1、 STD-BSI BS EN bOOSLI-3-ENGL 1777 Lb24bb7 0574342 7b7 I l BRITISH STANDARD Magnetic tape sound recording and reproducing systems Part 3. Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape The European Standard EN 600943 : 1996 including amendme
2、nt A3 : 1996 has the status of a British Standard ICs 33.160.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PEItMlTTED BY COPYRIGHT LAW BS EN 60094-3 : 1997 Inqmtiw amendment A3 : 1996 BS 6288 : Part 3 : 1990 Incqomting IEC 94-3 : 1979 Incorporating amendment 1 : 1980, amendment 2 : 1988 and amendme
3、nt 3 : 1996 amendmt no. 1 : 1996 BS M8 :Part 3 : i990 Renumbered Issue 1, February 1997 BS EN 600943 : 1997 Summary of pages The foilowing table identifies the current issue of each page. Issue 1 indicates that a page has been introduced for the first time by amendment. Subsequent issue numbers indi
4、cate an updated page. Double vertical sideiining on replacement pages indicates the most recent changes (amendment, addition, deletion). Page Front cover Inside front cover b ctof 1 2 3 4 5 6 to 13 a Issue 2 blank 1 blank 1 blank 2 Originai OI-iginal 0I-igh-d 2 Page 14 15 to 20 20a 20b 21 22 23 24 I
5、nside back cover Back cover Issue OI-iginai 2 1 blank 2 2 2 2 Original 2 Change of identifier Wherever BS 6288 : Part 3 : 1990 appears in this standard, it should be read as BS EN 600943 : 1997. O BSI 1997 a Issue 1, February 1997 BS EN 600943 : 1997 Contents page National foreword Inside front colr
6、er Committees responsible Back cover Section one. introduction 1 scope 2 Object 2 2 Section two. Gend notes on measurements 3 Information to be supplied by manufacturer of equipment 2 4 Identification 2 5 Technical description 3 6 Mechanical characteristics 7 Electrical characteristics 8 Rated condi
7、tions 9 Performance claims Section three. Precautions to be taken during measurements 10 Conditions of measurement Section four. Methods of measunment 11 Measurement of mechanical parameters 12 Measurement of electrical parameters Page 3 4 4 6 9 10 15 National foreword This British Standard has been
8、 prepared by Subcommittee EPUIOOM (formerly EEU22) and is the English language version of EN 60094-3 : 1996 Magnetic tape sound recording and reproducing systems Part 3 Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape, including amendment A3
9、: 1996, published by the European Committee for Electrotechnical Standardization (CENELEC). it is identical with IEC 94-3 : 1979 including Amendment 1 : 1980, Amendment 2 : 1988 and Amendment 3 : 1996, published by the International Eiectrotechnical Commission (IEC). Agreement has been given to reta
10、in the cross-reference of this standard as Part 3 of the BS 6288 series for ease of reference in relation to other Parts of the series. This standard supersedes BS 6288 : Part 3 : I982 which has been withdrawn. Additional information. The note to 6.3 contains a mandatory statement and should therefo
11、re be regarded as part of the main text, BS 6288 consists currently of the following Parts: I l Part 1 (BS EN 6OO94-1) Part 2 (BS EN 60094-2) Part 3 (BS EN 60094-3) Part 4 (BS EN 60094-4) Part 5 (BS EN 60094-5) Part 6 Part 7 (BS EN 60094-7) Part 8 Part 9 Part 10 Part 11 Specification for general con
12、ditions and requirements Calibration tapes Methods of measuring the characteristics of recording and reproducing equipment jor sound on magnetic tape Mechanical mgnetic tape properties Electrical magnetic tape properties Specijcation for reel-to-reel systems Specijcation for cassettes for commercial
13、 tape records and domestic use Specification for eight track magnetic tape cartridge for commercial tape records and domestic use Specification for mgnetic tape cartridge for professional use Specification for time and address codes Guide to and address code for compact cassettes OBSI 1997 C Previou
14、s page is blank BS EN 60094-3 : 1997 Issue 1, February 1997 and reproducing equipment Compliance with a British Standard does not of itself confer immunity from legal obligations. d O BSI 1997 STD*BSI BS EN bOOSLI-3-ENGL LYS7 LbilLIbbS 059qLLIb 304 EUROPEAN STANDARD NORME EUR0PEE”E EXJROP Amendment
15、A3 was approved by CENELEC on 19960345. CENELEC members are bound to comply with the CENKENELEC Interrd 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 su
16、ch 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, French, German). A version in any other language made by translation under the responsibiliy of a CENELEC member into its own l
17、anguage and notified to the Centrai Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, Rance, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,
18、 Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariak rue de Stassart 36, B-1060 Brussels O 1996 Copyright reserved to CENELEC members Ref.
