SIST EN 60094-1:1999

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Magnetic tape sound recording and reproducing systems -- Part 1: General conditions and requirements (IEC 60094-1:1981)Systeme für Tonaufzeichnung und -wiedergabe auf Magnetband -- Teil 1: Allgemeine Bedingungen und AnforderungenSystèmes d'enregistrement et de lecture du son sur bandes magnétiques -- Partie 1: Conditions générales et spécificationsMagnetic tape sound recording and reproducing systems -- Part 1: General conditions and requirements33.160.30Avdio sistemiAudio systemsICS:Ta slovenski standard je istoveten z:EN 60094-1:1993SIST EN 60094-1:1999en01-april-1999SIST EN 60094-1:1999SLOVENSKI
STANDARD



SIST EN 60094-1:1999



SIST EN 60094-1:1999



SIST EN 60094-1:1999



SIST EN 60094-1:1999



SIST EN 60094-1:1999



NORMEINTERNATIONALEINTERNATIONALSTANDARDCEIIEC94-1Quatrième éditionFourth edition1981Systèmes d'enregistrement et de lecturedu son sur bandes magnétiquesPremière partie:Conditions générales et spécificationsMagnetic tape sound recordingand reproducing systemsPart 1:General conditions and requirements© CEI 1981 Droits de reproduction réservés — Copyright — all rights reservedAucune partie de cette publication ne peut être reproduite niutilisée sous quelque forme que ce soit et par aucun pro-cédé, électronique ou mécanique, y compris la photocopie etles microfilms, sans l'accord écrit de l'éditeur.No part of this publication may be reproduced or utilized inany form or by any means, electronic or mechanical,including photocopying and microfilm, without permissionin writing from the publisher.Bureau Central de la Commission Electrotechnique Internationale 3, rue de Varembé Genève, SuisseCommission Electrotechnique InternationaleInternational Electrotechnical CommissionMenulyHapoaHaa 3neKrporexHK4ecnaa KoMHCCHa•CODE PRIXPRICE CODEPour prix, voir catalogue en vigueurFor price, see current catalogueIEC•SSIST EN 60094-1:1999



- 3 -CONTENTSPageFOREWORD 5PREFACE 5SECTION ONE — GENERALClause1.Scope 2.Definitions 93.Units and symbols 94.Drawing office practice 95.Scales for graphical presentation of data 116.Mechanical and electrical matching requirements
117.High fidelity equipment and systems
138.Flammability 13SECTION TWO — MECHANICAL REQUIREMENTS9.Tape dimensions
1310.Tape speed
1511.Direction of tape winding . 1512.Mechanical requirements and dimensions of recording systems according to tape carrier1713.Designation of magnetic tracks 1714.Allocation and dimensions of magnetic tracks according to tape carrier
17SECTION THREE — ELECTRICAL REQUIREMENTS15.Amplitude/frequency response of the recorded short-circuit flux 1716.Reproducing electrical amplitude/frequency response 1917.Tolerances on recording and reproducing system characteristics 19SECTION FOUR — TAPE AND PROGRAMME IDENTIFICATION18.Identification of tape sides 2119.Programme identification
2120.Colour of leader tapes, reel-to-reel systems 25APPENDIX A - Explanation of the drawing system used in the different parts of I EC Publica-tion 94 33SIST EN 60094-1:1999



