有线电视线路信号电平“跳跃式”变化原因试析

About “Bouncing” Changing Cause of the Signal Level in CATV Circuit

对于从系统前端输出电平比较平坦的信号 ,经过一段距离后 ,除了具有一定的斜率外 ,还形成“跳跃式”变化的超常规情形 ,情况严重时 (指影响用户收看 )维修技术人员变得束手无策 ,无法处理。从理论上分析形成这一现象的原因 ,并从实践上提出避免这种现象的措施。

The smoothe level signal from the leading end of system would not only have definite slope,but also bring bouncing divergency that was a transnormal situation.This situation is often inscrutable and when it comes to bad,serviceman will be begond repair.Analyses the theoretical reason and advances the key to avoid this situation in practice.