非广播用录像机 测量方法 第3部分:用FM信号录音的声频特性

[中文适用范围]： 涉及整体特性的测量（幅度/频率响应、信噪比、动态范围、谐波失真、通道串扰、通道分离、AGC 操作和启动/恢复时间、开关噪声、哇音和颤振） [外文原描述]： Concerns the measurement of overall characteristics of the FM audio recorded using slanted tracks similar to those used for recording of the video information. The main characteristics of such a recording system are two channels high fidelity and the use of companders for noise reduction.