19、No. EN 60094-3 : 1996 E STD-BSI BS EN bOOS4-3-ENGL 1777 = Lb24bb7 0599147 240 EN 600943 : 1996 Issue 1, February 1997 Foreword The text of the International Standard IEC 94-3 : 1979 + Al : 1980 + A2 : 1988, prepared by SC 60A (transformed into SC 100B, Recording, of IEC TC 100, Audio, video and mult
20、imedia systems and equipment), was approved by CENELEC as HD 311.3 S2 : 1989 on 1989-0801. As a consequence of the IEGCENELEC Agreement, this Harmonization Document was submitted to the fonnal vote for conversion into a European Standard and was approved by CENELEC as EN 60094-3 on The following dat
21、e was fixed: 1993-12-08. - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1996-12-01 Annexes designated nonnative are part of the body of the standard In this standard, annex ZA is nonnative. Annex ZA has b
22、een added by CENELEC. Foreword to amendment A3 The text of document 60A/177/FDIS, future amendment 3 to iEC 94-3 : 1979, 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
23、approved by CENELEC as amendment A3 to EN 600943 : 1996 on 1S03-05. The following dates were fixed: - iatestdatebywhichthe amendment has to be implemented at national level by publication of an identid national standard or by endorsement (dop) 19961241 - Wst date by which the national standards conf
24、licting with the amendment have to be withdrawn (dow) 19961241 f O BSI 1997 STD-BSI BS EN b0074-3-ENGL 1777 Lb24bb7 057LiL48 187 EN 600943 : 1996 Issue 2, February 1997 MAGNETIC TAPE SOUND RECORDING AND REPRODUCING SYSTEMS Part 3: Methods of measuring the characteristics of recordmg and reproducing
25、equipment for sound on magnetic tape SECTION ONE - INTRODUCTION 1. scope This standard applies to recording and reproducing equipment for sound on magnetic tape (reel-to-reel, cassette and cartridge) for both professional and domestic applications, and will be referred to as “quipment” throughout th
26、is standard. This standard does not apply to special purpose equipment such as high speed duplicators, artificial reverberationrecorders or dictation machines not employing the reel-to-reel, casette or cartridge principle. This standard excludes all aspects of safety, which are to be found in IEC Pu
27、blication 65, Safety Requirements for Mains Operated Electronic and Related Apparatus for Household and Similar General Use. It also excludes magnetic tape properties, which are to be found in IEC Publications 94-4 and 94-5. II 2. Obw The object of this standard is to list and define parameters affe
28、cting the performance of recording and reproducing equipment for sound on magnetic tape, and to establish conditions and agreed methods of measurement of these parameters. SECTION TWO - GENERAL NOTES ON MEASUREMENTS 3. Iafowrition to be supped by manufacturer of equipmeat The information required is
29、 listed in this section. It falls into two distinct categories: - mandatory information to be clearly shown on the equipment, indicated by an “A” on the - optionai information to be given separately, e.g. in an instruction manual relating to and supplied it is essential that mandatory information ou
30、tside the scope of this standard (e.g. aspects of right-hand side of the page; with the equipment. safety - i EC Pubiication 65) shall asso be given in the correct Socation. 4. Id*tion Name of manufacturer or supplier Country of manufacture Model or type number (variants, if any, to be stated) 2 Pre
31、vious page is blank A A 8BSI 1997 STD-BSI BS EN bOOSq-3-ENCL 1997 9 lb24bb9 057q147 013 m BS 6288 : Part 3 : 1990 5. Technical description All parameters in this clause are subject to verification only. For the purpose of this clause, an “adjustable” control shall be deemed to be one that is readily
32、 accessible to the user when the equip- ment is in its intended use. Its adjustment shall necessitate neither relocation of the equipment nor the dismantling of any of its parts. 6. Mechanical characteristics 6.1 6.2 6.3 Space and support requirements during operation of equipment Characteristics Mi
33、nimum height Minimum width Minimum depth Operating position Total mass Units mm mm mm - horizontal, vertical or other kg Tape carrier and tape Units Type of tape carrier (e.g. cassette, cartridge Type of reel (e.g. Type II) Maximum reel diameter without overhang Maximum reel diameter with overhang T
34、ape width or reel-to-reel) Tape transport system mm mm mm Unit Rated speed) cm/s A Note. - On multispeed equipment, the speeds may be marked with the first two digits of the rated speed, e.g. the rated speed of 9.53 cm/s may be shown as “9.5”. For single-speed cassette and cartridge equipment, the s
35、peed need not be marked on the equipment but shall be stated in the instruction manual. Adjustable tape speed on: Record/reproduce. Fast forward. Rewind. Adjustable tape tension: Between capstans. On supply reel. On take-up reel. Number of motors. Type of capstan (e.g. single or multiple capstan). R
36、eversible tape drive (record/reproduce). Type of capstan drive motor(s). 3 STD-BSI BS EN b0074-3-ENGL 1777 = Lb24bb7 0594150 835 M BS 6288 : Part 3 : 1990 Special facilities: Automatic stop. Automatic reverse. Remote start. Remote stop. Cueing/Pause device. Remote fast forward. Remote fast reverse.
