本文介绍将微型计算机技术应用于测量线,采用功率反射法测同轴电缆衰减。计算机辅助测试(CAT)可提高测量速度,测量精度与手动测量时相当。衰减是表征同轴电缆特性的主要参数之一,它表示电磁波沿同轴电缆传播时单位长度的功率损耗量。测量同轴电缆衰减的通用方法是功率反射法。该方法的突出优点是,对待测样品(包括电缆两端的接头)没有特殊要求,可以区分反射引起的衰减和电缆本身损耗引起的衰减。测量衰减量的范围可从几分之一分贝到几分贝。这个方法的缺点是工作量大、耗时多,一般测一个频率点上的衰减需半天时间,因而,对测试系统 This article introduces the microcomputer technology applied to the measurement line, using the power reflection method to measure coaxial cable attenuation. Computer-aided testing (CAT) can increase the measurement speed, measurement accuracy and manual measurement of the same. Attenuation is one of the main parameters characterizing a coaxial cable. It represents the amount of power loss per unit length of an electromagnetic wave propagating along a coaxial cable. The common method of measuring coaxial cable attenuation is the power reflection method. The outstanding advantage of this method is that there is no special requirement on the sample to be tested (including the connectors at both ends of the cable), so that the attenuation caused by reflections and the attenuation caused by the loss of the cable can be distinguished. The amount of attenuation measured can range from a few decibels to decibels. The disadvantage of this method is heavy workload, time-consuming, generally measured at a frequency point of attenuation half a day, so the test system