t X 3 5 0 0
I n s t r u c t I o n m A n uA l
PA G E 1 1
3. 50 or 38 will be displayed indicating the currently selected
tone set.
4. rotate the
Channel knob
one click left or right to change
the selection.
5. switch the radio oFF then on again to store your selection
and return to normal operation.
NOTE:
When switching upwards from the 38 tone set to the
50 tone set, the radio will retain the currently selected ctcss
tone frequency but will update the associated tone set number
to reflect its new position in the 50 tone set table.
e.g. ctcss tone #36 (233.6 hz) in the 38 tone set table
changes to tone #47 when the 50 tone set is selected.
When switching downwards from 50 to 38 tones, if there is
no equivalent ctcss tone frequency in the 38 tone set table,
the ctcss tone will be set to oFF and you will need to reselect
a new tone.
DCS (Digitally Coded Squelch)
dcs is a squelch quieting system similar to ctcss that uses
low frequency digital signals instead of a continuous low
frequency tone. As with ctcss, it also allows several user
groups to share the same channels without disturbing each
other. there are 104 dcs codes available. see dcs tone chart
at the back of this manual.
Choosing CTCSS or DCS
choosing which tone system and frequency to use will largely
depend on the other radios you talk to. If you talk to others
outside your group who already use ctcss or dcs tones, you
will need to select the tone system and frequency that matches
theirs. the tX3500 includes most of the commonly used
tone sets.
If the users you talk to don’t currently use ctcss or dcs,
then you can make your own choice. there is no difference in
performance or function between the different tone sets.
NOTE:
the tone you select will be used for all channels that
have ‘silent’ enabled.
To select a CTCSS or DCS tone
1. switch the radio off.
2. Press and hold the
SQL
key while switching the radio on
again.
3. the currently selected tone number will be displayed along
with a flashing icon in the lower right corner. A flashing
icon indicates a ctcss tone is displayed while a flashing
icon indicates a dcs tone is displayed.
4. rotate the
Channel knob
left or right to select the
required ctcss or dcs tone. rotating towards the right
will advance through the available ctcss tones. continue
rotating past the last ctcss tone to access dcs tones.
to switch the ctcss/dcs tones off, rotate the knob all the
way to the left until ‘oF’ is displayed.
5. once the required setting has been selected, switch the
radio oFF then on again to save the setting and restore
normal operation.
Enabling CTCSS/DCS on a channel (Silent mode)
When ‘silent’ mode is enabled on a channel, the ctcss/dcs
system will prevent the squelch on your radio from opening
unless the incoming signal matches your selected ctcss/dcs
tone. If other users are using the same channel but are not
using your selected ctcss/dcs tone, the busy icon will
appear on the display indicating the signal is being received,
however no sound will be heard in the speaker. only when
someone transmits on the channel using your selected
ctcss/dcs tone will the squelch open to allow you to hear
the signal.
silent mode can be enabled on any channel you choose
(except emergency channel 5/35).
Since there are 104 DCS tones and only two
characters available to display them, DCS tones
100 to 104 are labelled A0 to A4 on the display.
rotate left rotate right
oF
ctcss tones
1-38 or 1-50 ( )
dcs tones
1-104 (
)
