Specification for radio disturbance and immunity measuring apparatus and methods - Part 4-2: Uncertainties, statistics and limit modelling - Measurement instrumentation uncertainty

This part of CISPR 16-4 specifies the method of applying Measurement Instrumentation Uncertainty (MIU) when determining compliance with CISPR disturbance limits. The material is also relevant to any EMC test when interpretation of the results and conclusions reached will be impacted by the uncertainty of the measurement instrumentation used during testing. NOTE In accordance with IEC Guide 107, CISPR 16-4-2 is a basic EMC standard for use by product committees of the IEC. As stated in Guide 107, product committees are responsible for determining the applicability of the EMC standard. CISPR and its sub-committees are prepared to co-operate with technical committees and product committees in the evaluation of the applicability of this standard for specific products. The annexes contain the background material used in providing the amount of MIU found in generating the CISPR values shown in Clauses 4 through 8 and hence provide valuable background material for those needing both initial and further information on MIU and how to take individual uncertainties in the measurement chain into account. The annexes, however, are not intended to be a tutorial or user manual or to be copied when making uncertainty calculations. For that purpose, the references shown in the bibliography, or other widely
recognized documents, may be used. Measurement instrumentation specifications are given in the CISPR 16-1 series, while the methods of measurement are covered in the CISPR 16-2 series. Further information and background on CISPR and radio disturbances is given in CISPR 16-3. The other parts of the
CISPR 16-4 series contain further information on uncertainties in general, statistics and limit modelling. See the introduction of this part for more information on the background and on the content of the CISPR 16-4 series.

Anforderungen an Geräte und Einrichtungen sowie Festlegung der Verfahren zur Messung der hochfrequenten Störaussendung (Funkstörungen) und Störfestigkeit - Teil 4-2: Unsicherheiten, Statistik und Modelle zur Ableitung von Grenzwerten (Störmodell) - Messgeräte-Unsicherheit (CISPR 16-4-2:2011)

Spécifications des méthodes et des appareils de mesure des perturbations radioélectriques et de l'immunité aux perturbations radioélectriques - Partie 4-2: Incertitudes, statistiques et modélisation des limites - Incertitudes de mesure de l'instrumentation

La CISPR 16-4-2:2011 est une publication fondamentale en CEM. Elle spécifie la méthode d'application de l'incertitude de mesure de l'instrumentation (MIU) à la détermination de la conformité aux limites de perturbation du CISPR. Cela s'applique également à tous les essais CEM lorsque l'interprétation des résultats et les conclusions peuvent être influencées par l'incertitude de l'instrumentation de mesure utilisée pendant les essais. Cette deuxième édition constitue une révision technique. Elle inclut les modifications techniques majeures concernant les méthodes de mesure des perturbations conduites via les accès secteur et les accès télécommunication, ainsi que concernant les méthodes de mesure des perturbations rayonnées au moyen d'une FAR, dans la gamme de fréquences de 30 MHz à 1 000 MHz et de 1 GHz à 18 GHz. Les annexes contiennent les éléments de référence utilisés pour fournir la quantité de MIU trouvée dans l'élaboration des valeurs CISPR indiquées dans le document principal, et en conséquence, fournissent également des informations importantes pour ceux qui ont besoin à la fois d'informations initiales et complémentaires sur les MIU et sur la façon de prendre en compte les incertitudes individuelles dans la chaîne de mesure. Toutefois, les annexes ne sont pas destinées à être un modèle didactique ou un manuel d'utilisateur ou encore à être reproduites pour effectuer des calculs d'incertitude. A cet effet, il est possible d'utiliser les références fournies dans la bibliographie ou dans d'autres documents de fiabilité reconnue. Les spécifications des instruments de mesure sont données dans la série CISPR 16-1 et les méthodes de mesure sont couvertes par la série CISPR 16-2. Des informations complémentaires et références contextuelles sur les perturbations CISPR et radioélectriques sont données dans la CISPR 16-3. Les autres parties de la série CISPR 16-4 contiennent des informations complémentaires sur l'incertitude en général, les statistiques et la modélisation des limites.

