EN 60094-3:1996
(Main)Magnetic tape sound recording and reproducing systems - Part 3: Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape
Magnetic tape sound recording and reproducing systems - Part 3: Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape
Applies to recording and reproducing equipment for sound on magnetic tape (reel-to-reel, cassette and cartridge) for both professional and domestic applications. Lists and defines parameters affecting the performance of recording and reproducing equipment for sound on magnetic tape, and establishes conditions and agreed methods of measurement of these parameters.
Systeme für Tonaufzeichnung und -wiedergabe auf Magnetband - Teil 3: Meßverfahren zur Bestimmung der Eigenschaften von Aufnahme- und Wiedergabegeräten
Systèmes d'enregistrement et de lecture du son sur bandes magnétiques - Partie 3: Méthodes de mesure des caractéristiques des matériels d'enregistrement et de lecture du son sur bandes magnétiques
S'applique aux matériels d'enregistrement et de lecture du son sur bandes magnétiques (système à bobines, cassettes et cartouches) appartenant aux domaines professionnels et grand public. Enumère et définit les paramètres affectant les caractéristiques des matériels d'enregistrement et de lecture du son sur bande magnétique et établit les conditions de mesure et les méthodes de mesure agréées de ces paramètres.
Magnetic tape sound recording and reproducing systems -- Part 3: Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape (IEC 60094-3:1979 + A1:1980 + A2:1988)
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Magnetic tape sound recording and reproducing systems -- Part 3: Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape (IEC 60094-3:1979 + A1:1980 + A2:1988)Systeme für Tonaufzeichnung und -wiedergabe auf Magnetband -- Teil 3: Meßverfahren zur Bestimmung der Eigenschaften von Aufnahme- und WiedergabegerätenSystèmes d'enregistrement et de lecture du son sur bandes magnétiques -- Partie 3: Méthodes de mesure des caractéristiques des matériels d'enregistrement et de lecture du son sur bandes magnétiquesMagnetic tape sound recording and reproducing systems -- Part 3: Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape33.160.30Avdio sistemiAudio systemsICS:Ta slovenski standard je istoveten z:EN 60094-3:1996SIST EN 60094-3:1999en01-april-1999SIST EN 60094-3:1999SLOVENSKI
STANDARD
IEC•NORMECEIINTERNATIONALEIECINTERNATIONAL94-3STAN DARDPremière éditionFirst edition1979Systèmes d'enregistrement et de lecture du sonsur bandes magnétiquesTroisième partie:Méthodes de mesure des caractéristiques desmatériels d'enregistrement et de lecture du sonsur bandes magnétiquesMagnetic tape sound recording andreproducing systemsPart 3:Methods of measuring the characteristics ofrecording and reproducing equipment forsound on magnetic tape© CEI 1979 Droits de reproduction réservés —Copyright - all rights reservedAucune partie de cette publication ne peut être reproduite niNo part of this publication may be reproduced or utilizedutilisée sous quelque forme que ce soit et par aucun procédé,in any form or by any means, electronic or mechanical,électronique ou mécanique, y compris la photocopie et lesincluding photocopying and microfilm, without permissionmicrofilms, sans l'accord écrit de l'éditeur.in writing from the publisherBureau central de la Commission Electrotechnique Internationale 3, rue de Varembé Genève SuisseCommission Electrotechnique Internationale CODE PRIXInternational Electrotechnical Commission PRICE CODEMenHnyHapomiaR 3neerporexHH4ecnan HOMHCCHAPour prix, voir catalogue en vigueurFor price, see current catalogueTSIST EN 60094-3:1999
— 3 --CONTENTSPageFOREWORD 5PREFACE 5SECTION ONE — INTRODUCTIONClause1.Scope 92.Object 9SECTION Two — GENERAL NOTES ON MEASUREMENTS3.Information to be supplied by manufacturer of equipment94.Identification 95.Technical description 116.Mechanical characteristics117.Electrical characteristics138.Rated conditions139.Performance claims 17SECTION THREE — PRECAUTIONS TO BE TAKEN DURING MEASUREMENTS10.Conditions of measurement 23SECTION FOUR — METHODS OF MEASUREMENT11.Measurement of mechanical parameters2512.Measurement of electrical parameters33SIST EN 60094-3:1999
Document60A(Central Office)43Document60A(Central Office)47AustraliaAustriaBelgiumCanadaDenmarkEgyptFinlandFranceGermanyHungaryItalyJapanNetherlandsPortugalRomaniaSouth Africa(Republic of)XXXXxxxXxxXXXx5INTERNATIONAL ELECTROTECHNICAL COMMISSIONMAGNETIC TAPE SOUND RECORDING AND REPRODUCING SYSTEMSPart 3 : Methods of measuring the characteristics of recording and reproducingequipment for sound on magnetic tapeFOREWORD1)The formal decisions or agreements of the IEC 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 adoptthe text of the IEC recommendation for their national rules in so far as national conditions will permit. Any divergencebetween the I EC recommendation and the corresponding national rules should, as far as possible, be clearly indicatedin the latter.PREFACEThis standard has been prepared by Sub-Committee 60A, Sound Recording, of IEC Technical Committee No. 60,Recording.A first draft was discussed at the meeting held in Paris in 1975. As a result of this meeting, a draft, Document 60A(CentralOffice)43, was submitted to the National Committees for approval under the Six Months' Rule in July 1976.Amendments, Document 60A(Central Office)47, were submitted to the National Committees for approval under theTwo Months' Procedure in September 1977.The following countries voted explicitly in favour of publication:SIST EN 60094-3:1999
