1、 CENELEC EN*b1305-3 95 3404583 0363782 117 Household high-fidelity audio equipment and systems - Methods of measuring and specifying the performance Part 3. Amplifiers The European Standard EN 61305-3 : 1995 has the status of a British Standard BS EN 61305-3 : 1995 EC 1305-3 : 1995 Fg u- CENELEC EN*
2、bl1305-3 95 3404583 0363783 O53 M BS EN 61305-3 : 1995 This British Standard, having been prepared under the direction of the Electrotechnicd Sector Board, was published under the authority of the Standards Board and comes into effect on 15 December 1995 O BSI 1995 Committees responsible for this Br
3、itish Standard The preparation of this British Standard was entrusted to Technical Committee EPUM, Equipment and systems in the field of audio, video and audiovisual engineering, upon which the following bodies were represented: Association of British Theatre Techniques Audio Engmeering Society Brit
4、ish Broadcasting Corporation British Educational Supplies Association British Fire Protection Systems Association Limited British Kinematograph, Sound and Television Society British Radio and Electronic Equipment Manufacturers Association British Telecommunications plc Consumers Association Federati
5、on of British Audio Federation of the Electronics Industry Independent Television Association institution of Electrical Engineers International Association of Broadcasting Manufacturers National Council for Educational Technology (NCET) Professional Lighting and Sound Association Radio Electrical an
6、d Televicion Retailers Association Royal Institute of British Architects Royal National Institute for Deaf People Society of Cable Television Engineers Amendments issued since publication Arnd. No. I Date I Text affected The following BSI references relate to the work on this standard Committee refe
7、rence EPU4 Draft for comment 92/26953 DC ISBN O 580 24972 7 CENELEC EN*bL305-3 95 3404583 0363784 T9T BS EN 613053 : 1996 Contents Committees responsible National foreword page Inside front cover ii Foreword Text of EN 61305-3 2 3 i BS EN 613063 : 1995 National foreword This British Standard has bee
8、n prepared by Technical Committee EPUM and is the English language version of EN 613053 : 1995 Household highzfielity audio equipment and systems - Methods of naeasuring and spkfng the pe?frmume Part 3: Amplif-, published by the European Committee for Electrotechnical Standardizaton (CENELEC). It is
9、 identical with IEC 1305-3 : 1995, published by the International Electrotechnical Commission WC). EN 61305 consists of the folowing Parts: Part 1 General Part 21) mdw tuners Part3 Amplifiers Cross-references Publication referred to HD 483.1 S2 : 1989 HD 483.3 s2 : 1992 EN 60958 : 1990 EN 61305-1 :
10、1995 (IEC 1305-1 : 1995) (IEC 268-1 : 1985) (IEC 268-3 : 1988) (IEC 958 : 1989) Corresponding British Standard BS 6840 Sound system equipment Part 1 : 1987 Methods for specifying and meclsuring general chamterst.ics used for equipment pence Part 3 : 1992 Methods for specifying and measuring the cham
11、terstics of sound system amplifiers BS EN 60958 : 1995 Sfkath for digital audw inkr$xe BS EN 61305 Household highfsity audw equipment and systems -Methods of rneusuring and spdmng the per$nce Part 1 : 1995 General2) Compliance with a British Standard does not of itself confer immunity from legal obl
12、igations. 1) In preparation. 2, The footnote to ciause i is no longer applicable. I - - CENELEC ENabI1305-3 95 I 3404583 0163786 862 . EUROPEAN STANDARD NORME EuROPJ?E“E EUROPmHE NORM EN 613053 July 1995 ICs 33.160.10 Descriptors: electroacoustic equipment, high fidelity systems, audio amplifiers, c
13、haracteristics, measurements, testing conditions Eh version Household high-fidelity audio equipment and system Methods of measuring and specmg the performance Part 3: Amplifiers (IEC 13053 : 1995) Equipements et systmes audio grand public haute fidlit Mthodes pour mesurer et spcifier les performance
14、s Teil3 Verstrker Partie 3 Ampiificateurs (CEI 1305-3 : 1995) Hifi-Gerte und Anlagen fur den Heimgebrauch Verfahren zur Messung und Angabe der Leistungskennwerte (EC 1305-3 : 1995) This European Standard was approved by CENELEC on 1995-07-04. CENELEC members are bound to comply with the CENKENELEC I
15、nted Regulations which stipuiate 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 Secretariat or to any CENELEC m
16、ember. 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 as the official versions. CENE
17、LEC 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 United Kingdom. CENELEC European Committee for Electrotechnical Standardization
18、Comit Europen de Normalisaton Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 36, B-1060 Brussels O 1995 Copyright reserved to CENELEC members Ref. No. EN 613053 : 1995 E CENELEC EN*b3305-3 95 I 3Lt04583 0363787 7T W Page 2 EN 613053 : 1995 Fore
19、word The text of document 84/397/DIS, future edition 1 of IEC 13053, prepared by IEC TC 84, Equipment and systems in the field of audio, video and audiovisual engineering, was submitted to the IEC-CENELEC paraliel vote and was approved by CENELEC as EN 61305-3 on 199507-04. The following dates were
