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地面数字广播电视是因为人们日益增长的精神文化需求,开始对传统单一模式的模拟广播电视不满足而产生的文化产业必然发展,因为地面数字广播电视与模拟广播电视的发射组成结构基本相同,所以它的发送系统是在原来模拟发射台建立的基础上建立改造而成的,它依照原有的模拟电视的发送系统设备和原有的接收天线,通过使用多工器来完成RF功率合成、多频道放大器合成,为地面数字广播电视的建立节省了大量成本。本文对地面数字广播电视发送系统的设立、地面数字广播电视发送系统改造使用模拟广播电视的发送天线的两种方法进行了简单探讨。
Due to the growing spiritual and cultural needs of the people, the digital terrestrial television and television broadcasting industry inevitably develops since the beginning of the dissatisfaction with the traditional single mode analogue broadcasting and television. Since the composition of the terrestrial digital television and the analogue broadcasting and television transmission are basically the same, Its transmitting system is built on the basis of the original analog transmitting station, which is based on the original transmitting system equipment of analog TV and the original receiving antenna, and uses the multiplexer to complete the RF power combining. Channel amplifier synthesis, for the establishment of terrestrial digital radio and television save a lot of cost. This article briefly discusses the establishment of terrestrial digital broadcast and television transmission system and the modification of the terrestrial digital broadcast and television transmission system by using the two methods of simulating the transmitting and receiving antenna of broadcast television.