1、CENELEC EN*bLL39-3 94 = 3404583 0346823 435 BRITISH STANDARD Digital audio tape cassette system (DAT) Part 3. DAT tape properties The European Standard EN 61119-3 : 1994 has the status of a British Standard UDC 621.396.7 : 681.84.083.84 BS EN 61119-3 : 1994 IEC 1119-3 : 1992 CENELEC EN*bL339-3 94 34
2、04583 0346824 371 BS EN 61119-3 : 1994 Cooperating organizations 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
3、Netherlands Finland Norway France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 16
4、 December 1994 O BSI 1994 “he following BSI references relate to the work on this standard: Committee reference EEL/ZZ Draft for comment 88/30302 DC ISBN O 680 23629 7 Amendments issued since publication Amd. No. Date Ext affected -_ - - _ - - _ . - - .- CENELEC EN*blll9-3 94 m 3404583 0146825 208 m
5、 BS EN 61119-8 : 1994 Contents Page Cooperating organizations Inside front cover National foreword i Foreword 2 Text of EN 61119-3 3 National annex NA (informative) Committees responsible Inside back cover _- Kational annex NB (informative) Cross-references Inside back cover National foreword This B
6、ritish Standard has been prepared under the direction of the Electrotechnical Sector Board and is the English language version of EN 61119-3 : 1994 LXqitul uudio tape ccissette systern (DATJ Pwt 3: DAT tape propwties, published by the European Committee for Electrotechnical Standardization (CEMELEC)
7、. It is identical with IEC 1119-3 : 1992, published by the International Electrotechnical Commission (IEC). BS EN 61119 consists of the following Parts: Pait 1 Lhkensions and cliamcterstics Part 2 DAT culibrutiorz tap Part 3 DAT tape properties part 5 DAT fur prqfessorial use1) part 6 Serial copg r?
8、ici?qm?writ sgstmn Part T DAT logo upplcation nile) Part 4 Chiil.actw yaclzfonrzatl) Compliance with a British Standard does not of itself confer immunity from legal obligations. in preparation. i CENELEC EN*b1119-3 94 = 3404583 0346826 144 m EUROPEAN STANDARD EN 61119-3 NORME EUROPENNE EUROPISCHE N
9、ORM July 1994 UDC 621.306.7 : 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) Part 3: DAT t
10、ape properties (IEC 1119-3 1992) Systme audionumrique cassette (DAT) Partie 3: Proprits des bandes Digitales Tonband-Kassetten-System Teil 3: DAT-Bandeigenschaften (CE1 1119-3 : 1992) (IEC 1119-3 : 1992) This European Standard was approved by CENELEC on 1994-0.5-15. CENELEC members are bound to comp
11、ly with the CEIVXENELEC 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 Sec
12、retariat or to 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
13、 the official 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 Elect
14、rotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1994 Copyright reserved to CENELEC members Ref. No. EN 61119-3 : 1994 E Page 2 EN 61119-3 : 1994 Foreword The CENELE
15、C questionnaire procedure, performed for finding out whether or not the International Standard IEC 1119-3 : 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
16、 members for formal vote and was approved by CENELEC as EN 61119-3 on 15 May 1994. The following dates were fixed: - latest date of publication of an identical national standard (dop) 1995-03-15 - latest date of withdrawal of conflicting national standards (dow) 1995-03-15 Annexes designated nonnati
17、ve 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. Page 3 EN 61119-3 : 1994 CONTENTS Page Clause 1 Scope and object . 3 3 2 Normative references . 3 Definitions (under considerati
18、on) 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 4 4.4 Calibration tape 4 4.5 Reference tape . 4 4.6 Condition of the tape to be tested . 4 5 El
19、ectrical parameters to be measured . 4 5.2 RF output level 5 5.3 RF frequency response 5 5.4 Overwrite characteristics . 5 5.1 RF optimum recording current . 4 5.5 Carrier-to-noise ratio (C/N) 6 6 Mechanical and other parameters fo be tested . 6 6.1 Tape width . 6 6.2 Tape width fluctuation 6 6.3 To
20、tal tape thickness . 7 6.4 Yield force (F3) . 7 6.5 Residual elongation 7 6.6 Light transmittance . 7 6.7 Electrical resistance of magnetic coating 7 Annexes A (informative) Reference tape 8 ZA (normative) Other publications quoted in this standard with the refences of the relevant European publicat
21、ions 1 0 Page 4 EN 61119-3 : 1994 DIGITAL AUDIO TAPE CASSETTE SYSTEM (DAT) Part 3: DAT tape properties 1 Scope and object This part of IEC 11 19 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
22、 requirements applicable to these tapes. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 1119. At the time of publication, the editions indicated were valid. All normative documents are subje
