中国有线电视
中國有線電視
중국유선전시
CHINA CABLE TELEVISION
2012年
11期
1262-1264
,共3页
同轴电缆%阻抗匹配%特征阻抗%反射损耗
同軸電纜%阻抗匹配%特徵阻抗%反射損耗
동축전람%조항필배%특정조항%반사손모
coaxial cable%impedance matching%characteristic impedance%reflection loss
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。
針對數字電視日常維護中常見的故障現象，從實踐到理論分析瞭有線電視繫統中由同軸電纜引起的一些特殊故障，闡述瞭信號與傳輸線路之間阻抗匹配的基本原理與概唸，進一步驗證阻抗的匹配與否直接關繫到信號傳輸質量的優劣，最後總結瞭導緻該類故障的常見因素，給相關維護工作提供參攷。
침대수자전시일상유호중상견적고장현상，종실천도이론분석료유선전시계통중유동축전람인기적일사특수고장，천술료신호여전수선로지간조항필배적기본원리여개념，진일보험증조항적필배여부직접관계도신호전수질량적우렬，최후총결료도치해류고장적상견인소，급상관유호공작제공삼고。
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.
