1、BRITISH STANDARD BS EN 61119-3:1994 IEC1119-3: 1992 Digital audio tape cassette system (DAT) Part3: DAT tape properties The European Standard EN61119-3:1994 has the status of a British Standard UDC621.396.7:681.84.083.84BSEN61119-3:1994 This British Standard, having been prepared under the direction
2、of the ElectrotechnicalSector Board,was published under theauthority of the StandardsBoard and comesintoeffect on 15December1994 BSI11-1999 The following BSI references relate to the work on this standard: Committee reference EEL/22 Draft for comment88/30302DC ISBN 0 580 23529 7 Cooperating organiza
3、tions The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the national committees of the following countries: Austria Italy Belgium Luxembourg Denmark Netherlands Finland Norway France Portugal Germany Spain Gr
4、eece Sweden Iceland Switzerland Ireland United Kingdom Amendments issued since publication Amd. No. Date CommentsBSEN61119-3:1994 BSI 11-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN61119-3 3 National annex NA (informative) Committees re
5、sponsible Inside back cover National annex NB (informative) Cross-references Inside back coverBSEN61119-3:1994 ii BSI 11-1999 National foreword This British Standard has been prepared under the direction of the Electrotechnical Sector Board and is the English language version of EN61119-3:1994 Digit
6、al audio tape cassette system (DAT) Part3: DAT tape properties, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC1119-3:1992, published by the International Electrotechnical Commission (IEC). BS EN61119 consists of the following Parts: Part1
7、: Dimensions and characteristics; Part2: DAT calibration tape; Part3: DAT tape properties; Part4: Character pack format 1) ; Part5: DAT for professional use 1) ; Part6: Serial copy management system; Part7: DAT logo application rule 1) . A British Standard does not purport to include all the necessa
8、ry provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, the EN tit
9、le page, pages2 to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. 1) In preparation.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN611
10、19-3 July1994 UDC 621.396.7:681.84.083.84 Descriptors: Sound recording, digital recording, data recording devices, audio cassettes, magnetic tapes, standard measure, characteristics, electrical properties, mechanical properties English version Digital audio tape cassette system (DAT) Part3: DAT tape
11、 properties (IEC1119-3:1992) Systme audionumrique cassette (DAT) Partie3: Proprits des bandes (CEI1119-3:1992) Digitales Tonband-Kassetten-System Teil3: DAT-Bandeigenschaften (IEC1119-3:1992) This European Standard was approved by CENELEC on1994-05-15. CENELEC members are bound to comply with the CE
12、N/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to
13、 any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official
14、versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical St
15、andardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1994 Copyright reserved to CENELEC members Ref. No. EN61119-3:1994 EEN61119-3:1994 BSI 11-1999 2 Foreword The CENELEC questionnaire
16、procedure, performed for finding out whether or not the International Standard IEC1119-3:1992 could be accepted without textual changes, has shown that no common modifications were necessary for the acceptance as a European Standard. The reference document was submitted to CENELEC members for formal
17、 vote and was approved by CENELEC as EN61119-3 on15May1994. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given only for information. In this standard, Annex A is informative and Annex ZA is normative. Conten
18、ts Page Foreword 2 1 Scope and object 3 2 Normative references 3 3 Definitions (under consideration) 3 4 Technical requirements and test conditions 3 4.1 Standard atmospheric conditions for testing 3 4.2 Mechanical characteristics of test equipment 3 4.3 Electrical characteristics of test equipment
19、3 4.4 Calibration tape 3 4.5 Reference tape 3 4.6 Condition of the tape to be tested 3 5 Electrical parameters to be measured 3 5.1 RF optimum recording current 3 5.2 RF output level 4 5.3 RF frequency response 4 5.4 Overwrite characteristics 4 5.5 Carrier-to-noise ratio (C/N) 4 6 Mechanical and oth
20、er parameters to be tested 4 6.1 Tape width 4 6.2 Tape width fluctuation 4 6.3 Total tape thickness 4 6.4 Yield force (F3) 4 6.5 Residual elongation 4 6.6 Light transmittance 5 6.7 Electrical resistance of magnetic coating 5 Annex A (informative) Reference tape 6 Annex ZA (normative) Other publicati
21、ons quoted in this standard with the references of the relevant European publications 6 Table 1 DAT reference tape 3 latest date of publication ofan identical national standard (dop)1995-03-15 latest date of withdrawal ofconflicting national standards (dow)1995-03-15EN61119-3:1994 BSI 11-1999 3 1 Sc
22、ope and object This part of IEC1119 applies to the properties of magnetic tapes used in the DAT cassette system. The purpose of this part is to specify the measurement methods and the minimum requirements applicable to these tapes. 2 Normative references The following normative documents contain pro
23、visions which, through reference in this text, constitute provisions of this part of IEC1119. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC1119 are encouraged to investigate the poss
24、ibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC94-4:1986, Magnetic tape sound recording and reproducing systems Part4: Mechanical magnetic tape properties. IEC1119-1:199
25、2, Digital audio tape cassette system (DAT) Part1: Dimensions and characteristics. IEC1119-2:1991, Digital audio tape cassette system (DAT) Part2: DAT calibration tape. 3 Definitions Under consideration. 4 Technical requirements and test conditions 4.1 Standard atmospheric conditions for testing 4.2
26、 Mechanical characteristics of test equipment The tape transport shall be capable of operation at the normal speed of8,150mm/s 0,5%. The relative speed of the head to the tape shall be3,133m/s. 4.3 Electrical characteristics of test equipment Electrical characteristics of test equipment shall be in
27、accordance with IEC1119-1. 4.4 Calibration tape The calibration tape shall be in accordance with IEC1119-2. 4.5 Reference tape a) The reference tape is intended to be a reference only for the electrical parameters specified in clause5, which are important for system compatibility. b) Alignment of th
