《BS-EN-60961-1994 IEC-60961-1993.pdf》由会员分享，可在线阅读，更多相关《BS-EN-60961-1994 IEC-60961-1993.pdf（70页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS EN 60961:1994 IEC 961:1993 Specification for Helical-scan video tape cassette system using 12.65 mm (0.5 in) magnetic tape on type L The European Standard EN 60961:1994 has the status of a British Standard UDC 621.397.454 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:
2、19:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60961:1994 This British Standard, having been prepared under the direction of the Electronic Equipment Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 July 1994 BSI 01-2000 The fol
3、lowing BSI references relate to the work on this standard: Committee reference EEL/22 Draft for comment 89/25034 DC ISBN 0 580 23392 8 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, compris
4、es the national committees of the following countries: AustriaItaly BelgiumLuxembourg DenmarkNetherlands FinlandNorway FrancePortugal GermanySpain GreeceSweden IcelandSwitzerland IrelandUnited Kingdom Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na
5、, Sat Nov 11 09:19:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60961:1994 BSI 01-2000i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 Text of EN 609615 National annex NA (informative) Committees responsibleInside back cover National annex NB (informat
6、ive) Cross-referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:19:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60961:1994 ii BSI 01-2000 National foreword This British Standard has been prepared under the direction of the Electronic Equipment Standards Policy
7、 Committee and is the English language version of EN 60961:1994 Helical-scan video tape cassette system using 12,65 mm (0,5 in) magnetic tape on type L, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 961:1993 published by the Internationa
8、l Electrotechnical Commission (IEC). This standard supersedes BS 7260:1989, which is withdrawn. Copies of CCIR documents may be purchased from Customer Services, Publications, BSI, Linford Wood, Milton Keynes MK14 6LE. A British Standard does not purport to include all the necessary provisions of a
9、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, pages i and ii, the EN title page, pages 2
10、to 64, 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. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:19:38 GMT+00:00 2006, Uncontr
11、olled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60961 February 1994 UDC 621.397.454 Descriptors: Electroacoustics, electroacoustic equipment, video recording, magnetic recording, video tape recorders, magnetic tapes, cassette for magnetic tapes, recording characteristics, me
12、chanical properties, electrical properties, dimensions English version Helical-scan video tape cassette system using 12,65 mm (0,5 in) magnetic tape on type L (IEC 961:1993) Systme de magntoscope cassette balayage hlicodal utilisant la bande magntique de 12,65 mm (0,5 in) de format L (CEI 961:1993)
13、Video-Bandkassettensystem mit Schrgspuraufzeichnung auf Magnetband 12,65 mm (0,5 in) L-Format (IEC 961:1993) This European Standard was approved by CENELEC on 1993-12-08. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Euro
14、pean 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 any CENELEC member. This European Standard exists in three official versions (Eng
15、lish, 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 versions. CENELEC members are the national electrotechnical committees of Austria,
16、 Belgium, 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
17、fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1994 Copyright reserved to CENELEC members Ref. No. EN 60961:1994 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:19:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60961:1994 BSI 01-2000 2 Foreword Th
18、e text of document 60B(CO)152, as prepared by Subcommittee 60B: Video recording of IEC Technical Committee 60: Recording, was submitted to the IEC-CENELEC parallel vote in April 1993. The reference document was approved by CENELEC as EN 60961 on 8 December 1993. The following dates were fixed: Annex
19、es designated “normative” are part of the body of the standard. Annexes designated “informative” are given only for information. In this standard, Annex A and Annex B are informative and Annex ZA is normative. Contents Page Foreword2 Section 1. General 1Scope5 2Normative references5 3Environment and
