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调频多工广播 调频多工广播是利用调频广播的基带频谱空余部分,通过增设附加信道来传输声音、数据等各种业务信息,其频率配置如图1所示。 附加信道语言声音广播(SCA)接收质量较差且有偿服务不易解决,所以发展缓慢;广播数据系统(RDS)因其数据速率仅1.1875kb/s,只能传输低速数据。近年来,SCA数据广播业务迅速兴起,它是利用频率较高的附加信道(如SCA2)开发高速数据广播业务,其实质仍属于RDS业
FM multiplex broadcast FM multiplex broadcast is the use of FM radio baseband part of the spectrum by adding additional channels to transmit voice, data and other business information, the frequency configuration shown in Figure 1. Due to its poor reception quality and poorly paid service, the RDS is slow to develop. Due to its data rate of only 1.1875kb / s, the RDS can only transmit low-speed data. In recent years, the SCA data broadcasting business is rapidly emerging. It is to develop high-speed data broadcasting services using additional channels of high frequency (such as SCA2), and its essence still belongs to the RDS industry