SIST EN 61000-4-21:2011
(Main)Electromagnetic compatibility (EMC) - Part 4-21: Testing and measurement techniques - Reverberation chamber test methods
Electromagnetic compatibility (EMC) - Part 4-21: Testing and measurement techniques - Reverberation chamber test methods
This part of IEC 61000 considers tests of immunity and intentional or unintentional emissions
for electric and/or electronic equipment and tests of screening effectiveness in reverberation chambers. It establishes the required test procedures for performing such tests. Only radiated phenomena are considered.
The objective of this part is to establish a common reference for using reverberation chambers to evaluate the performance of electric and electronic equipment when subjected to radio-frequency electromagnetic fields and for determining the levels of radio-frequency radiation emitted from electric and electronic equipment.
NOTE Test methods are defined in this part for measuring the effect of electromagnetic radiation on equipment and the electromagnetic emissions from equipment concerned. The simulation and measurement of electromagnetic radiation is not adequate for quantitative determination of effects. The defined test methods are organized with the aim to establish adequate reproducibility and repeatability of test results and qualitative analysis of effects.
This part of IEC 61000 does not intend to specify the tests to be applied to a particular apparatus or system. Its main aim is to give a general basic reference to all concerned product committees of the IEC. The product committees should select emission limits and test methods in consultation with CISPR. The product committees remain responsible for the appropriate choice of the immunity tests and the immunity test limits to be applied to their equipment. Other methods, such as those covered in IEC 61000-4-3, CISPR 16-2-3 and CISPR 16-2-4 may be used.1
Elektromagnetische Verträglichkeit (EMV) - Teil 4-21: Prüf- und Messverfahren - Verfahren für die Prüfung in der Modenverwirbelungskammer
Compatibilité électromagnétique (CEM) - Partie 4-21: Techniques d'essai et de mesure - Méthodes d'essai en chambre réverbérante
La CEI 61000-4-21:2011 porte sur les essais d'immunité et d'émissions désirées ou non désirées pour les matériels électriques et/ou électroniques, et sur les essais d'efficacité d'écran dans les chambres réverbérantes. Elle établit les procédures d'essai nécessaires à la réalisation de ce type d'essais. Seuls les phénomènes rayonnés sont examinés. L'objet de la présente partie est d'établir une référence commune pour l'utilisation des chambres réverbérantes dans le but d'évaluer les performances des matériels électriques et électroniques lorsqu'ils sont soumis à des champs électromagnétiques radioélectriques et dans le but de déterminer les niveaux des rayonnements radioélectriques émis par les matériels électriques et électroniques. La CEI 61000-4-21:2011 n'est pas destinée à spécifier les essais qui doivent être appliqués à un appareil ou un système particulier. Elle vise principalement à offrir à tous les comités de produits concernés de la CEI une référence de base générale. Il convient que les comités de produits choisissent les limites d'émissions et les méthodes d'essai en concertation avec le CISPR. Les comités de produits restent responsables du choix approprié des essais d'immunité et des limites des essais d'immunité à appliquer à leurs matériels. Les autres méthodes, telles que celles couvertes dans la CEI 61000-4-3, le CISPR 16-2-3 et le CISPR 16-2-4 peuvent être utilisées. Cette deuxième édition annule et remplace la première édition parue en 2003. Cette édition constitue une révision technique et inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - A l'Article 8, l'utilisation et les spécifications de sondes de champ E pour application aux chambres réverbérantes ont été ajoutées. - L'Annexe A contient des recommandations supplémentaires et des clarifications concernant l'utilisation de chambres réverbérantes à des fréquences de fonctionnement relativement faibles (c'est-à-dire proches de la fréquence utilisable la plus faible d'une chambre donnée), et les conséquences de cette utilisation sur l'estimation de l'incertitude ont été décrites. - A l'Annexe B, l'emplacement symétrique des sondes de champ, lorsque la chambre présente une symétrie cylindrique, a été refusé dans la mesure où ce type d'emplacement est susceptible de donner une indication erronée de l'uniformité de champ et de la performance de la chambre à des emplacements différents. - L'Annexe C contient à présent davantage de recommandations quantitatives concernant le réglage des vitesses de brassage maximales admissibles qui garantissent des conditions de fonctionnement quasi-statiques pour la validation et les essais de la chambre. - A l'Annexe D, une exigence stipulant que le matériel en essai et les autres équipements ne doivent pas occuper plus de 8 % du volume total de la chambre dans les essais d'immunité a été ajoutée. - Des recommandations supplémentaires ont été ajoutées à l'Annexe E concernant la valeur de la directivité du matériel en essai à utiliser dans l'estimation de la puissance et du champ rayonnés. - Certaines clarifications concernant les mesures de rendement d'antenne ont été ajoutées en Annexe I. - Une nouvelle Annexe K a été ajoutée qui couvre l'incertitude de mesure dans les chambres réverbérantes.
Elektromagnetna združljivost (EMC) - 4-21. del: Preskusne in merilne tehnike - Preskusne metode za odbojne sobe (IEC 61000-4-21:2011)
Ta del IEC 61000 upošteva preskuse imunosti in namenske ali nenamenske emisije
za električno in/ali elektronsko opremo in preskuse za spremljanje učinkovitosti za odbojne sobe. Vzpostavlja potrebne preskusne postopke za izvedbo takih preskusov. Upoštevani so samo pojavi sevanja.
Cilj tega dela je vzpostaviti splošno referenco za uporabo odbojnih sob za določanje delovanja električne in elektronske opreme, kadar so izpostavljene radiofrekvenčnim elektromagnetnim poljem, in za določanje stopenj radiofrekvenčnega sevanja, ki ga oddaja električna ali elektronska oprema.
