channel will be overwritten.
▍Sub-Audio Tones
CTCSS (Continuous Tone Coded Squelch System)
CTCSS is a technique that transmits a frequency below the audible
range (67-254.1Hz) along with the audio signal. Because its frequency
range is below standard audio frequencies, specifically less than 300Hz,
it is also referred to as sub-audio.
CDCSS (Cont inuous Digital Coded Squelch System)
CDCSS serves the same function as CTCSS but differs in that it uses a
digital code to determine whether squelch is activated. It consists of a
fixed code group that is cyclically transmitted. As its frequency is also
below 300Hz, it is known as digital sub-audio or digital sub-tone.
◉ In the non-standard analog sub-tone editing mode, non-standard
sub-tones can be directly inputted.
▍FM Radio Function
Press the 【 FM Key 】 to activate the radio function, and the current
frequency of the radio will be displayed on the screen. You can adjust
the radio frequency using the 【Up/Down Keys】 or directly enter the
frequency (range 65.000~108.000MHz) using the numeric keypad.
While in radio mode, press the 【 A/B Key 】 to enter the automatic
station search mode. Press the 【 FM Key 】 again to exit the radio
mode.
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