根据统计,由用户内部布线引起的有线电视故障已占到总故障的15%,对此必须给予高度重视。造成故障的原因主要有以下几种: (1)一般认为50%或更多的系统噪声是从用户家中进入的,尤其是双向网络对噪声的控制是非常严格的,一旦处理不好,就会使整个系统噪声大增而崩溃;(2) 由于用户缺乏有线电视的基本知识,在选 According to statistics, by the user’s internal wiring caused by cable TV failures accounted for 15% of the total failure, which must be given great importance. The main causes of failure are as follows: (1) It is generally considered that 50% or more of the system noise is coming in from the user’s home. In particular, the bidirectional network controls the noise very strictly. If it is not handled properly, So that the entire system greatly increased noise and collapse; (2) due to lack of basic knowledge of cable users in the election