OPOMBA: Preskusne metode v tem delu so opredeljene za merjenje učinkov elektromagnetnega sevanja na opremo in elektromagnetnih emisij iz zadevne opreme. Simulacija in merjenje elektromagnetnega sevanja ni ustrezno za kvantitativno določevanje učinkov. Cilj opredeljenih preskusnih metod je vzpostaviti ustrezno obnovljivost in ponovljivost rezultatov preskusov in kvalitativno analizo učinkov.
Ta del IEC 61000 ni namenjen določevanju preskusov za uporabo na določeni opremi ali sistemu. Njegov glavni cilj je podati splošno osnovno referenco za vse zadevne odbore IEC za proizvode. Odbori za proizvode naj izberejo meje emisij in preskusne metode s posvetom s CISPR. Odbori za proizvode so odgovorni za primerno izbiro preskusov odpornosti in mej preskusov odpornosti, uporabljenih za njihovo opremo. Druge metode kot tiste, zajete v IEC 61000-4-3, CISPR 16-2-2, se lahko uporabijo.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 61000-4-21:2011
01-junij-2011
1DGRPHãþD
SIST EN 61000-4-21:2005
Elektromagnetna združljivost (EMC) - 4-21. del: Preskusne in merilne tehnike -
Preskusne metode za odbojne sobe (IEC 61000-4-21:2011)
Electromagnetic compatibility (EMC) - Part 4-21: Testing and measurement techniques -
Reverberation chamber test methods
Elektromagnetische Verträglichkeit (EMV) - Teil 4-21: Prüf- und Messverfahren -
Verfahren für die Prüfung in der Modenverwirbelungskammer
Compatibilité électromagnétique (CEM) - Partie 4-21: Techniques d'essai et de mesure -
Méthodes d'essai en chambre réverbérante
Ta slovenski standard je istoveten z: EN 61000-4-21:2011
ICS:
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
SIST EN 61000-4-21:2011 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 61000-4-21:2011
---------------------- Page: 2 ----------------------
SIST EN 61000-4-21:2011
EUROPEAN STANDARD
EN 61000-4-21
NORME EUROPÉENNE
April 2011
EUROPÄISCHE NORM
ICS 33.100.10; 33.100.20 Supersedes EN 61000-4-21:2003
English version
Electromagnetic compatibility (EMC) -
Part 4-21: Testing and measurement techniques -
Reverberation chamber test methods
(IEC 61000-4-21:2011)
Compatibilité électromagnétique (CEM) - Elektromagnetische Verträglichkeit
Partie 4-21: Techniques d'essai et de (EMV) -
mesure - Teil 4-21: Prüf- und Messverfahren -
Méthodes d'essai en chambre Verfahren für die Prüfung in der
réverbérante Modenverwirbelungskammer
(CEI 61000-4-21:2011) (IEC 61000-4-21:2011)
This European Standard was approved by CENELEC on 2011-03-03. 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, Croatia, 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
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61000-4-21:2011 E
---------------------- Page: 3 ----------------------
SIST EN 61000-4-21:2011
EN 61000-4-21:2011 - 2 -
Foreword
The text of document 77B/619/CDV, future edition 2 of IEC 61000-4-21, prepared by SC 77B, High
frequency phenomena, of IEC TC 77, Electromagnetic compatibility, was submitted to the IEC-CENELEC
parallel vote and was approved by CENELEC as EN 61000-4-21 on 2011-03-03.
This European Standard supersedes EN 61000-4-21:2003.
EN 61000-4-21:2011 includes the following significant technical changes with respect to
EN 61000-4-21:2003:
In Clause 8, the use and specifications of E-field probes for application to reverberation chambers has
been added. Additional Notes refer to general aspects and procedures of probe calibrations. The
specified range for linearity of the probe response is larger and covers an asymmetric interval compared
to that for use in anechoic chambers (see Annex I of EN 61000-4-3), because
– the fluctuations of power and fields in reverberation chambers exhibit a larger dynamic range, and
– the chamber validation procedure is based on using maximum field values, as opposed to the field itself
or its average value, respectively.
In Annex A, additional guidance and clarifications on the use of reverberation chambers at relatively low
frequencies of operation (i.e., close to the lowest usable frequency of a given chamber) are given, and its
implications on the estimation of field uncertainty are outlined. Guidelines on cable-layout have been
added. A rationale has been added that explains the relaxation of the field uniformity requirement below
400 MHz, being a compromise between scientific-technical and economical reasons when using
chambers around 100 MHz. A first-order correction for the threshold value of the correlation coefficient at
relatively low numbers of tuner positions has been added. Issues regarding the use of non-equidistant
tuner positions at low frequencies are discussed in an additional note.
In Annex B, symmetric location of the field probes when the chamber exhibits cylindrical symmetry has
been disallowed, as such placement could otherwise yield a false indication of field uniformity and
chamber performance at different locations. The difference between start frequency for chamber
validation and lowest test frequency has been clarified. The tuner sequencing for chamber validation and
testing is now specified to be equal in both cases. In sample requirements for chamber validation,
emphasis is now on the required minimum number of independent tuner steps to be used, whereas the
minimum recommended number of samples per frequency interval has been replaced with he number of
independent samples that the tuner can provide per frequency, for use in case when the chamber
validation fails for the required minimum number.
Annex C now contains more quantitative guidance on the setting of the maximum permissible stirring
speeds that warrant quasi-static conditions of operation for chamber validation and testing. Consideration
is given to all characteristic time scales of all components or subsystems of a measurement or test.
Specific issues relating to chamber validation, immunity testing and bandwidth are addressed. Particular
requirements for field probes when used with mode stirred operation are listed.