7Document60A(Central Office)43Document60A(Central Office)47SpainxxSwedenxxSwitzerlandxxTurkeyxxUnion of SovietSocialist RepublicsxxUnited KingdomxxUnited States of AmericaxxIEC Publication 94 and its supplements are under revision. The new IEC Publication 94 will be issued in severalparts, of which this Part 3 is one.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 (based on IEC Publication 94 [1968], Third edition).Part 2: Calibration tapesMinimum requirements for calibration tape for making adjustments and comparative assessments of the reproducingperformance (First edition 1975).Part 3: Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape (objectof this standard)Part 4: Mechanical magnetic tape propertiesCharacteristics to be specified and relevant methods of measurement. Equipment to be used to determine the mechanicalproperties 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 electricalproperties 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 IEC 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).Other IEC publications quoted in this standard:Publications Nos. 38:IEC Standard Voltages.65:Safety Requirements for Mains Operated Electronic and Related Apparatus for Householdand Similar General Use.263:Scales and Sizes for Plotting Frequency Characteristics and Polar Diagrams.268-1: Sound System Equipment, Part 1: General.268-3: Part 3: Sound System Amplifiers.268-15: Part 15: Preferred Matching Values for the Interconnection of Sound System Components.386:Method of Measurement of Speed Fluctuations in Sound Recording and ReproducingEquipment.651:Sound Level Meters.SIST EN 60094-3:1999
-9—MAGNETIC TAPE SOUND RECORDING AND REPRODUCING SYSTEMSPart 3 : Methods of measuring the characteristics of recording and reproducingequipment for sound on magnetic tapeSECTION ONE — INTRODUCTION1.ScopeThis standard applies to recording and reproducing equipment for sound on magnetic tape(reel-to-reel, cassette and cartridge) for both professional and domestic applications, and will bereferred to as "equipment" throughout this standard.This standard does not apply to special purpose equipment such as high speed duplicators,artificial reverberation recorders or dictation machines not employing the reel-to-reel, cassette orcartridge principle. This standard excludes all aspects of safety, which are to be found in I E CPublication 65, Safety Requirements for Mains Operated Electronic and Related Apparatus forHousehold and Similar General Use. It also excludes magnetic tape properties, which are to befound in IEC Publications 94-4 and 94-5 (in preparation).2.ObjectThe object of this standard is to list and define parameters affecting the performance of recordingand reproducing equipment for sound on magnetic tape, and to establish conditions and agreedmethods of measurement of these parameters.SECTION TWO — GENERAL NOTES ON MEASUREMENTS3.Information to be supplied by manufacturer of equipmentThe information required is listed in this section. It falls into two distinct categories:—mandatory information to be clearly shown on the equipment, indicated by an "A" on theright-hand side of the page;—optional information to be given separately, e.g. in an instruction manual relating to and suppliedwith the equipment.It is essential that mandatory information outside the scope of this standard (e.g. aspects ofsafety — IEC Publication 65) shall also be given in the correct location.4. IdentificationName of manufacturer or supplierCountry of manufactureModel or type number (variants, if any, to be stated)AASIST EN 60094-3:1999
