Sound and television broadcast receivers and associated equipment - Immunity characteristics - Limits and methods of measurement

Applies to television broadcast receivers, sound broadcast receivers and associated equipment intended for use in the residential, commercial and light industrial environment. Describes the methods of measurement and specified limits applicable to sound and television receivers and to associated equipment with regard to their immunity characteristics to disturbing signals. This standard is also applicable to the immunity of outdoor units of direct to home (DTH) satellite receiving systems for individual reception. Immunity requirements are given in the frequency range 0 Hz to 400 GHz. Radio-frequency tests outside the specified frequency bands or concerning other phenomena than given in this standard are not required. The objective of this standard is to define the immunity test requirements for equipment defined in the scope in relation to continuous and transient, conducted and radiated disturbances including electrostatic discharges. These test requirements represent essential electromagnetic immunity requirements. Test requirements are specified for each port (enclosure or connector) considered. The environments encompassed by this standard are residential, commercial and light-industrial locations, both indoor and outdoor. The following list, although not comprehensive, gives an indication of locations which are included: - residential properties, e.g. houses, apartments, etc.; - retail outlets, e.g. shops, supermarkets, etc.; - business premises, e.g. offices, banks, etc.; - areas of public entertainment, e.g. cinemas, public bars, dance halls, etc.; - outdoor locations, e.g. petrol stations, car parks, amusement and sports centres, etc.; - light-industrial locations e.g. workshops, laboratories, service centres, etc.; - car and boat. Locations which are characterized by their mains power being supplied directly at low voltage from the public mains are considered to be residential, commercial or light industrial.

Ton- und Fernseh-Rundfunkempfänger und verwandte Geräte der Unterhaltungselektronik - Störfestigkeitseigenschaften - Grenzwerte und Prüfverfahren

Récepteurs de radiodiffusion et de télévision et équipements associés - Caractéristiques d'immunité - Limites et méthodes de mesure

S'applique aux récepteurs de télévision, aux récepteurs de radiodiffusion sonore et aux appareils associés destinés à être utilisés dans un environnement résidentiel, commercial et dans l'industrie légère. Décrit les méthodes de mesure et spécifie des valeurs limites applicables aux récepteurs de radiodiffusion sonore et de télévision et aux équipements qui leur sont associés vis-à-vis de leurs caractéristiques d'immunité aux signaux non désirés. La présente norme concerne aussi l'immunité des unités extérieures des systèmes de réception individuelle par satellite. Les exigences d'immunité sont données dans la bande de fréquences de 0 Hz à 400 GHz. Les essais aux fréquences radioélectriques situées en dehors de ces bandes de fréquences spécifiées ou ceux concernant d'autres phénomènes que ceux donnés dans la présente norme ne sont pas exigés. L'objet de cette norme est de définir les exigences pour les essais d'immunité aux perturbations continues et transitoires, conduites et rayonnées, y compris les décharges électrostatiques, pour les appareils définis dans le domaine d'application. Ces exigences d'essais représentent les exigences essentielles de compatibilité électromagnétique concernant l'immunité. Les essais prescrits sont spécifiés pour chaque accès (enveloppe ou connecteur) considéré. Les environnements couverts par cette norme sont les emplacements résidentiels, les locaux commerciaux et de l'industrie légère, intérieurs et extérieurs. La liste suivante, bien que non exhaustive, donne une indication sur les emplacements qui sont couverts: - propriétés résidentielles, par exemple maisons, appartements, etc.; - lieux de vente au détail, par exemple boutiques, supermarchés, etc.; - centres d'affaires, par exemple bureaux, banques, etc.; - locaux de loisirs recevant du public, par exemple cinémas, bars, dancings, etc.; - sites extérieurs, par exemple stations service, parcs de stationnement, centres de loisirs et centres sportifs, etc.; - locaux de l'industrie légère, par exemple ateliers, laboratoires, centres de services, etc.; - véhicules et bateaux. Les emplacements qui sont caractérisés par leur alimentation directe en basse tension par le réseau public sont considérés comme résidentiels, commerciaux ou pour l'industrie légère.

Zvokovni in radiodifuzijski sprejemniki s pripadajočo opremo - Karakteristike odpornosti proti motnjam - Mejne vrednosti in metode merjenja (CISPR 20:2006)

Ta standard za zahteve odpornosti velja za radiodifuzijske sprejemnike, zvokovne sprejemnike in pripadajočo opremo, ki se uporabljajo v stanovanjskem, gospodarskem in lažjem industrijskem okolju. Ta standard opisuje metode merjenja in določene mejne vrednosti, ki veljajo za zvokovne in radiodifuzijske sprejemnike s pripadajočo opremo glede njihovih karakteristik odpornosti proti motečim signalom. Ta standard velja tudi za odpornost zunanjih enot satelitskih sprejemnih sistemov DTH (naravnost na dom) za posamično sprejemanje.

