CISPR 16-4-5-2006 Specification for radio disturbance and immunity measuring apparatus and methods – Part 4-5 Uncertainties statistics and limit modelling – Conditions for the useS.pdf

1、 TECHNICAL REPORT CISPR16-4-5First edition2006-10Specification for radio disturbance and immunity measuring apparatus and methods Part 4-5: Uncertainties, statistics and limit modelling Conditions for the use of alternative test methods Reference number CISPR 16-4-5/TR:2006(E) INTERNATIONAL SPECIAL

2、COMMITTEE ON RADIO INTERFERENCE Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1. Consolidated editions The IEC is now publishing consolidated versions of its publications. For

3、 example, edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the base publication incorporating amendment 1 and the base publication incorporating amendments 1 and 2. Further information on IEC publications The technical content of IEC publications is kept under constant

4、review by the IEC, thus ensuring that the content reflects current technology. Information relating to this publication, including its validity, is available in the IEC Catalogue of publications (see below) in addition to new editions, amendments and corrigenda. Information on the subjects under con

5、sideration and work in progress undertaken by the technical committee which has prepared this publication, as well as the list of publications issued, is also available from the following: IEC Web Site (www.iec.ch) Catalogue of IEC publications The on-line catalogue on the IEC web site (www.iec.ch/s

6、earchpub) enables you to search by a variety of criteria including text searches, technical committees and date of publication. On-line information is also available on recently issued publications, withdrawn and replaced publications, as well as corrigenda. IEC Just Published This summary of recent

7、ly issued publications (www.iec.ch/online_news/ justpub) is also available by email. Please contact the Customer Service Centre (see below) for further information. Customer Service Centre If you have any questions regarding this publication or need further assistance, please contact the Customer Se

8、rvice Centre: Email: custserviec.ch Tel: +41 22 919 02 11 Fax: +41 22 919 03 00 TECHNICAL REPORT CISPR16-4-5First edition2006-10Specification for radio disturbance and immunity measuring apparatus and methods Part 4-5: Uncertainties, statistics and limit modelling Conditions for the use of alternati

9、ve test methods For price, see current catalogue IEC 2006 Copyright - all rights reserved No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Internati

10、onal Electrotechnical Commission, 3, rue de Varemb, PO Box 131, CH-1211 Geneva 20, SwitzerlandTelephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.ch XCommission Electrotechnique InternationaleInternational Electrotechnical Commission PRICE CODE INTERNATIONAL SPECI

11、AL COMMITTEE ON RADIO INTERFERENCE 2 TR CISPR 16-4-5 IEC:2006(E) CONTENTS FOREWORD.4 1 Scope.6 2 Normative references .6 3 Terms and definitions .6 4 Symbols and abbreviated terms7 5 Introduction 8 6 Procedure to derive limits for an alternative test method.9 6.1 Overview .9 6.2 Select the reference

12、 quantity X12 6.3 Describe the test methods and measurands 12 6.4 Determine the deviations of the measured quantities from the reference quantity .13 6.5 Determine the average values of the deviations 13 6.6 Estimate the standard uncertainties of the test methods14 6.7 Estimate the expanded uncertai

13、nties of the test methods 15 6.8 Calculate the average conversion factor16 6.9 Verify the calculated values.17 6.10 Apply the conversion .17 Annex A (informative) Remarks on EUT modelling .18 Annex B (informative) Examples of application of the test method comparison procedure .19 Bibliography49 Fig

14、ure 1 Overview of quantities to estimate for use in conversion procedure10 Figure 2 Overview of limit conversion procedure using estimated quantities.11 Figure B.1 Example reference quantity 19 Figure B.2 EUT and antenna set-up for fully anechoic room emission measurement 20 Figure B.3 EUT and anten

15、na set-up for open-area test site measurement20 Figure B.4 Radiation characteristics of elementary radiator (left), and scheme of EUT-model (right) .21 Figure B.5 Maximum average deviations for 3 m FAR (top) and 10 m OATS (bottom) 24 Figure B.6 Sample cumulative distribution function 26 Figure B.7 U

16、ncertainties due to the unknown EUT characteristic for 3 m FAR (top) and 10 m OATS (bottom) 28 Figure B.8 Expanded uncertainties (k = 2) of alternative (3 m FAR, top) and established (10 m OATS, bottom) test methods 32 Figure B.9 Maximum average conversion factors for different volumes 33 Figure B.1

17、0 Photo (left) and cut-view of simulation model (right) of the specimen EUT 35 Figure B.11 Deviations of the specimen EUT: 3 m fully anechoic room (top) and 10 m open area test site (bottom)36 Figure B.12 Sample FAR measurement .37 Figure B.13 OATS 10 m limit line converted to FAR 3 m conditions37 T

18、R CISPR 16-4-5 IEC:2006(E) 3 Figure B.14 Expanded uncertainties.37 Figure B.15 Comparison of the measured values with the corrected converted limit.38 Figure B.16 EUT and antenna set-up of 3 m open area test site measurement.39 Figure B.17 Maximum average deviations for 3 m OATS40 Figure B.18 Uncert

19、ainties due to the unknown EUT characteristic for 3 m OATS41 Figure B.19 Expanded uncertainties (k = 2) of alternative test method OATS (3 m)43 Figure B.20 Maximum average conversion factors .44 Figure B.21 Deviations of the specimen EUT: Open area test site (3 m).46 Figure B.22 Sample OATS (3 m) me

