取样示波器时基抖动的修正  

Correction of Time-base Jitter of Sampling Oscilloscopes

作　　者：龚鹏伟 马喆[1,2] 马红梅 杨春涛[1,2] 

机构地区：[1]北京无线电计量测试研究所,北京100039 [2]计量与校准技术国防科技重点实验室,北京100039

出　　处：《宇航计测技术》2011年第1期17-20,共4页Journal of Astronautic Metrology and Measurement

摘　　要：针对取样示波器时基抖动对被测信号的影响,建立取样示波器时基抖动的信号模型,进行理论分析,并用最小二乘法估计时基抖动的方差,然后通过概率密度反卷积法去除时基抖动。通过实测数据进行计算,发现该方法能最大程度地修正取样示波器时基抖动对被测信号的影响。The presence of time-base jitter in equivalent-time sampling oscilloscope causes distortion of the recorded waveform.The signal model of the time-base jitter of sampling oscilloscope is given and analyzed,which is fit for general wideband sampling oscilloscope.The variance of time-base jitter is estimated,based on the least squares method,and the time-base jitter is removed through probability density function（pdf） deconvolution method.According to actual experiment data,the effects of time-base jitter of sampling oscilloscope can be corrected mostly.

关 键 词：计量学 取样示波器 +时基抖动 +反卷积 

分 类 号：TM935.38[电气工程—电力电子与电力传动]