Kenwood TH-42A - Manual (Page 47)

DUAL TONE SQUELCH SYSTEM (DTSS)
DTSS is available only on transceivers equipped with a
DTMF keypad.
DTSS provides a more refined method than CTCSS to
selectively communicate with specific stations. A total of
1000 3-digit DTMF (Dual Tone Multi-Frequency) codes
are available to be used as addresses for stations with
which you wish to communicate. These codes can be
changed easily and regularly as required. Due to the
quantity of different codes, large networks can be set up
that use DTSS for selective calling and receiving. By
including group codes in the network plan, sub-groups
within the network can be contacted without disturbing
others monitoring the same frequency.
If your needs are simpler, DTSS also serves a useful
purpose when you only wish direct communication with a
few close friends on your favorite frequency. A good
example of this application is at hamventions when a
particular frequency can be virtually unusable due to
overcrowding, if your group switches ON DTSS, your
squelch only opens when a call with your private address
or the group address is received. If no signal is received
for more than 2 seconds after DTSS has opened the
squelch, the squelch then closes. Anytime you wish to
monitor all activity on the channel, you simply switch
OFF the DTSS function.
ACTIVATING DTSS
To switch ON the DTSS function, press [F], [2].
• "DT" appears when DTSS is ON.
IЛ ^ ^
• Each time this key combination is pressed, DTSS
toggles ON and OFF.
Note:
^ When [F], [2] is pressed with Page ON, Page is
automatically switched OFF, and DTSS is switched ON.
► Both DTSS status and a DTSS code can be stored in a
memory channel or the Caff channel. Further, when
recalling either a memory channel or the Call channel with
DTSS status ON while using the VFO with Page switched
ON, Page is given priority and the DTSS status switches
OFF.
► The microphone is inhibited while the DTSS code is
transmitted.
► It's advisable to turn OFF Battery Saver when you use
DTSS.
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