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随着国内电视事业的蓬勃发展,无论在城市还是乡村共用天线电视系统已得到了日益广泛的采用。由于系统的接收天线一般安装在建筑物的最高处,并通过同轴电缆与各家各户的电视机相连,因而增加了遭受雷击的危险。因此,在共用天线电视系统中,它的防雷问题十分重要。共用天线电视系统的防雷,一般可分为直击雷和感应雷两种。直击雷是指雷电对大
With the vigorous development of the domestic television industry, the sharing of antenna television systems in both urban and rural areas has been increasingly adopted. Since the receiving antenna of the system is generally installed at the highest point of the building and is connected to the televisions of various households through coaxial cables, the risk of lightning strikes is increased. Therefore, in the shared antenna television system, its lightning protection issue is very important. The lightning protection of the shared antenna television system can generally be divided into direct lightning and induced lightning. Direct lightning refers to thunder and lightning