In Annex D, a requirement for the EUT and equipment not to occupy more than 8 % of the total chamber
volume in immunity testing has been added. The maximum number of frequency points and the formula
to calculate these points have been generalized. A mandatory specification for including the
measurement equipment, test plan and cable layout in the test report has been added to resolve any
dispute in case of discrepancies, particularly for low-frequency immunity testing.
Annex E has been extended with further guidance on the value of EUT directivity to be used in the
estimation of radiated power and field. Extended estimates have been added for the maximum directivity
of electrically large, anisotropically radiating EUTs and for radiated emissions in the presence of a ground
plane. A mandatory specification for including the measurement equipment, test plan and cable layout in
the test report has been added to resolve any dispute in case of discrepancies, particularly for
low-frequency emissions testing.
In Annex I, some clarifications on antenna efficiency measurements have been added.
---------------------- Page: 4 ----------------------
SIST EN 61000-4-21:2011
- 3 - EN 61000-4-21:2011
A new Annex K has been added that covers measurement uncertainty in reverberation chambers. The
intrinsic field uncertainty for chamber validation, immunity and emissions measurements is quantified.
Other contributors to measurement uncertainty are listed.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2011-12-03
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-03-03
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61000-4-21:2011 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 61000-4-6 NOTE Harmonized as EN 61000-4-6.
CISPR 16-1-2 NOTE Harmonized as EN 55016-1-2
CISPR 16-1-3 NOTE Harmonized as EN 55016-1-3.
CISPR 16-1-4 NOTE Harmonized as EN 55016-1-4.
CISPR 16-1-5 NOTE Harmonized as EN 55016-1-5.
CISPR 16-2-1 NOTE Harmonized as EN 55016-2-1.
CISPR 16-2-2 NOTE Harmonized as EN 55016-2-2.
CISPR 16-2-4 NOTE Harmonized as EN 55016-2-4.
CISPR 16-2-5 NOTE Harmonized as EN 55016-2-5.
CISPR 22 NOTE Harmonized as EN 55022.
__________
---------------------- Page: 5 ----------------------
SIST EN 61000-4-21:2011
EN 61000-4-21:2011 - 4 -
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
IEC 60050-161 1990 International Electrotechnical Vocabulary - -
+ A1 1997 (IEV) -
+ A2 1998 Chapter 161: Electromagnetic compatibility
IEC 60068-1 - Environmental testing - EN 60068-1 -
Part 1: General and guidance
IEC 61000-4-3 2006 Electromagnetic compatibility (EMC) - EN 61000-4-3 2006
+ A1 2007 Part 4-3: Testing and measurement + A1 2008
techniques - Radiated, radio-frequency,
electromagnetic field immunity test
CISPR 16-1-1 - Specification for radio disturbance and EN 55016-1-1 2010
immunity measuring apparatus and methods -
Part 1-1: Radio disturbance and immunity
measuring apparatus - Measuring apparatus
CISPR 16-2-3 - Specification for radio disturbance and EN 55016-2-3 2010
immunity measuring apparatus and methods -
Part 2-3: Methods of measurement of
disturbances and immunity - Radiated
disturbance measurements
---------------------- Page: 6 ----------------------
SIST EN 61000-4-21:2011
IEC 61000-4-21
®
Edition 2.0 2011-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
BASIC EMC PUBLICATION
PUBLICATION FONDAMENTALE EN CEM
Electromagnetic compatibility (EMC) –
Part 4-21: Testing and measurement techniques – Reverberation chamber test
methods
Compatibilité électromagnétique (CEM) –
Partie 4-21: Techniques d'essai et de mesure – Méthodes d'essai en chambre
réverbérante
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XE
ICS 33.100.10; 33.100.20 ISBN 978-2-88912-324-7
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN 61000-4-21:2011
– 2 – 61000-4-21 IEC:2011
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviations . 9
3.1 Terms and definitions . 9
3.2 Abbreviations . 12
4 General . 13
5 Test environments and limitations . 13
6 Applications . 14
6.1 Radiated immunity . 14
6.2 Radiated emissions . 14
6.3 Shielding (screening) effectiveness . 14
7 Test equipment . 14
8 Chamber validation. 15
9 Testing . 16
10 Test results, test report and test conditions . 16
Annex A (informative) Reverberation chamber overview . 17
Annex B (normative) Chamber validation for mode-tuned operation . 41
Annex C (normative) Chamber validation and testing for mode-stirred operation . 50
Annex D (normative) Radiated immunity tests . 56
Annex E (normative) Radiated emissions measurements . 61
Annex F (informative) Shielding effectiveness measurements of cable assemblies,
cables, connectors, waveguides and passive microwave components . 68
Annex G (informative) Shielding effectiveness measurements of gaskets and materials . 72
Annex H (informative) Shielding effectiveness measurements of enclosures . 82
Annex I (informative) Antenna efficiency measurements . 89
Annex J (informative) Direct evaluation of reverberation performance using field
anisotropy and field inhomogeneity coefficients . 91
Annex K (informative) Measurement uncertainty for chamber validation – Emission
and immunity testing . 100
Bibliography . 107
Figure A.1 – Typical field uniformity for 200 independent tuner steps . 32
Figure A.2 – Theoretical modal structure for a 10,8 m × 5,2 m × 3,9 m chamber . 32
Figure A.3 – Theoretical modal structure with small Q-bandwidth (high Q)
th
superimposed on 60 mode . 33
Figure A.4 – Theoretical modal structure with greater Q-bandwidth (lower Q)
th
superimposed on 60 mode . 33
Figure A.5 – Typical reverberation chamber facility . 34
Figure A.6 – Theoretical sampling requirements for 95 % confidence . 34
Figure A.7 – Normalized PDF of an electric field component at a fixed location for a
measurement with a single sample . 35
---------------------- Page: 8 ----------------------
SIST EN 61000-4-21:2011
61000-4-21 IEC:2011 – 3 –
Figure A.8 – Normalised PDF of the mean of an electric field component at one fixed
location for a measurement with N independent samples . 35
Figure A.9 – Normalised PDF of the maximum of an electric field component at a fixed
location for a measurement with N independent samples . 36
Figure A.10 – Chamber working volume . 37
Figure A.11 – Typical probe data . 37
Figure A.12 – Mean-normalized data for x-component of 8 probes . 38
