阐述了该系统的设计思想和实现方法，详细分析了该系统的工作原理和单极性不归零码与双极性归零码的相互转换方法。
It states designing idea and realizing method of the system , analyses in detail the working principle of the system and mutual transforming method of NRZ code and AMI code .
单极性不归零码