Specifikacija za merilne naprave in metode za merjenje radijskih motenj in odpornosti - 4-2. del: Modeliranje negotovosti, statistike in mejnih vrednosti - Negotovost merilnih instrumentov (CISPR 16-4-2:2011)

Ta del CISPR 16-4 določa metodo za uporabo negotovosti merilnih instrumentov (MIU) pri določanju skladnosti z mejami motenj po CISPR. Gradivo je pomembno tudi za vse preskuse EMC, pri katerih na razlago rezultatov in zaključke vpliva negotovost merilnih instrumentov, uporabljenih med preskušanjem.
OPOMBA: V skladu z Vodilom IEC 107 je CISPR 16-4-2 osnovni standard EMC, ki ga uporabljajo odbori za proizvode IEC. Kot je navedeno v Vodilu 107, so odbori za proizvode odgovorni za določevanje uporabe tega standarda EMC. CISPR in njegovi pododbori so pripravljeni sodelovati s tehničnimi odbori in odbori za proizvode pri ocenjevanju uporabnosti tega standarda za določene proizvode. Dodatki vsebujejo temeljno gradivo, ki se uporablja pri podajanju velikosti MIU, ugotovljene pri nastajanju vrednosti CISPR, prikazanih v točkah od 4 do 8, in so zato koristno temeljno gradivo za tiste, ki potrebujejo začetne in nadaljnje informacije o MIU in informacije o tem, kako v verigi meritev upoštevati posamezne negotovosti. Dodatki niso mišljeni kot priročniki za vajo ali uporabo ali za kopiranje pri izračunavanju negotovosti. V ta namen se lahko uporabljajo reference, navedene v bibliografiji, ali drugi splošno priznani dokumenti.
Specifikacije merilnih instrumentov so podane v seriji CISPR 16-1, merilne metode pa zajema serija CISPR 16-2. Nadaljnje informacije in ozadje o CISPR in radijskih motnjah so navedeni v CISPR 16-3. Drugi deli serije CISPR 16-4 vsebujejo več informacij o negotovosti na splošno, statistiki in modeliranju mejnih vrednosti. Za več informacij o ozadju in o vsebini serije CISPR 16-4 glejte uvod tega dela.

General Information

Status
Published
Publication Date
13-Nov-2011
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
03-Nov-2011
Due Date
08-Jan-2012
Completion Date
14-Nov-2011

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Specifikacija za merilne naprave in metode za merjenje radijskih motenj in odpornosti - 4-2. del: Modeliranje negotovosti, statistike in mejnih vrednosti - Negotovost merilnih instrumentov (CISPR 16-4-2:2011)Anforderungen an Geräte und Einrichtungen sowie Festlegung der Verfahren zur Messung der hochfrequenten Störaussendung (Funkstörungen) und Störfestigkeit - Teil 4-2: Unsicherheiten, Statistik und Modelle zur Ableitung von Grenzwerten (Störmodell) - Messgeräte-Unsicherheit (CISPR 16-4-2:2011)Spécifications des méthodes et des appareils de mesure des perturbations radioélectriques et de l'immunité aux perturbations radioélectriques - Partie 4-2: Incertitudes, statistiques et modélisation des limites - Incertitudes de mesure de l'instrumentationSpecification for radio disturbance and immunity measuring apparatus and methods - Part 4-2: Uncertainties, statistics and limit modelling - Measurement instrumentation uncertainty33.100.01Elektromagnetna združljivost na splošnoElectromagnetic compatibility in general17.220.20Measurement of electrical and magnetic quantitiesICS:Ta slovenski standard je istoveten z:EN 55016-4-2:2011SIST EN 55016-4-2:2011en01-december-2011SIST EN 55016-4-2:2011SLOVENSKI
STANDARDSIST EN 55016-4-2:20051DGRPHãþD