Figure A.13 – Standard deviation of data for E-field components of 8 probes . 38
Figure A.14 – Distribution of absorbers for loading effects test . 39
Figure A.15 – Magnitude of loading from loading effects test . 39
Figure A.16 – Standard deviation data of electric field components for eight probes in
the loaded chamber . 40
Figure B.1 – Probe locations for chamber validation . 49
Figure C.1 – Received power (dBm) as a function of tuner rotation (s) at 500 MHz . 55
Figure C.2 – Received power (dBm) as a function of tuner rotation (s) at 1 000 MHz . 55
Figure D.1 – Example of suitable test facility. 60
Figure E.1 – Example of suitable test facility . 66
Figure E.2 – Relating to the calculation of the geometry factor for radiated emissions . 67
Figure F.1 – Typical test set-up . 71
Figure G.1 – Typical test set-up . 80
Figure G.2 – Typical test fixture installation for gasket and/or material testing . 80
Figure G.3 – Test fixture configured for validation . 81
Figure H.1 – Typical test enclosure installation for floor mounted enclosure testing . 88
Figure H.2 – Typical test enclosure installation for bench mounted enclosure testing . 88
Figure J.1 – Theoretical and typical measured distributions for field anisotropy
coefficients in a well-stirred chamber . 97
Figure J.2 – Theoretical and typical measured distributions for field anisotropy
coefficients in a poorly stirred chamber . 98
Figure J.3 – Typical measured values for field anisotropy coefficients as a function of
N in a well-stirred chamber . 99
Figure K.1 – Average emitted power as a function of frequency for a typical
unintentional radiator . 105
Figure K.2 – Estimated standard uncertainty . 105
Figure K.3 – Mean normalized width (in dB) of a η%-confidence interval . 106
Figure K.4 – Individual mean-normalized interval boundaries (in linear units) for
maximum field strength as a function of the number of independent stirrer positions N . 106
Table B.1 – Sampling requirements . 48
Table B.2 – Field uniformity tolerance requirements . 48
Table J.1 – Typical values for total field anisotropy coefficients for ‘medium’ and ‘good’
reverberation quality . 96
---------------------- Page: 9 ----------------------
SIST EN 61000-4-21:2011
– 4 – 61000-4-21 IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROMAGNETIC COMPATIBILITY (EMC) –
Part 4-21: Testing and measurement techniques –
Reverberation chamber test methods
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 61000-4-21 has been prepared by subcommittee 77B: High
frequency phenomena, of IEC technical committee 77: Electromagnetic compatibility, in co-
operation with CISPR subcommittee A: Radio-interference measurements and statistical
methods.
It forms Part 4-21 of IEC 61000. It has the status of a basic EMC publication in accordance
with IEC Guide 107.
This second edition cancels and replaces the first edition published in 2003. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the first
edition.
• In Clause 8, the use and specifications of E-field probes for application to reverberation
chambers has been added. Additional Notes refer to general aspects and procedures of
---------------------- Page: 10 ----------------------
SIST EN 61000-4-21:2011
61000-4-21 IEC:2011 – 5 –
probe calibrations. The specified range for linearity of the probe response is larger and
covers an asymmetric interval compared to that for use in anechoic chambers (see
Annex I of IEC 61000-4-3), because
– the fluctuations of power and fields in reverberation chambers exhibit a larger dynamic
range, and
– the chamber validation procedure is based on using maximum field values, as opposed
to the field itself or its average value,
respectively.
• In Annex A, additional guidance and clarifications on the use of reverberation chambers at
relatively low frequencies of operation (i.e., close to the lowest usable frequency of a given
chamber) are given, and its implications on the estimation of field uncertainty are outlined.
Guidelines on cable-layout have been added. A rationale has been added that explains the
relaxation of the field uniformity requirement below 400 MHz, being a compromise between
scientific-technical and economical reasons when using chambers around 100 MHz. A first-order
correction for the threshold value of the correlation coefficient at relatively low numbers of tuner
positions has been added. Issues regarding the use of non-equidistant tuner positions at low
frequencies are discussed in an additional Note.
• In Annex B, symmetric location of the field probes when the chamber exhibits cylindrical
symmetry has been disallowed, as such placement could otherwise yield a false indication of
field uniformity and chamber performance at different locations. The difference between start
frequency for chamber validation and lowest test frequency has been clarified. The tuner
sequencing for chamber validation and testing is now specified to be equal in both cases. In
sample requirements for chamber validation, emphasis is now on the required minimum number of
independent tuner steps to be used, whereas the minimum recommended number of samples per
frequency interval has been replaced with he number of independent samples that the tuner can
provide per frequency, for use in case when the chamber validation fails for the required minimum
number.
• Annex C now contains more quantitative guidance on the setting of the maximum
permissible stirring speeds that warrant quasi-static conditions of operation for chamber
validation and testing. Consideration is given to all characteristic time scales of all
components or subsystems of a measurement or test. Specific issues relating to chamber
validation, immunity testing and bandwidth are addressed. Particular requirements for field
probes when used with mode stirred operation are listed.
• In Annex D, a requirement for the EUT and equipment not to occupy more than 8 % of the
total chamber volume in immunity testing has been added. The maximum number of
frequency points and the formula to calculate these points have been generalized. A
mandatory specification for including the measurement equipment, test plan and cable
layout in the test report has been added to resolve any dispute in case of discrepancies,
particularly for low-frequency immunity testing.
