本规程规定了交换525/60单色或NTSC彩色系统的1英寸C型螺旋扫描电视磁带记录所必需的记录信息参数。参数包括视频预相位特性、记录的载波频率和记录的电流频率响应。

This practice specifies parameters of the recorded information essential to the interchange of 1-in type C helical-scan television tape recordings of the 525/60 monochrome or NTSC color systems. The parameters include video preemphasis characteristics, recorded carrier frequencies, and record-current frequency response.