本标准规定了1/2英寸M-2型螺旋扫描录像机的视频、音频、时间和控制代码以及跟踪控制信号的记录系统，该录像机使用的视频信号具有525行、59.94场/秒、2:1交错的典型扫描结构，并使用ANSI/SMPTE 250M中规定的录像带。本标准中所示的音频调制（AFM）记录是可选的。ANSI/SMPTE 249M中定义的互换性有限的脉冲编码调制（PCM）音频记录模式是ANSI/SMPTE 252M中规定的二次音频记录模式。

This standard specifies the recording system for the video, audio, time and control code, and tracking control signals for 1/2-in type M-2 helical-scan video tape recorders operating with video signals having a typical scanning structure of 525 lines, 59.94 fields/s, 2:1 interlace, and utilizing the video cassettes specified in ANSI/SMPTE 250M.The audio frequency modulation (AFM) recording shown in this standard is optional. Pulse code modulation (PCM) audio recording mode with limited interchangeability, as defined in ANSI/SMPTE 249M, is a secondary audio recording mode which is specified in ANSI/SMPTE 252M.