20、asurement47 Figure B.23 OATS (10 m) limit line converted to OATS (3 m) conditions 47 Figure B.24 Expanded uncertainties.48 Figure B.25 Comparison of the corrected values with the converted limit .48 Table 1 Summary of steps in conversion procedure .9 Table 2 Overview of quantities and defining equat

21、ions for conversion process.12 Table B.1 Instrumentation uncertainty of the 3 m fully anechoic chamber test method .25 Table B.2 Uncertainties in dB due to the unknown EUT characteristic for 3 m FAR 30 Table B.3 Uncertainties in dB due to the unknown EUT characteristic for 10 m OATS31 Table B.4 Maxi

22、mum average conversion factors in dB between 10 m OATS and 3 m FAR .34 Table B.5 Uncertainties in dB due to the unknown EUT characteristic for 3 m OATS42 Table B.6 Maximum average conversion factors in dB between 10 m and 3 m OATS.45 4 TR CISPR 16-4-5 IEC:2006(E) INTERNATIONAL ELECTROTECHNICAL COMMI

23、SSION _ SPECIFICATION FOR RADIO DISTURBANCE AND IMMUNITY MEASURING APPARATUS AND METHODS Part 4-5: Uncertainties, statistics and limit modelling Conditions for the use of alternative test methods FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standard

24、ization 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 Intern

25、ational 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

26、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 th

27、e 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 hav

28、e 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 misi

29、nterpretation 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 natio

30、nal or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition

31、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

32、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

33、 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. The main task of IEC technical committees

34、 is to prepare International Standards. However, a technical committee may propose the publication of a technical report when it has collected data of a different kind from that which is normally published as an International Standard, for example “state of the art“. CISPR 16-4-5, which is a technic

35、al report, has been prepared by CISPR subcommittee A: Radio-interference measurements and statistical methods. The text of this technical report is based on the following documents: Enquiry draft Report on voting CISPR/A/665/DTR CISPR/A/685/RVC Full information on the voting for the approval of this

36、 technical report can be found in the report on voting indicated in the above table. TR CISPR 16-4-5 IEC:2006(E) 5 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the CISPR 16-4 series, published under the general title Specification for ra

37、dio disturbance and immunity measuring apparatus and methods Part 4: Uncertainties, statistics and limit modelling, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site u

38、nder “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. A bilingual version of this publication may be issued at a later date. 6 TR CISPR 16-4-5 IEC:2006(E) SPECIFICATION FO

39、R RADIO DISTURBANCE AND IMMUNITY MEASURING APPARATUS AND METHODS Part 4-5: Uncertainties, statistics and limit modelling Conditions for the use of alternative test methods 1 Scope This part of CISPR 16-4 specifies a method to enable product committees to develop limits for alternative test methods,

40、using conversions from established limits. This method is generally applicable for all kinds of disturbance measurements, but focuses on radiated disturbance measurements (i.e. field strength), for which several alternative methods are presently specified. These limits development methods are intend

41、ed for use by product committees and other groups responsible for defining emissions limits in situations where it is decided to use alternative test methods and the associated limits in product standards. 2 Normative references IEC 60050-161, International Electrotechnical Vocabulary (IEV) Chapter

42、161: Electromagnetic compatibility CISPR 16-4-1:2003, Specification for radio disturbance and immunity measuring apparatus and methods Part 4-1: Uncertainties, statistics and limit modelling Uncertainty in standardized EMC tests CISPR 16-4-2:2003, Specification for radio disturbance and immunity mea

43、suring apparatus and methods Part 4-2: Uncertainties, statistics and limit modelling Uncertainty in EMC measurements 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60050-161 and the following apply. 3.1 established test method test method described

44、in a basic standard with established emissions limits defined in corresponding product or generic standards. An established test method consists of a specific test procedure, a specific test set-up, a specific test facility or site, and an established emissions limit NOTE The following test methods

45、have been considered to be established test methods in CISPR: conducted disturbance measurements: test method defined in CISPR 16-2-1:2003, Clause 7; radiated disturbance measurements up to 1 GHz: the test method defined in CISPR 16-2-3, 7.2.1; radiated disturbance measurements up to 18 GHz: the tes

46、t method defined in CISPR 16-2-3, 7.3. 3.2 alternative test method test method described in a basic standard without established emissions limits. The alternative test method is designed for the same purpose as the established test method. An alternative test method consists of a specific test proce

47、dure, a specific test set-up, a specific test facility or site, and a derived emissions limit that was determined by the application of the proposed method stated in this document TR CISPR 16-4-5 IEC:2006(E) 7 3.3 established limit limit having “many years” of good protection of radio services. NOTE

48、 An example is radiated field strength measured on OATS, developed to protect radio services as described in CISPR 16-3. 3.4 derived limit limit applicable for the alternative test method, derived by appropriate conversion from the established limit and expressed in terms of the misbrands 3.5 conver

49、sion factor K for a given EUT or type of EUT, the relation of the measured value of the established test method to the measured value of the alternative test method NOTE The terms measured and calculated are used interchangeably at various places in this document to describe actual laboratory tests and computer simulations. 3.6 reference quantity X the basic parameter which determi