SIST EN 55016-4-2:2011



EUROPEAN STANDARD EN 55016-4-2 NORME EUROPÉENNE
EUROPÄISCHE NORM October 2011
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 55016-4-2:2011 E
ICS 33.100.10; 33.100.20 Supersedes EN 55016-4-2:2004
English version
Specification for radio disturbance and immunity measuring apparatus and methods -
Part 4-2: Uncertainties, statistics and limit modelling -
Measurement instrumentation uncertainty (CISPR 16-4-2:2011)
Spécifications des méthodes et des appareils de mesure des perturbations radioélectriques et de l'immunité aux perturbations radioélectriques -
Partie 4-2: Incertitudes, statistiques
et modélisation des limites -
Incertitudes de mesure de l'instrumentation (CISPR 16-4-2:2011)
Anforderungen an Geräte und Einrichtungen sowie Festlegung der Verfahren zur Messung der hochfrequenten Störaussendung (Funkstörungen) und Störfestigkeit -
Teil 4-2: Unsicherheiten, Statistik
und Modelle zur Ableitung von Grenzwerten (Störmodell) -
Messgeräte-Unsicherheit (CISPR 16-4-2:2011)
This European Standard was approved by CENELEC on 2011-07-13. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, 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.
SIST EN 55016-4-2:2011



EN 55016-4-2:2011 - 2 -
Foreword The text of document CISPR/A/942/FDIS, future edition 2 of CISPR 16-4-2, prepared by CISPR SC A, "Radio-interference measurements and statistical methods", was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 55016-4-2 on 2011-07-13. This European Standard supersedes EN 55016-4-2:2004. EN 55016-4-2:2011 includes the following significant technical additions with respect to EN 55016-4-2:2004: – Methods of conducted disturbance measurements  on the mains port using a voltage probe,  on the telecommunication port using an AAN (ISN),  on the telecommunication port using a CVP, and  on the telecommunication port using a current probe. – Methods of radiated disturbance measurements  in the frequency range 30 MHz to 1 000 MHz using a FAR, and  in the frequency range 1 GHz to 18 GHz using a FAR. 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)
2012-04-13 – latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow)
2014-07-13 Annex ZA has been added by CENELEC. __________ Endorsement notice The text of the International Standard CISPR 16-4-2:2011 was approved by CENELEC as a European Standard without any modification. __________
SIST EN 55016-4-2:2011



- 3 - EN 55016-4-2:2011 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
CISPR 11
- Industrial, scientific and medical equipment - Radio-frequency disturbance characteristics - Limits and methods of measurement EN 55011 -
CISPR 12 - Vehicles, boats and internal combustion engines - Radio disturbance characteristics - Limits and methods of measurement for the protection of off-board receivers EN 55012 -
CISPR 13 - Sound and television broadcast receivers and associated equipment - Radio disturbance characteristics - Limits and methods of measurement EN 55013 -
CISPR 16-1-1 - Specification for radio disturbance and immunity measuring apparatus and methods -Part 1-1: Radio disturbance and immunity measuring apparatus - Measuring apparatus EN 55016-1-1 -
CISPR 16-1-2 - Specification for radio disturbance and immunity measuring apparatus and methods -Part 1-2: Radio disturbance and immunity measuring apparatus - Ancillary equipment - Conducted disturbances EN 55016-1-2 -
CISPR 16-1-3 - Specification for radio disturbance and immunity measuring apparatus and methods -Part 1-3: Radio disturbance and immunity measuring apparatus - Ancillary equipment - Disturbance power EN 55016-1-3 -
CISPR 16-1-4 - Specification for radio disturbance and immunity measuring apparatus and methods -Part 1-4: Radio disturbance and immunity measuring apparatus - Antennas and test sites for radiated disturbance measurements EN 55016-1-4 -
CISPR 16-2-1 - Specification for radio disturbance and immunity measuring apparatus and methods -Part 2-1: Methods of measurement of disturbances and immunity - Conducted disturbance measurements EN 55016-2-1 -
CISPR 16-2-2 - Specification for radio disturbance and immunity measuring apparatus and methods -Part 2-2: Methods of measurement of disturbances and immunity - Measurement of disturbance power EN 55016-2-2 -
SIST EN 55016-4-2:2011



