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While transmitting using the PTT key, simultaneously press Side Key 3 for
the tone audio call function. The radio will transmit audio in the range of
1000-1750KHz. Release the monitoring key to exit.
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Set this function through menu item 28.
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Scan Function
Before using the scan function, you must first determine how the radio
should continue scanning after detecting a signal. You can choose one
of the following modes:
Tone Operated (TO) Mode:
The radio stops scanning and remains on the same frequency when it
detects a signal. After staying in the stopped state for approximately 5
seconds, even if the signal is still present, the radio will continue scanning.
Carrier Operated (CO) Mode:
The radio stops scanning and stays on the same frequency when it
detects a signal. It will continue scanning once the signal disappears.
There is a 2-second delay between the signal disappearance and the
resumption of scanning to allow time for response transmission.
Search (SE) Mode:
The radio exits scanning and stays on the frequency when it detects a
signal.
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In scan mode, you can use the "Up" and "Down" keys to change the
scanning direction.
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DTMF
Enter the DTMF code editing interface and enter the desired DTMF code
using the keypad. If the code is less than 6 digits, press the FM key to end