Audio, video and related equipment - Determination of power consumption - Part 6: Audio equipment

IEC 62087-6:2015(E) specifies the determination of the power consumption of audio equipment for consumer use. The various modes of operation which are relevant for measuring power consumption are defined. This first edition of IEC 62087-6 cancels and replaces Clause 9 of IEC 62087:2011. This standard together with IEC 62087-1 to IEC 62087-5 cancels and replaces IEC 62087:2011. This International Standard constitutes a technical revision. This edition includes the following significant technical changes with respect to Clause 9 of IEC 62087:2011. The definition of the input signal is changed. The output power measurement of amplifiers is changed. The measurement method for compact audio systems including loudspeakers is added. Methods for measuring On-decoding, idle and auto power down functions are added. Portions of the document related to general measuring conditions and procedures are now contained in IEC 62087-1:2015. Portions of the document related to signals and media are now in IEC 62087-2:2015. The titles have changed in order to comply with the current directives and to accommodate the new multipart structure of IEC 62087.

Audio-, Video- und verwandte Geräte – Messverfahren für die Leistungsaufnahme – Teil 6: Audiogeräte

Matériels audio, vidéo et matériel connexe - Détermination de la consommation de puissance - Partie 6 : Matériel audio

L'IEC 62087-6:2015 spécifie la détermination de la consommation de puissance des matériels audio pour le grand public. Les différents modes de fonctionnement appropriés à la mesure de la consommation de puissance sont définis. La présente norme est limitée au matériel audio qui peut être raccordé au réseau d'alimentation électrique. Un matériel audio qui inclut une batterie principale non amovible n'est pas couvert par la présente norme. Un matériel audio peut inclure un nombre quelconque de batteries auxiliaires. Les conditions de mesure de la présente norme sont celles de l'usage normal du matériel et peuvent différer d'autres conditions, par exemple celles spécifiées dans les normes de sécurité. L'IEC 62087-6:2015 annule et remplace l'Article 9 de l'IEC 62087:2011. La présente norme, en conjonction avec les IEC 62087-1 à IEC 62087-5, annule et remplace l'IEC 62087:2011. La présente norme constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'Article 9 de l'IEC 62087:2011: – la définition du signal d'entrée a été modifiée; – la mesure de la puissance de sortie des amplificateurs a été modifiée; – la méthode de mesure des systèmes audio compacts qui incluent des haut-parleurs a été ajoutée; – des méthodes de mesure de marche décodage, attente et des fonctions d'extinction automatique ont été ajoutées; – les parties du document qui concernent les conditions générales et les modes opératoires de mesure sont désormais contenues dans l'IEC 62087-1:2015; – les parties du document qui concernent les signaux et les supports se trouvent désormais dans l'IEC 62087-2:2015; – les titres ont été modifiés afin de se conformer aux directives actuelles et de tenir compte de la nouvelle structure en plusieurs parties de l'IEC 62087.

Avdio, video in pripadajoča oprema - Ugotavljanje porabe energije - 6. del: Avdio oprema (IEC 62087-6:2015)

Ta del standarda IEC 62087 opredeljuje določitev porabe energije avdio opreme za potrošniško uporabo. Opredeljeni so načini delovanja, primerni za merjenje porabe energije.
Ta standard je omejen na avdio opremo, ki se lahko poveže z električnim omrežjem. Avdio oprema, ki vključuje neodstranljivo glavno baterijo, ni obravnavana v tem standardu. Avdio oprema lahko vključuje poljubno število pomožnih baterij.
Merilni pogoji iz tega standarda predstavljajo običajno uporabo opreme in se lahko razlikujejo od drugih specifičnih pogojev, na primer kot je navedeno v varnostnih standardih.

General Information

Status
Published
Publication Date
10-Sep-2015
Current Stage
6060 - Document made available
Due Date
11-Sep-2015
Completion Date
11-Sep-2015

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Messverfahren für die Leistungsaufnahme von Audio-, Video- und verwandten Geräten - Teil 6: Audiogeräte (IEC 62087-6:2015)Matériels audio, vidéo et matériel connexe - Détermination de la consommation de puissance - Partie 6 : Matériel audio (IEC 62087-6:2015)Audio, video, and related equipment - Determination of power consumption -- Part 6 Audio Equipment (IEC 62087-6:2015)33.160.30Avdio sistemiAudio systems17.220.20Measurement of electrical and magnetic quantitiesICS:Ta slovenski standard je istoveten z:EN 62087-6:2015SIST EN 62087-6:2015en,fr,de01-december-2015SIST EN 62087-6:2015SLOVENSKI