EN 55016-4-2:2011 - 4 -
Publication Year Title EN/HD Year CISPR 16-2-3 2010 Specification for radio disturbance and immunity measuring apparatus and methods -Part 2-3: Methods of measurement of disturbances and immunity - Radiated disturbance measurements EN 55016-2-3 2010
CISPR 16-3 - Specification for radio disturbance and immunity measuring apparatus and methods -Part 3: CISPR technical reports - -
CISPR 16-4-1 - Specification for radio disturbance and immunity measuring apparatus and methods -Part 4-1: Uncertainties, statistics and limit modelling - Uncertainties in standardized EMC tests - -
CISPR 16-4-3 - Specification for radio disturbance and immunity measuring apparatus and methods -Part 4-3: Uncertainties, statistics and limit modeling - Statistical considerations in the determination of EMC compliance of mass-produced products - -
CISPR 22 (mod) 2008 Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement EN 55022 2010
ISO/IEC Guide 98-3 - Uncertainty of measurement -
Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) - -
ISO/IEC Guide 99 - International vocabulary of metrology - Basic and general concepts and associated terms (VIM) - -
SIST EN 55016-4-2:2011



CISPR 16-4-2 Edition 2.0 2011-06 INTERNATIONAL STANDARD NORME INTERNATIONALE Specification for radio disturbance and immunity measuring apparatus and methods –
Part 4-2: Uncertainties, statistics and limit modelling – Measurement instrumentation uncertainty
Spécifications des méthodes et des appareils de mesure des perturbations radioélectriques et de l'immunité aux perturbations radioélectriques –
Partie 4-2: Incertitudes, statistiques et modélisation des limites – Incertitudes de mesure de l’instrumentation
INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XA ICS 33.100.10; 33.100.20 PRICE CODE CODE PRIX ISBN 978-2-88912-525-8
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
BASIC EMC PUBLICATION PUBLICATION FONDAMENTALE EN CEM
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale ®
SIST EN 55016-4-2:2011 colourinside



– 2 – CISPR 16-4-2  IEC:2011 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope . 7 2 Normative references . 7 3 Terms, definitions, symbols and abbreviations . 8 3.1 Terms and definitions . 8 3.2 Symbols . 9 3.3 Abbreviations . 10 4 Compliance criterion for the MIU . 10 4.1 General . 10 4.2 Compliance assessment . 11 5 Conducted disturbance measurements . 12 5.1 Conducted disturbance measurements at a mains port using an AMN
(see also B.1) . 12 5.2 Conducted disturbance measurements at a mains port using a VP
(see also B.2) . 12 5.3 Conducted disturbance measurements at a telecommunication port using an AAN (Y-network) (see also B.3) . 13 5.4 Conducted disturbance measurements at a telecommunication port using a CVP (see also B.4) . 14 5.5 Conducted disturbance measurements at a telecommunication port using a CP (see also B.5) . 15 6 Disturbance power measurements (see also C.1) . 15 6.1 Measurand for disturbance power measurements . 15 6.2 Symbols of input quantities specific for disturbance power measurements . 15 6.3 Input quantities to be considered for disturbance power measurements . 16 7 Radiated disturbance measurements in the frequency range 30 MHz to
1 000 MHz . 16 7.1 Radiated disturbance measurements at an OATS or in a SAC (see also D.1) . 16 7.2 Radiated disturbance measurements in a FAR (see also D.2) . 17 8 Radiated disturbance measurements in the frequency range 1 GHz to 18 GHz (see also E.1) . 18 8.1 Measurand for radiated disturbance measurements in a FAR (FSOATS) . 18 8.2 Symbols of input quantities specific for radiated disturbance measurements . 18 8.3 Input quantities to be considered for radiated disturbance measurements in a FAR . 18 Annex A (informative)
Basis for Ucispr values in Table 1, general information and
rationale for input quantities common to all measurement methods . 20 Annex B (informative)
Basis for Ucispr values in Table 1, uncertainty budgets and rationale for conducted disturbance measurements . 28 Annex C (informative)
Basis for Ucispr values in Table 1 – Disturbance power measurements . 37 Annex D (informative)
Basis for Ucispr values in Table 1 – Radiated disturbance measurements from 30 MHz to 1 000 MHz . 39 Annex E (informative)
Basis for Ucispr values in Table 1 – Radiated disturbance measurements from 1 GHz to 18 GHz . 52 Bibliography . 56 SIST EN 55016-4-2:2011