20、 test conditions5 3.1Environment5 3.2Reference tape5 3.3Calibration tape5 Section 2. Video tape and video tape cassette Section 3. Video cassette recorders 4Definitions of terms6 4.1Scanner6 4.2Drum6 4.3Upper drum6 4.4Lower drum6 4.5Effective drum diameter7 4.6Helix angle7 4.7Track angle7 4.8Centre
21、span tension7 4.9Wrap angle7 4.10 Lead signal overlap7 5Scanner pole-tips7 5.1Pole-tip projection7 5.2Luminance pole-tips7 5.3Colour-recording pole-tips7 5.4Erase pole-tips7 5.5Channel identification7 6Helix angle8 7Drum diameter and tape tension8 7.1Actual upper drum diameter8 7.2Actual lower drum
22、diameter8 7.3Upper drum8 7.4Centre span tension8 8Dimensions and location of records8 8.1Test environment8 8.2Tape speed8 8.3Recording locations and dimensions8 8.4Curvature of video recordings9 8.5Relative positions of recorded signals9 8.6Gap azimuth9 9Luminance and colour-recording system9 10Reco
23、rding characteristics9 latest date of publication of an identical national standard(dop) 1994-12-01 latest date of withdrawal of conflicting national standards(dow) 1994-12-01 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:19:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60961:1994 BSI
24、 01-20003 Page Section 4. Recording characteristics 11Video recording9 11.1 Luminance channel9 11.2 Chrominance channel11 11.3 Decoding and colour-field identification13 12Longitudinal audio signal recording (channels 1 and 2)13 12.1 Reference levels13 12.2 Frequency response13 12.3 Track usage14 13
25、FM audio signal recording (channels 3 and 4)15 13.1 Signal processing15 13.2 Reference levels15 13.3 Noise reduction15 13.4 Frequency modulation15 13.5 Recording current16 13.6 Track usage16 14Time and control code recording16 14.1 Designated track for time and control code16 14.2 Recording method16
26、 15Tracking control recording16 15.1 Tracking control signal16 15.2 Tracking control and video timing16 15.3 Recording method16 Section 5. Type-L format video tape and video tape cassette 16Mechanical characteristics of video tape cassette17 16.1 Cassette outside dimensions17 16.2 Datum planes17 16.
27、3 Window area and label area17 16.4 Manufacturers identification holes17 16.5 Safety tab and safety plug17 16.6 Reel18 16.7 Cassette lid18 17Magnetic tape18 17.1 Type of magnetic tape18 17.2 Tape width18 17.3 Tape thickness and length19 17.4 Coercivity19 17.5 Transmissivity19 17.6 Offset yield stren
28、gth19 17.7 Residual elongation19 17.8 Magnetic orientation19 Page 18Leader tape/trailer tape19 18.1 Mechanical characteristics19 18.2 Leader tape and trailer tape dimensions19 18.3 Offset yield strength20 18.4 Splicing break strength20 Annex A (informative) Cross tape track measurement technique60 A
29、nnex B (informative) Reference tapes62 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications63 Figure 1 Top view of scanner pole-tips22 Figure 2 Drum diameters and side view of scanner pole-tips23 Figure 3 Record locat
30、ions and dimensions24 Figure 4a Video record location (525 line-60 field)25 Figure 4b Video record location (625 line-50 field)25 Figure 5a Wave-form of modified luminance signal (525 line-60 field)26 Figure 5b Wave-form of modified luminance signal (625 line-50 field)27 Figure 6 Pre-emphasis networ
31、k28 Figure 7a Wave-form of compressed R-Y and B-Y signals (525 line-60 field)29 Figure 7b Wave-form of compressed R-Y and B-Y signals (625 line-50 field)30 Figure 8 Time compression and multiplexing system31 Figure 9a Field identification signal (525 line-60 field)31 Figure 9b Field identification s
32、ignal (625 line-50 field)32 Figure 10a Tracking control wave-form and timing (525 line-60 field)32 Figure 10b Tracking control wave-form and timing (625 line-50 field)33 Figure 11 Y and C track recording current34 Figure 12 The LF amplitude of chrominance FM signal35 Figure 13a VISC signal (525 line
33、-60 field)36 Figure 13b VISC signal (625 line-50 field)37 Figure 14 FM audio noise reduction system38 Figure 15 FM audio noise reduction transient response characteristics39 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:19:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60961:1994 BSI 0
