【摘要】 取样示波器是自动脉冲测试系统中的一个主要组成单元。取样时基抖动噪声是影响时域波形采集精度的主要误差源之一,本文利用数字反卷积方法大大减小了这种噪声的影响。首先用统计方法确定出取样时间抖动分布的概率密度函数,然后将此函数作为卷积核,与实测波形的若干次平均结果实行反卷积,其结果便是抖动影响已被大大减小的测试波形,从而使系统的测试精确度得到提高。文中给出一些计算机模拟结果,它们都令人满意地证明了本文所述方法的成功。更多还原

【Abstract】 A sampling oscilloscope is one of the main units in automatic pulse measurement system (APMS). The time jitter in waveform samplers is an important error source that affect the precision of data acquisition. In this paper, this kind of error is greatly reduced by using the deconvolution method. First, the probability density function (PDF) of time jitter distribution is determined by the statistical approach, then, this PDF is used as convolution kern to deconvolve with the acquired waveform data with additional averaging, and the result is the waveform data in which the effect of time jitter has been removed, and the measurement precision of APMS is greatly improved. In addition, some computer simulations are given which prove the success of the method given in this paper.更多还原