CISPR 16-4-2  IEC:2011 – 3 –
Figure A.1 – Deviation of the QP detector level indication from the signal level at receiver input for two cases, a sine-wave signal and an impulsive signal (PRF 100 Hz) . 23 Figure A.2 – Deviation of the peak detector level indication from the signal level at receiver input for two cases, a sine-wave signal and an impulsive signal (PRF 100 Hz) . 24 Figure A.3 – Illustration of system noise figure . 25 Figure D.1 – Effect of antenna directivity without tilting . 47 Figure D.2 – Effect of antenna directivity with optimum tilting . 47
Table 1 – Values of Ucispr . 11 Table B.1 – Conducted disturbance measurements from 9 kHz to 150 kHz
using a 50 Ω/50 µH + 5 Ω AMN . 28 Table B.2 – Conducted disturbance measurements from
150 kHz to 30 MHz using a 50 Ω/50 µH AMN . 29 Table B.3 – Conducted disturbance measurements
from 9 kHz to 30 MHz using a VP . 30 Table B.4 – Conducted disturbance measurements
from 150 kHz to 30 MHz using an AAN . 31 Table B.5 – Conducted disturbance measurements from 150 kHz to 30 MHz
using a capacitive voltage probe (CVP) . 32 Table B.6 – Conducted disturbance measurements
from 9 kHz to 30 MHz using a CP . 33 Table C.1 – Disturbance power from 30 MHz to 300 MHz . 37 Table D.1 – Horizontally polarized radiated disturbances from 30 MHz to 200 MHz using a biconical antenna at a distance of 3 m, 10 m, or 30 m. 40 Table D.2 – Vertically polarized radiated disturbances from 30 MHz to 200 MHz using a biconical antenna at a distance of 3 m, 10 m, or 30 m . 41 Table D.3 – Horizontally polarized radiated disturbances from 200 MHz to 1 GHz using an LPDA antenna at a distance of 3 m, 10 m, or 30 m . 42 Table D.4 – Vertically polarized radiated disturbances from 200 MHz to 1 GHz using an LPDA antenna at a distance of 3 m, 10 m, or 30 m . 43 Table D.5 – Radiated disturbance measurements from 30 MHz to 200 MHz using a biconical antenna in a FAR at a distance of 3 m . 44 Table D.6 – Radiated disturbance measurements from 200 MHz to 1 000 MHz using an LPDA antenna in a FAR at a distance of 3 m . 45 Table E.1 – Radiated disturbance measurements from 1 GHz to 6 GHz in a FAR (FSOATS) at a distance of 3 m . 52 Table E.2 – Radiated disturbance measurements from 6 GHz to 18 GHz in a FAR (FSOATS) at a distance of 3 m . 53 SIST EN 55016-4-2:2011



– 4 – CISPR 16-4-2  IEC:2011 INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
SPECIFICATION FOR RADIO DISTURBANCE AND IMMUNITY
MEASURING APPARATUS AND METHODS –
Part 4-2: Uncertainties, statistics and limit modelling –
Measurement instrumentation uncertainty
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 CISPR 16-4-2 has been prepared by CISPR subcommittee A: Radio-interference measurements and statistical methods. This second edition cancels and replaces the first edition published in 2003. It constitutes a technical revision. This edition includes the following significant technical additions with respect to the previous edition: – Methods of conducted disturbance measurements • on the mains port using a voltage probe, • on the telecommunication port using an AAN (ISN), SIST EN 55016-4-2:2011



CISPR 16-4-2  IEC:2011 – 5 – • on the telecommunication port using a CVP, and • on the telecommunication port using a current probe. – Methods of radiated disturbance measurements • in the frequency range 30 MHz to 1 000 MHz using a FAR, and • in the frequency range 1 GHz to 18 GHz using a FAR. This publication has the status of a basic EMC standard in accordance with IEC Guide 107:2009, Electromagnetic compatibility – Guide to the drafting of electromagnetic compatibility publications. The text of this standard is based on the following documents: FDIS Report on voting CISPR/A/942/FDIS CISPR/A/952/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. A list of all parts of the CISPR 16 series can be found, under the general title Specification for radio disturbance and immunity measuring apparatus and methods, on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability 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.
IMPORTANT – The “colour inside” logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this publication using a colour printer.
SIST EN 55016-4-2:2011



