BS EN 60094-5-1989 Magnetic tape sound recording and reproducing systems - Specification for electrical magnetic tape properties《磁带录音和放音系统 磁带特性规范》.pdf

1、BRITISH STANDARD BS EN 60094-5:1994 Implementing Amendment No. 1, not published separately BS 6288-5: 1989 Incorporating Amendments Nos. 1 and 2 IEC 94-5:1988 Incorporating Amendment 1:1996 Magnetic tape sound recording and reproducing systems Part 5: Specification for electrical magnetic tape prope

2、rties The European Standard EN 60094-5:1993 with the incorporation of amendmentA1:1996 has the status of a British Standard ICS 33.160.30BSEN 60094-5:1994 This British Standard, having been prepared under the directionof the Electronic Equipment Standards Policy Committee, was published underthe aut

3、hority of the Board ofBSIand comes into effect on 31July 1989 BSI 12-1998 The following BSI references relate to the work on this standard: Committee reference EEL/22 Draft for comment 79/33117 DC ISBN 0 580 17238 4 Committees responsible for this British Standard The preparation of this British Sta

4、ndard was entrusted by the Electronic Equipment Standards Policy Committee (EEL/-) to Technical Committee EEL/22, upon which the following bodies were represented: British Broadcasting Corporation British Kinematograph, Sound and Television Society Council for Educational Technology for the United K

5、ingdom Electronic Engineering Association Independent Television Association Sound and Communication Industries Federation The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Association of Professional Recording Studios Audio Engineering Soc

6、iety British Tape Industry Association Royal Photographic Society Amendments issued since publication Amd. No. Date of issue Comments 6407 September 1991 8126 March 1994 9292 February 1997 Indicated by a sideline in the marginBSEN60094-5:1994 BSI 12-1998 i Contents Page Committees responsible Inside

7、 front cover National foreword ii Foreword 2 Text of EN 60094-5 5 List of references Inside back coverBSEN 60094-5:1994 ii BSI 12-1998 National foreword This British Standard has been prepared by Subcommittee EPL/100/2 (formerly EEL/22) and is the English language version of EN60094-5:1993 Magnetic

8、tape sound recording and reproducing systems. Part 5 Electrical magnetic tape properties including amendment A1:1996, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC94-5:1988 including Amendment 1:1996, published by the International Elect

9、rotechnical Commission (IEC). Agreement has been given to retain the cross-reference of this standard as Part 5 of the BS6288 series for ease of reference in relation to other Parts of the series. Reference to page numbers in the text relate to the IEC page numbers given in brackets at the bottom of

10、 each page. BS 6288 consists currently of the following Parts: Part 1 (BS EN 60094-1): Specification for general conditions and requirements; Part 2 (BS EN 60094-2): Calibration tapes; Part 3 (BS EN 60094-3): Methods of measuring the characteristics of recording equipment for sound on magnetic tape;

11、 Part 4 (BS EN 60094-4): Mechanical magnetic tape properties; Part 5 (BS EN 60094-5): Electrical magnetic tape properties; Part 6: Specification for reel-to-reel systems; Part 7 (BS EN 60094-7): Specification for cassettes for commercial tape records and domestic use; Part 8: Specification for eight

12、 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 to and address code for compact cassettes. Cross-references Publication referred to C

13、orresponding British Standard EN 60094 BS EN 60094 Magnetic tape sound recording and reproducing systems EN 60094-1:1993 BS EN 60094-1:1994 (BS 6288-1:1994) (IEC 94-1:1981) Specification for general conditions and requirements EN 60094-2:1995 a BS EN 60094-2 (BS 6288-2:1995) Calibration tapes (IEC 9

14、4-2:1994) EN 60094-7:1993 BS EN 60094-7:1994 (BS 6288-7:1994) (IEC 94-7:1986) Specification for cassettes for commercial tape records and domestic use EN 60651:1994 BS EN 60651:1994 Specification for sound level meters (IEC 651:1979) HD 311.6 S1:1986 BS 6288 Magnetic tape sound recording and reprodu

15、cing systems (IEC 94-6:1985) Part 6:1987 Specification for reel-to-reel systems IEC 50 (806):1975 BS 4727 Glossary of electrotechnical, power, telecommunication, electronics, lighting and colour terms Part 3 Terms particular to telecommunications and electronics Group10:1979 Recording and reproducti