- 5 -INTERNATIONAL ELECTROTECHNICAL COMMISSIONMAGNETIC TAPE SOUND RECORDING AND REPRODUCINGSYSTEMSPart 1: General conditions and requirementsFOREWORD1)The formal decisions or agreements of the I EC on technical matters, prepared by Technical Committees on which all theNational Committees having a special interest therein are represented, express, as nearly as possible, an internationalconsensus of opinion on the subjects dealt with.2)They have the form of recommendations for international use and they are accepted by the National Committees in thatsense.3)In order to promote international unification, the I EC expresses the wish that all National Committees should adopt thetext of the I EC recommendation for their national rules in so far as national conditions will permit. Any divergencebetween the IEC recommendation and the corresponding national rules should, as far as possible, be clearly indicated inthe latter.4)The IEC has not laid down any procedure concerning marking as an indication of approval and has no responsibilitywhen an item of equipment is declared to comply with one of its recommendations.PREFACEThis standard has been prepared by Sub-Committee 60A: Sound Recording, of I EC Technical Committee No. 60:Recording.This standard should be read in conjunction with IEC Publication 38: Standard Voltages, IEC Publication 65: SafetyRequirements for Mains Operated Electronic and Related Apparatus for Household and Similar General Use, I EC Publi-cation 268-1: Sound System Equipment, Part 1: General, IEC Publication 268-3: Sound System Equipment, Part 3: SoundSystem Amplifiers, IEC Publication 386: Method of Measurement of Speed Fluctuations in Sound Recording and Repro-ducing Equipment and IEC Publication 651: Sound Level Meters.A first draft was discussed at the meeting held in Ottawa in 1976. A draft, Document 60A(Central Office)54, was sub-mitted to the National Committees for approval under the Six Months' Rule in April 1979.The National Committees of the following countries voted explicitly in favour of publication:AustraliaGermanySwedenAustriaHungaryTurkeyBelgiumKorea (Republic of)Union of SovietCanadaNetherlandsSocialist RepublicsEgyptSouth Africa (Republic of)United KingdomFranceSpainThe Japanese vote was positive except for the speed tolerances given in Clause 10, which the Japanese National Com-mittee considers to be too severe for domestic cassette/cartridge equipment.I EC Publication 94 and its supplements are under revision. The new IEC Publication 94 will be issued in several parts, ofwhich this is Part 1.It will have the following parts:Part 1: General conditions and requirementsGeneral: electrical requirements for the magnetic tape recording and reproducing systems; mechanical requirements forthe magnetic tape; tape identification; programme identification (object of this standard).Part 2: Calibration tapesMinimum requirements for calibration tapes for making adjustments and comparative assessments of the reproducingperformance (First edition 1975).SIST EN 60094-1:1999



- 7 -Part 3: Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape (First edi-tion 1979)Part 4: Mechanical magnetic tape propertiesCharacteristics to be specified and relevant methods of measurement. Equipment to be used to determine the mechan-ical properties of magnetic tapes (in preparation).Part 5: Electrical magnetic tape propertiesCharacteristics to be specified, methods of measurement and equipment to be used for the determination of the elec-trical properties of magnetic tape for analogue sound recording and reproduction (in preparation).Part 6: Reel-to-reel systemsMechanical requirements and dimensions, including reels, hubs and relevant track allocations (in preparation).Part 7: Cassette for commercial tape records and domestic useMechanical requirements and dimensions, including track allocation (in preparation, based on I EC Publication 94A,First edition 1972).Part 8: Eight-track magnetic tape cartridge for commercial tape records and domestic useMechanical requirements and dimensions, including track allocation (in preparation, based on IEC Publication 94B,First edition 1974).Part 9: Magnetic tape cartridge for professional useMechanical requirements and dimensions, including track allocation (in preparation).This standard being divided into different parts, the particular requirements for the different recording systems on specifictape carriers contained in Parts 6 to 9 have to be used with Part 1: General conditions and requirements.The clauses of these particular requirements supplement or modify the corresponding clauses in Part 1.Where there is no corresponding clause or sub-clause in the particular requirements, the clause or sub-clause of Part 1applies without modification as far as is reasonable. Where the text of the particular requirement states "addition", "modifi-cation" or "replacement", the relevant requirement of Part 1 should be adapted accordingly.This standard applies only when there is a specific part containing particular requirements concerning a recording system.Individual countries however, may wish to consider its application, so far as is reasonable, to systems designed on basicallynew principles and for which no specific requirements have been determined up till now.Other 1 EC publications quoted in this standard:Publications Nos: 27:.Letter Symbols to be Used in Electrical Technology.50:International Electrotechnical VocabularyChapter 801: Electro-acoustics (in preparation).Chapter 806: Recording and Reproduction of Sound and Video.117:Recommended Graphical Symbols; Graphical Symbols.263:Scales and Sizes for Plotting Frequency Characteristics and Polar Diagrams.268-2:Sound System Equipment, Part 2: Explanation of General Terms.268-12:Part 12: Circular Connectors for Broadcast and Similar Use.268-14A: First Supplement to Publication 268-14, Part 14: Mechnical Design Features, Chapter II:Connecting Devices, Section One: Circular Connectors for the Interconnection ofSound System Components.268-15:Part 15: Preferred Matching Values for the Interconnection of Sound System Compo-nents.581-4:High Fidelity Audio Equipment and Systems: Minimum Performance Requirements,Part 4: Magnetic Recording and Reproducing Equipment.SIST EN 60094-1:1999



