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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Multimedia Systeme - Leitfaden für empfohlene Charakteristika analoger Schnittstellen zur Erreichung von KompatibilitätSystèmes multimédia - Guide des caractéristiques recommandées des interfaces analogiques permettant d'obtenir l'interopérabilitéMultimedia systems - Guide to the recommended characteristics of analogue interfaces to achieve interoperability (GMT)35.200Vmesniška in povezovalna opremaInterface and interconnection equipment33.160.60WHOHNRQIHUHQFHMultimedia systems and teleconferencing equipmentICS:Ta slovenski standard je istoveten z:EN IEC 61938:2018SIST EN 61938:2019en,fr,de01-april-2019SIST EN 61938:2019SLOVENSKI
STANDARDSIST EN 61938:20131DGRPHãþD
SIST EN 61938:2019
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE 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)
Systèmes multimédia - Guide des caractéristiques recommandées des interfaces analogiques permettant d'obtenir l'interopérabilité (IEC 61938:2018)
Multimedia Systeme - Leitfaden für empfohlene Charakteristika analoger Schnittstellen zur Erreichung von Kompatibilität (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 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 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 the 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, Hungary, 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
Comité Européen de Normalisation Electrotechnique Europäisches Komitee für 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 SIST EN 61938:2019
This document supersedes EN 61938:2013.
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 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 61293:1994 (not modified). IEC 62368-1:2014 NOTE Harmonized as EN 62368-1:2014 (modified). SIST EN 61938:2019
3 Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text 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 been 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 -
IEC 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: Loudspeakers 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 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 connectors 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 - -
SIST EN 61938:2019
SIST EN 61938:2019
IEC 61938 Edition 3.0 2018-01 INTERNATIONAL STANDARD
Multimedia systems –
Guide to the recommended characteristics of analogue interfaces to achieve interoperability
INTERNATIONAL ELECTROTECHNICAL COMMISSION
ICS 33.160.01, 35.200
ISBN 978-2-8322-5056-3
– 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 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 Interconnections . 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/input . 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 . 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 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 supply 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 SIST EN 61938:2019
IEC 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-defined 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 amplifiers . 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 Recommended 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. 31 Annex A (informative)
Pairing and screening of conductors . 32 Annex B (informative)
Phantom power variants for specialized applications . 33 Bibliography . 34
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