1、BRITISH STANDARD BS EN 60843-1:1994 IEC843-1: 1993 Helical-scan video tape cassette system using8mm magnetic tape8mm video Part1: General specifications The European Standard EN60843-1:1994 has the status of a BritishStandard UDC 621.397.454BSEN60843-1:1994 This BritishStandard, having been prepared
2、 under the directionof the Electronic Equipment Standards Policy Committee, was published underthe authority of the Standards Board and comesintoeffect on 15October1994 BSI01-2000 The following BSI references relate to the work on this standard: Committee reference EEL/22 Draft for comment91/34807 D
3、C ISBN 0 580 23447 9 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 Netherlands Finlan
4、d Norway France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom Amendments issued since publication Amd. No. Date CommentsBSEN60843-1:1994 BSI 01-2000 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN60843-1 5 Nati
5、onal annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back coverBSEN60843-1:1994 ii BSI 01-2000 National foreword This Part of BSEN60843 has been prepared under the direction of the Electronic Equipment Standards Policy Committee
6、 and is the English language version of EN60843-1:1994 Helical-scan video tape cassette system using8mm magnetic tape8mm Video, Part1: General specifications, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC843-1:1993 published by the Inter
7、national Electrotechnical Commission (IEC). This BritishStandard supersedes BS7065:1989. Any references elsewhere to BS7065:1989 should be read as references to BS EN60843-1:1994. The foreword of EN6043-1 makes reference to the “date of withdrawal”, dow of the relevant national standard. In this cas
8、e the relevant national standard is BS7065:1989 which will be withdrawn on the 15March1995. 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
9、 of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to48, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorp
10、orated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN60843-1 April 1994 UDC 621.397.454 Supersedes HD531 S1:1989 Descriptors: Electroacoustics, video recording, recording apparatus, video tape recorders, magnetic tapes, c
11、assettes for magnetic tapes, interchangeability, electrical properties, mechanical properties, recording characteristics English version Helical-scan video tape cassette system using8mm magnetic tape 8mm Video Part1: General specifications (IEC843-1:1993) Systme de magnstoscope cassette balayage hli
12、codal utilisant la bande magntique de8mm Vido8mm Partie1: Gnralitis (CEI843-1:1993) Video-Bandkassettensystem mit Schrgspuraufzeichnung auf Magnetband8mm Video8 Teil1: Allgemeine Festlegungen (IEC843-1:1993) This European Standard was approved by CENELEC on 1994-03-08. CENELEC members are bound to c
13、omply 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 Central
14、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 status
15、 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 Ele
16、ctrotechnical Standardization 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. EN60843-1:1994 EEN60843-1:1994 BSI 01-2000 2 Foreword The text o
17、f document60B (CO)148, as prepared by Sub-Committee60B: Video recording, of IEC Technical Committee60: Recording, was submitted to the IEC-CENELEC parallel vote in March1993. The reference document was approved by CENELEC as EN60843-1 on8March1994. This European Standard replaces HD531 S1:1989. The
18、following dates were fixed: For products which have complied with HD531S1:1989 before1995-03-15, as shown by themanufacturer or by a certification body, this previous standard may continue to apply for production until2000-03-15. Annexes designated “normative” are part of the body of the standard. A
19、nnexes designated “informative” are given only for information. In this standard, Annex A is informative and Annex ZA is normative. Contents Page Foreword 2 Section 1. General 1.1 Scope and object 5 1.2 Normative references 5 1.3 Environmental conditions 5 Section 2. Video tape 2.1 Types of magnetic
20、 tape and reference tape 5 2.2 Physical properties of the tape 5 2.2.1 Magnetic tape width 5 2.2.2 Magnetic tape width fluctuation 5 2.2.3 Magnetic tape thickness 5 2.2.4 Transparency of the magnetic tape 6 2.3 Magnetic properties of the tape 6 2.4 Recording characteristics of the tape 6 2.4.1 Video
