A Novel Evaluation Method for Sampling Uniformity of Nonuniformly Sampling Data Acquisition Systems
Liang Zhi-guo · Jiliang xuebao · 2006
A method to evaluate the sampling uniformity is presented,it deals with the nonuniformly sampling data acquisition systems.By using sinusoidal stimulating and then re-sampling the data to create sub-series of each sub-A/D converter,through curve-fit results of sub-series sinusoidal waveforms,the phase difference between two sub-series can be obtained.The time difference corresponding the phase difference is the sampling time delay between two sub-A/D,their consistency is the sampling uniformity of nonuniformly sampling systems.In a set of simulation tests,the correctness of the method is validated.In practical experiment on a digital storage oscilloscope,the effective results are got,and the feasibility of the method is proved.The method can be used to evaluate the sampling uniformity of nonuniformly sampling data acquisition systems.