EN 61000-4-21:2003
(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
Considers immunity and wanted and unwanted emissions tests for electric and/or electronic equipment and screening effectiveness tests. Only radiated phenomena are considered. It establishes the required test procedures for using reverberation chambers for performing radiated immunity, radiated emissions and screening effectiveness testing. Establishes 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. 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 electro-magnetic radiation is not adequately exact for quantitative determination of effects. The test methods defined are structured for the primary objective of establishing adequate repeatability of results at various test facilities for qualitative analysis of effects.
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
Porte sur les essais d'immunité et d'émissions désirées et non désirées pour les matériels électriques et/ou électroniques, et sur les essais d'efficacité d'écran. Seuls les phénomènes rayonnés sont examinés. Etablit les procédures d'essai nécessaires à l'utilisation de chambres réverbérantes pour la réalisation des essais d'immunité aux champs rayonnés, d'émissions rayonnées et d'efficacité d'écran. Etablit 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. Des méthodes d'essai sont définies dans cette partie pour mesurer l'effet des rayonnements électromagnétiques sur les matériels et celui des émissions électromagnétiques provenant des matériels concernés. La simulation et la mesure des rayonnements électromagnétiques ne présentent pas l'exactitude adéquate pour la détermination quantitative des effets. Les méthodes d'essai définies sont structurées avec comme objectif essentiel d'établir une reproductibilité adaptée des résultats en plusieurs installations d'essai pour l'analyse qualitative des effets.
Elektromagnetna združljivost (EMC) – 4-21. del: Preskusne in merilne tehnike – Preskusne metode za odbojne sobe
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Standards Content (Sample)
SLOVENSKI SIST EN 61000-4-21:2005
STANDARD
julij 2005
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
ICS 33.100.01 Referenčna številka
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
EUROPEAN STANDARD EN 61000-4-21
NORME EUROPÉENNE
EUROPÄISCHE NORM October 2003
ICS 33.100.10; 33.100.20
English version
Electromagnetic compatibility (EMC)
Part 4-21: Testing and measurement techniques –
Reverberation chamber test methods
(IEC 61000-4-21:2003)
Compatibilité électromagnétique (CEM) Elektromagnetische Verträglichkeit (EMV)
Partie 4-21: Techniques d'essai Teil 4-21: Prüf- und Messverfahren -
et de mesure – Verfahren für die Prüfung
Méthodes d'essai en chambre in der Modenverwirbelungskammer
réverbérante (IEC 61000-4-21:2003)
(CEI 61000-4-21:2003)
This European Standard was approved by CENELEC on 2003-10-01. 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, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and 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
© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61000-4-21:2003 E
Foreword
The text of document CISPR/A/455/FDIS, future edition 1 of IEC 61000-4-21, prepared by
CISPR SC A, Radio-interference measurements and statistical methods, in cooperation with 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 2003-10-01.
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) 2004-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2006-10-01
Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annexes B, C, D, E and ZA are normative and annexes A, F, G, H, I, J are
informative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61000-4-21:2003 was approved by CENELEC as a
European Standard without any modification.
__________
- 3 - EN 61000-4-21:2003
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
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 (IEV)
Chapter 161: Electromagnetic
compatibility
1) 2)
IEC 60068-1 - Environmental testing EN 60068-1 1994
Part 1: General and guidance
1) 2)
IEC 61000-4-3 - Electromagnetic compatibility (EMC) EN 61000-4-3 2002
Part 4-3: Testing and measurement
techniques - Radiated, radio-frequency,
electromagnetic field immunity test
1)
IEC 61000-4-6 - Part 4-6: Testing and measurement - -
techniques - Immunity to conducted
disturbances, induced by radio-
frequency fields
1)
CISPR 16-1 - Specification for radio disturbance and - -
immunity measuring apparatus and
methods
Part 1: Radio disturbance and immunity
measuring apparatus
1)
CISPR 16-2 - Part 2: Methods of measurement of - -
disturbances and immunity
1)
Undated reference.
2)
Valid edition at date of issue.