23、ct to revision, and parties to agreements based on this part of IEC 1119 are ecouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 94-4: 1986,
24、 Magnetic tape sound recording and reproducing systems - Fart 4: Mechanical magnetic tape properties IEC 1119-1: 1992, Digital audio tape cassette system (DAT) - Part i: Dimensions and characteristics IEC 1 11 9-2: 1991, Digital audio tape cassette system (RAT) - Fart 2: RAT calibration tape 3 Defin
25、itions Under consideration. 4 Technical requirements and test conditions 4.1 Standard atmospheric conditions for testing - Temperature: 20 OC f 5 OC - Relative humidity: 45 % to 75 Yo - Air pressure: 86 kPa to 106 kPa - Conditioning before testing: 24 h 4.2 The tape transport shall be capable of ope
26、ration at the normal speed of 8,150 mm/s f 0,5 Yo. Mechanical characteristics of test equipment The relative speed of the head to the tape shall be 3,133 m/s. - - - CENELEC EN*bLl39-3 94 m 3404583 0346830 675 i Tape speed Width mmis mm 8,15 3.81 Page 5 EN 61119-3 : 1994 Reference batch Use Country o
27、f Descriprion number issue RSD-1079 Mandatory Japan Metal powder 4.3 Electrical characteristics of test equipment shall be in accordance with IEC 11 19-1 Electrical characteristics of test equipment 4.4 Calibration tape The calibration tape shall be in accordance with IEC 11 19-2. 4.5 Reference tape
28、 a) The reference tape is intended to be a reference only for the electrical parameters specified in clause 5, which are important for system compatibility. b) Alignment of the recorder heads shall be such that conformity with the relevant IEC primary reference tape is obtained, in order to ensure c
29、ompatibility 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 is defined as a metal powder tape for the DAT cassette system, whose characteristics are approved by the DAT Conference. d)
30、The reference tape is defined according to table 1 below. Table 1 - DAT reference tape 4.6 The tape to be tested shall be fully erased (bulk erased). Condition of the tape to be tested 5 Electrical parameters to be measured 5.1 RF optimum recording current The optimum recording current is the curren
31、t required to record on the tape under test a square wave with frequency 1/2Tch that results in maximum playback output level. It shall be expressed in dB as the ratio relative to the reference recording current. The optimum recording current of the reference tape is defined as the reference recordi
32、ng current. See annex A for the name and address of the supplier of the reference tape. - - - . . -. - CENELEC EN*b3339-3 94 i 3404583 0346833 503 Page 6 EN 61119-3 : 1994 The playback output level is defined as the fundamental frequency output level of the playback signal obtained from a tape. 5.2
33、RF output level The playback output level from a square wave with frequency 1/2Tch (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 test shall be
34、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 frequency 1/72Tch automatic track-finding (ATF). 5.3 RF frequency response The playback output level of the square wave
35、with frequency 1/8Tch and the square wave with frequency i/2Tch (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, where d is the rel
36、ative value in decibels of the playback output level of the I/2Tch signal to that of the 1/8Tch signai for the tape under test. do is the relative value in decibels of the playback output level of the square wave with frequency 112Tch to that of the square wave with frequency 118Tch for the referenc
37、e tape. The same procedure shall be repeated for the square wave with frequency 1/72Tch and the square wave with frequency 1/6TCh (ATF). 5.4 Overwrite characteristics The recorded square wave with frequency 1/8Tch at the reference recording current shall be overwritten by the square wave with freque
38、ncy 1/2Tch at the reference recording current (main data and sub-data). The original and the residual playback output levels of the 1/8Tch signal shall be measured for the tape under test. The same procedure shall be repeated for the reference tape. _ I CENELEC EN*blLL7-3 94 W 3404583 0346832 448 W
39、Page 7 EN 61119-3 : 1994 The overwrite characteiistic W is expressed by: w-w-wo where w is the relative value in decibels of the original output lev Fax: O181 996 7001. In response to ordeis for international standards, it is BSI policy to supply the BSI implementation of those that have been publis
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