Page 14
INSTRUCTION MANUAL
TX680
TX680
INSTRUCTION MANUAL
Page
15
NOTE:
To communicate with other UHF
radios using CTCSS, all radios you wish
to communicate with must be switched
to the same channel and have the same
CTCSS code selected. If you wish to
receive signals from UHF radios that are
not using CTCSS you will need to either
disable CTCSS on that channel or set the
CTCSS code to
‘oF’ as described below.
To Select a CTCSS Code
From the Standby mode:
1. Select the required channel using the
or
keys.
2. Press the
MODE
key ONCE to select
the CTCSS setting mode. ‘CTC’ will
flash on the display.
3. Press the or
keys to select the
required CTCSS code. (A list of available
codes is shown in the chart at the end
of this manual).
NOTE:
To turn CTCSS off on this
channel,set the CTCSS code to ‘oF’.
4. Press and hold the
MODE
key (or press
the
PTT
key momentarily) to confirm
and store your selection.
To Activate CTCSS on the Radio
1. Select a channel that has a CTCSS
code selected.
2. Press and hold the
SQL
key for about
2 seconds. The ‘CTC’ icon and CTCSS
code will appear on the display. CTCSS
is now enabled on ALL channels that
have CTCSS codes selected.
To Deactivate CTCSS on the Radio
1. Select a CTCSS enabled channel using
the or
keys. The ‘CTC’ icon and
CTCSS code will be displayed on
that channel.
2. Press and hold the
SQL
key for about
2 seconds. The ‘CTC’ icon and CTCSS
code will disappear from the display
indicating CTCSS is no longer activated.
NOTE:
CTC
SS is only enabled on those
channels with CTCSS codes selected.
All other channels will
continue to
operate normally.
2. trAnsmitter Power
The transmitter power can be set to High
(3 watts) or Low (1 watt). The power
setting applies to all channels
To Set the Transmit Power
From the Standby mode:
1. Press the
MODE
key TWICE to select
the power setting mode. ‘Po’ will be
displayed and HI or LO will be flashing
on the display.
2. Press the or
keys to select the
required power setting. Select HI for
high power or LO for low power.
3. Press and hold the
MODE
key (or press
the
PTT
key momentarily) to confirm
and store your selection.
The TX680 should now display the
selected channel number along with HI
or LO to indicate the transmit power you
have set.
3. Vox settings
The VOX feature lets you have hands
free conversations. When you speak, the
microphone automatically detects your
voice (or other nearby sound) causing
the radio to transmit without the need to
press the
PTT
switch.
To Set Radio for VOX Operation
From the Standby mode:
1. Press the
MODE
key THREE times to
select the VOX setting mode. ‘VOX’ will
flash on the display.
2. Press the or
keys to select the
sensitivity from 1 (minimum) to 7
(maximum). The minimum setting
requires a louder voice to activate the
VOX. The maximum setting will activate
the VOX with a much softer voice.
3. To disable the VOX completely, set the
VOX sensitivity to ‘oF’
4. Press and hold the
MODE
key (or
press the
PTT
key momentarily) to
confirm and store your selection. When
the ‘VOX’ is enabled, ‘VOX’ is visible on
the display.
4. dUAl wAtCH settings
The Dual Watch mode lets you to monitor
two channels at the same time. While in
dual watch mode, the unit will monitor
both the currently selected channel and a
second dual watch channel.
To Set the Dual Watch Mode
From the Standby mode:
1. Press the
MODE
key FOUR times to
select the Dual Watch setting mode.
The
icon will flash on the display.
2. Press the or
keys to select the
Dual Watch channel number (1 – 40).
To disable the Dual Watch Mode
altogether select ‘oF’.
3. Press and hold the
MODE
key (or
press the
PTT
key momentarily) to
confirm and store your Dual Watch
channel selection. will be displayed
at the top of the LCD and the display
will now alternate between the
currently selected channel and the dual
watch channel.
To EXIT the Dual Watch mode, turn the
radio off, or momentarily press the
SCAN
key. This is equivalent to setting the DW
mode to ‘oF’.
Dual Watch Operation
• If a signal is received on the Dual
Watch channel, the radio will pause on
that channel for as long as it remains
busy, then resume the Dual Watch 5
seconds after the last transmission
has ceased.
• If you wish to talk on the busy channel,
press the
PTT
switch while the radio is
locked onto that channel then talk in
the usual way.
• If you wish to talk on the selected
channel, press the
PTT
switch while no
signals are being received. The radio
will switch to the selected channel.