NORME CEI
INTERNATIONALE
IEC
61000-4-21
INTERNATIONAL
Première édition
STANDARD
First edition
2003-08
PUBLICATION FONDAMENTALE EN CEM
BASIC EMC PUBLICATION
Compatibilité électromagnétique (CEM) –
Partie 4-21:
Techniques d'essai et de mesure –
Méthodes d'essai en chambre réverbérante
Electromagnetic compatibility (EMC) –
Part 4-21:
Testing and measurement techniques –
Reverberation chamber test methods
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61000-4-21 © IEC:2003 – 3 –
CONTENTS
FOREWORD . 7
INTRODUCTION .11
1 Scope .13
2 Normative references.13
3 Definitions and acronyms .15
4 General.21
5 Test environments and limitations .23
6 Applications .23
7 Test equipment .25
8 Chamber calibration .27
9 Testing .29
10 Test results, test report and test conditions .29
Annex A (informative) Reverberation chamber overview.31
Annex B (normative) Chamber calibration for mode-tuning.79
Annex C (normative) Chamber calibration for mode-stirring.99
Annex D (normative) Radiated immunity tests .109
Annex E (normative) Radiated emissions measurements .119
Annex F (informative) Shielding effectiveness measurements of cable assemblies,
cables, connectors, waveguides and passive microwave components .129
Annex G (informative) Shielding effectiveness measurements of gaskets and materials .137
Annex H (informative) Shielding effectiveness measurements of enclosures .161
Annex I (informative) Antenna efficiency measurements .177
Annex J (informative) Direct evaluation of reverberation performance using field
anisotropy and field inhomogeneity coefficients.181
Figure A.1 – Typical field uniformity for 200 tuner steps .57
Figure A.2 – Theoretical modal structure for a 10,8 m × 5,2 m × 3,9 m chamber.57
Figure A.3 – Theoretical modal structure with quality factor bandwidth superimposed on
60th mode .59
Figure A.4 – Theoretical modal structure with greater quality factor bandwidth (lower Q)
th
superimposed on 60 mode.59
Figure A.5 – Typical reverberation chamber facility .61
Figure A.6 – Theoretical sampling requirements for 95 % confidence [see equation
(A.3) on calculating mode density] .63
Figure A.7 – Theoretical sampling requirements for reduced confidence .65
Figure A.8 – Normalized PDF of an electric field component at a fixed location for a
measurement with a single sample .65
Figure A.9 – Normalized PDF of the mean of an electric field component at a fixed
location for a measurement with N samples .67
61000-4-21 © IEC:2003 – 5 –
Figure A.10 – Normalized PDF of the maximum of an electric field component at a fixed
location for a measurement with N samples .67
Figure A.11 – Chamber working volume.69
Figure A.12 – Typical probe data .71
Figure A.13 – Mean-normalized data for x component of 8 probes .73
Figure A.14 – Standard deviation of data for E-field components of 8 probes .73
Figure A.15 – Distribution of absorbers for loading effects test.75
Figure A.16 – Magnitude of loading from loading effects test.75
Figure A.17 – Standard deviation data for electric field components of eight probes in
the loaded chamber.77
Figure B.1 – Probe locations for chamber calibration .97
Figure C.1 – Received power (dBm) as a function of tuner rotation (s) at 500 MHz .107
Figure C.2 – Received power (dBm) as a function of tuner rotation (s) at 1 000 MHz .107
Figure D.1 – Example of suitable test facility.117
Figure E.1 – Example of suitable test facility.127
Figure F.1 – Typical test set-up .135
Figure G.1 – Typical test set-up .155
Figure G.2 – Typical test fixture installation for gasket and/or material testing .157
Figure G.3 – Test fixture configured for calibration.159
Figure H.1 – Typical test enclosure installation for floor mounted enclosure testing .173
Figure H.2 – Typical test enclosure installation for bench mounted enclosure testing.175
Figure J.1 – Theoretical and typical measured distributions for field anisotropy
coefficients in a well-stirred chamber .195
Figure J.2 – Theoretical and typical measured distributions for field anisotropy
coefficients in a poorly stirred chamber.197
Figure J.3 – Typical measured values for field anisotropy coefficients as a function of N
in a well-stirred chamber .199
Figure J.4 – Typical measured values for field anisotropy coefficients as a function of N
in a poorly stirred chamber .201
Table A.1 – Sampling requirements .45
Table B.1 – Sampling requirements .95
Table B.2 – Field
...
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