本规程规定了与ANSI/SMPTE 15M-1992中定义的l-in B型螺旋扫描录像机一起使用的视频和音频参考磁带。用于:显示再现系统主通道和同步通道的视频响应特性；调整视频再现系统的增益；视频记录系统的载波频率比较；验证控制轨道记录系统的电平和相位；调整节目音频再现系统的增益；音频再现系统的音频响应指示；比较音频记录系统的音频记录增益和频率响应特性；以及验证音频3记录中记录的时间码信息的级别和时间。

This practice specifies a video and audio reference tape to be used with l-in Type B helical-scan video tape recorders as defined in ANSI/SMPTE 15M-1992. It is to be used for: indication of video frequency response characteristics for both main and sync channels of the reproducing system; adjustment of gain of the video reproducing system; comparison of carrier frequencies of the video recording system; verification of level and phase of the control track recording system; adjustment of the gain of the program audio reproducing system; indication of the audio frequency response of the audio reproducing system; comparison of the audio recording gain and frequency response characteristics of the audio recording system; and verification of levels and timings of time code information recorded on audio 3 record.