标准摘要
[中文适用范围]： 本部分IEC 61156规定了对称对/四线电气传输特性和测试方法，这些方法存在于IEC 61156-1:2002（第2版）中，但未纳入IEC 61156-1:2007（第3版）。它详细描述了特性阻抗测试方法和函数拟合程序、开路/短路方法以及不平衡衰减测量的背景。此外，还扩展了对balunless测量技术的描述，这是对之前技术报告的修正，并进行了改进并纳入本新版。完整文档已转换为技术规范。 [外文原描述]： IEC TS 61156-1-2:2023 specifies symmetrical pair/quad electrical transmission characteristics and test methods present in IEC 61156-1:2002 (Edition 2) and not carried into IEC 61156-1:2007 (Edition 3). It details characteristic impedance test methods and function fitting procedures, the open/short-circuit method and the background of unbalance attenuation measurement. It is extended by a description of the balunless measurements technique, which is an amendment to the former technical report and is improved and incorporated into this new edition. The complete document is transferred into a technical specification.
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