StandardDetails

This International Standard specifies basic technical characteristics for magnetic sound test films used for checking, adjusting and measuring 70 mm motionpicture projector sound systems and sound reproduction channels of motion-picture installations. This International Standard includes specifications for test films intended for checking, adjusting and measuring of: a) azimuth of the magnetic head gaps (azimuth alignment test film; see table 1); b) output level balance of several motion-picture projectors or systems and interchannel balance on each projector or system (signal level test film; see table 2); c) frequency response of the sound reproduction channels (multi-frequency test film; see tables 3 and 4); d) non-uniformity in velocity of film travel (flutter) (flutter test film; see table 5).