Requirements for Recording American National Standard Time and Control Code for 1-in Type B Helical-Scan Video Tape Recorders
1英寸B型螺旋扫描录像机记录美国国家标准时间和控制代码的要求
This practice specifies the recorded signal and the conditions for recording the time and control code on 1-in type B helical-scan video tape recorders as specified in SMPTE 12M.