标准摘要
[中文适用范围]： 包含由于应用不同的测量方法和条件而获得不可靠或模糊结果的参数的所选测量方法的详细信息。适用于全调幅发射机 [外文原描述]： Applies to all transmitters for A3 class of operation. Applies also to radiotelephony transmitters with 1, 2, 3 or 4 channels for A3A, A3B, A3H and A3J class of operation, and to frequency modulated transmitters for monophonic sound broadcasting. Applies in part to transmitters for A7A and A7B class of operation. IEC 60244-4 itself describes standard operating conditions, standard modulation input arrangements and frequencies (Section One). It also describes standard methods to be used for measuring input impedance, the amplitude/frequency characteristics and the intelligible crosstalk (Section Two).
英文名称Methods of measurement for radio transmitters. Part 4: Amplitude/frequency characteristics and non-linearity distortion in transmitters for radiotelephony and sound broadcasting