In this article, a method able to perform “virtual” signal integrity test on twisted-wire pairs (shielded or not) is presented. The method is based on S -parameter measurements collected in the case of a bulk current injection test setup. A common-to-differential-mode conversion is applied in postprocessing on these measurements in order to superimpose the effect of the measured disturbance to the useful signal, which is generated numerically. Then, the signal integrity of the cable under test can be verified as a function of the magnitude of the disturbance, the common-to-differential-mode conversion rate, and the useful signal waveform in reason of the linearity of the problem. The method, which allows a comparison between different kind of cables to be performed on a rigorous basis, is illustrated from experimental measurements made in the frequency range from 10 to 400 MHz in the case first of a square signal and second of a 100BASE-T1 fast Ethernet protocol signal.

中文翻译：

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使用大电流注入装置对屏蔽/非屏蔽双绞线进行“虚拟”信号完整性测试


在本文中，提出了一种能够对双绞线（屏蔽或非屏蔽）执行“虚拟”信号完整性测试的方法。该方法基于在大电流注入测试设置情况下收集的 S 参数测量结果。在这些测量的后处理中应用共模到差模转换，以便将测量到的干扰的影响叠加到以数字方式生成的有用信号上。然后，由于问题的线性，可以将被测电缆的信号完整性验证为干扰幅度、共模到差模转换率以及有用信号波形的函数。该方法允许在严格的基础上对不同类型的电缆进行比较，并通过在 10 至 400 MHz 频率范围内进行的实验测量来说明，其中第一个是方波信号，第二个是 100BASE-T1快速以太网协议信号。