34、1-2000 4 Page Figure 16 Appearance of video cassette Top and side view40 Figure 17 Appearance of video cassette Bottom view41 Figure 18a Datum spots and supported areas42 Figure 18b Tape guide43 Figure 19 Location of cassette reels in the recorder and/or player44 Figure 20 Protecting lid of cassette
35、45 Figure 21 Cassette reel46 Figure 22 Relationship between reels and reel spindles47 Figure 23 Allowable and operating ranges for unlocking the lever of cassette lid48 Figure 24 Force needed to open the lid49 Figure 25 Appearance of video cassette Top and side view50 Figure 26 Appearance of video c
36、assette Bottom view51 Figure 27a Datum spots and supported areas52 Figure 27b Tape guide53 Figure 28 Location of cassette reels in the recorder and/or player54 Figure 29 Protecting lid of cassette55 Figure 30 Cassette reel56 Figure 31 Relationship between reels and reel spindles57 Figure 32 Allowabl
37、e and operating ranges for unlocking the lever of cassette lid58 Figure 33 Force needed to open the lid59 Table 1 Detail enhancement output (dB)10 Table 2 Amplitude clipping (luminance)10 Table 3 Recorded carrier frequency (luminance)11 Table 4 Amplitude clipping (chrominance)12 Table 5 Recorded car
38、rier frequency (chrominance)12 Table 6 Audio noise reduction encoding characteristics (dB)14 Table 7 Record locations and dimensions21 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:19:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60961:1994 BSI 01-20005 Section 1. General 1 Scope This
39、 International Standard applies to magnetic video recording and/or reproduction using 12,65 mm (0,5 in) tape cassettes on helical-scan video cassette recorders suitable for broadcast applications. This standard specifies two recording modes. MODE I uses oxide particle tape, MODE II uses metal partic
40、le tape and permits frequency modulated (FM) audio signals to be recorded. The standard defines the electrical and mechanical characteristics of equipment which will provide for interchangeability of recorded cassettes. The requirements given are related to 525 line-60 field and/or 625 line-50 field
41、 systems. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parti
42、es to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 94-1:1981, Magnetic tape soun
43、d recording and reproducing systems Part 1: General conditions and requirements. IEC 268-17:1990, Sound system equipment Part 17: Standard volume indicators. IEC 461:1986, Time and control code for video tape recorders. IEC 767:1983, Helical-scan video tape cassette system using 12,65 mm (0,5 in) ma
44、gnetic tape on type beta format. CCIR Report 624-4, Characteristics of television systems. 3 Environment and test conditions 3.1 Environment Test and measurement made on the system to check the requirements of this standard shall be carried out under the following conditions. 3.2 Reference tape Blan
45、k tape to be used for reference recordings may be purchased from the manufacturers listed in Annex B. The electromagnetic compatibility parameters and their specifications should be specified by the manufacturers and controlled accordingly. Model name: a) IEC L-format reference tape for MODE I; b) I
46、EC L-format reference tape for MODE II. Electromagnetic compatibility parameters and their specifications are indicated in Annex B. 3.3 Calibration tape Calibration tapes which have satisfied the following requirements will be available from manufacturers of video tape recorders and players in accor
47、dance with this format specification. Temperature (drum diameter):20 C 0,5 C Temperature (all other tests):20 C 1 C Relative humidity:48 % to 52 % Barometric pressure:86 kPa to 106 kPa Conditioning before testing:24 h Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:19:38 GMT+00:00 2006, Un
48、controlled Copy, (c) BSI EN 60961:1994 6 BSI 01-2000 3.3.1 Record locations and dimensions For calibration tapes intended for the purpose of calibrating the mechanical accuracy of the recorder or player, in accordance with this format specification, a 50 % reduction in the tolerances shown in Table
49、7 should, in general, be applied. If necessary, the record locations and dimensions can be specially modified for certain calibration tapes in order to avoid calibration error or to aid calibration. 3.3.2 Calibration signals Two classes of signals should be recorded on the calibration tapes: a) a series of conventional test signals for analogue component video tape recorders b) special test signals developed by each manufacturer for product