1.1本国际标准规定了国际交换的基本技术特性 用于检查、调整和测量电影放映机的模拟照相声音测试胶片 单声道或立体声电影装置的音响系统和声音再现通道 复制。 1.2本国际标准规定了在35毫米和 16毫米电影胶片。 1.3本国际标准包括用于检查、调整和测量 a)扫描光束的聚焦和方位角， b)扫描光束宽度及其相对于膜的参考边缘的位置， c)扫描光束照射的均匀性， d)若干电影放映机的电平输出平衡， e)声音再现通道的频率响应，以及 f)薄膜行进的不均匀性。

1.1 This International Standard specifies basic technical characteristics for the international exchange of analogue photographic sound test films intended for checking, adjusting and measuring motion-picture projector sound systems and sound reproducing channels of motion-picture installations for monophonic or stereophonic reproduction. 1.2 This International Standard specifies types and technical characteristics of test films made on 35 mm and 16 mm motion-picture films. 1.3 This International Standard includes test films intended for the checking, adjusting and measuring of a) focusing and azimuth of the scanning beam, b) scanning beam width and its position relative to the reference edge of the film, c) uniformity of the scanning beam illumination, d) level output balance of several motion-picture projectors, e) frequency response of the sound reproduction channel, and f) non-uniformity of film travel.