American National Standard for Video Recording–¾-in Type E Helical Scan–Small Video Cassette
SMPTE Journal · 1983
Scope the dimensions of a video 3h-in Type E helical-scan cassette system, operating mm/s (3.75 ids).ce Standard n National Standard is inonjunction with this stand-, Dimensions and Location 44n Type E Helical-Scan ette Recording m Planes the plane determined by 5. 3.2Datum Plane B is the plane that includes the center of Datum Holes (a) and (b) and is orthogonal to Datum Plane A. Datum Holes (a) and (b) are specified in Fig. 2. 3.3Datum Plane C includes Datum Hole (a) and is orthogonal to both Datum Planes A and B.