1、BSI Standards PublicationSound system equipmentPart 3: AmplifiersBS EN 60268-3:2013National forewordThis British Standard is the UK implementation of EN 60268-3:2013. It is identical to IEC 60268-3:2013. It supersedes BS EN 60268-3:2001 which is withdrawn.The UK participation in its preparation was
2、entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible
3、 for its correct application. The British Standards Institution 2013.Published by BSI Standards Limited 2013ISBN 978 0 580 79790 3 ICS 33.160.10Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Po
4、licy and Strategy Committee on 31 July 2013.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60268-3:2013EUROPEAN STANDARD EN 60268-3 NORME EUROPENNE EUROPISCHE NORM June 2013 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normal
5、isation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60268-3:2013 E ICS 33.160.10 Supersedes EN 60268
6、-3:2000 English version Sound system equipment - Part 3: Amplifiers (IEC 60268-3:2013) Equipements pour systmes lectroacoustiques - Partie 3: amplificateurs (CEI 60268-3:2013) Elektroakustische Gerte - Teil 3: Verstrker (IEC 60268-3:2013) This European Standard was approved by CENELEC on 2013-05-28.
7、 CENELEC members are bound to comply 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
8、 on application to the CEN-CENELEC Management Centre 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 th
9、e CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hu
10、ngary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 60268-3:2013EN 60268-3:2013 - 2 - Foreword The text of document 100/2010A/CDV, future edition
11、 4 of IEC 60268-3, prepared by IEC/TC 100 “Audio, video and multimedia systems and equipment“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60268-3:2013. The following dates are fixed: latest date by which the document has to be implemented at national level by publica
12、tion of an identical national standard or by endorsement (dop) 2014-02-28 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2016-05-28 This document supersedes EN 60268-3:2000. EN 60268-3:2013 includes the following significant technical changes wit
13、h respect to EN 60268-3:2000: rated condition of multi-channel amplifier is expanded; arrangement for the D-class amplifier is added; method of measurement for output power (distortion-limited) is expanded; Annex B is newly added. Attention is drawn to the possibility that some of the elements of th
14、is document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60268-3:2013 was approved by CENELEC as a European Standard without any modification. In the
15、official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60268-5:2003 NOTE Harmonised as EN 60268-5:2003 (not modified). IEC 61606 series NOTE Harmonised in EN 61606 series. BS EN 60268-3:2013- 3 - EN 60268-3:2013 Annex ZA (normative) Normative refere
16、nces to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the lat
17、est edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60065 (mod) + corr. August + A1 (mod) + A2 (mod) 2001 200
18、2 2005 2010 Audio, video and similar electronic apparatus - Safety requirements EN 60065 + corr. August + A1 + A2 + A11 + A12 2002 2007 2006 2010 2008 2011 IEC 60268-1 + A1 + A2 1985 1988 1988 Sound system equipment - Part 1: General HD 483.1 S2 1989 IEC 60268-2 + A1 1987 1991 Sound system equipment
19、 - Part 2: Explanation of general terms and calculation methods HD 483.2 S2 1993 IEC 60417 Data-base Graphical symbols for use on equipment - - IEC 61000-4-13 + A1 2002 2009 Electromagnetic compatibility (EMC) - Part 4-13: Testing and measurement techniques - Harmonics and interharmonics including m
20、ains signalling at a.c. power port, low frequency immunity tests EN 61000-4-13 + A1 2002 2009 IEC 61000-4-17 + A1 + A2 1999 2001 2008 Electromagnetic compatibility (EMC) - Part 4-17: Testing and measurement techniques - Ripple on d.c. input power port immunity test EN 61000-4-17 + A1 + A2 1999 2004
21、2009 IEC 61000-4-29 2000 Electromagnetic compatibility (EMC) - Part 4-29: Testing and measurement techniques - Voltage dips, short interruptions and voltage variations on d.c. input power port immunity tests EN 61000-4-29 2000 IEC 61938 1996 Audio, video and audiovisual systems - Interconnections an
