IEC/TR 62153-4-0-2007 金属通信电缆试验方法.第4-0部分:电磁兼容性(EMC).表面传输阻抗与屏蔽衰减推荐范围间的关系

标准号：IEC/TR 62153-4-0-2007
中文标准名称：金属通信电缆试验方法.第4-0部分:电磁兼容性(EMC).表面传输阻抗与屏蔽衰减推荐范围间的关系
英文标准名称：Metallic communication cable test methods - Part 4-0: Electromagnetic compatibility (EMC) - Relationship between surface transfer impedance and screening attenuation, recommended limits
标准类型：K13
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：K13
国际标准分类号：33.100;33.120.10
引用标准：IEC/TR 61917
适用范围：This technical report describes important background material used during the revision ofIEC 61196-1:1995, Clause 14, Guidance for surface transfer impedance and screeningattenuation limits for flexible r.f. cables.In this technical report, the relationship between surface transfer impedance (ZT) andscreening attenuation (as) is given, also measurements of ZT and as are provided to show thecorrelation of mean screening attenuation between 200 MHz and 500 MHz and ZT at both30 MHz and 300 MHz.The sensitivity of as to the relative velocity difference between the inner and outer system isshown. The cable data sheet should show the as values in a standardized form– Δv/v = 10 % and the characteristic impedance of the outer system is 150 Ω. It is also shownthat a relative velocity difference change from 10 % to 40 % gives an improvement of 12 dB inscreening attenuation.