1、BRITISH STANDARD BS EN 60094-2:1996 BS 6288-2: 1995 IEC94-2:1994 (Including corrigendum, March1995, to IEC94-2:1994) Magnetic tape sound recording and reproducing systems Part 2: Calibration tapes The European Standard EN60094-2:1995 has the status of a British Standard ICS 33.160.30BSEN60094-2:1996
2、 This British Standard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority oftheStandards Board and comes into effect on 15January1996 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference EPL/60
3、Draft for comment90/22224 DC ISBN 0 580 24955 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee EPL/60, Recording, upon which the following bodies were represented: Association of Professional Recording Services Ltd. Audi
4、o Engineering Society British Broadcasting Corporation British Kinematograph, Sound and Television Society British Tape Industry Association Federation of the Electronics Industry ITV Association (ITVA) National Council for Educational Technology (NCET) Royal Photographic Society Royal Television So
5、ciety Amendments issued since publication Amd. No. Date CommentsBSEN60094-2:1996 BSI 11-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Object 3 3 General requirements 3 4 Tapes for use at speeds of38.1cm/s(15in/s) and19.05cm/s(71/2in/s) 3 5
6、 Tapes for use at a speed of9.53cm/s(33/4in/s) 4 6 Tapes for use at a speed of4.76cm/s(17/8in/s) 4 Annex A List of suppliers of calibration tapes of width3.81mm for use at a speed of4.76cm/s 5 List of references Inside back coverBSEN60094-2:1996 ii BSI 11-1999 National foreword This British Standard
7、 has been prepared by Technical Committee EPL/60 and is the English language version of EN60094-2:1995 Magnetic tape sound recording and reproducing systems Part2: Calibration tapes, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC94-2:1994
8、 and its corrigendum (March1995), published by the International Electrotechnical Commission (IEC). The cross-reference of this standard as Part2 of the BS6288 series has been retained to facilitate reference to other parts of the series. This British Standard supersedes BS EN60094-2:1994 (BS6288-2:
9、1994), which is withdrawn. This edition does not reflect a full review or revision of the standard, which will be undertaken in due course. BS6288 consists of the following Parts: A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards ar
10、e responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Part1 (BS EN60094-1) Specification for general conditions and requirements Part2 (BS EN60094-2) Specification for calibration tapes Part 3 Methods of measuring t
11、he characteristics of recording and reproducing equipment for sound on magnetic tape Part 4 (BS EN60094-4) Mechanical magnetic tape properties Part 5 (BS EN60094-5) Specification for electrical magnetic tape properties Part 6 Specification for reel-to-reel systems Part 7 (BS EN60094-7) Specification
12、 for cassettes for commercial tape records and domestic use Part 8 Specification for eight-track magnetic tape cartridge for commercial tape records and domestic use Part 9 Specification for magnetic tape cartridge for professional use Part 10 Specification for time and address codes Part 11 Guide t
13、o an address code for compact cassettes Cross-references Publication referred to Corresponding British Standard IEC94-1:1981 a BS EN60094 Magnetic tape sound recording and reproducing systems Part1:1994 Specification for general conditions and requirements ISO/R266:1963 b BS3593:1963 Recommendation
14、on preferred frequencies for acoustical measurements a IEC94, first edition, referred to in clauses3, 4, 5 and6 has been supserseded by IEC94-1:1981. b ISO/R266, referred to in clause3 has been superseded by ISO266:1975. Summary of pages This document comprises a front cover, an inside front cover,
15、pagesi andii, theENtitle 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.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN
16、60094-2 January1995 ICS33.160.30 Supersedes EN60094-2:1993 Descriptors: Sound system equipment, sound recording and reproduction, magnetic tape, calibration, adjustment, recording characteristic English version Magnetic tape sound recording and reproducing systems Part2: Calibration tapes (IEC94-2:1
17、994) Systmes denregistrement et de lecture du son sur bandes magntiques Partie2: Bandes magntiques talons (CEI94-2:1994) Systeme fr Tonaufzeichnung und -wiedergabe auf Magnetband Teil2: Bezugsbnder (IEC94-2:1994) This European Standard was approved by CENELEC on1994-03-08. CENELEC members are bound
