CISPR TR 16-4-1:2009

Specification for radio disturbance and immunity measuring apparatus and methods - Part 4-1: Uncertainties, statistics and limit modelling - Uncertainties in standardized EMC tests

CISPR/TR 16-4-1:2009 gives guidance on the treatment of uncertainties to those who are involved in the development or modification of CISPR electromagnetic compatibility (EMC) standards. In addition, this part provides useful background information for those who apply the standards and the uncertainty aspects in practice. The objectives of this part are to:
a) identify the parameters or sources governing the uncertainty associated with the statement that a given product complies with the requirement specified in a CISPR recommendation. This uncertainty will be called "standards compliance uncertainty";
b) give guidance on the estimation of the magnitude of the standards compliance uncertainty;
c) give guidance for the implementation of the standards compliance uncertainty into the compliance criterion of a CISPR standardised compliance test.
As such, this part can be considered as a handbook that can be used by standards writers to incorporate and harmonise uncertainty considerations in existing and future CISPR standards. This part also gives guidance to regulatory authorities, accreditation bodies and test engineers to judge the performance quality of an EMC test-laboratory carrying out CISPR standardised compliance tests. The uncertainty considerations given in this part can also be used as guidance when comparing test results (and their uncertainties) obtained by using different alternative test methods. The uncertainty of a compliance test also relates to the probability of occurrence of an electromagnetic interference (EMI) problem in practice. This aspect is recognized and introduced briefly in this part. However, the problem of relating uncertainties of a compliance test to the occurrence of EMI in practice is not considered within the scope of this part. The scope of this part is limited to all the relevant uncertainty considerations of a standardized EMC compliance test. This second edition of CISPR 16-4-1 cancels and replaces the first edition published in 2003, and its Amendments 1 (2004) and 2 (2007). It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition. The provisions available for application of uncertainties in the determination of the compliance criterion are explained more generally and a procedure is added for re-testing an approved EUT by another test house.

General Information

• Status: Published
• Publication Date: 22-Feb-2009
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.100.10 - Emission
• ICS: 33.100.20 - Immunity
• Technical Committee: CIS/A - Radio-interference measurements and statistical methods
• Current Stage: PPUB - Publication issued
• Start Date: 31-May-2009
• Completion Date: 23-Feb-2009

Standards Content (Sample)

CISPR/TR 16-4-1
Edition 2.0 2009-02
TECHNICAL
REPORT

INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
Specification for radio disturbance and immunity measuring apparatus and
methods –
Part 4-1: Uncertainties, statistics and limit modelling – Uncertainties in
standardized EMC tests


CISPR/TR 16-4-1:2009(E)

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CISPR/TR 16-4-1
Edition 2.0 2009-02
TECHNICAL
REPORT

INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
Specification for radio disturbance and immunity measuring apparatus and
methods –
Part 4-1: Uncertainties, statistics and limit modelling – Uncertainties in
standardized EMC tests

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XE
ICS 33.100.10; 33.100.20 ISBN 978-2-88910-014-9
® Registered trademark of the International Electrotechnical Commission

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– 2 – TR CISPR 16-4-1 © IEC:2009(E)
CONTENTS
FOREWORD.7
INTRODUCTION.9
1 Scope.10
2 Normative references .10
3 Terms, definitions, and abbreviations .11
3.1 Terms and definitions .12
3.2 Abbreviations .15
4 Basic considerations on uncertainties in emission measurements.15
4.1 Introductory remarks .15
4.2 Types of uncertainties in emission measurements .17
4.2.1 General .17
4.2.2 Purpose of uncertainty considerations .18
4.2.3 Categories of uncertainty sources.19
4.2.4 Summary of types of uncertainties .22
4.2.5 Influence quantities .
...