| 阻抗匹配对信号传输质量影响的分析 |
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| 引用本文： | 简钊. 阻抗匹配对信号传输质量影响的分析[J]. 中国有线电视, 2012, 0(11): 1262-1264 |
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| 作者姓名： | 简钊 |
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| 作者单位： | 广东省广播电视网络股份有限公司珠海分公司,广东珠海519000 |
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| 摘 要： | 针对数字电视日常维护中常见的故障现象,从实践到理论分析了有线电视系统中由同轴电缆引起的一些特殊故障,阐述了信号与传输线路之间阻抗匹配的基本原理与概念,进一步验证阻抗的匹配与否直接关系到信号传输质量的优劣,最后总结了导致该类故障的常见因素,给相关维护工作提供参考。
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| 关 键 词： | 同轴电缆 阻抗匹配 特征阻抗 反射损耗 |
Analysis of Impedance Matching Influence on Signal Transmission Quality |
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| JIAN Zhao. Analysis of Impedance Matching Influence on Signal Transmission Quality[J]. China Cable Television, 2012, 0(11): 1262-1264 |
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| Authors: | JIAN Zhao |
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| Affiliation: | JIAN Zhao (Guangdong Cable Co. , Ltd Zhuhai Branch, Guangdong Zhuhai 519000 China) |
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| Abstract: | Base on the common fault phenomenon in daily maintenance of digital television, this article intro- duces some technical problems often ignored and analyses special troubles made by coaxial cables in CATV system connecting theory with practice. Then the basic principles and concepts of impedance matching be- tween signal and transmission line are presented, to prove the consequence of signal transmission quality by impedance matching or not. With the purpose to give some references in maintenance work, a number of com- mon factors, which probable generate the fault phenomenon have summarized in the last place. |
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| Keywords: | coaxial cable impedance matching characteristic impedance reflection loss |
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