The Uncertainty Evaluation of Rise Time of Digital Storage Oscilloscopes
LIANG Zhi-guo
National Key Laboratory of Science and Technology on Metrology and Calibration, Changcheng Institute of Metrology and Measurement, Beijing 100095, China
Abstract The uncertainty of evaluation results of transient duration (rise time) of digital storage oscilloscope (DSO) by the step input method is described, including the courses of analysis and evaluation of uncertainty of it.Some error sources of rise time evaluation are discussed, including the signal rise time & its errors, the time base errors of DSO, the amplitude measuring errors of DSO, the effect of the slope of the curve, the repeatability errors, and the others.The uncertainty model of rise time of DSO is given, and several main methods about decreasing the rise time evaluation errors and evaluation uncertainty are proposed.Combining with an example of experiment, the analysis and uncertainty evaluation results of rise time with the method is presented.
2012, Vol. 33 
