The Dual Tone Squelch System (Dtss); Dtss Code; Dts Code; Using The Dtss Function - Kenwood TH-78A Instruction Manual

The desired band will now operate in the Tone Squelch mode. That is, squelch will not open until the selected tone
is received as a portion of the incoming signal.
If you want to set the CTCSS function to another band, repeat steps 1 and 2.
Note
In duplex operation, if CTCSS is activated in the Sub and Main bands it is not active during transmission.

THE DUAL TONE SQUELCH SYSTEM (DTSS)

DTSS allows squelch activation in the receive mode when the transceiver receives a three-digit code matching the
DTSS code you have selected.
Once squelch is activated, it operates normally from then on. If no signal is received for more than two seconds,
squelch turns off until the transceiver receives a matching code.
1

DTSS Code

You can select DTSS codes from 000 to 999 in the VFO mode. Store them either in memory channel or in the call
channel.
Selecting DTSS Codes
1) Press the BAND key to select the desired band.
2) Press and hold the F key for longer than one second, then press the 2/DTSS key.
Note
Pressing a non-numeric key cancels code selection mode. Code selection cancels automatically if
you make no entries within 10 seconds.
2

Using the DTSS Function

1) Adjust the squelch to the threshold point.
2) Press the BAND key to select the desired band.
Press the F key, then press the 2/DTSS key. The DT indicator will appear on the display.
3)
4) Squelch opens when you receive the proper code.
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