After amplifying the carrier signal supplied by the high-frequency oscillator,it is transmitted to the stage to be modulated.The signal output by the amplitude modulator controls the stage to generate an amplitude modulation waveform signal.In the design of medium wave emergency broadcasting adapters,it is necessary to study the modulation mode of medium wave signals and the transmission chain of medium wave broadcasting signals,to ensure that the medium wave signals sent by various levels of emergency broadcasting platforms can work together,thereby achieving remote control,decoding,and automatic playback.Based on this,the development and application of the medium wave emergency broadcasting adapter are analyzed from the aspects of scheme architecture,hardware,software,and main module design,and software design issues are discussed in order to improve the overall performance of the broadcasting medium wave emergency broadcasting system.
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