数字式电缆对线器

Digital cable onthe line device

介绍了一种新型的数字式电缆对线器,简述了它的结构、电气指标和基本原理,分析了A/D转换电路、秒定时电路、取样电阻等主要单元电路的工作原理,并给出了数字式电缆对线器电路调测的主要测试要点。

This paper introduces a new type of digital cable on line,the structure, electrical parameters and its basic principle, analyzes the working principle of A/D conversion circuit, second timing circuit, sampling resistance and the working principle of main circuit, gives the main testing points of digital cable on line circuit test.