18、to comply with the CEN/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 Cent
19、ral Secretariat 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 st
20、atus as 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 UnitedKingdom. CENELEC European Committee for
21、 Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1995 Copyright reserved to CENELEC members Ref.No.EN60094-2:1995EEN60094-2:1995 BSI 11-1999 2 Foreword The text
22、of document60A(CO)153, future amendment to IEC94-2:1975, prepared by SC60A, Sound recording, of IEC TC60, Recording, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A3 to EN60094-2:1993 on1994-03-08. The text of this document, together with that of IEC94-2:197
23、5 and its amendments1:1987 and2:1991, was published by IEC as the second edition of IEC94-2 in July1994. According to a decision of principle taken by the Technical Board of CENELEC, the approval of EN60094-2:1993/A3 has been converted into the approval of a new EN60094-2. The following dates were f
24、ixed: latest date by which the ENhas to be implemented atnational level by publication of an identical national standard or byendorsement (dop) 1995-07-01 latest date by which the national standards conflicting with the EN haveto be withdrawn (dow) 1995-07-01EN60094-2:1995 BSI 11-1999 3 1 Scope This
25、 standard specifies the minimum requirements for calibration tapes for making adjustment and comparative assessments of the reproducing performance of both professional and domestic magnetic tape recording/reproducing equipment. This standard applies to both lubricated and non-lubricated tapes, reco
26、rded across specified parts or the full width of the tape. 2 Object The object of this standard is to specify the contents, the format and the tolerances of calibration tapes sothat measurements made on any recording/reproducing equipment using tapes manufactured in accordance with the requirements
27、of this standard shall be directly comparable. 3 General requirements Each standard calibration tape shall have at least the following sections: 1) reference level; 2) azimuth; 3) amplitude/frequency response. Each section shall be recorded at a recording angle of90 1, relative to the edge of the ta
28、pe. Over the frequency range used, all of the octave frequencies of the preferred ISO/R266 frequencies, relative to1000Hz, shall be used. Additional frequencies shall be used from the one-third octave. If further frequencies are required, one-sixth octave shall be applied. Each section shall be anno
29、unced and the official IEClanguages are preferred. At the beginning of the tape, the standard tape speed to which the calibration refers, the characteristic to which the tape has been recordedand the date of recording shall be announced, forinstance “IEC calibration tape for38,1cm/s(15in/s) recorded
30、 to a354s time constant in accordance with IEC Publication94, first edition”. An announcement at the beginning of each section shall specify the content of that section; for the reference level section, the short-circuit flux per unit track width; and for the other sections, the short-circuit flux l
31、evel relative to that of the reference level section; for example: Announcements shall be recorded at a peak level slightly lower than the recorded signals in that section. An instruction sheet shall accompany each tape. It shall specify the relevant IEC publications and the date of production of th
32、e calibration tape and shall include at least a description of the contents of the tape. 4 Tapes for use at speeds of38,1cm/s(15in/s) and19,05cm/s(71/2in/s) 4.1 Reference level section A signal at the reference frequency, preferably of1000 30Hz, shall be recorded at a specified short-circuit flux pe
33、r unit track width, preferably of320nWb/m, and having a distortion of less than or equal to1%. The duration of the signal shall be at least30s. The tolerance of the reference flux of commercially available calibration tapes shall not exceed5%. 4.2 Azimuth section Signals of1000Hz and10000Hz shall be
34、 recorded. The1000Hz signal shall be recorded at a specified short-circuit flux per unit track width, preferably of100nWb/m. The duration of the signal shall be at least10s and60s respectively. 4.3 Amplitude/frequency response section The following signals shall be recorded, preferably in the order
35、shown. The first1000Hz signal, recorded at a specified short-circuit flux per unit track width of at least32nWb/m, shall be the reference signal. Each signal shall have a duration of at least10s. The maximum deviation in the frequencies shown shall be3%. 1000Hz,31,5Hz,40Hz,50Hz 1) ,63Hz,80Hz 1) , 10
