标准摘要
[中文适用范围]： 本部分IEC 62153适用于金属通信电缆。它规定了一种测试方法，用于确定屏蔽平衡电缆的耦合衰减aC。由于同心的外管，测量不受圆周不规则性和外部电磁场的影响。 可以应用广泛的动态和频率范围来测试甚至超屏蔽电缆，使用普通仪器从低频到外电路中定义的横向波的极限，大约4 GHz。然而，当使用平衡器时，上限频率受平衡器特性的限制。 测量可以按照IEC 62153-4-4的标准管程序（或标准测试头）或开放管（开放测试头）程序进行。 本文描述的测量耦合衰减aC的程序基于测量屏蔽衰减aS的程序，根据IEC 62153-4-4。 [外文原描述]： IEC 62153-4-9:2018+AMD1:2020+AMD2:2024 CSV applies to metallic communication cables. It specifies a test method for determining the coupling attenuation aC of screened balanced cables. Due to the concentric outer tube, measurements are independent of irregularities on the circumference and external electromagnetic fields. A wide dynamic and frequency range can be applied to test even super screened cables with normal instrumentation from low frequencies up to the limit of defined transversal waves in the outer circuit at approximately 4 GHz. However, when using a balun, the upper frequency is limited by the properties of the balun. Measurements can be performed with standard tube procedure (respectively with standard test head) according to IEC 62153-4-4 or with open tube (open test head) procedure. The procedure described herein to measure the coupling attenuation aC is based on the procedure to measure the screening attenuation aS according to IEC 62153-4-4. This second edition cancels and replaces the first edition published in 2008. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - two test procedures, open head and standard head procedure; - measuring with balun or with multiport respectively mixed mode VNA; - extension of frequency range up to and above 2 GHz.
英文名称Metallic communication cable test methods - Part 4-9: Electromagnetic compatibility (EMC) - Coupling attenuation of screened balanced cables, triaxial method