标准摘要
[中文适用范围]： 补充了处理音频谐波失真和互调、互调嗡嗡声和射频互调的 IEC 244-4，描述了信号发生器和组合网络以及射频互调的互调测试 [外文原描述]： This publication describes standard methods to be used for measuring non-linearity distortions.
英文名称Supplement A - Methods of measurement for radio transmitters - Part 4: Amplitude/frequency characteristics and non-linearity distortion in transmitters for radiotelephony and sound broadcasting - Section Three