• Annex E has been extended with further guidance on the value of EUT directivity to be
used in the estimation of radiated power and field. Extended estimates have been added
for the maximum directivity of electrically large, anisotropically radiating EUTs and for
radiated emissions in the presence of a ground plane. A mandatory specification for
including the measurement equipment, test plan and cable layout in the test report has
been added to resolve any dispute in case of discrepancies, particularly for low-frequency
emissions testing.
• In Annex I, some clarifications on antenna efficiency measurements have been added.
• A new Annex K has been added that covers measurement uncertainty in reverberation
chambers. The intrinsic field uncertainty for chamber validation, immunity and emissions
measurements is quantified. Other contributors to measurement uncertainty are listed.
---------------------- Page: 11 ----------------------
SIST EN 61000-4-21:2011
– 6 – 61000-4-21 IEC:2011
The text of this standard is based on the following documents:
CDV Report on voting
77B/619/CDV 77B/640/RVC
Full information on the voting for the approval of this standard can be found in
...
SLOVENSKI STANDARD
oSIST FprEN 61000-4-21:2010
01-januar-2010
Elektromagnetna združljivost (EMC) - 4-21. del: Preskusne in merilne tehnike -
Preskusne metode za odbojne sobe
Electromagnetic compatibility (EMC) -- Part 4-21: Testing and measurement techniques -
Reverberation chamber test methods
Ta slovenski standard je istoveten z: FprEN 61000-4-21:2009
ICS:
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
oSIST FprEN 61000-4-21:2010 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST FprEN 61000-4-21:2010
---------------------- Page: 2 ----------------------
oSIST FprEN 61000-4-21:2010
77B/619/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
®
PROJET DE COMITÉ POUR VOTE (CDV)
Project number IEC 61000-4-21 Ed 2.0
Numéro de projet
Secretariat / Secrétariat
IEC/TC or SC:
77B
France
CEI/CE ou SC:
Date of circulation Closing date for voting (Voting
Submitted for parallel voting in
Date de diffusion mandatory for P-members)
CENELEC
Date de clôture du vote (Vote
2009-10-23
obligatoire pour les membres (P))
Soumis au vote parallèle au
CENELEC 2010-03-26
Also of interest to the following committees Supersedes document
Intéresse également les comités suivants Remplace le document
CISPR/A 77B/576/CD & 77B/589A/CC
Proposed horizontal standard
Norme horizontale suggérée
Other TC/SCs are requested to indicate their interest, if any, in this CDV to the TC/SC secretary
Les autres CE/SC sont requis d’indiquer leur intérêt, si nécessaire, dans ce CDV à l’intention du secrétaire du CE/SC
Functions concerned
Fonctions concernées
Safety EMC Environment Quality assurance
Sécurité
CEM Environnement Assurance qualité
CE DOCUMENT EST TOUJOURS À L'ÉTUDE ET SUSCEPTIBLE DE THIS DOCUMENT IS STILL UNDER STUDY AND SUBJECT TO CHANGE. IT
MODIFICATION. IL NE PEUT SERVIR DE RÉFÉRENCE. SHOULD NOT BE USED FOR REFERENCE PURPOSES.
LES RÉCIPIENDAIRES DU PRÉSENT DOCUMENT SONT INVITÉS À RECIPIENTS OF THIS DOCUMENT ARE INVITED TO SUBMIT, WITH THEIR
PRÉSENTER, AVEC LEURS OBSERVATIONS, LA NOTIFICATION DES COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF
DROITS DE PROPRIÉTÉ DONT ILS AURAIENT ÉVENTUELLEMENT WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING
CONNAISSANCE ET À FOURNIR UNE DOCUMENTATION EXPLICATIVE. DOCUMENTATION.
Titre : CEI 61000-4-21 - COMPATIBILITE Title : IEC 61000-4-21 - ELECTROMAGNETIC
ELECTROMAGNETIQUE (CEM) - Partie 4-21: COMPATIBILITY (EMC) – Part 4-21:Testing and
Techniques d'essai et de mesure - Méthodes measurement techniques – Reverberation
d'essais en chambres réverbérantes chamber test methods
Note d'introduction Introductory note
Ce CDV a été préparé par la JTF REV commune aux This CDV has been prepared by the JTF REV which is
CISPR/A et SC 77B. common to CISPR/A and SC 77B.
Le SC 77B a la responsabilité administrative de ce projet, SC 77B is responsible for this project from an
aussi il est demandé aux comités nationaux de fournir leurs administrative standpoint, so national committees are
commentaires et votes au travers de leur comité miroir du requested to provide their comments and votes via their
SC 77B. SC 77B mirror committee.
Les comités miroirs du CISPR/A doivent donner leurs CISPR/A mirror committees must give their comments to
commentaires à leurs collègues des comités miroirs du their colleagues of SC 77B mirror committees which then
SC 77B, qui alors fourniront une compilation consolidée will provide a consolidated compilation of comments to the
des commentaires à la CEI. IEC.
Merci de respecter ces demandes. Thank you for respecting these requirements.
La version française sera diffusée dans au plus 60 The French version will be circulated within 60 days.
jours.
ATTENTION ATTENTION
VOTE PARALLÈLE IEC – CENELEC
CEI – CENELEC PARALLEL VOTING
L’attention des Comités nationaux de la CEI, membres du The attention of IEC National Committees, members of
CENELEC, est attirée sur le fait que ce projet de comité CENELEC, is drawn to the fact that this Committee Draft for
pour vote (CDV) de Norme internationale est soumis au Vote (CDV) for an International Standard is submitted for
vote parallèle. parallel voting.