22、d matching values - Preferred matching values of analogue signals EN 61938 + corr. February 1997 1997 BS EN 60268-3:2013 2 60268-3 IEC:2013 CONTENTS 1 Scope . 7 2 Normative references . 7 3 Conditions 8 3.1 Rated conditions and standard measuring conditions 8 3.1.1 Overview 8 3.1.2 Rated conditions
23、8 3.1.3 Standard measuring conditions 9 3.2 Other conditions . 9 4 Classes of operation . 9 5 Interchangeable parts . 10 6 Automatic controls 10 7 Power supply 10 8 Position of the volume controls . 10 9 Pre-conditioning for measurements 11 10 Series of measurements . 11 11 Variable consumption appa
24、ratus . 11 12 Marking 11 13 Operating environment . 12 14 Characteristics to be specified, and their methods of measurement 12 14.1 Power supply characteristics . 12 14.1.1 Characteristics to be specified . 12 14.1.2 Method of measurement 12 14.2 Tolerance of (long-term) power supply voltage variati
25、ons 13 14.2.1 Characteristic to be specified . 13 14.2.2 Methods of measurement 13 14.3 Tolerance of power supply frequency variations 14 14.3.1 Characteristics to be specified . 14 14.3.2 Methods of measurement 14 14.4 Tolerance of power supply harmonics and ripple . 15 14.4.1 Characteristics to be
26、 specified . 15 14.4.2 Methods of measurement 15 14.5 Input characteristics 15 14.5.1 Rated source impedance, characteristic to be specified . 15 14.5.2 Input impedance 15 14.5.3 Rated source e.m.f., characteristic to be specified . 17 14.5.4 Minimum source e.m.f. for rated distortion-limited output
27、 voltage . 17 14.6 Output characteristics 18 14.6.1 Rated load impedance, characteristic to be specified . 18 14.6.2 Output source impedance 18 14.6.3 Output voltage and power (distortion-limited) . 19 14.6.4 Regulation . 20 14.6.5 Overload restoring time . 20 14.7 Limiting characteristics 21 14.7.1
28、 Overload source e.m.f. 21 BS EN 60268-3:201360268-3 IEC:2013 3 14.7.2 Short-term maximum output voltage and power . 21 14.7.3 Long-term maximum output voltage and power 22 14.7.4 Temperature-limited output power . 23 14.8 Characteristics of protection circuits 24 14.8.1 General . 24 14.8.2 Protecti
29、on against potentially damaging combinations of output voltage and current 24 14.8.3 Characteristics of d.c. offset protection circuits 25 14.9 Sustaining-time for rated (distortion-limited) output voltage or power . 26 14.9.1 General . 26 14.9.2 Characteristic to be specified . 27 14.9.3 Method of
30、measurement 28 14.10 Gain . 28 14.10.1 Voltage gain and e.m.f. gain 28 14.10.2 Maximum e.m.f. gain 28 14.10.3 Attenuation characteristic of the volume control . 28 14.10.4 Attenuation characteristic of balance controls for multi-channel equipment . 29 14.11 Response 30 14.11.1 Gain-frequency respons
31、e 30 14.11.2 Gain-limited effective frequency range 30 14.11.3 Distortion-limited effective frequency range 31 14.11.4 Phase-frequency response . 31 14.12 Amplitude non-linearity 31 14.12.1 General 31 14.12.2 Rated total harmonic distortion, characteristic to be specified 31 14.12.3 Total harmonic d
32、istortion under standard measuring conditions . 32 14.12.4 Total harmonic distortion as a function of amplitude and frequency . 32 14.12.5 Harmonic distortion of the nth order under standard measuring conditions 33 14.12.6 Harmonic distortion of the nth order as a function of amplitude and frequency
33、 34 14.12.7 Modulation distortion of the nth order (where n = 2 or n = 3) 34 14.12.8 Difference-frequency distortion of the nth order (where n = 2 or n = 3) 36 14.12.9 Dynamic intermodulation distortion (DIM) 37 14.12.10 Total difference frequency distortion . 39 14.12.11 Weighted total harmonic dis
34、tortion . 40 14.13 Noise . 41 14.13.1 Characteristic to be specified . 41 14.13.2 Method of measurement. 41 14.14 Hum 42 14.14.1 General . 42 14.14.2 Characteristics to be specified . 42 14.14.3 Method of measurement. 42 14.15 Balanced inputs and outputs . 43 14.15.1 Balance of the input 43 14.15.2
35、Overload (distortion-limited) peak-to-peak common-mode input voltage 44 14.15.3 Balance of the output . 44 BS EN 60268-3:2013 4 60268-3 IEC:2013 14.16 Cross-talk and separation in multi-channel amplifiers . 46 14.16.1 Characteristics to be specified . 46 14.16.2 Method of measurement. 46 14.17 Gain
