GME TX680 - Manual (Page 11)

TX680 INSTRUCTION MANUAL Page 11
seconds. The call alarm can only be sent
once per minute.
seleCting CHAnnels
In the ‘Standby’ mode, press the key to
step up one channel or the key to step
down one channel.
Press and hold the or keys to
quickly scroll through the channels.
sQl Key
The SQL key is a dual function key that
controls both the Squelch and CTCSS
Squelch
To open the squelch, briefly press the
SQL key. This will allow you to check
the current channel for activity before
transmitting, particularly if you have
CTCSS enabled. When the squelch is
open, the LED indicator on the upper
edge of the radio will light Green, the
icon will appear on the display and
you will hear static or hiss if the channel
is clear. Do not transmit if you hear any
conversations. Briefly press the SQL key
again to close the squelch.
CTCSS
Press and hold the SQL key to activate
or deactivate CTCSS. When activated,
the ‘CTC’ icon will appear on the display,
along with the selected CTCSS code.
NOTE: To activate or deactivate CTCSS,
the current channel must have a CTCSS
code selected via the MODE key (See
MODE key settings for more details).
dUPlex/monitor Key
The Duplex/Monitor key is a dual
function key that controls both the Duplex
and Monitor functions.
DUP Key
Press this button to select Duplex mode
on channels 1 – 8 and 41 – 48. Duplex
can be enabled or disabled separately on
individual channels.
Duplex operation allows the TX680 to
transmit on a different frequency to that
which it receives. This allows operation
through repeater stations in your area.
Repeaters automatically re-transmit your
signal over a much wider area, providing
greatly increased range. The Duplex mode
only works on channels 1 – 8 and 41 –
48. With Duplex selected, your TX680
actually transmits 30 channels higher than
it receives.
To Activate the Duplex Mode
Select a duplex channel (1 – 8 or 41
– 48). Briefly press the DUP button to
toggle duplex on or off on that channel.
When Duplex mode is enabled on the
selected channel, ‘DUP’ appears on the
display.