– 6 – CISPR 16-4-2  IEC:2011 INTRODUCTION The CISPR 16-4 series, Specification for radio disturbance and immunity measuring apparatus and methods – Uncertainties, statistics and limit modelling, contains information related to uncertainties, statistics and limit modelling, and consists of the following five parts: • Part 4-1: Uncertainties in standardized EMC tests, • Part 4-2: Measurement instrumentation uncertainty, • Part 4-3: Statistical considerations in the determination of EMC compliance of mass-produced products, • Part 4-4: Statistics of complaints and a model for the calculation of limits for the protection of radio services, and • Part 4-5: Conditions for the use of alternative test methods. For practical reasons, standardized electromagnetic compatibility (EMC) tests are simplified representations of possible electromagnetic interference (EMI) scenarios that a product may encounter in practice. Consequently, in an EMC standard, the measurand, the limit, measurement instruments, measurement set-up, measurement procedure and measurement conditions are simplified but are still meaningful (representative). Here meaningful means that there is a statistical correlation between compliance of the product with a limit, based on a standardized EMC test using standardized test equipment, and a high probability of actual EMC of the same product during its life cycle. Part 4-4 provides methods based on statistics to derive meaningful disturbance limits to protect radio services. In general, a standardized EMC test should be developed such that reproducible results are obtained if different parties perform the same test with the same EUT. However, various uncertainty sources limit the reproducibility of a standardized EMC.
Part 4-1 is a technical report that consists of a collection of informative reports that address all relevant uncertainty sources that may be encountered during EMC compliance tests. Typical examples of uncertainty sources are the EUT itself, the measurement instrumentation, the set-up of the EUT, the test procedures and the environmental conditions. Part 4-2 describes a specific category of uncertainties, i.e. measurement instrumentation uncertainties. In this part, examples of MIU budgets are given for most of the CISPR measurement methods. Also in this part, normative requirements are given on how to apply the MIU when determining compliance of an EUT with a disturbance limit (i.e. conformity assessment decision). Part 4-3 is a technical report that describes the statistical treatment of test results when compliance tests are performed on samples of mass-produced products. This treatment is known as the 80 %/80 % rule. Part 4-4 is a technical report that contains CISPR recommendations for the collation of statistical data on interference complaints and for the classification of interference sources. Also, models for the calculation of limits for various modes of interference coupling are given. Part 4-5 is a technical report describing a method to enable product committees to develop limits for alternative test methods, using conversions from established limits. SIST EN 55016-4-2:2011



CISPR 16-4-2  IEC:2011 – 7 – SPECIFICATION FOR RADIO DISTURBANCE AND IMMUNITY
MEASURING APPARATUS AND METHODS –
Part 4-2: Uncertainties, statistics and limit modelling –
Measurement instrumentation uncertainty
1 Scope This part of CISPR 16-4 specifies the method of applying Measurement Instrumentation Uncertainty (MIU) when determining compliance with CISPR disturbance limits. The material is also relevant to any EMC test when interpretation of the results and conclusions reached will be impacted by the uncertainty of the measurement instrumentation used during testing.
NOTE In accordance with IEC Guide 107, CISPR 16-4-2 is a basic EMC standard for use by product committees of the IEC. As stated in Guide 107, product committees are responsible for determining the applicability of the EMC standard. CISPR and its sub-committees are prepared to co-operate with technical committees and product committees in the evaluation of the applicability of this standard for specific products. The annexes contain the background material used in providing the amount of MIU found in generating the CISPR values shown in Clauses 4 through 8 and hence provide valuable background material for those needing both initial and further information on MIU and how to take individual uncertainties in the measurement chain into account. The annexes, however, are not intended to be a tutorial or user manual or to be copied when making uncertainty calculations. For that purpose, the references shown in the bibliography, or other widely recognized documents, may be used. Measurement instrumentation specifications are given in the CISPR 16-1 series, while the methods of measurement are covered in the CISPR 16-2 series. Further information and background on CISPR and radio disturbances is given in CISPR 16-3. The other parts of the CISPR 16-4 series contain further information on uncertainties in general, statistics and limit modelling. See the introduction of this part for more information on the background and on the content of the CISPR 16-4 series. 2 Normative references 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. CISPR 11, Industrial, scientific and medical equipment – Radio-frequency disturbance characteristics – Limits and methods of measurement CISPR 12, Vehicles, boats and internal combustion engines – Radio disturba
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