1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Multimedia systems - Guide to the recommended characteristics of analogue interfaces to achieve interoperability (GMT)BS EN IEC 61938:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IEC 61938 March 2018 ICS 33.
2、160.01; 35.200 Supersedes EN 61938:2013 English Version Multimedia systems - Guide to the recommended characteristics of analogue interfaces to achieve interoperability (IEC 61938:2018) Systmes multimdia - Guide des caractristiques recommandes des interfaces analogiques permettant dobtenir linteropr
3、abilit (IEC 61938:2018) Multimedia Systeme - Leitfaden fr empfohlene Charakteristika analoger Schnittstellen zur Erreichung von Kompatibilitt (IEC 61938:2018) This European Standard was approved by CENELEC on 2018-02-16. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations w
4、hich 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 CEN-CENELEC Management Centre or to any CENELEC member. T
5、his 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 CEN-CENELEC Management Centre has the same status as the official versions. CE
6、NELEC 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Nether
7、lands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Manage
8、ment Centre: Rue de la Science 23, B-1040 Brussels 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN IEC 61938:2018 E National forewordThis British Standard is the UK implementation of EN IEC 61938:2018. It is identical to IEC 61
9、938:2018. It supersedes BS EN 61938:2013, which will be withdrawn on 16 February 2021.The UK participation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment.A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 reque
10、st to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 95887 8ICS 33.160.01; 35.200; 33.160.60Complian
11、ce with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN IEC 61938:2018EUROPEA
12、N STANDARD NORME EUROPENNE EUROPISCHE NORM EN IEC 61938 March 2018 ICS 33.160.01; 35.200 Supersedes EN 61938:2013 English Version Multimedia systems - Guide to the recommended characteristics of analogue interfaces to achieve interoperability (IEC 61938:2018) Systmes multimdia - Guide des caractrist
13、iques recommandes des interfaces analogiques permettant dobtenir linteroprabilit (IEC 61938:2018) Multimedia Systeme - Leitfaden fr empfohlene Charakteristika analoger Schnittstellen zur Erreichung von Kompatibilitt (IEC 61938:2018) This European Standard was approved by CENELEC on 2018-02-16. CENEL
14、EC 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 on ap
15、plication 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 the CEN-
16、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, Hungary,
17、 Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotec
18、hnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN IEC 61938:2018 E BS EN IEC 61938:2018EN IEC 61938:2018
19、 (E) 2 European foreword The text of document 100/2879/CDV, future edition 3 of IEC 61938, 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 IEC 61938:2018. The following dates are fixed: latest dat
20、e by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2018-11-16 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2021-02-16 This document supersedes EN 61938:2013.
21、Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 61938:2018 was approved by CENELEC
22、as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60027 (series) NOTE Harmonized as EN 60027 (series). IEC 60130-9 NOTE Harmonized as EN 60130-9. IEC 61293:1994 NOTE Harmonized as EN 61293
23、:1994 (not modified). IEC 62368-1:2014 NOTE Harmonized as EN 62368-1:2014 (modified). BS EN IEC 61938:2018EN IEC 61938:2018 (E) 3 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents are referred to in the text
24、 in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 Where an International Publication has be
25、en modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 60038 - IEC standard voltages EN 60038 - I
26、EC 60094-2 - Magnetic tape sound recording and reproducing systems - Part 2: Calibration tapes EN 60094-2 - IEC 60268-1 - Sound system equipment - Part 1: General HD 483.1 S2 - IEC 60268-3 - Sound system equipment - Part 3: Amplifiers EN 60268-3 - IEC 60268-5 - Sound system equipment - Part 5: Louds
27、peakers EN 60268-5 - IEC 60268-7 2010 Sound system equipment - Part 7: Headphones and earphones EN 60268-7 2011 IEC 60268-11 1987 Sound system equipment - Part 11: Application of connectors for the interconnection of sound system components HD 483.11 S1 1990 + A1 1989 HD 483.11 S2 1991 + A2 1991 HD
28、483.11 S3 1993 IEC 60268-12 - Sound system equipment - Part 12: Application of connectors for broadcast and similar use EN 60268-12 - IEC 60603-11 1992 Connectors for frequencies below 3 MHz for use with printed boards - Part 11: Detail specification for concentric connectors (dimensions for free co
29、nnectors and fixed connectors) - - IEC 60958 series Digital audio interface EN 60958 series ITU-R BT.1700 2005 Characteristics of composite video signals for conventional analogue television systems - - BS EN IEC 61938:2018This page deliberately left blank 2 IEC 61938:2018 IEC 2018 CONTENTS FOREWORD
30、 . 5 INTRODUCTION . 7 1 Scope 8 2 Normative references 10 3 Terms and definitions 10 4 General conditions . 13 5 Power supply . 13 5.1 Alternating current (AC) power supply voltages and frequencies 13 5.2 Direct current (DC) power supply voltages 14 5.3 Power supply feed for microphones 14 6 Interco
31、nnections 14 6.1 Connections 14 6.1.1 General . 14 6.1.2 Characteristics of cables . 14 6.2 Connectors . 16 7 Marking and symbols for marking 16 7.1 Marking . 16 7.2 Symbols for marking . 16 8 Electrical recommended values 16 8.1 General purpose output/input . 16 8.2 General purpose audio output/inp
32、ut 16 8.2.1 Audio-only interfaces for consumer equipment . 16 8.2.2 Interfaces for professional equipment and consumer equipment where audio and video signals are present on the same connector or cable . 17 8.3 General purpose video input/output 19 9 Interoperability of microphones and amplifiers .
