09~2h2h 4851903 0031816 (ISO 4242 International Standard --2325 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEXAYHAPOAHAR OPrAHW3ALWR HO CTAHAAPTW3AMWGORGANISATION INTERNATIONALE DE NORMALISATION Cinematography - Recording head gaps for two sound records on 16 mm magnetic film - Positions and width dimensions Cinematographie -- Entrefers de tetes d'enregistrement pour enregistrement du son sur deux pistes sur film magnetique de 16 mm -- Emplacement et largeur First edition - 1980-07-01 UDC 681.84.083.82 : 778.534.4 Ref. No. ISO 4242-1980 (E) Descriptors : cinematography, motion picture film 16 mm, magnetic recording, sound recording, sound track, magnetic heads, dimensions, positioning, specifications. ionfor Standardization Price based on 2 pages Not for Resale or networking permitted without license from IHS 0-2h2h 2TOTEOO EO6TSOH Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards institutes (Iso member bodies). The work of developing. Inter- national Standards is carried out through IsO technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with Iso, also take part in the work. 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. International Standard ISO 4242 was developed by Technical Committee ISO/TC 36, Cinematography, and was circulated to the member bodies in May 1979. Austria Italy Sweden United Kingdom Belgium Japan Canada Libyan Arab Jamahiriya : USA Mexico USSR Czechoslovakia Denmark Poland Yugoslavia France South Africa, Rep. of Spain Germany, F. R. No member body expressed disapproval of the document. This International Standard cancels and replaces iso Recommendations R 890-1968 and R 891-1968, of which it constitutes a technical revision. @ International Organization for Standardization, 1980 Printed in Switzerland from IHS Not for Resale 4851903 0031818 ISO 4242-1980 (E) INTERNATIONAL STANDARD 0~2h2h Cinematography -- Recording head gaps for two sound records on 16 mm magnetic film - Positions and width dimensions 1 Scope and field of application 5 Velocity This International Standard specifies the lateral positions and 5.1The sound records are intended for use at velocities of width dimensions of the recording heads for two magnetic 24 perforations (approximately 18,3 cm or 7.2 in) per second or sound records and a control track on 16 mm single perforated at 25 perforations (approximately 19,05 cm or 7.5 in) per magnetic recording film. second. It also specifies the reproducing velocity of the film travel. 5.2 The tolerances given in 1s0 1188 (clause 3) permit a choice of operating conditions such that the recorded References characteristic conforms to 1so 1188 even though the recording 2 is intendedforeither24or25perforationspersecond,andthe reproduction is conducted at the other velocity. Iso 69, Cinematography - 16 mm motion-picture raw stock film -- Cutting and perforating dimensions. Iso 1188, Cinematography - Recording characteristics for magnetic sound record on 16 mm motion-picture film - 6 Track usage Specifications. 6.1 The centre track position shall preferably be used for 3 Location and width of magnetic head single records. However, for international exchange, inter- changeability is facilitated by placing identical information on gaps both tracks. 3.1 The width dimensions and lateral positions of the magnetic head gaps shall be as shown in the figure and given in 6.2 For recording stereo programmes, the centre track the table. position shall be used for the left-hand channel. 3.2 The magnetic head gaps shall be physically in line at an angle of 90o ± 5' to the direction of film travel. 6.3 For recording two languages