General Information

Status
Published
Publication Date
08-Jan-2007
Current Stage
6060 - Document made available
Due Date
09-Jan-2007
Completion Date
09-Jan-2007

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SLOVENSKI STANDARD
SIST EN 55020:2007
01-september-2007
1DGRPHãþD
SIST EN 55020:2003
SIST EN 55020:2003/A1:2004
SIST EN 55020:2003/A2:2005
SIST EN 55020:2003/IS2:2007
=YRNRYQLLQUDGLRGLIX]LMVNLVSUHMHPQLNLVSULSDGDMRþRRSUHPR.DUDNWHULVWLNH
RGSRUQRVWLSURWLPRWQMDP0HMQHYUHGQRVWLLQPHWRGHPHUMHQMD &,635
Sound and television broadcast receivers and associated equipment - Immunity
characteristics - Limits and methods of measurement
Ton- und Fernseh-Rundfunkempfänger und verwandte Geräte der

Unterhaltungselektronik - Störfestigkeitseigenschaften - Grenzwerte und Prüfverfahren

Récepteurs de radiodiffusion et de télévision et équipements associés - Caractéristiques

d'immunité - Limites et méthodes de mesure
Ta slovenski standard je istoveten z: EN 55020:2007
ICS:
33.100.20 Imunost Immunity
33.160.01 Avdio, video in avdiovizualni Audio, video and audiovisual
sistemi na splošno systems in general
SIST EN 55020:2007 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 55020
NORME EUROPÉENNE
January 2007
EUROPÄISCHE NORM
ICS 33.100.20 Supersedes EN 55020:2002 + A1:2003 + A2:2005
+ IS1:2007 + IS2:2007
English version
Sound and television broadcast receivers
and associated equipment -
Immunity characteristics -
Limits and methods of measurement
(CISPR 20:2006)
Récepteurs de radiodiffusion et de Ton- und Fernseh-Rundfunkempfänger
télévision et équipements associés - und verwandte Geräte der
Caractéristiques d'immunité - Unterhaltungselektronik -
Limites et méthodes de mesure Störfestigkeitseigenschaften -
(CISPR 20:2006) Grenzwerte und Prüfverfahren
(CISPR 20:2006)

This European Standard was approved by CENELEC on 2006-12-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the

Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,

Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 55020:2007 E
---------------------- Page: 2 ----------------------
- 2 - EN 55020:2007
Foreword

The text of document CISPR/I/200/FDIS, future edition 6 of CISPR 20, prepared by CISPR SC I,

Electromagnetic compatibility of information technology equipment, multimedia equipment and receivers,

was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 55020 on

2006-12-01.

This European Standard supersedes EN 55020:2002 (+ corrigendum September 2005) + A1:2003

(+ corrigendum September 2005) + A2:2005 + IS1:2007 + IS2:2007.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2007-09-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2009-12-01
with the EN have to be withdrawn

This European Standard has been prepared under a mandate given to CENELEC by the European

Commission and the European Free Trade Association and covers essential requirements of

EC Directives 89/336/EEC, 2004/108/EC and 1999/5/EC. See Annex ZZ.
Annexes ZA and ZZ have been added by CENELEC.
__________
Endorsement notice

The text of the International Standard CISPR 20:2006 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:

