PD CISPR/TR 16-4-1:2009

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, and abbreviations
4 Basic considerations on uncertainties in emission
   measurements
5 Basic considerations on uncertainties in immunity
   testing
6 Voltage measurements
7 Absorbing clamp measurements
8 Radiated emission measurements using a SAC
   or an OATS in the frequency range of 30 MHz to 1000 MHz
9 Conducted immunity measurements
10 Radiated immunity measurements
Annex A (informative) - Compliance uncertainty and
        interference probability
Annex B (informative) - Numerical example of the
        consequences of Faraday's law
Annex C (informative) - Possible amendments to
        CISPR publications with regards to voltage
        measurements
Annex D (informative) - Analysis method of results of an
        interlaboratory test
Annex E (informative) - Uncertainty budgets for the clamp
        calibration methods
Annex F (informative) - Uncertainty budget for the clamp
        measurement method
Annex G (informative) - Uncertainty estimates for the radiated
        emission measurement methods
Annex H (informative) - Results of various round robin
        tests for SAC/OATS-based radiated emission
        measurements
Annex I (informative) - Additional information about
        distinctions between the terms measurement
        uncertainty and standards compliance uncertainty
Bibliography

Provides guidance on the treatment of uncertainties to those who are involved in the development or modification of CISPR electromagnetic compatibility (EMC) standards.

This part of CISPR16-4 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: 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” (SCU, see3.1.16); give guidance on the estimation of the magnitude of the standards compliance uncertainty; 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.