SIST EN 55020:2007

SLOVENSKI STANDARD
SIST EN 55020:2007
01-september-2007
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SIST EN 55020:2003
SIST EN 55020:2003/A1:2004
SIST EN 55020:2003/A2:2005
SIST EN 55020:2003/IS2:2007
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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.

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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

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- 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).
__________

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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


1)
IEC 60050-161 - International Electrotechnical Vocabulary - -
(IEV)
Chapter 161: Electromagnetic compatibility


3)
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)



1)
Undated reference.
2)
Valid edition at date of issue.
3)
HD 483.1 S2 includes A1 to IEC 60268-1.

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- 4 - EN 55020:2007
Publication Year Title EN/HD Year
1)
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


1)
ITU-R - Methodology for the subjective assessment of - -
Recommendation the quality of television pictures
BT.500-10


1)
ITU-T - Transmission performance of television - -
Recommendation circuits designed for use in international
J.61 connections

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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.
__________

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COMMISSION
CISPR

ÉLECTROTECHNIQUE
20

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
XC
Commission Electrotechnique Internationale
PRICE CODE
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

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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

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

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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

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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

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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,
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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
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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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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.
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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.

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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.

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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
...