— 11 —5.Technical descriptionAll parameters in this clause are subject to verification only. For the purpose of this clause, an"adjustable" control shall be deemed to be one that is readily accessible to the user when the equip-ment is in its intended use. Its adjustment shall necessitate neither relocation of the equipment northe dismantling of any of its parts.6.Mechanical characteristics6.1 Space and support requirements during operation of equipmentCharacteristicsUnitsMinimum heightmmMinimum widthmmMinimum depthmmOperating positionhorizontal, vertical or otherTotal masskg6.2 Tape carrier and tapeUnitsType of tape carrier (e.g. cassette, cartridgeor reel-to-reel)Type of reel (e.g. Type II)Maximum reel diameter without overhangmmMaximum reel diameter with overhangmmTape widthmm6.3 Tape transport systemUnitRated speed(s)cm/sANote. — On multispeed equipment, the speeds may be marked with the first two digits of the rated speed, e.g. therated speed of 9.53 cm/s may be shown as "9.5". For single-speed cassette and cartridge equipment, thespeed need not be marked on the equipment but shall be stated in the instruction manual.Adjustable tape speed on:Record/reproduce.Fast forward.Rewind.Adjustable tape tension:Between capstans.On supply reel.On take-up reel.Number of motors.Type of capstan (e.g. single or multiple capstan).Reversible tape drive (record/reproduce).Type of capstan drive motor(s).SIST EN 60094-3:1999
— 13 —Special facilities:Automatic stop.Automatic reverse.Remote start.Remote stop.Cueing/Pause device.Remote fast forward.Remote fast reverse.Adjustable tape path.Capstan drive motor(s) synchronizable to electric power supply frequency.6.4 Tape headsCombined or separate erase/record/reproduce heads.Combined or separate bias heads.Adjustable azimuth.Adjustable zenith.Adjustable track alignment.Number of tracks.Maximum number of tracks on intended tape width.Magnetic head material.7.Electrical characteristics7.1 Reproducing dataMaximum number of simultaneous reproducing channels.Number of reproducing channels.Reproducing characteristic(s) (e.g. I E C).Adjustable gain.Adjustable balance.Adjustable equalization.Type of noise reduction system.Automatic gain control.7.2 Recording dataMaximum number of simultaneous recording channels.Number of recording channels.Adjustable gain.Adjustable balance.Adjustable equalization.Type of noise reduction system.Automatic gain control.Adjustable bias current.8.Rated conditionsFor convenience in specifying how tape recorders are to be set up for measurement or verification,it is necessary to define certain rated conditions under which measurements shall be made. Further-more, some of these rated conditions must be related to a specified calibration or reference tape.SIST EN 60094-3:1999
— 15 —The following ratings are basic to the methods of measurement specified in this standard:Rated environmental conditions.Rated power supply.Rated recording level.Rated load impedance.Rated source impedance.Rated input electromotive force (e.m.f.).Rated output voltage.Rated bias setting.To obtain the correct conditions for measurement, the above-mentioned ratings shall be takenfrom the manufacturer's specification. These ratings themselves are not subject to measurement butthey constitute the basis for measuring the other characteristics.In order to achieve maximum interchangeability of equipment from different manufacturers, andin order to simplify the work of testing authorities, it is desirable that rated conditions should bestandardized so far as is possible.For the guidance of equipment manufacturers, preferred values or ranges are given in squarebrackets following each parameter.8.1 Rated environmental conditionsUnitsAmbient temperature20 +15 °CRelative humidity60 ± 15Air pressure 000 ± 10 000 PaMinimum stabilization time of equipment atambient temperature.8.2 Rated power supplyUnitsType of supply(ies) (e.g. a.c.)Agsee IECVolta e sAPublication 38* V Frequency(ies)HzA8.3 Interface dataSpecified calibration tape.Specified reference tape.Manufacturer and identification details of tape housing(cassette and cartridge equipment only).Rated bias setting for specified reference tape.* IEC Standard Voltages.SIST EN 60094-3:1999
— 17 —UnitsRated load impedance(s) R.*S2Rated recording leveldBThe recording level specified by the manufacturer:The level shall be specified in decibels above or below thelevel of the level section of the specified calibration tapedBRated output voltage(s) Uo*VThe r.m.s. output voltage across the rated load impedancewhen reproducing a tape recorded at the rated recordinglevel. This parameter specifies the setting of adjustablereproduce gain controls.Rated source impedance(s) Ri*S2Rated source e.m.f.(s) Ui*mVThe r.m.s. source electromotive force in series with the ratedsource impedance which, when recording at the rated biassetting on the specific reference tape, produces a magnetic.flux identical to the rated recording level.This parameter specifies the setting of adjustable record gaincontrols.9. Performance claimsThe performance claimed shall be based on the equipment operating under the rated conditionsspecified in Clause 8. Unless otherwise specified in Sub-clauses 9.1 or 9.2 (for example maximum orminimum values), a tolerance shall be allocated to each parameter.If a manufacturer claims rated power supply voltage tolerances exceeding ±10%, then the charac-teristics to be specified shall also be stated for the upper and lower limits of these tolerances.If variations in frequency of the rated power supply, within tolerances specified by the manu
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