PA G E 1 6
I n s t r u c t I o n m A n uA l
t X 3 5 1 0 / t X 3 5 2 0 / t X 3 5 4 0
5. to see the actual sub tone instead of the tone label, briefly
press the
Channel knob
(or
LVL
PRI
key). For ctcss tones
the tone frequency will be displayed in Hz. For Dcs tones
the tone code will be displayed. Press the
Channel knob
(or
LVL
PRI
key) again to return to the ctcss/Dcs label (refer
to the ctcss and Dcs tone charts on pages 31–32.
CTCSS Label
CTCSS Sub tone Frequency
6. to switch ctcss/Dcs tones off, rotate the
Channel knob
fully to the left (or press repeatedly) until
CTCOF
is
displayed.
to exit the menu, briefly press the
PTT
or wait for the menu
to time-out.
NOTE:
the selected ctcss/Dcs tone will be used globally on
any channels that have ctcss enabled.
Enabling CTCSS/DCS on a channel (Silent mode)
Enabling ctcss/Dcs on a channel will prevent the squelch
from opening unless the incoming signal matches your
selected ctcss/Dcs tone. other users on the same channel
who are not using your ctcss/Dcs tone will still be received
by your radio (the icon will still appear on the display) –
but their voice will not be heard in the speaker. only when
someone transmits on the channel using your ctcss/Dcs
tone will the squelch open to allow the signal to be heard.
channels where ctcss/Dcs have been enabled are said to be
in ‘silent mode’.
NOTE:
silent mode can be enabled on any channel except
emergency channels 5 and 35.
To enable Silent mode on a channel:
1. select the required channel.
2. Press and hold the
SQL
key until a high beep is heard.
3. An icon (ctcss) or
icon (Dcs) will be displayed in
the lower right of the display to indicate silent mode is now
enabled on that channel.
NOTE:
You cannot enable silent mode unless a ctcss or Dcs
tone has been selected in the configuration menu. If ctcss/
Dcs has been set to oFF, silent mode is inhibited.
To disable Silent mode on a channel:
1. select the required channel. An icon (ctcss) or
icon
(Dcs) will be displayed indicating silent mode is enabled.
2. Press and hold the
SQL
key until a low beep is heard.
3. the (ctcss) or
(Dcs) icon will disappear to indicate
silent mode has been removed from that channel.
IMPORTANT:
When silent mode is enabled on a channel
you should always check the icon for signs of traffic on the
channel before transmitting to ensure you do not accidentally
transmit over the
top of another user. Alternatively, you
can
enable
Busy Lockout
in the
Configuration Menu
which
will automatically prevent your radio from transmitting if the
channel is already in use
Monitor function
When the current channel is in silent mode, the icon
may appear but no sound will be heard in the speaker. this
indicates that your radio is receiving a signal that does not
match your ctcss/Dcs tone. If you wish, you can briefly
monitor the channel as described below. this temporarily
disables silent mode, allowing the signal to be heard.
on the tX3510 and tX3520, press and hold the
Volume
knob
to monitor signals on the channel. When you release
the
Volume knob
, silent mode is restored and the radio will
become quiet again.
on the tX3540 briefly press the
PWR
key.
Note:
on the tX3540 you will only have a brief moment to
monitor the channel for signals as holding the
PWR
key for
more than a few seconds will switch the radio off.