16、on of sound and video terminologyBSEN60094-5:1994 BSI 12-1998 iii A British Standard does not purport to include all the necessary 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

17、 from legal obligations. IEC 386:1972 BS 4847:1989 Method of measurement of speed fluctuations in sound recording and reproducing equipment a EN 60094-2:1993 has been superseded by EN 60094-2:1995. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, theENtit

18、le page, pages 2 to 30, 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.30 blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60094-5 Oc

19、tober 1993 + A1 March 1996 UDC 621.396.7:681.8 Supersedes HD 311.5 S1:1989 Descriptors: Sound recording, magnetic tape, electrical property English version Magnetic tape sound recording and reproducing systems Part 5: Electrical magnetic tape properties (includes amendment A1:1996) (IEC 94-5:1988 +

20、A1:1996) Systmes denregistrement et de lecture du son sur bandes magntiques Cinquime partie: Proprits lectriques des bandes magntiques (inclut lamendement A1:1996) (CEI 94-5:1988 + A1:1996) Systeme fr Tonaufzeichnung und -wiedergabe auf Magnetband Teil 5: Elektrische Eigenschaften von Magnetbndern (

21、enthlt nderung A1:1996) (IEC 94-5:1988 + A1:1996) This European Standard was approved by CENELEC on 1993-09-22; amendment A1 was approved by CENELEC on 1996-03-05. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European St

22、andard 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 any CENELEC member. This European Standard exists in three official versions (English, F

23、rench, 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 versions. CENELEC members are the national electrotechnical committees of Austria, Belgiu

24、m, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elek

25、trotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1993 Copyright reserved to CENELEC members Ref. No. EN 60094-5:1993 + A1:1996 EEN60094-5:1993 BSI 12-1998 2 Foreword As a consequence of the IEC-CENELEC Agreement, HD311.5 S1:1989 (IEC94-5:1988) was submitted to the CENEL

26、EC voting procedure for conversion into a European Standard. The text of the International Standard was approved by CENELEC as EN60094-5 on22September1993. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard, Annex ZA is normative. Fo

27、reword to amendment A1 The text of document 60A/178/FDIS, future amendment 1 to IEC94-5:1988, prepared by SC 60A (transformed into SC 100B, Recording, of IEC TC 100, Audio, video and multimedia systems and equipment), was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amen

28、dment A1 to EN60094-5:1993 on 1996-03-05. The following dates were fixed: Contents Page Foreword 2 Section 1. General 1.1 Scope 5 1.2 Object 5 Section 2. Technical requirements and informationconcerning testing conditions 2.1 Standard atmospheric conditions 5 2.2 Mechanical characteristics of tape t

29、ransports 5 2.3 Electrical characteristics of test equipment 6 2.4 Calibration tape 7 2.5 Reference tape 7 2.6 Bias 8 2.6.1 Reference bias 9 2.6.2 Conventional test bias 9 Section 3. Parameters to be measured 3.1 Bias ratio 11 3.2 Maximum output level 11 3.3 Relative tape sensitivity 14 3.4 Referenc

30、e level to bias noise ratio 14 3.5 Signal to bias noise ratio 15 3.6 Reference level to d.c. noise ratio 15 3.7 Reference level to print ratio 16 3.8 Erasing attenuation 17 3.9 Uniformity variations 18 3.10 Drop-out annoyance 18 Section 4. Information to be supplied by the magnetic tape manufacturer

31、 4.1 Recommended form for published data 21 Appendix A Equipment noise correction 25 Appendix B Measuring means 26 Appendix C Intermodulation distortion measuring equipment 28 Annex ZA (normative) Other international publications quoted inthisstandardwith the references of the relevant European publ

32、ications 29 Figure 1 Output signal spectrum 12 Figure 2 Input signal spectrum 12 Figure 3 Output signal spectrum 13 Figure 4 Characteristics of high-pass filter for d.c. noise measurement 16 Figure 5 Circuit for d.c. noise measurement 16 Figure 6 19 Figure A1 Subtracting noise powers 25 latest date

33、of publication of an identical national standard (dop) 1994-10-01 latest date of withdrawal of conflicting national standards (dow) latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1996-12-01 latest da

34、te by which the national standards conflicting with the amendment have to be withdrawn (dow) 1996-12-01EN 60094-5:1993 BSI 12-1998 3 Page Table I Rated tape speeds 5 Table II Type of head 6 Table III IEC primary reference tapes 8 Table IV Table of maximum output levelsspecified for domestic IEC prim

