PDH/SDH通信网中抖动发生及检测方法  

Generation and measurement of jitter in PDH/SDH networks

作　　者：牛玲[1] 段美霞[2] 

机构地区：[1]周口师范学院,河南周口466001 [2]华北水利水电学院,郑州450011

出　　处：《光通信技术》2012年第10期60-61,共2页Optical Communication Technology

基　　金：河南省教育厅自然科学研究计划项目(2009B520033)资助

摘　　要：采用DDS作为低频可控调制信号源对高频时钟信号进行调制,产生可控抖动信号源,利于锁相环技术对抖动信号进行检测和测量。实践证明,该设计方案被成功应用于PDH/SDH数字传输分析仪的抖动测试电路中,电路性能优异。The jitter is caused by clock abstraction and pointer adjustment in the PDH/SDH network.The measurement of jitter is crucial to guarantee the the network working normally.A schedule for measuring jitter is proposed that the source signal with jitter is generated by the low frequent signal based on DDS technology modulating the carry clock.The jitter signal can be measured based on phase-lock-loop technology.The resolution succeed in jitter circuit of PDH/SDH,The performance is excellent.

关 键 词：PDH SDH 抖动 DDS 调制 锁相环 

分 类 号：TM935.21[电气工程—电力电子与电力传动] TN929.11[电子电信—通信与信息系统]