CISPR 22 NOTE Harmonized as EN 55022:2006 (modified).
CISPR 24 NOTE Harmonized as EN 55024:1998 (modified).
__________
---------------------- Page: 3 ----------------------
EN 55020:2007 - 3 -
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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 When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.
Publication Year Title EN/HD Year
1) 2)
CISPR 16-1-3 - Specification for radio disturbance and EN 55016-1-3 2006
immunity measuring apparatus and methods
Part 1-3: Radio disturbance and immunity
measuring apparatus - Ancillary equipment -
Disturbance power
IEC 60050-161 - International Electrotechnical Vocabulary - -
(IEV)
Chapter 161: Electromagnetic compatibility
IEC 60268-1 1985 Sound system equipment HD 483.1 S2 1989
Part 1: General
1) 2)
IEC 61000-4-2 - Electromagnetic compatibility (EMC) EN 61000-4-2 1995
Part 4-2: Testing and measurement
techniques - Electrostatic discharge immunity
test
1) 2)
IEC 61000-4-3 - Electromagnetic compatibility (EMC) EN 61000-4-3 2006
Part 4-3 : Testing and measurement
techniques - Radiated, radio-frequency,
electromagnetic field immunity test
1) 2)
IEC 61000-4-4 - Electromagnetic compatibility (EMC) EN 61000-4-4 2004
Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst
immunity test
IEC 61672-1 2002 Electroacoustics - Sound level meters EN 61672-1 2003
Part 1: Specifications
ETS 300 158 1992 Satellite Earth Stations and Systems (SES) - - -
Television Receive Only (TVRO-FSS)
Satellite Earth Stations operating in the 11/12
GHz FSS bands
ETS 300 249 1993 Satellite Earth Stations and Systems (SES) - - -
Television Receive-Only (TVRO) equipment
used in the Broadcasting Satellite Service
(BSS)
Undated reference.
Valid edition at date of issue.
HD 483.1 S2 includes A1 to IEC 60268-1.
---------------------- Page: 4 ----------------------
- 4 - EN 55020:2007
Publication Year Title EN/HD Year
ITU-R - Measurement of audio-frequency noise - -
Recommendation voltage level in sound broadcasting
BS 468-4
ITU-R 1986 Nomenclature and description of colour bar - -
Recommendation signals
BT.471-1
ITU-R - Methodology for the subjective assessment of - -
Recommendation the quality of television pictures
BT.500-10
ITU-T - Transmission performance of television - -
Recommendation circuits designed for use in international
J.61 connections
---------------------- Page: 5 ----------------------
EN 55020:2007 - 5 -
Annex ZZ
(informative)
Coverage of Essential Requirements of EC Directives

This European Standard has been prepared under a mandate given to CENELEC by the European

Commission and the European Free Trade Association and within its scope the standard covers the

essential requirements as given in Article 4(b) of the EC Directive 89/336/EEC and Annex I Article 1(b) of

the EC Directive 2004/108/EC, and the essential requirements of Article 3.1(b) (immunity only) of the EC

Directive 1999/5/EC.

Compliance with this standard provides one means of conformity with the specified essential

requirements of the Directives concerned.

WARNING: Other requirements and other EC Directives may be applicable to the products falling within

the scope of this standard.
__________
---------------------- Page: 6 ----------------------
COMMISSION
CISPR
ÉLECTROTECHNIQUE
INTERNATIONALE
INTERNATIONAL
Sixième édition
ELECTROTECHNICAL
Sixth edition
2006-11
COMMISSION
COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
Récepteurs de radiodiffusion et
de télévision et équipements associés –
Caractéristiques d’immunité –
Limites et méthodes de mesure
Sound and television broadcast
receivers and associated equipment –
Immunity characteristics –
Limits and methods of measurement
© IEC 2006 Droits de reproduction réservés ⎯ Copyright - all rights reserved

Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any

utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including

électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from

microfilms, sans l'accord écrit de l'éditeur. the publisher.

International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland

Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch

CODE PRIX
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PRICE CODE
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
---------------------- Page: 7 ----------------------
CISPR 20 © IEC:2006 – 3 –
CONTENTS

FOREWORD.........................................................................................................................11

1 Scope and object............................................................................................................15

2 Normative references .....................................................................................................17

3 Terms, definitions and abbreviations ..............................................................................17

3.1 Terms and definitions ............................................................................................17

3.2 Abbreviations ........................................................................................................23

4 Immunity requirements ...................................................................................................23

4.1 Performance criteria ..............................................................................................23

4.2 Applicability...........................................................................................................27

4.3 Immunity requirements for the antenna input connector.........................................27

4.4 Immunity requirements for audio connectors .........................................................43

4.5 Immunity requirements for AC mains power connectors.........................................45

4.6 Requirements for immunity to RF voltages ............................................................45

4.7 Immunity requirements for the enclosure port ........................................................49

5 Immunity measurements.................................................................................................57

5.1 General conditions during testing ..........................................................................57

5.2 Performance assessment ......................................................................................59

5.3 Measurement of input immunity.............................................................................63

5.4 Measurement of immunity to RF voltage (common mode) at antenna terminal.......65

5.5 Measurement of screening effectiveness ...............................................................69

5.6 Measurement of electrical transients .....................................................................71

5.7 Measurement of immunity to induced voltages ......................................................71

5.8 Measurement of immunity from radiated fields.......................................................77

5.9 Measurement of electrostatic discharge.................................................................83

6 Interpretation of CISPR immunity limits ..........................................................................83

6.1 Significance of a CISPR limit.................................................................................83

6.2 Compliance with limits on a statistical basis ..........................................................83

Annex A (normative) Specification of the test-TV-set .........................................................103

