全时域电磁干扰测量系统的动态性能评价

M. Azpúrua, Marc Polis, M. Femandez, Ferran Silva
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引用次数: 9

摘要

本文从噪声系数、线性度、动态范围、电压驻波比和串扰等方面对全时域电磁干扰测量系统的性能进行了评价。上述参数允许对基于示波器的CISPR 16-1-1测量接收器的实现进行更广泛的表征,提供超出标准化基线要求的相关规格。这些指标是使用符合时域EMI测量要求的实际设置和操作条件进行评估的。对于实验中使用的特定示波器,在5 mV/div和1 V/div之间的所有不同垂直范围内测量噪声系数。同样,测量了有效值电压在20 mV到1 V之间的正弦波输入信号的线性度和动态范围(以有效位数表示)。在CISPR频带A、频带C/D上分别使用10 kHz、1 MHz和100 MHz正弦波重复该实验。结果允许在Full-TDEMI测量系统和完全在频域指定的更传统的超外差架构接收器之间进行更全面的比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamic Performance Evaluation of Full Time Domain EMI Measurement Systems
This paper presents the evaluation of the performance of Full Time Domain Electromagnetic Interference measurement systems in terms of the noise figure, the linearity, the dynamic range, the voltage standing wave ratio and the crosstalk. The abovementioned parameters allow a broader characterization of the oscilloscope-based implementations of CISPR 16-1-1 measuring receivers, providing relevant specifications that are beyond the standardized baseline requirements. Such metrics are assessed using the actual settings and operating conditions required for compliant time-domain EMI measurements. For the specific oscilloscope used in the experiments, the noise figure is measured for all the different vertical ranges between 5 mV/div and 1 V/div. Likewise, the linearity and the dynamic range, in terms of the effective number of bits, was measured for sine wave input signals with an rms voltage swept between 20 mV and 1 V. This experiment was repeated for CISPR bands A, Band C/D using 10 kHz, 1 MHz, and 100 MHz sinusoids, respectively. The results allow a more comprehensive comparison between Full-TDEMI measurement systems and the more conventional superheterodyne architecture receivers that are completely specified in the frequency domain.
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