37、Adjustable tape path. Capstan drive motor(s) synchronizable to electric power supply frequency. 6.4 Tape heads Combined or separate erase/record/reproduce heads. Combined or separate bias heads. Adjustable azimuth. Adjustable zenith. Adjustable track alignment. Number of tracks. Maximum number of tr
38、acks on intended tape width. Magnetic head material. 7. Electrical characteristics 7.1 Reproducing data Maximum number of simultaneous reproducing channels. Number of reproducing channels. Reproducing characteristic(s) (e .g. I E C). Adjustable gain. Adjustable balance. Adjustable equalization. Type
39、 of noise reduction system. Automatic gain control. 7.2 Recording data Maximum number of simultaneous recording channels. Number of recording channels. Adjustable gain. Adjustable balance. Adjustable equalization. Type of noise reduction system. Automatic gain control. Adjustable bias current. 8. Ra
40、ted conditions For convenience in specifying how tape recorders are to be set up for measurement or verification, it is necessary to define certain rated conditions under which measurements shall be made. Further- more, some of these rated conditions must be related to a specified calibration or ref
41、erence tape. 4 BS 6299 : Part 3 : 1990 The following ratings are basic to the methods of measurement specified in this standard Rated environmental conditions. Rated power supply. Rated recording level. Rated load impedance. Rated source impedance. Rated input electromotive force (e.m.f.). Rated out
42、put voltage. Rated bias setting. To obtain the correct conditions for measurement, the above-mentioned ratings shall be taken from the manufacturers specification. These ratings themselves are not subject to measurement but they constitute the basis for measuring the other characteristics. In order
43、to achieve maximum interchangeability of equipment from different manufacturers, and in order to simplify the work of testing authorities, it is desirable that rated conditions should be standardized so far as is possible. For the guidance of equipment manufacturers, preferred values or ranges are g
44、iven in square brackets following each parameter. 8.1 Rated environmental conditions -5 Ambient temperature Relative humidity Air pressure Minimum stabilization time of equipment al ambient temperature. 8.2 Rated power supply Units Type of supply(ies) (e.g. a.c.) Voltage Frequency (ies) FIEC Publica
45、tion 38* lv 8.3 Interface data Specified calibration tape. Specified reference tape. Manufacturer and identification details of tape housing (cassette and cartridge equipment only). Rated bias setting for specified reference tape. Hz A A A * IEC Standard Voltages. 5 STD-BSI BS EN bODS4-3-ENGL 1777 1
46、b24bb7 0574352 bOB EN 600943 : 1996 Issue 2, February 1997 Units Rated load impedance(s) %* Rated recording level The recording level specified by the manufacturer: The level shall be specified in decibels above or below the level of the level section of the specified calibration tape R dB II Rated
47、output voltages(s) UR V The r.m.s. output voltage across the rated load impedance when reproducing a tape recorded at the rated recording level. This parameter specifies the setting of adjustable reproduce gain controls. - Rated reproducing output voltage U0 V The r.m.s. output voltage across the ra
48、ted load impedance when reproducing the reference level section from the specified calibration tape. This parameter specifies the setting of adjustable reproduce gain controls, if available. . Rated source impedance(s) Ri* R Rated source e.m.f.(s) Vi* mV The r.m.s. source electromotive force in seri
49、es with the rated source impedance which, when recording at the rated bias setting on the specific reference tape, produces a magnetic flux identical to the rated recording level. This parameter specifies the setting of adjustable record gain controls. The performance claimed shall be based on the equipment operating under the rated conditions specified in Clause 8. Unless otherwise specified in Sub-clauses 9-1 or 9.2 (for example maximum or minimum values), a tolerance shall 5e allocated to each parameter. If a manufacturer claims rated power supply voltag
