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在广播电视发射台,通常有多个频率的发射机同时播出不同的节目内容,随着频道的增多,天线位置不够用,而且每部发射机都要配一副天馈,导致投资过高、维护成本过大。电视三工系统暨新的天馈系统是新型科技产品,可有效克服上述缺点。笔者基于本台工作实践,重点阐述星形电视三工器暨双天馈的原理,并探讨实际应用实践及调试。
At a radio and television transmitting station, usually multiple transmitters of different frequencies broadcast different program contents at the same time. As the number of channels increases, the antenna position is not sufficient and each antenna feeder is allocated with an antenna feeder, resulting in excessive investment , The maintenance cost is too big. TV trio system and the new antenna system is a new type of technology products that can effectively overcome the above shortcomings. Based on the work of this station, the author focuses on the principle of star TV triplexer and dual-day feed, and discusses the practical application and debugging.