▍DTMF
To enter the DTMF encoding editing interface, input the required DTMF
codes via the keyboard. If the code is less than 6 digits, conclude with
the FM key. After entering the code, press the PTT button to send the
encoding. In editing mode, press Side Key 3 briefly to delete a code; if
all codes are cleared, pressing Side Key 3 again will exit the DTMF
editing mode.
The corresponding codes are as follows：
◉ Only supports custom setting of a short press on Side Key 3 through
menu item 40 to quickly enter DTMF mode.
▍Weather Forecast
In severe weather conditions, such as intense thunderstorms or
hurricanes, the NOAA (National Oceanic and Atmospheric
Administration) will issue weather alerts along with a 1050 Hz tone,
followed by subsequent weather reports broadcast on NOAA's weather
channels.
International Standard Frequency Chart：
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