CT690 user’s manual
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Basic operations
Power/volume switch
Turn the
Power/Volume
switch clockwise to switch on the radio; turn it
counter-clockwise to switch it off.
Turn the knob to about half way to adjust the volume to a comfortable level.
Transmitting and receiving
Press the
PTT
to transmit and speak into the microphone. The display and the
led will light up red.
Release the
PTT
and the radio switches to reception mode. Now the display
and the led will turn green.
CALL button
Press it for a short time to turn on the FM radio. Press it again to turn it off.
If you press it for a long time you will activate the alarm function. Press it again
to turn off this feature.
Monitor key
Press it for a short time to light up the flashlight. If you push this button again,
the flashlight will light up to strobo mode.
Press
MON
a third time to turn off the flashlight.
To activate the Monitor function press the button for a long time .
Band Key
It allows you to change the frequency band shift (VHF or UHF);
When you are listening to FM radio, press this button to switch between the
FM radio bands 65-75/76-108MHz shift;
In transmitting mode, push it to send a 1750Hz call tone.
Scan function
Push the
SCAN
key for a short time to activate the RX/TX reverse function.
If you press this button for more than 2 seconds, you activate the frequency
or channel scanning.
In FM radio mode, press it to automatically search FM stations.
In CTCSS/DCS mode, press this key to start the CTCSS/DCS code scanning.
