IEC 62153-4-7:20 21 RLV包含官方IEC国际标准及其红线版本。Redline版本仅提供英文版本，为您提供了一种快速简单的方法来比较IEC官方标准与其以前版本之间的所有变化。 IEC 62153-4-7:20 21涉及三轴管中管法。这种三轴方法适用于确定配合屏蔽连接器（包括电缆和连接器之间的连接）和电缆组件的表面传递阻抗和/或屏蔽衰减和耦合衰减。该方法还可以扩展到确定平衡或多针连接器和多芯电缆组件的传输阻抗、耦合或屏蔽衰减。本第三版取消并取代2015年出版的第二版及其修正案1:2018.与上一版相比，此版本包括以下重大技术变更: -附件E包含关于直接测量连接器屏蔽有效性的信息； -附录F给出了关于混合模式参数的规范性信息； -附录G包含有关测量耦合衰减的附件的规范性信息； -附录H讨论了低频屏蔽衰减。

IEC 62153-4-7:2021 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.

IEC 62153-4-7:2021 deals with the triaxial tube in tube method. This triaxial method is suitable to determine the surface transfer impedance and/or screening attenuation and coupling attenuation of mated screened connectors (including the connection between cable and connector) and cable assemblies. This method could also be extended to determine the transfer impedance, coupling or screening attenuation of balanced or multipin connectors and multicore cable assemblies. This third edition cancels and replaces the second edition published in 2015 and its Amendment 1:2018.This edition includes the following significant technical changes with respect to the previous edition:
- Annex E contains informative information about the direct measurement of screening effectiveness of connectors;
- Annex F gives normative information about mixed mode parameters;
- Annex G contains normative information about accessories for measuring coupling attenuation;
- Annex H discusses the low frequency screening attenuation.