本文介绍线路设计中所应用的两种程控信号衰减电路。
Two kinds of program control signal attenuation circuits, which are used in circuit design, are introduced.
但由于电力线路存在着强噪音、信道衰减等原因，严重影响了通信质量。
But, there exists serious noise and channel attenuation in power line and they affect the quality of communication seriously.
文章对线路维护工程中的光缆线路障碍查找、光纤衰减均匀性、光纤接续和偏振模色散（PMD）等问题进行了分析。
This paper discussed the trouble shooting, attenuation uniformity of optical fiber, optical fiber splicing and PMD problem in the maintenance of optical fiber line.
由于实物的立体信息大，而且在数据传输过程中，由于衰减、失真和噪声，会使通信线路上的信号发生错误。
The three-dimensional information of objects is enormous. When the data was transmitted, the error would be occurred in communication lines because of attenuation, distortion and noise.
由于实物的立体信息大，而且在数据传输过程中，由于衰减、失真和噪声，会使通信线路上的信号发生错误。
The three-dimensional information of objects is enormous. When the data was transmitted, the error would be occurred in communication lines because of attenuation, distortion and noise.
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