- 9 -MAGNETIC TAPE SOUND RECORDING AND REPRODUCINGSYSTEMSPart 1: General conditions and requirementsSECTION ONE - GENERAL1.ScopeThis standard applies to the dimensional, mechanical and electrical requirements for non-perforated blank and pre-recorded magnetic tape and for the associated recording and repro-ducing systems such as reel-to-reel, cassette and cartridge. The methods of measurements andthe necessary tolerances to secure interchangeability of recordings are included.2.Definitions2.1 Terms related to audio recording and reproducingReference is made to I EC Publication 50: International Electrotechnical Vocabulary,Chapter 806: Recording and Reproduction of Sound and Video.2.2 Terms related to audio-engineering, sound systems and equipmentReference is made to IEC Publication 50: International Electrotechnical Vocabulary,Chapter 801: Electro-acoustics (in preparation), Chapter 806: Recording and Reproductionof Sound and Video, and IEC Publication 268-2: Sound Systems, Part 2: Explanation ofGeneral Terms.3.Units and symbolsThe letter symbols for quantities and units in accordance with IEC Publication 27: LetterSymbols to be Used in Electrical Technology.4.Drawing office practiceThe drawings given in the various parts of IEC Publication 94 are drawn in accordancewith IEC and ISO standards. Some of the important publications are:-ISO/370 (1975):Toleranced Dimensions - Conversion from Inches into Millimetresand Vice Versa.-ISO/R 406 (1964):Inscription of Linear and Angular Tolerances.-ISO/R 1101/1 (1969)*: Technical Drawings - Tolerances of Form and of Position. Part I:Generalities, Symbols, Indications on Drawings.* Under revisionSIST EN 60094-1:1999



-ISO 1101/2 (1974):Technical Drawings - Tolerances of Form and of Position. Part II:Maximum Material Principle.-ISO/R 1660 (1971): Technical Drawings - Tolerances of Form and of Position. Part III:Dimensioning and Tolerancing of Profiles.-ISO/R 1661 (1971):Technical Drawings - Tolerances of Form and of Position. Part IV:Practical Examples of Indications on Drawings.-IEC Publication 117: Recommended Graphical Symbols; Graphical Symbols.Those elements not listed in IEC Publication 117 shall be clearlyexplained.An explanation of the drawing system used in the different parts of this publication is to befound in Appendix A.5.Scales for graphical presentation of data5.1 GeneralLinear or logarithmic scales are recommended for graphical presentation. Linear decibelscales are equivalent to logarithmic scales. Other kinds of scales, such as double logarithmic,shall be avoided. When using decibel scales, the zero reference should, if possible, be the ratedvalue. In those cases, where each of the scales refers directly to physical units, it is recom-mended to avoid a combination of linear and logarithmic scales.Where quantities represented by abscissae and ordinates are of the same kind, it is recom-mended that the same unit length be used for both.Linear scales with remote zero point should be avoided as far as possible.For further information see I EC Publication 263: Scales and Sizes for Plotting FrequencyCharacteristics and Polar Diagrams.5.2 Scales for frequency characteristicsGraphs shall be drawn with frequency in hertz as abscissae on a logarithmic scale, and levelin decibels as ordinates on a linear scale. The scale ratio shall be such that the length repre-senting one decade of frequency is the same as the length representing 25 dB or 50 dB differ-ence in level. The preferred length per decade is 50 mm.If the size of the graph is changed, the scale ratio should be left unaltered.6.Mechanical and electrical matching requirements6.1 For the connectors used, reference is made to IEC Publication 268-12: Part 12: Circular Con-nectors for Broadcast and Similar Use; and IEC Publication 268-14A: First Supplement toPublication 268-14: Part 14: Mechanical Design Features, Chapter II: Connecting Devices,Section One: Circular Connectors for the Interconnection of Sound System Components.SIST EN 60094-1:1999