Les membres du CENELEC sont invités à voter via le The CENELEC members are invited to vote through the
système de vote en ligne du CENELEC. CENELEC online voting system.
Copyright © 2009 International Electrotechnical Commission, IEC. All rights reserved. It is
permitted to download this electronic file, to make a copy and to print out the content for the sole
purpose of preparing National Committee positions. You may not copy or "mirror" the file or
printed version of the document, or any part of it, for any other purpose without permission in
writing from IEC.
---------------------- Page: 3 ----------------------
oSIST FprEN 61000-4-21:2010
2
61000-4-21 Ed.2/CDV © IEC:200X – –
1 CONTENTS
2 FOREWORD.5
3 INTRODUCTION.8
4 1 Scope.9
5 2 Normative references .9
6 3 Definitions and acronyms .10
7 3.1 Definitions .10
8 3.2 Acronyms .13
9 4 General .14
10 5 Test environments and limitations .14
11 6 Applications.15
12 6.1 Radiated immunity.15
13 6.2 Radiated emissions .15
14 6.3 Screening effectiveness measurements.15
15 7 Test equipment.15
16 8 Chamber validation.16
17 9 Testing .17
18 10 Test results, test report and test conditions .17
19
20
21 Annex A (informative) Reverberation chamber overview .18
22 Annex B (normative) Chamber validation for mode-tuned operation .42
23 Annex C (normative) Chamber validation and testing for mode-stirred operation.51
24 Annex D (normative) Radiated immunity tests.57
25 Annex E (normative) Radiated emissions measurements .62
26 Annex F (informative) Shielding effectiveness measurements of cable assemblies,
27 cables, connectors, waveguides and passive microwave components .69
28 Annex G (informative) Shielding effectiveness measurements of gaskets and materials.73
29 Annex H (informative) Shielding effectiveness measurements of enclosures.84
30 Annex I (informative) Antenna efficiency measurements .91
31 Annex J (informative) Direct evaluation of reverberation performance using field
32 anisotropy and field inhomogeneity coefficients .93
33 Annex K (informative) Measurement Uncertainty for Chamber Validation, Emission
34 and Immunity Testing .102
35
36
37 Figure A.1 – Typical field uniformity for 200 independent tuner steps.33
38 Figure A.2 – Theoretical modal structure for a 10,8 m × 5,2 m × 3,9 m chamber .33
39 Figure A.3 – Theoretical modal structure with small Q-bandwidth (high Q)
th
40 superimposed on 60 mode.34
41 Figure A.4 – Theoretical modal structure with greater Q-bandwidth (lower Q)
th
42 mode.34
superimposed on 60
43 Figure A.5 – Typical reverberation chamber facility.35
44 Figure A.6 – Theoretical sampling requirements for 95 % confidence [see equation
45 (A.3) on calculating M].36
46 Figure A.7 – Normalized PDF of an electric field component at a fixed location for a
47 measurement with a single sample .36
---------------------- Page: 4 ----------------------
oSIST FprEN 61000-4-21:2010
3
61000-4-21 Ed.2/CDV © IEC:200X – –
48 Figure A.8 – Normalised PDF of the mean of an electric field component at one fixed
49 location for a measurement with N independent samples.37
50 Figure A.9 – Normalised PDF of the maximum of an electric field component at a fixed
51 location for a measurement with N independent samples.37
52 Figure A.10 – Chamber working volume.38
53 Figure A.11 – Typical probe data .39
54 Figure A.12 – Mean-normalized data for x-component of 8 probes.39
55 Figure A.13 – Standard deviation of data for E-field components of 8 probes.40
56 Figure A.14 – Distribution of absorbers for loading effects test .40
57 Figure A.15 – Magnitude of loading from loading effects test .41
58 Figure A.16 – Standard deviation data of electric field components for eight probes in
59 the loaded chamber.41
60 Figure B.1 – Probe locations for chamber validation .50
61 Figure C.1 – Received power (dBm) as a function of tuner rotation (s) at 500 MHz .56
62 Figure C.2 – Received power (dBm) as a function of tuner rotation (s) at 1000 MHz .56
63 Figure D.1 – Example of suitable test facility.61
64 Figure E.1 – Example of suitable test facility.67
65 Figure E.2 – Relating to the calculation of the geometry factor for radiated emissions .68
66 Figure F.1 – Typical test set-up .72
67 Figure G.1 – Typical test set-up .81
68 Figure G.2 – Typical test fixture installation for gasket and/or material testing .82
69 Figure G.3 – Test fixture configured for validation.83
70 Figure H.1 – Typical test enclosure installation for floor mounted enclosure testing .90
71 Figure H.2 – Typical test enclosure installation for bench mounted enclosure testing.90
72 Figure J.1 – Theoretical and typical measured distributions for field anisotropy
73 coefficients in a well-stirred chamber.99
74 Figure J.2 – Theoretical and typical measured distributions for field anisotropy
75 coefficients in a poorly stirred chamber .100
76 Figure J.3 – Typical measured values for field anisotropy coefficients as a function of
77 N in a well-stirred chamber.101
78 Figure K.1: Average emitted power as a function of frequency for a typical
79 unintentional radiator [4], [8].108
80 Figure K.2: Estimated standard uncertainty, normalized with respect to average value:
81 (a) for radiated power emitted by EUT and (b) for associated average radiated
82 power, compared to theoretical standard uncertainties for ideal chamber
83 characteristics √2 and √(2/100), respectively. Measured resp. idealized
84 correlations between S-parameters are taken into account in both cases. .108
+ -
85 Figure K.3: (a) Mean-normalized width (ξ -ξ )/〈|E | 〉 (in dB) for a η%-
η% η% x max
86 confidence interval for maximum field strength |E | for a specified number of
x max
87 independent stirrer positions N. (b) Same as (a) but for the average maximum
88 received power 〈P 〉 .109
x,max .
