ISO 9525 INTERNATIONAL STANDARD First edition 1988-08-01 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEXKAYHAPOAHAA OPTAHM3ALMA NO CTAHAAPTM3ALMM Cinematography -- Recording head gaps for two sound records on 17,5 mm magnetic film - Positions and width dimensions Cinematographie -- Entrefers des tetes magnetiques pour I'enregistrement de deux pistes sonores sur film magnetique de 17,5 mm - Position et largeur Reference number ISO 9525 : 1988:(E) itted without license from IHS Not for Resale ISO 9525 : 1988 (E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through IsO technical committees. Each member mental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with iSO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 9525 was prepared by Technical Committee ISO/TC 36, Cinematography. International Organization for Standardization, 1988 Printed in Switzerland Copyright International Organization for Standardization Not for Resale d without license from IHS INTERNATIONAL STANDARD ISO 9525 : 1988 (E) Cinematography Recording head gaps for two sound records on 17,5 mm magnetic film - Positions and width dimensions 1 Scope Recorded characteristic This International Standard specifies the lateral positions and The recorded characteristic shall be in accordance with ISO 1189. width dimensions of the recording heads for two magnetic sound records and a control track on 17,5 mm single perforated magnetic recording film. 5 Velocity It also specifies the reproducing velocity of the film travel. 5.1 The sound records are intended for use at velocities of 24 frames (approximately 45,6 cm or 18 in) per second, or at 25 frames (approximately 47,5 cm or 18,7 in) per second. Normative reference 2 5.2 The tolerances given in ISO 1189 permit a choice of The following standard contains provisions which, through operating conditions such that the recorded characteristic con- reference in this text, constitute provisions of this international forms to Iso 1189 even though the recording is intended fol Standard. At the time of publication, the edition indicated was either 24 or 25 frames per second, and the reproduction is con- valid. All standards are subject to revision, and parties to ducted at the other velocity. agreements based on this international Standard are encouraged to investigate the possibility of applying the most recent edition of the standard listed below. Members of IEC and ISO maintain Track usage 6 registers of currently valid International Standards. 6.1 The two tracks specified in this International Standard IsO 1189 : 1986, Cinematography - -- Recorded characteristic may be used for either related or unrelated material. for magnetic sound records on 35 mm motion-picture film ex- cluding striped release prints -- Specifications. 6.2 When used for two-channel stereophonic programme material, track 1 shall be used for the left (as viewed from the auditorium) loudspeaker channel. Track 2 shall be used for the 3 Location and width of magnetic head gaps right (as viewed from the auditorium) loudspeaker channel. 3.1 The width dimensions and lateral positions of the 6.3 The control track shall be used for recording other infor- magnetic head gaps shall be as shown on figure 1 and given in mation and for address systems in analogue or digital form. table 1. NOTE -- It is recommended that the container and