Annex B (normative) Specification of filters and weighting network ....................................105

Annex C (normative) Specification of coupling units and of low-pass filter ........................109

Annex D (normative) Matching networks and mains stop filter...........................................123

Annex E (normative) Construction information for the open stripline and for the mains

and loudspeaker band-stop filter .........................................................................................127

Annex F (normative) Calibration of the open stripline.........................................................139

Annex G (normative) Ferrite core sizes and materials ........................................................145

Annex H (informative) Frequency bands ............................................................................147

Annex I (normative) Broadcast receivers for digital signals ...............................................149

Annex J (informative) Specification of the wanted signal...................................................157

Annex K (informative) Objective evaluation of picture quality ............................................167

Bibliography........................................................................................................................175

---------------------- Page: 8 ----------------------
CISPR 20 © IEC:2006 – 5 –

Figure 1 – Examples of ports ................................................................................................23

Figure 2 – Audio power output measurement ........................................................................85

Figure 3 – Measuring set-up for input immunity measurement of sound broadcast

receivers...............................................................................................................................85

Figure 4 – Measuring set-up for input immunity measurement of television receivers

and video tape equipment.....................................................................................................87

Figure 5 – General principle of the current injection method..................................................89

Figure 6 – Measurement principle for the immunity from conducted currents.........................91

Figure 7 – Measuring set-up for the screening effectiveness.................................................93

Figure 8 – Measurement of immunity from induced voltages at mains input,

headphones, speakers, audio output, audio input .................................................................95

Figure 9 – Example of the arrangement of an open stripline TEM device in combination

with absorbing plates inside a screened room with dimensions of 3 m x 3,5 m ......................97

Figure 10 – Measurement of the immunity of broadcast receivers from radiated fields

in the frequency range 0,15 MHz to 150 MHz in an open stripline .........................................99

Figure 11 – Measurement of the immunity from RF e.m. field, keyed carrier, using a

dummy GSM portable telephone .........................................................................................101

Figure B.1 – Band-pass filter 0,5 kHz to 3 kHz....................................................................105

Figure C.1 – Coupling unit type AC (for coaxial antenna input) ...........................................115

Figure C.2 – Coupling unit type MC (for mains lead) ...........................................................117

Figure C.3 – Coupling unit type LC (for loudspeaker leads) ................................................119

Figure C.4 – Coupling unit type Sr with load resistances.....................................................119

Figure C.5 – Measuring set-up to check the insertion loss of the coupling units in the

frequency range 30 MHz to 150 MHz ..................................................................................121

Figure D.1 – RC network for audio inputs (RC ) .................................................................123

Figure D.2 – RC network for audio outputs (RC ) ...............................................................123

Figure D.3 – Mains stop filter (MSF) ...................................................................................125

Figure E.1 – Open stripline TEM device, basic configuration with matching network

and terminating impedance .................................................................................................127

Figure E.2 – Overview of an open stripline TEM device.......................................................129

Figure E.3 – Constructional details of an open stripline, TEM device ..................................131

Figure E.4 – Supplementary constructional details of the open stripline TEM device...........133

Figure E.5 – Matching network MN .....................................................................................133

Figure E.6 – Terminating impedance TI ..............................................................................133

Figure E.7 – Band-stop filter type MBS circuit (for mains connection) .................................135

Figure E.8 – Band-stop filter type LBS (for loudspeaker connection) ...................................137

Figure F.1 – Circuit arrangement for calibration of the measuring set-up.............................141

Figure F.2 – Example of additional arrangement for enquiry of the calibration curve ...........143

Figure F.3 – Calibration curve.............................................................................................143

Figure K.1 – Measuring set-up for objective picture evaluation for EUT equipped with

a display .............................................................................................................................173

Figure K.2 – Measuring set-up for objective picture evaluation for EUT without a

display................................................................................................................................173

---------------------- Page: 9 ----------------------
CISPR 20 © IEC:2006 – 7 –
Table 1 – Survey (non exhaustive) of receiver and associated equipment types,

including the appropriate parts of multifunction equipment ....................................................19

Table 2 – Antenna port .........................................................................................................29

Table 3 – Limits of input immunity from unwanted signals outside the FM range (see

also 5.3.1.2 for the wanted signal) ........................................................................................29