- 13 -6.2 For the preferred matching values, reference is made to I EC Publication 268-15: Part 15: Pre-ferred Matching Values for the Interconnection of Sound System Components.7.High fidelity equipment and systemsFor minimum electrical requirements for high fidelity equipment and systems reference ismade to IEC Publication 581-4: High Fidelity Audio Equipment and Systems: MinimumPerformance Requirements. Part 4: Magnetic Recording and Reproducing Equipment.8.FlammabilityWhen applicable, magnetic tapes shall comply with the flammability regulations formotion picture film as laid down in ISO Standard 543 (1974): Cinematography - Motion-pic-ture Safety Film - Definition, Testing and Marking.SECTION TWO - MECHANICAL REQUIREMENTS9.Tape dimensionsThe dimensions shall be as follows:Tape widthTape thicknessoo50.80-0.06 mm (2.000-0.0024 in)oo25.40-0.06 mm (1.000-0.0024 in)oo0.055 mm max. (0.0022 in max.)12.70-0.06 mm (0.500-0.0024 in)oo6.30-0.06 mm (0.248-0.0024 in)oo3.81-0.05 mm (0.150-0.002 in)0.020 mm max. (0.0008 in max.)SIST EN 60094-1:1999



- 15 -10. Tape speedThe rated speed during reproduction shall be in a geometrical progression with the divisor 2commencing at 76.2 cm/s (30 in/s). The speed and tolerances apply to machines operatingfrom supplies having frequencies and voltages as specified by the manufacturer.The rated tape speeds and relative characteristics are as follows:UseTape carrierRated speedToleranceson speedWow andflutterRelativeEC. part of IEPublication 94cm/sin/s76.230±0.2%40.1%Reel-to-reel38.115±0.2%40.1%.6Professional19.05772±0.2%40.15%Cartridge19.057'/2±0.2%40.15%919.05772±2%40.2%Reel-to-reel9.5333/4±2%40.3%64.76l'/s±2%40.5%DomesticCartridge9.5333/4±2%Under8Cassette4.7617/s+2consideration7When reproducing a commercial tape record at rated speed, any reproduced frequencyshall be within the following tolerances:Tape carrierRated speedTolerances onreproducedfrequencyWow andflutterRelative part of IECPublication 94 cm/sin/s19.0571/2±0.5°%040.2%Reel-to-reel9.5333/4±0.5%40.3%64.7617/s±0.5%40.5%Cartridge9.5333/4±0.5%40.3%8Cassette4.7617/s±0.5%40.5%711. Direction of tape winding11.1 Reel-to-reelIf the top surface of a spool is distinguished by markings, by a label or because of an asym-metrical construction, then the tape shall be wound in such a way that during reproduction itmay be unwound in an anti-clockwise direction.11.1.1 For professional programme exchangeThe magnetic coating should preferably face the centre of the reel.SIST EN 60094-1:1999



- 17 -11.1.2 For commercial tape records and domestic useThe magnetic coating shall face the centre of the reel.11.2 Cassette/cartridgeThe magnetic coating shall face the openings at the front of the cassette/cartridge.12.Mechanical requirements and dimensions of recording systems according to tape carrierSee Parts 6 to 9 of I EC Publication 94.13.Designation of magnetic tracksUnder normal operation, the designation of magnetic tracks is as follows:If the tape moves from left to ri
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