21、 characteristics of the tape 6 2.4.2 Auxiliary audio characteristics 7 Section 3. Video tape cassette 3.1 Mechanical parameters 7 3.1.1 Dimensions of the cassette 7 3.1.2 Datum planes Z, X and Y 7 3.1.3 Tape winding 7 3.1.4 Window and label 7 3.1.5 Withdrawal force 7 3.1.6 Support areas A, B, C and
22、D 7 3.1.7 Cassette holding areas 8 3.1.8 Incorrect insertion protection 8 3.1.9 Accidental erasure protection 8 3.1.10 Recognition holes 8 3.1.11 Changer grip 8 3.1.12 Lid 8 3.1.13 Reels 9 3.1.14 Reel spring 9 3.2 Magnetic tape length 9 3.3 Leader and trailer tape 9 3.3.1 Automatic stop 9 3.3.2 Dime
23、nsions of the leader and trailer tape 9 3.3.3 Transparency of the leader and trailer tape 9 3.3.4 Splicing 9 3.4 Cassette designation 9 Section 4. Video cassette recorders 4.1 Tape speed 23 latest date of publication ofan identical national standard (dop) 1995-03-15 latest date of withdrawal ofconfl
24、icting national standards (dow) 1995-03-15EN60843-1:1994 BSI 01-2000 3 Page 4.1.1 525 line60 field system 23 4.1.2 625 line50 field system 23 4.2 Drum diameter 23 4.3 Tape tension 24 4.4 Inclined azimuth angle 24 4.5 Track configuration and dimensions 24 Section 5. Recording characteristics of the v
25、ideosignal 5.1 Video recording system 27 5.1.1 Block diagram for video recording 27 5.1.2 Frequency spectrum allocation of recordingsignals 27 5.2 Recording of the luminance component 28 5.2.1 Luminance filter 28 5.2.2 Pre-emphasis and clipping 28 5.2.3 Modulation characteristics 30 5.2.4 FM high-pa
26、ss filter 30 5.2.5 Recording current 30 5.3 Recording of the chrominance component 30 5.3.1 Recording method 30 5.3.2 Pre-emphasis 30 5.3.3 Conversion method 30 5.3.4 Recording equalization 31 5.3.5 Recording current 31 5.3.6 Colour burst amplitude 31 5.3.7 Time difference between luminance and chro
27、minance 31 Section 6. Recording characteristics of the audiosignal 6.1 Audio recording system 31 6.2 FM audio signal recording 32 6.2.1 Carrier frequency 32 6.2.2 Reference deviation 32 6.2.3 Maximum deviation 32 6.2.4 Recording FM signal channel bandwidth 32 6.2.5 Recording current 32 6.2.6 Noise r
28、eduction 32 6.2.7 Others 32 6.3 PCM audio signal recording 32 6.3.1 Audio signal format 32 6.3.2 PCM signal format 33 6.3.3 PCM signal train 40 6.3.4 Error correction 40 6.3.5 Error detection 42 Page 6.3.6 Modulation 42 6.3.7 Recording conditions 42 6.3.8 Noise reduction 42 6.4 Audio signal recordin
29、g on the auxiliary audio track 42 6.4.1 Reference level 42 6.4.2 Playback equalization 42 6.4.3 Noise reduction 42 6.5 Noise reduction system 42 6.5.1 Specifications for FM and PCM audio 42 6.5.2 Specifications for AUX audio 44 Section 7. Characteristics of the tracking system 7.1 Tracking pilot sig
30、nal recording 46 7.1.1 Tracking pilot signal frequencies 46 7.1.2 Recording current 46 7.2 Recording head positioning pilot signal recording (optional) 47 7.2.1 The burst pilot signal write and read area 47 7.2.2 The burst pilot signal frequency 47 7.2.3 Recording current 47 Section 8. Auxiliary tra
31、ck for cue 8.1 Recording on auxiliary cue track 47 Annex A (informative) Reference tape and sub-reference tape 48 Annex ZA (normative) Other international publications quoted in this standard with thereference of this relevant European publications 48 Figure 1 Appearance of the video cassette (topan
32、d side view) 10 Figure 2 Appearance of the video cassette (bottomview) 11 Figure 3 Datum areas and supported areas 12 Figure 4 Internal structure, tape path and lightpath (top view) 13 Figure 5 Reel of the cassette 14 Figure 6 Relationship between the reel and reeltable 15 Figure 7 Reel lock and rel
33、ease 16 Figure 8 Lid lock and release 17 Figure 9 Maximum size of lid (side view) 18 Figure 10 Lid structure 18 Figure 11 Lid configuration when rotating andwhen open 19 Figure 12 Minimum space for recorder and/or player loading mechanism 20EN60843-1:1994 BSI 01-2000 4 Page Figure 13 Light path and
34、light window 21 Figure 14 Leader and trailer tape 22 Figure 15 Force needed to unlock the reel lock 22 Figure 16 Force needed to unlock the lid lock 23 Figure 17 Force needed to open the lid 23 Figure 18 Azimuth angle of video heads (lookingat the gap) 24 Figure 19 Track configuration and dimensions
35、(viewed on the magnetic sensitive side) 24 Figure 20 Video track area allocation and wrap angle (viewed on the magnetic sensitiveside) 26 Figure 21 Block diagram for video recording 27 Figure 22 Frequency spectrum allocation ofrecording signals 28 Figure 23 Example of a sub pre-emphasis circuit 29 F
