标准摘要
[中文适用范围]： IEC 62153的本部分适用于金属通信电缆。它规定了测定屏蔽平衡电缆耦合衰减aC的测试方法。由于采用同心外管，测量不受圆周不规则性和外部电磁场的影响。宽动态和频率范围甚至可以使用普通仪器来测试超级屏蔽电缆，从低频到外部电路中定义的横波极限（大约 4 GHz）。然而，上限频率受到巴伦特性的限制。测量耦合衰减 aC 的程序基于根据 IEC 62153-4-5 测量屏蔽衰减 aS 的程序。 [外文原描述]： IEC 62153-4-9:2008(E) applies to metallic communication cables. It specifies a test method for determining the coupling attenuation of screened balanced cables. Due to the concentric outer tube, measurements are independent of irregularities on the circumference and external electromagnetic fields. It replaces IEC/PAS 62338:2002(E).
英文名称Metallic communication cable test methods - Part 4-9: Electromagnetic compatibility (EMC) - Coupling attenuation of screened balanced cables, triaxial method