STANDARDSIST EN 62087:20121DGRPHãþD
SIST EN 62087-6:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 62087-6
September 2015 ICS 33.160.10
Supersedes EN 62087:2012 (partially)
English Version

Audio, video and related equipment - Determination of power consumption - Part 6: Audio equipment (IEC 62087-6:2015)

Matériels audio, vidéo et matériel connexe - Détermination de la consommation de puissance - Partie 6 : Matériel audio (IEC 62087-6:2015)

Messverfahren für die Leistungsaufnahme von Audio-, Video- und verwandten Geräten - Teil 6: Audiogeräte (IEC 62087-6:2015) This European Standard was approved by CENELEC on 2015-07-10. 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, 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: Avenue Marnix 17,

B-1000 Brussels © 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 62087-6:2015 E SIST EN 62087-6:2015

EN 62087-6:2015 2 European foreword The text of document 100/2471/FDIS, future edition 1 of IEC 62087-6, prepared by Technical Area 12 "AV energy efficiency and smart grid applications" of IEC/TC 100 "Audio, video and multimedia systems and equipment" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 62087-6:2015.

The following dates are fixed: • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2016-04-10 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2018-07-10

This document supersedes EN 62087:2012 (partially).

Attention is drawn to the possibility that some of the elements of this 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 62087-6:2015 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 60065:2014 NOTE Harmonized as EN 60065:2014 (modified). IEC 60268-1:1985+A1:1988 NOTE Harmonized as HD 483.1 S2:1989 (not modified). IEC 60268-2:1987+A1:1991 NOTE Harmonized as HD 483.2 S2:1993 (not modified). IEC 60268-3:2013 NOTE Harmonized as EN 60268-3:2013 (not modified). IEC 60958-1:2008 NOTE Harmonized as EN 60958-1:2008 (not modified). IEC 60958-1:2008/A1:2014 NOTE Harmonized as EN 60958-1:2008/A1:2014 (not modified). IEC 61672 Series NOTE Harmonized as EN 61672 Series. IEC 61938:2013 NOTE Harmonized as EN 61938:2013 (not modified). IEC 62087 Series NOTE Harmonized as EN 62087 Series. IEC 62301:2011 NOTE Harmonized as EN 50564:2011 (modified). IEC 62368-1:2014 NOTE Harmonized as EN 62368-1:2014 (modified). IEC 62542:2013

NOTE Harmonized as EN 62542:2013 (modified). SIST EN 62087-6:2015
EN 62087-6:2015 3 Annex ZA (normative)

Normative references 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 latest edition of the referenced document (including any amendments) applies.

NOTE 1 When 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 60268-5 2003
Sound system equipment -
Part 5: Loudspeakers EN 60268-5 2003
+A1 2007
+A1 2009
IEC 62087-1 2015
Audio, video, and related equipment - Determination of power consumption -
Part 1: General EN 62087-1 1) - IEC 62087-2 2015
Audio, video, and related equipment - Determination of power consumption -
Part 2: Signals and media EN 62087-2 2) - IEC 62301 (mod) 2011
Household electrical appliances - Measurement of standby power EN 50564 2011
1) At draft stage. 2) To be published. SIST EN 62087-6:2015
SIST EN 62087-6:2015
IEC 62087-6 Edition 1.0 2015-06 INTERNATIONAL STANDARD

Audio, video and related equipment – Determination of power consumption – Part 6: Audio equipment

INTERNATIONAL ELECTROTECHNICAL COMMISSION
ICS 33.160.10
ISBN 978-2-8322-2686-5
® Registered trademark of the International Electrotechnical Commission ®

Warning! Make sure that you obtained this publication from an authorized distributor. SIST EN 62087-6:2015 colourinside