36、igure 24 Typical main pre-emphasis circuit 29 Figure 25 Example of phase shift circuit 31 Figure 26 Typical equalization circuit 31 Figure 27 CRC block contents 35 Figure 28 Data arrangement in the525 line60 field system 36 Figure 29 Data arrangement in the625 line50 field system 36 Figure 30 Interl
37、eave format in the525 line60 field system 41 Figure 31 Interleave format in the625 line50 field system 41 Figure 32 Measurement method of transientresponse 43 Figure 33 Linearity for FM and PCM audio 44 Figure 34 Example of noise reduction circuit for FM and PCM audio 44 Figure 35 Linearity for AUX
38、audio 45 Figure 36 Example of a noise reduction circuit for AUX audio 46 Figure 37 Burst pilot signal area allocation 47 Table 1 General tolerances for various dimensions of video tape cassette (except those forwhich tolerances are otherwisespecified) 23 Page Table 2 Pre-emphasis characteristics (su
39、b+main+AC Clip) 29 Table 3 Sub pre-emphasis characteristics forreference 29 Table 4 Pre-emphasis characteristics of chrominance signal 30 Table 5 Audio channel arrangement 32 Table 6 PCM conversion algorithm 34 Table 7 ID word contents 37 Table 8 Numeral code 39 Table 9 Month code 40 Table 10 Day co
40、de 40 Table 11 Frequency response for FM and PCM audio 43 Table 12 Frequency response for AUX audio 45EN60843-1:1994 BSI 01-2000 5 Section 1. General 1.1 Scope and object This part of IEC843 applies to magnetic video recording and/or playback with8mm tape cassettes on two-head helical-scan video cas
41、sette recorders, suitable for the recording and/or playback of monochrome as well as colour television signals. The object of this part is to define the electrical and mechanical characteristics of equipment which will provide for interchangeability of recorded cassettes. This will include the abili
42、ty to reproduce recordings made on both types of magnetic tapes defined in section2. The requirements given are related to525 line60 field or625 line50 field systems, NTSC and PAL respectively. 1.2 Normative references The following normative document contains provisions which, though reference in t
43、his text, constitute provisions of this part of IEC843. At the time of publication, the edition indicated was valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC843 are encouraged to investigate the possibility of applying the most recent editi
44、on of the normative document indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC843-2:1993, Helical-scan video tape cassette system using8mm magnetic tape8mm video Part2:PCM multi-track audio systems. IEC843-3:1993, Helical-scan video tape casse
45、tte system using8mm magnetic tape8mm video Part3:High-band specifications for8mm video Hi8. IEC1105:1991, Reference tapes for video tape recorder systems. 1.3 Environmental conditions Tests and measurements made on the system to check the requirements of this standard shall be carried out under the
46、following conditions: Section 2. Video tape 2.1 Types of magnetic tape and reference tape The8mm video tape exists in two types: type A and type B. Type A is a metal powder tape or its equivalent, the characteristics of which are referred to as type A reference (seeAnnex A). Type B is a metal evapor
47、ated tape or its equivalent, the characteristics of which are referred to as type B reference (seeAnnex A). The performance of reference tapes is specified in IEC1105. The reference tapes are intended as reference only for video and audio characteristics specified in2.4. 2.2 Physical properties of t
48、he tape 2.2.1 Magnetic tape width The width of the magnetic tape shall be8,000mm 0,010mm. 2.2.2 Magnetic tape width fluctuation The fluctuation of the magnetic tape width shall be no more than0,006mm peak-to-peak. 2.2.3 Magnetic tape thickness The thickness of the magnetic tape shall be: 13,04m 1,04
49、m (10,04m 0,84m) (under consideration) Temperature: 20 C 1 C Relative humidity: (50 2)% Air pressure: 86kPa to106kPa Conditioning before testing: 24hEN60843-1:1994 6 BSI 01-2000 2.2.4 Transparency of the magnetic tape The transparency of the magnetic tape for800nm900nm wavelength light shall be less than5%. 2.3 Magnetic properties of the tape The magnetic properties of the magnetic tape, such as coercivity, remanence and magn
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