数字示波器频带宽度的测量不确定度评定与分析

Evaluation and Analysis of Uncertainty of Bandwidth Measurement of Digital Oscilloscopes

为了实现对数字示波器频带宽度的测量结果的不确定度评定,根据数字存储示波器校准规范提供的方法,对数字示波器频带宽度进行测量。分析了示波器频带宽度的测量结果的不确定度来源,讨论了数字示波器频带宽度测量结果的表示方法。以安捷伦公司的DSO6052A数字示波器为例,详细介绍了数字示波器频带宽度测量结果的评定过程,给出了评定结果表达形式。经实践证明该方法准确、有效,可供撰写示波器检定装置建标报告和示波器带宽不确定度评定方面参考。

In order to realize the evaluation of bandwidth measurement of digital oscilloscopes, ac- cording to the method of digital oscilloscope calibration standard, measures the bandwidth of oscillo- scopes. In this paper, analyses the uncertainty sources of measurement result. To Agilent DSO6052A digital oscilloscopes as an example, the paper introduces the measurement result uncertainty evaluation process of the bandwidth of digital oscilloscopes, and given the evaluation results. Practice proves that the method is correct and effective, which can be referenced for writing oscilloscope verification device standard report and evaluation of bandwidth of oscilloscopes.