Table 4 – Limits of input immunity from unwanted signals inside the FM range (see

also 5.3.1.3 for the wanted signal) ........................................................................................31

Table 5 – Limits of input immunity of television receivers for systems B, G and I .................33

Table 5a – Limits of input immunity of television receivers for system L ................................35

Table 5b – Limits of input immunity of television receivers for systems D-SECAM, K-

SECAM (used in Russia).......................................................................................................35

Table 5c – Limits of input immunity of television receivers for systems PAL D/K (used

in central Europe) .................................................................................................................37

Table 5d – Limits of input immunity of television receivers for system M-NTSC with a

58,75 MHz IF video carrier (used in Japan)..........................................................................37

Table 6 – Limits of input immunity of television receivers ......................................................39

Table 7 – Limits of input immunity of satellite television receivers .........................................39

Table 7a – Limits of input immunity of satellite television receivers (Used in Japan,

Korea) ..................................................................................................................................41

Table 8 – Limits of immunity to RF voltages (common mode) of antenna terminals ...............41

Table 8a – Limits of screening effectiveness of the coaxial antenna terminals ......................43

Table 9 – Loudspeakers/headphone output port....................................................................43

Table 10 – Audio input/output port (excluding loudspeaker and headphone) .........................45

Table 11 – Power input port ..................................................................................................45

Table 12 – Limits of immunity to RF voltages of mains, loudspeaker and headphone

terminals...............................................................................................................................47

Table 13 – Limits of immunity to RF voltages of audio input and output terminals

(except loudspeaker and headphone terminals) ....................................................................47

Table 14 – Additional unwanted signal frequencies to be excluded in tests on sound

and television reception functions. ........................................................................................49

Table 15 – Enclosure port.....................................................................................................49

Table 16 – Limits of immunity to ambient electromagnetic fields of FM reception

functions of sound receivers .................................................................................................51

Table 17 – Limits of immunity to ambient electromagnetic fields of television receivers

operating in the reception function ........................................................................................53

Table 18 – Limits of immunity to ambient electromagnetic fields of video tape

equipment in the playback mode...........................................................................................55

Table 19 – Limits of immunity to ambient electromagnetic fields of equipment with

audio or video functions........................................................................................................55

Table 20 – Limits of immunity to ambient electromagnetic fields of camcorders in the

playback mode......................................................................................................................57

Table 21 – Function of the connections in Figure 8 ...............................................................75

Table 22 – Measurement conditions for the test of immunity from conducted voltages ..........75

---------------------- Page: 10 ----------------------
CISPR 20 © IEC:2006 – 9 –

Table 23 – Measurement conditions for the test of immunity from radiated fields ..................81

Table G.1 – Ferrite core sizes and materials.......................................................................145

---------------------- Page: 11 ----------------------
CISPR 20 © IEC:2006 – 11 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
_____________
SOUND AND TELEVISION BROADCAST RECEIVERS
AND ASSOCIATED EQUIPMENT –
IMMUNITY CHARACTERISTICS –
LIMITS AND METHODS OF MEASUREMENT
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any

equipment declared to be in conformity with an IEC Publication.

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 CISPR 20 has been prepared by CISPR, subcommittee I:

Electromagnetic compatibility of information technology equipment, multimedia equipment and

receivers.

This sixth edition of CISPR 20 cancels and replaces the fifth edition published in 2002, its

Amendment 1 (2002) and Amendment 2 (2004).

The document CISPR/I/200/FDIS, circulated to the National Committees as Amendment 3, led

to the publication of the new edition.
---------------------- Page: 12 ----------------------
CISPR 20 © IEC:2006 – 13 –

The text of this standard is based on the second edition, Amendment 1, Amendment 2 and the

following documents:
FDIS Report on voting
CISPR/I/200/FDIS CISPR/I/216/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.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

The committee has decided that the contents of the base publication and its amendments will

remain unchanged until the maintenance result date indicated on the IEC web site 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.
---------------------- Page: 13 ----------------------
CISPR 20 © IEC:2006 – 15 –
SOUND AND TELEVISION BROADCAST RECEIVERS
AND ASSOCIATED EQUIPMENT –
IMMUNITY CHARACTERISTICS –
LIMITS AND METHODS OF MEASUREMENT
1 Scope and object

This standard for immunity requirements applies to television broadcast receivers, sound

broadcast receivers and associated equipment intended for use in the residential, commercial

and light industrial environment.

This standard describes the methods of measurement and specified limits applicable to sound

and television receivers and to associated equipment with regard
...

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