89 Figure K.4: Mean-normalized interval boundaries and required number of independent
90 stirrer positions N for a η%-confidence interval for |E | having normalized width
x max
+ -
91 (ξ -ξ )/〈|E | 〉. .109
η% η% x max
92
93
94 Table B.1 – Sampling requirements .49
95 Table B.2 – Field uniformity tolerance requirements.49
---------------------- Page: 5 ----------------------
oSIST FprEN 61000-4-21:2010
4
61000-4-21 Ed.2/CDV © IEC:200X – –
96 Table J.1 – Typical values for total field anisotropy coefficients for ‘medium’ and
97 ‘good’ reverberation quality .98
---------------------- Page: 6 ----------------------
oSIST FprEN 61000-4-21:2010
5
61000-4-21 Ed.2/CDV © IEC:200X – –
98 INTERNATIONAL ELECTROTECHNICAL COMMISSION
99 ____________
100
101 ELECTROMAGNETIC COMPATIBILITY (EMC) –
102
103 Part 4-21: Testing and measurement techniques –
104 Reverberation chamber test methods
105
106
107 FOREWORD
108 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
109 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
110 international co-operation on all questions concerning standardization in the electrical and electronic fields. To
111 this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
112 Technical Reports, and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to
113 technical committees; any IEC National Committee interested in the subject dealt with may participate in this
114 preparatory work. International, governmental and non-governmental organizations liaising with the IEC also
115 participate in this preparation. IEC collaborates closely with the International Organization for Standardization
116 (ISO) in accordance with conditions determined by agreement between the two organizations.
117 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
118 consensus of opinion on the relevant subjects since each technical committee has representation from all
119 interested IEC National Committees.
120 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
121 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
122 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
123 misinterpretation by any end user.
124 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
125 transparently to the maximum extent possible in their national and regional publications. Any divergence
126 between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
127 the latter.
128 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
129 equipment declared to be in conformity with an IEC Publication.
130 6) All users should ensure that they have the latest edition of this publication.
131 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
132 members of its technical committees and IEC National Committees for any personal injury, property damage or
133 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
134 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
135 Publications.
136 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
137 indispensable for the correct application of this publication.
138 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
139 patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
140 International Standard IEC 61000-4-21 has been prepared by subcommittee 77B: High-
141 frequency phenomena, of IEC technical committee 77: Electromagnetic compatibility, in co-
142 operation with CISPR subcommittee A: Radio interference measurements and statistical
143 methods.
144 It forms Part 4-21 of IEC 61000. It has the status of a basic EMC publication in accordance
145 with IEC Guide 107.
146 The main changes with respect to the first edition of this standard are the following:
147 • In Clause 8, the use and specifications of E-field probes for application to
148 reverberation chambers has been added. Additional Notes refer to general aspects
149 and procedures of probe calibrations. The specified range for linearity of the probe
150 response is larger and covers an asymmetric interval compared to that for use in
151 anechoic chambers (see Annex I of IEC 61000-4-3), because
152 o the fluctuations of power and fields in reverberation chambers exhibit a larger
153 dynamic range, and
---------------------- Page: 7 ----------------------
oSIST FprEN 61000-4-21:2010
6
61000-4-21 Ed.2/CDV © IEC:200X – –
154 o the chamber validation procedure is based on using maximum field values, as
155 opposed to the field itself or its average value,
156 respectively.
157 • In Annex A, additional guidance and clarifications on the use of reverberation
158 chambers at relatively low frequencies of operation (i.e., close to the lowest usable
159 frequency of a given chamber) are given, and its implications on the estimation of field
160 uncertainty are outlined. Guidelines on cable-layout have been added. A rationale has been
161 added that explains the relaxation of the field uniformity requirement below 400 MHz, being a
162 compromise between scientific-technical and economical reasons when using chambers
163 around 100 MHz. A first-order correction for the threshold value of the correlation coefficient at
164 relatively low numbers of tuner positions has been added. Issues regarding the use of non-
165 equidistant tuner positions at low frequencies are discussed in an additional Note.
166 • In Annex B, symmetric location of the field probes when the chamber exhibits
167 cylindrical symmetry has been disallowed, as such placement could otherwise yield a
168 false indication of field uniformity and chamber performance at different locations. The
169 difference between start frequency for chamber validation and lowest test frequency has been
170 clarified. The tuner sequencing for chamber validation and testing is now specified to be equal
171 in both cases. In sample requirements for chamber validation, emphasis is now on the
172 required minimum number of independent tuner steps to be used, whereas the minimum
173 recommended number of samples per frequency interval has been replaced with he number
174 of independent samples that the tuner can provide per frequency, for use in case when the
175 chamber validation fails for the required minimum number.
176 • Annex C now contains more quantitative guidance on the setting of the maximum
177 permissible stirring speeds that warrant quasi-static conditions of operation for
178 chamber validation and testing. Consideration is given to all characteristic time scales
179 of all components or subsystems of a measurement or test. Specific issues relating to
180 chamber validation, immunity testing and bandwidth are addressed. Particular
181 requirements for field probes when used with mode stirred operation are listed.
182 • In Annex D, a requirement for the EUT and equipment not to occupy more than 8 % of
183 the total chamber volume in immunity testing has been added. The maximum number
184 of frequency points and the formula to calculate these points have been generalized. A
185 mandatory specification for including the measurement equipment, test plan and cable
186 layout in the test report has been added to resolve any dispute in case of
187 discrepancies, particularly for low-frequency immunity testing.
188 • Annex E has been extended with further guidance on the value of EUT directivity to be
189 used in the estimation of radiated power and field. Extended estimates have been
190 added for the maximum directivity of electrically large, anisotropically radiating EUTs
191 and for radiated emissions in the presence of a ground plane. A mandatory
192 specification for including the measurement equipment, test plan and cable layout in
193 the test report has been added to resolve any dispute in case of discrepancies,
194 particularly for low-frequency emissions testing.
