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近年来,共用天线电视系统发展极为迅速,并向大型化、多路化和多功能方面发展.它不仅能用来传送电视台发送的节目,而且还可以传送自办节目,比如在闭路电视系统中传送文化教育、技术交流、公共服务、商业情况图象信息资料等方面的内容.我们利用传输线变压器原理研制了全频道电视信号混合器.这种宽频带的电视信号混合器具有容易制做、结构简单、轻便和价廉等显著优点,因此该器件广泛用于共用天线电视系统中.传输线变压器的原理在许多书刊上均有介绍,这里简介两路电视信号混合器的基本原理,较详细的介绍一下如何制做两路全频道电视信号混合器.
In recent years, the common antenna television system has been developed very rapidly and has been developed to be larger, more multiplexed and more versatile, which can be used not only to deliver programs transmitted by television stations but also to deliver self-programming such as in closed circuit television systems Transmission of cultural and educational, technical exchanges, public services, commercial information such as image information, etc. We use the principle of transmission line transformer developed a full-channel TV signal mixer.This wideband TV signal mixer with easy to make, structure Simple, lightweight and inexpensive, so the device is widely used in the common antenna TV system.The principle of transmission line transformers are introduced in many books and magazines, the basic principle of two-way TV signal mixer introduced here, a more detailed introduction How to make two full-channel TV signal mixer.