using an MC-45DM microphone
is also possible. Refer to page 85.
USING CTCSS
1 Press [BAND SEL] to select your desired band.
2 Repeatedly press [TONE] until "CT" appears on the
Display. Each press of [TONE] changes the Display
as below:
No Indicator ——» TONE ——+ CTCSS
(T") ("eT")
sai
+ The CTCSS indicator does not appear if the
CTCSS unit is not installed.
+ On European versions, a Tone frequency other
than 1750 Hz must be selected.
Subaudible tone is not transmitted
and tone squelch is not functional.
Subaudible tone is transmitted and
tone squelch is functional.
No indicator
CTCSS
Note:
¢@ When using DTSS or Page with CTCSS, the squelch opens only
if the correct CTCSS tone is received and the received DTSS or
Page code matches the code stored in your transceiver.
@ IfCTCSS and Tone Alert are ON, there is no speaker output
except the alarm tone even if a signal is received with the correct
CTCSS frequency.
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