– 2 – IEC 62087-6:2015 © IEC 2015 CONTENTS FOREWORD ........................................................................................................................... 4 INTRODUCTION ..................................................................................................................... 6 1 Scope .............................................................................................................................. 7 2 Normative references ...................................................................................................... 7 3 Terms, definitions and abbreviations ............................................................................... 7 3.1 Terms and definitions .............................................................................................. 7 3.2 Abbreviations .......................................................................................................... 9 4 Specification of operating modes and functions ............................................................... 9 5 Measurement conditions ................................................................................................ 10 5.1 General ................................................................................................................. 10 5.2 Power source ........................................................................................................ 11 5.3 Environmental conditions ...................................................................................... 11 5.4 Acoustical environment ......................................................................................... 11 5.5 Adjustment of controls .......................................................................................... 11 5.6 Power measurement instrument ............................................................................ 11 5.7 Signal generation .................................................................................................. 11 5.8 Quantities to be specified and their accuracy ........................................................ 11 5.9 Loading of terminals ............................................................................................. 11 5.10 Output level .......................................................................................................... 11 5.10.1 General ......................................................................................................... 11 5.10.2 Output level at 1 W ........................................................................................ 11 5.10.3 Output level at one-eighth of non-clipped power ............................................ 11 5.11 Sound level adjustments ....................................................................................... 12 5.12 Sound pressure level meter .................................................................................. 12 5.13 Additional functions ............................................................................................... 12 5.14 Operating modes .................................................................................................. 12 5.14.1 General ......................................................................................................... 12 5.14.2 On modes ...................................................................................................... 12 5.14.3 Partial On modes ........................................................................................... 12 5.14.4 Off mode ....................................................................................................... 13 5.14.5 Auto power down function .............................................................................. 13 6 Measurement procedure ................................................................................................ 13 6.1 Order of measurements ........................................................................................ 13 6.2 Setup .................................................................................................................... 14 6.2.1 General ......................................................................................................... 14 6.2.2 Audio equipment terminals and settings ......................................................... 15 6.2.3 Compact audio system including loudspeaker ................................................ 16 6.3 Power measurement ............................................................................................. 16 6.3.1 General ......................................................................................................... 16 6.3.2 Off and Partial On modes .............................................................................. 16 6.3.3 On modes ...................................................................................................... 17 6.3.4 Auto power down ........................................................................................... 18 Annex A (informative)

Location for sound pressure test ....................................................... 19 A.1 General ................................................................................................................. 19 A.2 Example test locations .......................................................................................... 19 SIST EN 62087-6:2015

IEC 62087-6:2015 © IEC 2015 – 3 –

Bibliography .......................................................................................................................... 21

Figure 1 – Order of measurements ........................................................................................ 14 Figure 2 – Separate components .......................................................................................... 14 Figure 3 – Audio systems (non separable components) ........................................................ 15 Figure 4 – Audio systems (separable conponents) ................................................................ 15 Figure 5 – Compact audio system including loudspeaker ...................................................... 15 Figure 6 – Auto power down function .................................................................................... 18 Figure A.1 – Top view ........................................................................................................... 19 Figure A.2 – Top and front view ............................................................................................ 20 Figure A.3 – Side view .......................................................................................................... 20

Table 1 – Operating modes and functions ............................................................................. 10

SIST EN 62087-6:2015

– 4 – IEC 62087-6:2015 © IEC 2015 INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________

AUDIO, VIDEO AND RELATED EQUIPMENT –
DETERMINATION OF POWER CONSUMPTION –
Part 6: Audio equipment

FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62087-6 has been prepared by technical area 12: AV energy efficiency and smart grid applications, of IEC technical committee 100: Audio, video and multimedia systems and equipment. This first edition of IEC 62087-6 cancels and replaces Clause 9 of IEC 62087:2011. This standard together with IEC 62087-1 to IEC 62087-5 cancels and replaces IEC 62087:2011. This International Standard constitutes a technical revision. This edition includes the following significant technical changes with respect to Clause 9 of IEC 62087:2011. – The definition of the input signal is changed. – The output power measurement of amplifiers is changed. – The measurement method for compact audio systems including loudspeakers is added. SIST EN 62087-6:2015

IEC 62087-6:2015 © IEC 2015 – 5 –

– Methods for measuring On-decoding, idle and auto power down functions are added. – Portions of the document related to general measuring conditions and procedures are now contained in IEC 62087-1:2015. – Portions of the document related to signals and media are now in IEC 62087-2:2015. – The titles have changed in order to comply with the current directives and to accommodate the new multipart structure of IEC 62087. The text of this standard is based on the following documents: FDIS Report on voting 100/2471/FDIS 100/2501/RVD

Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. A list of all parts in the IEC 62087 series, published under the general title Audio, video, and related equipment – Determination of power consumption, can be found on the IEC website. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to the specific publication. At this date, the publication will be • reconfirmed, • withdrawn, • replaced by a revised edition, or • amended. A bilingual version of this publication may be issued at a later date.

