18 | CT310 Instruction Manual
TX Power selection
In standby mode, press FUNC, the top left corner of LCD displays icon,
then press HI/LO to choose High/Low power for the channel in use.
1. When LCD displays “L” icon, it means low power is selected.
2. When LCD displays “H” icon, it means high power is selected.
Stopwatch function
1. In standby mode, , press FUNC, the top left corner of LCD displays
icon, then press S.W to enter into stopwatch function.
2. Press S.W to start timing. Press #/ENT to pause timing. When timing is
pause, press S.W to continue timing.
3. Press PF1, PF2 to exit stop watch function.
NOTE: During timing, press S.W key to stop timing and displays current data,
press this key again to clear timer.
DTMF code Transmit and Enquiry
1. Press FUNC, the top left corner of LCD displays icon, then press
DTMF; the LCD displays DTMF data and group number (total 16 groups)
of current group.
2. Rotate the channel switch to choose the desired group and DTMF data,
press PTT to transmit the selected DTMF signaling. If current group does
not edit DTMF data, the LCD displays “EMPTY”.
3. When current group displays “EMPTY”, press FUNC , the top left corner
of the LCD displays icon, press and hold DTMF until the transceiver
emits “DU” beep, the transceiver enters into DTMF edit state, LCD
displays “___________”, now you can enter the desired DTMF data through
the keypad.
4. When finished editing, press side key PF2 to save DTMF signaling.
Keypad lock
In order to prevent wrong operation, the keypad can be locked. In standby
mode, press FUNC, the top left corner of the LCD displays icon, then press
and hold until the transceiver emits “DU” beep, the LCD displays icon.
Now the keypad is locked. Repeat the above operation to unlock the kaypad.
The icon disappears.
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