20、x - for equalizing inputs, f 2 dB. 3.2 Gain difference between channels According to IEC 268-3, 29.1. The highest value between 250 Hz and 6.3 kHz, for any position of the volume control from maximum to that giving 46 dB attenuation shall be given. Any balance control shall be set at the mechanical
21、centre position. 3.3 Total harmonic distortion According to IEC 268-3, 22.4. The most unfavourable value, at any frequency from 63 Hz to 12,s kHz, at any level from 1 dB below the rated (distortion- limited) output power or voltage, to -30 dB or 50 mW, whichever is lower, shall be given. 3.4 Distort
22、ion-limited effective frequency range The frequencies shall be given at which the output power or voltage giving a stated value of total harmonic distortion is 3 dB below the rated (distortion- limited) output power or voltage. According to IEC 268-3, 21.3. For multi-channel equipment, where the cha
23、nnels have similar effective frequency ranges and rated output voltages, all channels shall be driven so as to produce approximately the same output. Where the channels differ in characteristics, they shall be driven, if necessary, with signals of different CENELEC EN*b2305-3 75 111 3404583 0263770
24、293 Page 5 EN 61305-3 : 1995 frequency, so as to produce approximately the same output level relative to their rated output voltages or powers. 3.5 Rated (distortion- limited) output voltage or power, measured after 600 s, at the rated value of total harmonic distortion (.e. that specified by the ma
25、nufacturer). 3.6 Maximum output voltage and current 3.7 Overload source e.m.f. The values at which the rated total harmonic distortion is not exceeded shall be given. 3.8 Separation between stereo channels The most unfavourable value, measured over the frequency range 250 Hz to 6,3 kHz, and for any
26、position of the volume control from maximum to that giving 46 dB attenuation, shall be given. 3.9 Cross-talk between unrelated channels The measurements shall be made at frequencies between 1 kHz and 1 O kHz. The most unfavourable values, specified as in 3.8, shall be given for each pair of unrelate
27、d inputs, and between each input and any low-level outputs (such as those for recording). According to IEC 268-3, 18.3. If the manufacturer specifies a sustaining time for rated output power or voltage less than 600 s, the measurement shall be made after that time. According to IEC 268-3, amendment
28、1, 19.5. According to IEC 268-3, 19.1. According to IEC 268-3, clause 28. According to IEC 268-3, clause 28. CENELEC ENwb1305-3 95 I 3404583 0363791 L2T I Page 6 EN 61305-3 : 1996 3.1 O Unweighted (band-limited) signal- to-noise ratio expressed in decibels For amplifiers without volume control, the
29、reference (O dB) level shall be the rated output voltage or power. For amplifiers with volume controls, measurements shall be made with the volume control in the position for rated conditions (see IEC 268-3 3.2.2 and clause lo), and in the position giving a further 30 dB of attenuation. The referenc
30、e level for the result of the latter measurement is 30 dB below the rated output voltage or power. The more unfavourable value shall be given. According to IEC 268-3, clause 23. using the wide-band filter specified in 6.1 of IEC 268-1 and the true r.m.s. meter specified in 6.2.1 of IEC 268-1. The co
31、ntrols shall be set to give the widest possible flat frequency response. 3.1 1 A-weighted signal-to-noise ratio, expressed in decibels The procedures specified in 3.1 O shall be used. As for 3.10, but using the A-weighting filter and true r.m.s. meter specified in IEC 268-1, 6.2.1. 3.12 Distortion a
32、nd noise of digital inputs According to 4.1 2 of document 84(Secretariat)303, the three signai levels FS, FS-30 dB and FS-60 dB shall be used. 4 Contents of specifications 4.1 Comprehensive specifications Comprehensive specifications shall contain, at least, information on the characteristics given
33、in 3.1, 3.3, 3.5, 3.8, 3.9 and 3.11. Basic methods of measurement of tho audio characteristics of digital audio and the digirar audio part of audio Fax: O181 996 7048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price o
34、f standards. For details of these and other benefits contact Customer Services, Membership at Chiswick Tel 0181 996 7002; Fax: O181 996 7001. Copyright Copyright subsists in all BSI publications and no part may be reproduced in any form without the prior permission in writing of BSI. This does not p
35、reclude the free use, in the course of implementing the standard of necessary details such as symbols and size, type or grade designations including use by incorporation into computer programs, but where these details are reproduced including without hitation in printed form, in computer programs or
36、 in any other form whatsoever, the permission in writing of BSI must be obtained and if granted wiU be on terms includmg royalty, before the product is sold, licensed or otherwise exploited for commercial gain. Enquiries about copyright should be made to the Copyright Manager at Chiswick. ISBN O 580 24972 7 Product code 00633130 EPI4