SIST EN 62087-6:2015

– 6 – IEC 62087-6:2015 © IEC 2015 INTRODUCTION This part of IEC 62087 specifies methods of measurements for the power consumption of audio equipment for consumer use. It is used in conjunction with IEC 62087-2, which specifies signals and media. This International Standard includes measurements in the On mode (operation), which was previously identified as “On (average) mode” and adds methods for measuring power consumption in the On-play, On-decoding, and idle sub-modes. These methods consider the effects of the auto power down function. Additionally, this standard includes determination of power consumption in the Partial On mode. This standard has been divided into multiple parts. At the time of publication of this part, the following parts are planned or published. – Part 1: General – Part 2: Signals and media – Part 3: Television sets – Part 4: Video recording equipment – Part 5: Set-top boxes (STB) – Part 6: Audio equipment

SIST EN 62087-6:2015
IEC 62087-6:2015 © IEC 2015 – 7 –
AUDIO, VIDEO AND RELATED EQUIPMENT –
DETERMINATION OF POWER CONSUMPTION –
Part 6: Audio equipment

1 Scope This part of IEC 62087 specifies the determination of the power consumption of audio equipment for consumer use. The various modes of operation which are relevant for measuring power consumption are defined. This standard is limited to audio equipment which can be connected to the mains. Audio equipment that includes a non-removable, main battery is not covered by this standard. Audio equipment may include any number of auxiliary batteries. The measuring conditions in this standard represent the normal use of the equipment and may differ from other specific conditions, for example as specified in safety standards. 2 Normative references 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 latest edition of the referenced document (including any amendments) applies. IEC 60268-5:2003, Sound system equipment – Part 5: Loudspeakers

IEC 60268-5:2003/AMD1:2007 IEC 62087-1:2015, Audio, video, and related equipment – Determination of power consumption – Part 1: General IEC 62087-2:2015, Audio, video, and related equipment – Determination of power consumption – Part 2: Signals and media IEC 62301:2011, Household electrical appliances − Measurement of standby power 3 Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes of this document, the terms and definitions in IEC 62087-1:2015, IEC 62087-2:2015, and the following apply. 3.1.1

additional functions functions that are not required for the basic operation of the device Note 1 to entry: Functions other than a main function. SIST EN 62087-6:2015

– 8 – IEC 62087-6:2015 © IEC 2015 3.1.2

audio equipment appliance which has the main function of reproducing analogue and/or digital audio signals 3.1.3

audio systems audio equipment of separable or non-separable components for one or more audio functions 3.1.4

compact audio systems including loudspeakers amplifier and one or more audio sources in a single enclosure, which might also contain the loudspeakers Note 1 to entry: The loudspeakers can be attached to, and separable from, the main enclosure. 3.1.5

free-field conditions environment, such as an anechoic room, in which the sound pressure decreases by a factor of 2 with the doubling of the distance from a point source 3.1.6

main function function, specified by the manufacturer, which produces sound from loudspeaker(s) and/or output terminal(s) 3.1.7

mass storage device non-removable, non-volatile storage for the recording of audio signals 3.1.8

multi-channel two or more channels 3.1.9

non-clipped power sine-wave power dissipated in the rated load impedance, measured at 1 000 Hz or the frequency of the peak response, if the operation at 1 kHz is not intended, at the onset of clipping at either one or both peaks 3.1.10

rated load impedance impedance specified by the manufacturer and assumed to be a constant pure resistance measured at the output terminals of an amplifier 3.1.11

separate components standalone audio equipment that provides one or more audio functions 3.1.12

sound pressure level SPL logarithm of the ratio of a given sound pressure to the reference sound pressure Note 1 to entry: Unless otherwise specified, the reference sound pressure is 20 µ. Note 2 to entry: Unless otherwise specified, the sound pressures are understood to be expressed in root-mean-square values. Note 3 to entry: Sound pressure level in decibels is 20 times the logarithm to the base ten of the ratio. SIST EN 62087-6:2015

IEC 62087-6:2015 © IEC 2015 – 9 –
3.1.13

surround sound equipment multi-channel audio equipment that includes front and rear channel capabilities EXAMPLE Home theatre in a box, integrated surround sound amplifier. 3.2 Abbreviations  Prime PS Power Supply unit SPL Sound Pressure Level SW Switch unit UUT Unit Under Test 4 Specification of operating modes and functions Table 1 describes the various operating modes and functions for audio equipment. For all modes, main batteries, if any, shall be removed for the duration of the measurement procedure. (See IEC 62087-1:2015, 5.1.1.1) SIST EN 62087-6:2015

– 10 – IEC 62087-6:2015 © IEC 2015 Table 1 – Operating modes and functions Power Mode Sub-mode Function(s) Description 0 W Disconnected Disconnected – Disconnected from the main power source