36、0Hz 1) ,125Hz,250Hz,500Hz,1000Hz, 2000Hz,4000Hz,6300Hz,8000Hz,10000Hz, 12500Hz,14000Hz 1) ,16000Hz,18000Hz 1) , 20000Hz 1) ,1000Hz. The deviation of the recorded levels, relative to the short-circuit flux response curve as given in IEC94-1, shall not exceed 0,5dB for signals up to and including10000
37、Hz nor1dB for signals over10000Hz. Reference level section: 1000Hz at320nWb/m. Azimuth section: 1000Hz at minus10dB. Amplitude/frequency response section: 1000Hz at minus20dB. 1) OptionalEN60094-2:1995 4 BSI 11-1999 The level fluctuations up to and including10000Hz shall not exceed0,5dB and shall no
38、t exceed1dB over10000Hz, measured with an appropriate track per reproduction channel. 5 Tapes for use at a speed of9,53cm/s(33/4in/s) 5.1 Reference level section A signal at the reference frequency, preferably of315 10Hz, shall be recorded at a specified short-circuit flux per unit track width, pref
39、erably of250nWb/m, and having a distortion of less than or equal to1%. The duration of the signal shall be at least30s. The tolerance of the reference flux of commercially available calibration tapes shall not exceed5%. 5.2 Azimuth section Signal of315Hz and10000Hz shall be recorded. The315Hz signal
40、 shall be recorded at a specified short-circuit flux per unit track width, preferably of50nWb/m. The duration of the signals shall be at least10s and60s respectively. 5.3 Amplitude/frequency response section The following signals shall be recorded, preferably in the order shown. The first315Hz signa
41、l, recorded at a specified short-circuit flux per unit track width of at least25nWb/m, shall be the reference signal. Each signal shall have a duration of at least1s. The maximum deviation in the frequencies shown shall be3%. 315Hz,31,5Hz,40Hz,50Hz 1) ,63Hz,80Hz 1) , 100Hz 1) ,125Hz,250Hz,315Hz 1) ,
42、500Hz, 1000Hz,2000Hz,4000Hz,6300Hz,8000Hz, 10000Hz,12500Hz,14000Hz 1) ,16000Hz 1) , 18000Hz 1) ,20000Hz 1) ,315Hz. The deviation of the recorded levels, relative to the short-circuit flux response curve as given in IEC94-1, shall not exceed 0,5dB for signals up to and including8000Hz nor1dB for sign
43、als over8000Hz. The level fluctuations up to and including8000Hz shall not exceed0,5dB nor1dB over8000Hz, measured with an appropriate track per reproduction channel. 6 Tapes for use at a speed of4,76cm/s(17/8in/s) 6.1 Reference level section A signal at the reference frequency, preferably of315 10H
44、z, shall be recorded at a specified short-circuit flux per unit track width, preferably of250nWb/m, and having a distortion of less than or equal to3%. The duration of the signal shall be at least30s. The tolerance of the reference flux of commercially available calibration tapes shall not exceed5%.
45、 6.2 Azimuth section Signal of315Hz and10000Hz shall be recorded. The315Hz signal shall be recorded at a specified short-circuit flux per unit track width, preferably of25nWb/m. The duration of the signal shall be at least10s and60s respectively. 6.3 Amplitude/frequency response section The followin
46、g signals shall be recorded, preferably in the order shown. The first315Hz signal, recorded at a specified short-circuit flux per unit track width of at least25nWb/m, shall be the reference signal. Each signal shall have a duration of at least10s. The maximum deviation in the frequencies shown shall
47、 be3%. 315Hz,31,5Hz,40Hz,50Hz 2) ,63Hz,80Hz 2) , 100Hz 2) ,125Hz,250Hz,315Hz 2) ,500Hz, 1000Hz,2000Hz,4000Hz,6300Hz,8000Hz, 10000Hz,12500Hz,14000Hz 2) ,16000Hz 2) , 18000Hz 2) ,20000Hz 2) ,315Hz. The deviation of the recorded levels, relative to the short-circuit flux response curve as given in IEC9
48、4-1, shall not exceed 0,5dB for signals up to and including6300Hz and shall not exceed 1dB from6300Hz up to14000Hz. The level fluctuations up to and including6300Hz shall not exceed0,5dB nor1dB over6300Hz, measured with an appropriate track per reproduction channel. 2) OptionalEN60094-2:1995 BSI 11-
49、1999 5 Annex A List of suppliers of calibration tapes of width3.81mm for use at a speed of4.76cm/s Over the last few years it has become evident that, due to differences in the primary measurement of tape flux and the change in performance of replay heads based on new technology, calibration tapes from different sources have led to divergent results when played on any one particular player. Steps have been taken to unify the methods of measurement and these steps have resulted in a unified calibration tape which conforms to the estab
