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随着人们生活水平的提高,电视机早已涌进了亿万家庭。近年来,与电视机配套的家用电器品种又层出不穷,这些电器除小部分可用音、视频接口与电视机接驳外,还有一些,只好从射频接口(天线插口)接入。所有的电视机都只准备了一个天线插口,那么,二个以上的射频信号怎样同时输入?普通并联,容易产生串扰;轮流更换插头线,不仅不方便,又极容易损坏天线插座。这就指出一个电视射频信号混合的问题。另外,许多家庭和单位,已不止有一台电视机。有的会出现几部
As people’s living standards improve, televisions have already poured into hundreds of millions of families. In recent years, with the TV supporting a variety of household appliances are endless, in addition to a small part of these appliances available audio and video interface and TV connection, there are some, but from the radio frequency interface (antenna jack) access. All TV sets are only equipped with an antenna jack. How to input more than two RF signals at the same time? Common parallel connection is prone to crosstalk. Alternating the plug line in turn is not only inconvenient but also very easy to damage the antenna socket. This points to the problem of mixing a television RF signal. In addition, many families and units have more than one television set. Some will appear several