IEC 62153本部分规定了根据IEC 62153-4-3、IEC 62153-4-4[1]1和IEC 62153-4-15，用三轴装置测量时，将传输阻抗的测试结果外推至更高频率，以及屏蔽衰减的测试结果外推至更低频率的方法。该方法适用于均质筛网，即传输阻抗与长度成正比的筛网。传输阻抗可以具有任何频率特性，即，在箔和编织物制成的屏幕上，传输阻抗不会以每十年20 dB的速度增加。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This part of IEC 62153 specifies a method to extrapolate the test results of transfer impedance to higher frequencies and the test results of screening attenuation to lower frequencies when measured with the triaxial set-up in accordance with IEC 62153-4-3, IEC 62153-4-4 [1]1and IEC 62153-4-15. This method is applicable for homogenous screens, i.e. screens having a transfer impedance directly proportional to length. The transfer impedance can have any frequency behaviour, i.e. it could have a behaviour where it does not increase with 20 dB per decade as observed for screens made of a foil and a braid.All current amendments available at time of purchase are included with the purchase of this document.