带有连接电缆的“NTN”校准技术  

"Nose-to-nose" Calibration Procedure with a Cable

作　　者：卢峰[1] 刘明亮[1] 郁月华[2] 

机构地区：[1]北京工业大学电子信息与控制工程学院,北京100022 [2]中国计量科学研究院,北京100013

出　　处：《计量学报》2005年第1期66-69,共4页Acta Metrologica Sinica

摘　　要：在利用"NTN"校准技术对取样示波器进行校准时,为保证校准精度,要求两台取样示波器的输入端直接对接。但在实际运用中,为方便起见,常常将两台取样示波器的输入端用电缆连接在一起。显然,电缆的接入,将对"kick out"脉冲的响应波形产生影响,这就要求在数据处理中扣除电缆的影响。详细介绍了带有电缆的"NTN"校准技术的实验设置、数据预处理算法(包括去时基抖动处理、消除取样电路的非对称性的方法等)、"kick out"脉冲的反卷积分离以及扣除电缆影响的算法。最后,给出取样示波器阶跃响应的波形并进行了评价。When the sampling oscilloscopes are calibrated using the nose-to-nose (NTN) calibration procedure, the two oscilloscopes input channels should be connected directly to ensure the accuracy of the results. But in practice, the two oscilloscopes input channels are connected with a cable for convenience. Obviously, the existence of the cable will affect the response of the kick-out pulse, this requires to deduct the effect of the cable when processing the data. The experimental setup, data preprocessing algorithm (including removing timing jitter and the asymmetry of the sampling circuit), deconvolution separation algorithm and the algorithm for deducting the effect of the cable of the nose-to-nose calibration with a cable are described in detail. Finally, the waveform of the step response of the sampling oscilloscopes and relative appraisement are given.

关 键 词：计量学 NTN校准技术 PDF反卷积 电缆 

分 类 号：TB973[一般工业技术—计量学]