The audio equipment is disconnected or galvanically isolated from all external power sources. ≥0 W Off Off – Off The audio equipment is connected to an external power source and provides no functions that depend on an external power source. The equipment cannot be switched into any other mode with the remote control unit, or an external or internal signal. Note that some power may be consumed if an EMC filter or other components exist on the source side of the power switch. ≥0 W Partial on

Standby- passive – Wake on • remote control • internal signal The audio equipment is connected to an external power source and does not provide its main functions. The equipment can be switched into another mode with the remote control unit or an internal signal, but not with an external signal. Standby-

active, low – Wake on • remote control • internal signal • external signal The audio equipment is connected to an external power source and does not provide its main functions. The equipment can be switched into another mode with the remote control unit, an internal signal, or an external signal. Standby- active, high – Wake on • remote control • internal signal • external signal Data communications The audio equipment is connected to an external power source and does not provide its main functions. The equipment can be switched into another mode with the remote control unit, an internal signal, or an external signal. Additionally, the equipment is exchanging/receiving data with/from an external source.

>0 W On Idle Idle Form of On mode during which the equipment is capable of performing its main function(s) but is not doing so. On-play Operation The audio equipment is performing its main functions. On-decoding

Operation The audio equipment is decoding compressed audio from a mass storage device or external input. On-record Operation The audio equipment is recording a single programme and may or may not provide the audio outputs of the programme being recorded. The terms 'standby mode' or 'sleep mode' also describe the Partial On mode.

5 Measurement conditions 5.1 General The measurement conditions clause specifies requirements that are independent of the equipment to be measured. When setting up a test laboratory, these requirements shall be taken into account. SIST EN 62087-6:2015

IEC 62087-6:2015 © IEC 2015 – 11 –

The requirements in this clause apply to the measurement methods specified in Clause 6. 5.2 Power source Defined in IEC 62087-1:2015, 5.1.1. 5.3 Environmental conditions Defined in IEC 62087-1:2015, 5.1.2. 5.4 Acoustical environment SPL measurements shall be made under the free-field conditions specified in IEC 60268-5:2003, 5.2. 5.5 Adjustment of controls The controls not specifically mentioned in this standard shall be in the position adjusted by the manufacturer for shipment to the end user. These controls shall remain in this state for the duration of the test. 5.6 Power measurement instrument Defined in IEC 62087-1:2015, 5.1.1. 5.7 Signal generation Defined in IEC 62087-2:2015, Clause 6. 5.8 Quantities to be specified and their accuracy Unless otherwise stated, the values of voltage, current, sound pressure, etc., mentioned in this standard are assumed to be r.m.s. quantities. For most purposes, it is sufficient to measure electrical quantities with an accuracy of ± 0,15 dB and acoustical quantities with an accuracy of ± 1 dB. Unless otherwise stated, it is assumed that the distance between a measurement point and its reference point is determined with an accuracy of ±0,01 m. The accuracy of measurement required depends only on the purpose for which the results are to be used. 5.9 Loading of terminals All loudspeaker terminals should be terminated with the minimum impedance as specified by the manufacturer. 5.10 Output level 5.10.1 General In the case of surround sound equipment, only the front left and front right speaker terminals shall be loaded. 5.10.2 Output level at 1 W The volume control shall be adjusted to obtain 1 W at the loudspeaker terminals. 5.10.3 Output level at one-eighth of non-clipped power If the maximum non-clipped power is less than 8 W, the volume control shall be adjusted to obtain one-eighth of non-clipped power at the loudspeaker terminals. SIST EN 62087-6:2015

– 12 – IEC 62087-6:2015 © IEC 2015 Where the non-clipped power cannot be obtained using any audio test signal, the maximum attainable output power is taken. 5.11 Sound level adjustments The volume control shall be set to a level at which a SPL of 60 dB is measured 1 m from the loudspeaker. NOTE An SPL of 60 dB is not necessarily the same output level as 1 W at the loudspeaker terminals. 5.12 Sound pressure level meter Measurements in free-field condition shall be made using a sound pressure level meter having a known calibration. NOTE Class 1 certified meter, specified in IEC 61672, with A-weighting, specified in IEC 60268-1. 5.13 Additional functions Additional functions shall be turned off during the measurement process in the cases that those functions can be turned on and off by the end user. 5.14 Operating modes 5.14.1 General Audio equipment can operate in many modes. 5.14.2 On modes 5.14.2.1 On-play The audio equipment is performing the main function. 5.14.2.2 On-decoding The audio equipment is decoding compressed audio from a mass storage device or external input. 5.14.2.3 Idle A form of On mode during which the equipment is capable of performing its main function(s) but is not doing so. EXAMPLE 1 Audio

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