标准摘要
[中文适用范围]： 本技术报告是对 IEC 61156-1:2002（第 2 版）中对称对/四线电缆的电气传输特性的修订，这些内容未保留在 IEC 61156-1:2007（第 3 版）中。本技术报告包括来自 IEC 61156-1:2002 的以下主题：3.3.6 中的特性阻抗测试方法和函数拟合程序；附录 A 涵盖基本传输线方程和测试方法；附录 B 涵盖开/短路法；附录 C 涵盖不平衡衰减。 [外文原描述]： IEC/TR 61156-1-2:2009(E) is a revision of the symmetrical pair/quad electrical transmission characteristics present in IEC 61156-1:2002 (Edition 2) and not carried into IEC 61156-1:2007 (Edition 3). This technical report includes the following topics from IEC 61156-1:2002 - the characteristic impedance test methods and function fitting procedures of 3.3.6; - Annex A covering basic transmission line equations and test methods; - Annex B covering the open/short-circuit method; - Annex C covering unbalance attenuation.
英文名称Multicore and symmetrical pair/quad cables for digital communications - Part 1-2: Electrical transmission characteristics and test methods of symmetrical pair/quad cables