广电中波应急广播适配器的设计及应用研究

Design and Application of Medium Wave Emergency Broadcast Adapterin Radio and Television

放大由高频振荡器供给的载波信号后,输送到被调级,由调幅器输出的信号控制被调级,产生调幅波形信号。在中波紧急广播适配器设计中,需对中波信号的调制模式和中波广播信号的传送链进行研究,确保各级应急广播平台发送的中波信号能够协同工作,从而实现远程控制、译码和自动播放。基于此,从方案架构、硬件、软件、主要模块的设计等方面对中波应急广播适配器的开发与应用进行分析,并对软件设计问题进行探讨,以期提高广电中波应急广播系统的整体性能。

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.