36、and phase differences between channels in multi-channel amplifiers . 47 14.17.1 Gain difference 47 14.17.2 Phase difference 48 14.18 Dimensions and mass, characteristics to be specified 48 Annex A (informative) Balanced interfaces . 56 Annex B (informative) Specification of a multi-channel amplifier
37、. 57 Bibliography 59 Figure 1 Example block diagram for multi-channel amplifier . 49 Figure 2 Arrangements for the Class D amplifier 50 Figure 3 Arrangements for measuring input impedance 51 Figure 4 Oscillogram when measuring overload restoring time . 52 Figure 5 Protection against potentially dama
38、ging combinations of output voltage and current 53 Figure 6 Arrangement for combining two input signals . 54 Figure 7 Frequency spectrum below 30 kHz of the signal for measuring dynamic intermodulation distortion 54 Figure 8 Arrangement for measuring the balance of a balanced input 55 Figure 9 Arran
39、gement for measuring the internal impedance balance of a balanced output . 55 Figure 10 Arrangement for measuring the voltage symmetry of a balanced output . 55 Figure B.1 Block diagram for a 5.1 channel surround amplifier . 57 Figure B.2 Block diagram for a 5 channel surround amplifier 58 Table 1 D
40、ifferent rated total harmonic distortion and rated distortion-limited output power specifications for the same amplifier . 27 Table 2 Distortion components due to dynamic intermodulation distortion falling in the frequency range up to 20 kHz . 38 BS EN 60268-3:201360268-3 IEC:2013 7 SOUND SYSTEM EQU
41、IPMENT Part 3: Amplifiers 1 Scope This part of IEC 60268 applies to analogue amplifiers, and the analogue parts of analogue/digital amplifiers, which form part of a sound system for professional or household applications. It specifies the characteristics which should be included in specifications of
42、 amplifiers and the corresponding methods of measurement. NOTE The methods of measurement for digital amplifiers and similar equipment are given in IEC 61606 41. In general, the specified methods of measurement are those which are seen to be most directly related to the characteristics. This does no
43、t exclude the use of other methods which give equivalent results. In general, the methods are based on the simplest measuring equipment which can provide useful results. This does not exclude the use of more complex equipment which can give higher accuracy and/or allow automatic measurement and reco
44、rding of results. Rated conditions and standard measuring conditions are specified in order to allow measurements to be reliably repeated. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For d
45、ated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60065:2001, Audio, video and similar electronic apparatus Safety requirements Amendment 1:2005 Amendment 2:2010 IEC 60268-1:1985, Sound syste
46、m equipment Part 1: General Amendment 1:1988 Amendment 2:1988 IEC 60268-2:1987, Sound system equipment Part 2: Explanation of general terms and calculation methods Amendment 1:1991 IEC 60417, Graphical symbols for use on equipment. Available from: http:/www.graphical-symbols.info/equipment IEC 61000
47、-4-13:2002, Electromagnetic compatibility (EMC) Part 4-13: Testing and measurement techniques Harmonics and interharmonics including mains signalling at a.c. power port, low frequency immunity tests Amendment 1:2009 1Numbers in square brackets refer to the Bibliography. BS EN 60268-3:2013 8 60268-3
48、IEC:2013 IEC 61000-4-17:1999, Electromagnetic Compatibility (EMC) Part 4-17: Testing and measurement techniques Ripple on d.c. input power port immunity test Amendment 1:2001 Amendment 2:2008 IEC 61000-4-29:2000, Electromagnetic Compatibility (EMC) Part 4-29: Testing and measurement techniques Volta
49、ge dips, short interruptions and voltage variations on d.c. input power ports immunity tests IEC 61938:1996, Audio, video and audiovisual systems Interconnections and matching values Preferred matching values of analogue signals 3 Conditions 3.1 Rated conditions and standard measuring conditions 3.1.1 Overview For convenience in specifying how amplifiers shall be set up for measurement, sets of conditions are specified in this standard, under the t