35、ary referencetapes 10 Table V 21 Table VI Recommended parameters to bequotedin published data for professionaltapes6.30mm wide 22 Table VII Recommended parameters to bequotedin published data for domestic tapeandunrecorded tape used for commercial taperecords(6.30mm wide) 23 Table VIII Recommended p

36、arameters to bequoted in published data for domestic tapeandunrecorded tape used for commercialtaperecords(3.81mm wide) 244 blankEN 60094-5:1993 BSI 12-1998 5 Section 1. General 1.1 Scope This standard applies to non-perforated magnetic tape used for professional and domestic analogue sound recordin

37、g and reproduction. 1.2 Object The object of this standard is to list and define the characteristics, methods of measurement and equipment necessary to determine the electrical properties of magnetic tapes. It will also enable users of magnetic tapes to compare the technical product data of differen

38、t manufacturers, produced in accordance with this standard. Section 2. Technical requirements and information concerning testing conditions 2.1 Standard atmospheric conditions Where necessary the tests shall be preceded by a period of conditioning to ensure that the test specimen has reached equilib

39、rium with the environment. 2.2 Mechanical characteristics of tape transports a) Tape speed The tape transports shall be capable of operating at the mandatory rated tape speed specified inTable I. Table I Rated tape speeds Other tape speeds may be required when additional optional information is give

40、n. The tape speed fluctuations (wow and flutter) shall be not more than 0.15% when measured in accordance with IEC Publication386. b) Tape widths Tape transports shall be capable of accommodating tape widths of 6.30mm and/or 3.81mm with tolerances as specified in IEC Publication 94-1. In addition ta

41、pe transports may be used to accommodate the other tape widths and track allocations specified in IEC Publication 94-1 or IEC Publications 94-6 to 94-9. c) Tape guides Tape guides shall be such as to ensure stability of measurement without affecting the inherent characteristics of the tape. d) Tape

42、tensions The tape tensions at the recording and replay heads shall be 1.0 0.4N for 6.30mm wide tapes and0.5 0.2N for 3.81mm wide tapes. It is recommended that pressure pads should not be used. e) Heads For details see Table II and Appendix B. Ambient temperature Relative humidity Tape application Sp

43、eed (cm/s) Professional 6.30mm wide tapes 38.10.2% Domestic 6.30mm wide tapes 9.530.2% Domestic 3.81mm wide tapes 4.760.2%EN 60094-5:1993 6 BSI 12-1998 Table II Type of head f) Tape wrap The total angular displacement of the tape around the head. The tape wrap shall be6 2 (0.105 0.035 rad) around ea

44、ch head. The heads shall be set or adjustments provided so that: i) the face of the head contacting the tape is parallel to the corresponding faces of the guides; ii) the head is positioned so that the tape wrap is symmetrical with respect to the gap; iii) the head gap alignment can be set accuratel

45、y and rigidly. If the tape under test has a coating thickness greater than that of the reference tape being used, the wrap symmetry with respect to the gap shall be adjusted for maximum short wavelength response. 2.3 Electrical characteristics of test equipment a) Reproducing characteristic The repr

46、oducing characteristic of the test equipment used shall give a flat frequency response when reproducing the relevant calibration tape specified in IEC Publication 94-2. b) Recording characteristic The recording chain shall be adjusted to obtain constant current in the recording head over the specifi

47、ed audio-frequency range. The third harmonic distortion of both recording and reproducing chains shall be less than 0.02% throughout the measuring range, for signal levels which enable the maximum output level to be obtained from the tape under test. The weighted system noise (including hum) generat

48、ed by the recording and reproducing chains should be at least 12dB below the combined value of weighted system and tape noise. If this condition cannot be achieved a corrected noise value may be derived from the equipment noise correction curve (see Appendix A). c) Bias and erase requirements The si

49、gnal applied to the bias and erase heads shall be equal to a frequency of 80kHz or higher with an even harmonic distortion content of less than 0.05%. A higher bias frequency is necessary when optional measurements are made at duplicating tape speeds. d) Output level meter The meter used for all measurements shall be of the r.m.s. (square law) type specified in IECPublication651. Type of tape Erase All tests Record All tests Replay All tests Country of origin Track configuration Track c