195 • In Annex I, some clarifications on antenna efficiency measurements have been added.
196 • A new Annex K has been added that covers measurement uncertainty in reverberation
197 chambers. The intrinsic field uncertainty for chamber validation, immunity and
198 emissions measurements is quantified. Other contributors to measurement uncertainty
199 are listed.
---------------------- Page: 8 ----------------------
oSIST FprEN 61000-4-21:2010
7
61000-4-21 Ed.2/CDV © IEC:200X – –
200 The text of this standard is based on the following documents:
FDIS Report on voting
77B/ /FDIS 77B/ /RVD
201 Full information on the voting for the approval of this standard can be found in the report on
202 voting indicated in the above table.
203 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
204 The committee has decided that the contents of the base publication will remain unchanged
)
1
205 until the maintenance result date indicated on the IEC web site under
206 "http://webstore.iec.ch" in the data related to the specific publication. At this date, the
207 publication will be
208 • reconfirmed;
209 • withdrawn;
210 • replaced by a revised edition, or
211 • amended.
—————————
)
1
The National Committees are requested to note that for this publication the maintenance result date is 2015.
---------------------- Page: 9 ----------------------
oSIST FprEN 61000-4-21:2010
8
61000-4-21 Ed.2/CDV © IEC:200X – –
212 INTRODUCTION
213 IEC 61000 is published in separate parts according to the following structure:
214
215 Part 1: General
216 General considerations (introduction, fundamental principles)
217 Definitions, terminology
218
219 Part 2: Environment
220 Description of the environment
221 Classification of the environment
222 Compatibility levels
223
224 Part 3: Limits
225 Emission limits
226 Immunity limits (in so far as they do not fall under the responsibility of the product
227 committees)
228
229 Part 4: Testing and measurement techniques
230 Measurement techniques
231 Testing techniques
232
233 Part 5: Installation and mitigation guidelines
234 Installation guidelines
235 Mitigation methods and devices
236
237 Part 6: Generic standards
238
239 Part 9: Miscellaneous
240
241 Each part is further subdivided into several parts, published either as international standards
242 or as technical specifications or technical reports, some of which have already been published
243 as sections. Others will be published with the part number followed by a dash and a second
244 number identifying the subdivision (example: IEC 61000-6-1).
---------------------- Page: 10 ----------------------
oSIST FprEN 61000-4-21:2010
9
61000-4-21 Ed.2/CDV © IEC:200X – –
245 ELECTROMAGNETIC COMPATIBILITY (EMC) –
246
247 Part 4-21: Testing and measurement techniques –
248 Reverberation chamber test methods
249
250
251 1 Scope
252 This part of IEC 61000 considers tests of immunity and intentional or unintentional emissions
253 for electric and/or electronic equipment and tests of screening effectiveness in reverberation
254 chambers. It establishes the required test procedures for performing such tests. Only radiated
255 phenomena are considered.
256 The objective of this part is to establish a common reference for using reverberation
257 chambers to evaluate the performance of electric and electronic equipment when subjected to
258 radio-frequency electromagnetic fields and for determining the levels of radio-frequency
259 radiation emitted from electric and electronic equipment.
260 NOTE Test methods are defined in this part for measuring the effect of electromagnetic radiation on equipment
261 and the electromagnetic emissions from equipment concerned. The simulation and measurement of
262 electromagnetic radiation is not adequate for quantitative determination of effects. The defined test methods are
263 organized with the aim to establish adequate reproducibility and repeatability of test results and qualitative analysis
264 of effects.
265 This part of IEC 61000 does not intend to specify the tests to be applied to a particular
266 apparatus or system. Its main aim is to give a general basic reference to all concerned
267 product committees of the IEC. The product committees should select emission limits and test
268 methods in consultation with CISPR. The product committees remain responsible for the
269 appropriate choice of the immunity tests and the immunity test limits to be applied to their
270 equipment. Other methods, such as those covered in IEC 61000-4-3 and CISPR-16-2-3&4
271 may be used in consultation with CISPR and TC77, if specified by product committees.
272 2 Normative references
273 The following referenced documents are indispensable for the application of this document.
274 For dated references, only the edition cited applies. For undated references, the latest edition
275 of the referenced document (including any amendments) applies.
276 IEC 60050(161):1990, International Electrotechnical Vocabulary (IEV) – Chapter 161:
277 Electromagnetic compatibility
278 IEC 60068-1, Environmental testing – Part 1: General and guidance
279 IEC 61000-4-3, Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurement
280 techniques – Radiated, radio-frequency, electromagnetic field immunity test
281 IEC 61000-4-6, Electromagnetic compatibility (EMC) – Part 4-6: Testing and measurement
282 techniques – Immunity to conducted disturbances, induced by radio-frequency fields
283 CISPR 16-1, Specification for radio disturbance and immunity measuring apparatus and
284 methods – Part 1: Radio disturbance and immunity measuring apparatus
285 CISPR 16-2, Specification for radio disturbance and immunity measuring apparatus and
286 methods – Part 2: Methods of measurement of disturbances and immunity
---------------------- Page: 11 ----------------------
oSIST FprEN 61000-4-21:2010
10
61000-4-21 Ed.2/CDV © IEC:200X – –
287 3 Definitions and acronyms
288 3.1 Definitions
289 For the purposes of this part of IEC 61000-4, the following definitions together with those in
290 IEC 60050(161) apply.
291
292 3.1.1
293 antenna
294 that part of a radio transmitting or receiving system which is designed to provide the required
295 coupling between a transmitter or a receiver and the medium in which
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.