28、e recorder heads shall be such that conformity with the relevant IEC primary reference tape is obtained, in order to ensure compatibility of mass-produced domestic recorders and tapes. Compatibility properties of mass produced tapes shall conform to those of the reference tape. c) The reference tape
29、 is defined as a metal powder tape for the DAT cassette system, whose characteristics are approved by the DAT Conference. d) The reference tape is defined according to Table 1 below. 4.6 Condition of the tape to be tested The tape to be tested shall be fully erased (bulk erased). 5 Electrical parame
30、ters to be measured 5.1 RF optimum recording current The optimum recording current is the current required to record on the tape under test a square wave with frequency1/2T chthat results in maximum playback output level. It shall be expressed in dB as the ratio relative to the reference recording c
31、urrent. The optimum recording current of the reference tape is defined as the reference recording current. The playback output level is defined as the fundamental frequency output level of the playback signal obtained from a tape. Table 1 DAT reference tape a Temperature: 20 C 5 C Relative humidity:
32、 45% to75% Air pressure: 86kPa to106kPa Conditioning before testing: 24h Tape Speed mm/s Width mm References batch number Use Country of issue Description 8,15 3,81 RSD-1079 Mandatory Japan Metal powder a See Annex A for the name and address of the supplier of the reference tape.EN61119-3:1994 4 BSI
33、 11-1999 5.2 RF output level The playback output level from a square wave with frequency1/2T ch(main data and sub data) recorded on the tape under test at reference recording current shall be measured. The same procedure shall be repeated for the reference tape. The output level of the tape under te
34、st shall be expressed in decibels as the ratio of the playback output level of the tape under test to that of the reference tape. The same procedure shall be repeated for the square wave with frequency1/72T chautomatic track-finding (ATF). 5.3 RF frequency response The playback output level of the s
35、quare wave with frequency1/8T chand the square wave with frequency1/2T ch(main data and sub data) recorded on the tape under test at reference recording current shall be measured. The same procedure shall be repeated for the reference tape. The frequency response D is expressed by: D = d d o where d
36、 is the relative value in decibels of the playback output level of the1/2T chsignal to that of the1/8T chsignal for the tape under test. d o is the relative value in decibels of the playback output level of the square wave with frequency1/2T chto that of the square wave with frequency1/8T chfor the
37、reference tape. The same procedure shall be repeated for the square wave with frequency1/72T chand the square wave with frequency1/6T ch(ATF). 5.4 Overwrite characteristics The recorded square wave with frequency1/8T chat the reference recording current shall be overwritten by the square wave with f
38、requency1/2T chat the reference recording current (main data and sub-data). The original and the residual playback output levels of the1/8T chsignal shall be measured for the tape under test. The same procedure shall be repeated for the reference tape. The overwrite characteristic W is expressed by:
39、 W = w w o The same procedure shall be repeated for the square wave with frequency1/72T chand the square wave with frequency1/6T ch(ATF). 5.5 Carrier-to-noise ratio (C/N) A square wave with frequency1/2T chis recorded on the tape under test at the reference recording current. The playback output lev
40、el of the square wave with frequency1/2T chand the1/2,54T chnoise level (N tot ) are measured. The1/2,54T champlifier noise level (N amp ) is measured. The resolution bandwidth is10kHz for all measurements. The tape noise level (N tape ) is given by the expression: The C/N is expressed by M as: M =
41、m m o 6 Mechanical and other parameters to be tested 6.1 Tape width The method of measurement of tape width shall be in accordance with IEC94-4. 6.2 Tape width fluctuation The fluctuation shall be defined as the difference between the maximum value and the minimum value obtained from the tape width
42、measurement. 6.3 Total tape thickness The method of measurement of total tape thickness shall be in accordance with IEC94-4. 6.4 Yield force (F3) The method of measurement of yield force shall be in accordance with IEC94-4. 6.5 Residual elongation The method of measurement of residual elongation sha
43、ll be in accordance with IEC94-4. where w is the relative value in decibels of the original output level of the1/8T chsignal to the residual output level of the1/8T chsignal for the tape under test. w o is the relative value in decibels of the original output level of the signal to the residual outp
44、ut level of the1/8T chsignal for the reference tape. where m is the relative value in decibels of the playback output level of the1/2T chsquare wave to the (N tape ) level for the tape under test. m o is the relative value in decibels of the playback output level of the1/2T chsquare wave to the (N t
45、ape ) level for the reference tape. N tape N 2 tot N 2 amp =EN61119-3:1994 BSI 11-1999 5 6.6 Light transmittance The method of measurement of light transmittance shall be in accordance with IEC94-4, except for light wavelength. Light wavelength shall be between800nm and900nm in accordance with IEC11
46、19-1. 6.7 Electrical resistance of magnetic coating The method of measurement of electrical resistance of magnetic coating shall be in accordance with IEC94-4.EN61119-3:1994 6 BSI 11-1999 Annex A (informative) Reference tape The reference tape, RSD-1079, is available from: Sony Corporation Major Cus
47、tomer Sales Division, Magnetic Products Group 6-7-35 Kitashinagawa, Shinagawa-ku Tokyo141,Japan. Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications This European Standard incorporates by dated or undated reference,
48、provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in
49、 it by amendment or revision. For undated references the latest edition of the publication referred to applies. NOTEWhen the international publication has been modified by CENELEC common modifications, indicated by (mod), the relevant EN/HD applies. IEC publication Date Title EN/HD Date 94-4 1986 Magnetic tape sound recording and reproducing systems Part4: Mechanical magnetic tape properties EN60094-4 1994 1119-1 1992 Digital audio tape cassette system (DAT) Part1: Dimensions and characteristics EN61119-1 1994 11