33、19 9.1 Microphones (excluding piezoelectric types) . 19 9.2 Power supply feed for electret microphones fed over a signal conductor (“plug-in power”) . 20 9.3 Power supply feed for electret microphones fed by a separate conductor (“soundcard power“ or “PC power“) 21 9.4 Phantom supply system 21 9.4.1
34、 General . 21 9.4.2 Supply voltage polarity 21 9.4.3 Circuit diagram 22 9.4.4 Value of the supply voltage . 22 9.4.5 Supply current . 22 9.4.6 Marking . 22 9.5 A-B supply system 23 9.5.1 General . 23 9.5.2 Output impedance of the microphone 23 9.5.3 Circuit diagram 23 9.5.4 Connection of the power s
35、upply to earth . 23 9.5.5 Marking . 23 9.6 Polarity of the audio frequency voltage . 23 10 Interoperability of record-playing units (pick-ups) and amplifiers 25 2 IEC 61938:2018 IEC 2018 CONTENTS FOREWORD . 5 INTRODUCTION . 7 1 Scope 8 2 Normative references 10 3 Terms and definitions 10 4 General c
36、onditions . 13 5 Power supply . 13 5.1 Alternating current (AC) power supply voltages and frequencies 13 5.2 Direct current (DC) power supply voltages 14 5.3 Power supply feed for microphones 14 6 Interconnections 14 6.1 Connections 14 6.1.1 General . 14 6.1.2 Characteristics of cables . 14 6.2 Conn
37、ectors . 16 7 Marking and symbols for marking 16 7.1 Marking . 16 7.2 Symbols for marking . 16 8 Electrical recommended values 16 8.1 General purpose output/input . 16 8.2 General purpose audio output/input 16 8.2.1 Audio-only interfaces for consumer equipment . 16 8.2.2 Interfaces for professional
38、equipment and consumer equipment where audio and video signals are present on the same connector or cable . 17 8.3 General purpose video input/output 19 9 Interoperability of microphones and amplifiers . 19 9.1 Microphones (excluding piezoelectric types) . 19 9.2 Power supply feed for electret micro
39、phones fed over a signal conductor (“plug-in power”) . 20 9.3 Power supply feed for electret microphones fed by a separate conductor (“soundcard power“ or “PC power“) 21 9.4 Phantom supply system 21 9.4.1 General . 21 9.4.2 Supply voltage polarity 21 9.4.3 Circuit diagram 22 9.4.4 Value of the suppl
40、y voltage . 22 9.4.5 Supply current . 22 9.4.6 Marking . 22 9.5 A-B supply system 23 9.5.1 General . 23 9.5.2 Output impedance of the microphone 23 9.5.3 Circuit diagram 23 9.5.4 Connection of the power supply to earth . 23 9.5.5 Marking . 23 9.6 Polarity of the audio frequency voltage . 23 10 Inter
41、operability of record-playing units (pick-ups) and amplifiers 25 BS EN IEC 61938:2018IEC 61938:2018 IEC 2018 3 11 Interoperability of loudspeakers and amplifiers 26 11.1 Single unit loudspeakers . 26 11.2 Loudspeaker systems . 26 11.2.1 Loudspeakers with built-in amplifier . 26 11.2.2 Impedance-defi
42、ned loudspeaker systems 26 11.2.3 Constant voltage loudspeaker systems 27 11.3 Voltage (or power) interoperability of amplifiers and loudspeakers . 27 11.3.1 Overview . 27 11.3.2 Interoperability requirements . 27 11.4 Polarity of the sound pressure 28 12 Interoperability of headphones and amplifier
43、s 28 12.1 General . 28 12.2 Interoperability of headphones with stationary amplifiers 28 12.3 Interoperability of portable audio headphones/earphones and portable audio equipment . 29 12.3.1 General . 29 12.3.2 Portable audio headphones/earphones 29 12.3.3 Portable audio equipment 29 12.3.4 Recommen
44、ded values and input/output values for portable audio headphones/earphones and portable audio equipment 29 13 Interoperability of amplifiers with other amplifiers. 30 13.1 Pre-amplifiers and power amplifiers for general purpose and sound reinforcement 30 13.2 Broadcast and similar line amplifiers. 3
45、1 Annex A (informative) Pairing and screening of conductors 32 Annex B (informative) Phantom power variants for specialized applications . 33 Bibliography 34 Figure 1 Audio and video sources and destinations . 9 Figure 2 Example of plug-in power system for a single microphone . 23 Figure 3 Example o
46、f plug-in power system for a two-channel microphone . 24 Figure 4 Example of soundcard power system . 24 Figure 5 Example of phantom power supply system 24 Figure 6 Example of A-B power supply system 25 Figure B.1 Caution symbol . 33 Table 1 Direct current (DC) power supply voltages and tolerances 1
47、4 Table 2 General purpose values for audio-only interfaces 16 Table 3 General purpose values for audio signals for professional interfaces . 18 Table 4 General purpose recommended values for video signals 19 Table 5 Recommended values for microphones and amplifiers 20 Table 6 Required values for pha
48、ntom supply systems . 25 Table 7 Required values for A-B power supply systems 25 Table 8 Recommended values for analogue record-playing units and amplifiers 25 Table 9 Recommended values for impedance-defined loudspeaker systems 26 Table 10 Recommended values for constant voltage loudspeaker systems
49、 27 BS EN IEC 61938:2018 4 IEC 61938:2018 IEC 2018 Table 11 Recommended values for headphones and amplifiers in stationary applications 28 Table 12 Recommended values for portable audio headphones/earphones and portable audio equipment . 29 Table 13 Recommended values for pre-amplifiers and power amplifiers 31 Table 14 Recommended values for broadcast and similar line amplifiers 31 BS EN IEC 61938:2018IEC 61938:2018 IEC 2018 5 INTERNATIONAL ELECTROTECHNICAL C
