本文是要是从“CATV”系统电缆故障维护难题出发,引出了时域反射测量技术。使这一项非常有用的测量手段,在计算机时代又获得了新的生命力。同时对时域反射测量技术的工作原理、应用举例及在“CATV”系统中的故障判断,也做了较详细的介绍。 This article is from the “CATV” system cable fault maintenance problems, led to time-domain reflectometry. Making this a very useful measure of measurement has gained new vitality in the computer age. At the same time, the working principle of time-domain reflectometry, application examples and fault judgments in the “CATV” system are also introduced in more detail.