SANS 222-2009 Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement《信息技术设备 无线电干扰特性 限值及测量方法》.pdf

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1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-22560-5 SANS 222:2009 Edition 6 CISPR 22:2008 Edition 6SOUTH AFRICAN NATIONAL STANDARD Information technology equipment Radio disturbance

4、characteristics Limits and methods of measurement This national standard is the identical implementation of CISPR 22:2008 and is adopted with the permission of the International Electrotechnical Commission (International Special Committee on Radio Interference). Published by SABS Standards Division

5、1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 222:2009 Edition 6 CISPR 22:2008 Edition 6 Table of changes Change No

6、. Date Scope National foreword This South African standard was approved by National Committee SABS TC 73, Electromagnetic compatibility, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in April 2009.

7、This SANS document supersedes SANS 222:2006 (edition 5.2). This standard may only be used and printed by approved subscription and freemailing clients of the SABS. CISPR 22 Edition 6.0 2008-09 INTERNATIONAL STANDARD NORME INTERNATIONALE Information technology equipment Radio disturbance characterist

8、ics Limits and methods of measurement Appareils de traitement de linformation Caractristiques des perturbations radiolectriques Limites et mthodes de mesure INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XC ICS 33.100.10 PRICE CODE CODE PRIX ISBN 2-8318-9960-5 I

9、NTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE COMIT INTERNATIONAL SPCIAL DES PERTURBATIONS RADIOLECTRIQUES Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale SANS 222:2009This standard may only be used and printe

10、d by approved subscription and freemailing clients of the SABS. 2 CISPR 22 IEC:2008 CONTENTS FOREWORD.5 INTRODUCTION.7 1 Scope and object8 2 Normative references8 3 Definitions 9 4 Classification of ITE10 4.1 Class B ITE .11 4.2 Class A ITE .11 5 Limits for conducted disturbance at mains terminals a

11、nd telecommunication ports11 5.1 Limits of mains terminal disturbance voltage 11 5.2 Limits of conducted common mode (asymmetric mode) disturbance at telecommunication ports 12 6 Limits for radiated disturbance 13 6.1 Limits below 1 GHz13 6.2 Limits above 1 GHz .13 7 Interpretation of CISPR radio di

12、sturbance limit 14 7.1 Significance of a CISPR limit .14 7.2 Application of limits in tests for conformity of equipment in series production14 8 General measurement conditions15 8.1 Ambient noise15 8.2 General arrangement.15 8.3 EUT arrangement 18 8.4 Operation of the EUT.20 9 Method of measurement

13、of conducted disturbance at mains terminals and telecommunication ports .21 9.1 Measurement detectors .21 9.2 Measuring receivers 21 9.3 Artificial mains network (AMN) .21 9.4 Ground reference plane .22 9.5 EUT arrangement 22 9.6 Measurement of disturbances at telecommunication ports24 9.7 Recording

14、 of measurements 28 10 Method of measurement of radiated disturbance .28 10.1 Measurement detectors .28 10.2 Measuring receiver below 1 GHz28 10.3 Antenna below 1 GHz 28 10.4 Measurement site below 1 GHz29 10.5 EUT arrangement below 1 GHz30 10.6 Radiated emission measurements above 1 GHz.30 10.7 Rec

15、ording of measurements 30 10.8 Measurement in the presence of high ambient signals31 10.9 User installation testing31 11 Measurement uncertainty31 Annex A (normative) Site attenuation measurements of alternative test sites 42 Annex B (normative) Decision tree for peak detector measurements.48 SANS 2

16、22:2009This standard may only be used and printed by approved subscription and freemailing clients of the SABS.CISPR 22 IEC:2008 3 Annex C (normative) Possible test set-ups for common mode measurements .49 Annex D (informative) Schematic diagrams of examples of impedance stabilization networks (ISN)

17、 56 Annex E (informative) Parameters of signals at telecommunication ports 65 Annex F (informative) Rationale for disturbance measurements and methods on telecommunications ports68 Annex G (informative) Operational modes for some types of ITE 77 Bibliography78 Figure 1 Test site .32 Figure 2 Minimum

18、 alternative measurement site .33 Figure 3 Minimum size of metal ground plane .33 Figure 4 Example test arrangement for tabletop equipment (conducted and radiated emissions) (plan view).34 Figure 5 Example test arrangement for tabletop equipment (conducted emission measurement - alternative 1a)35 Fi

19、gure 6 Example test arrangement for tabletop equipment (conducted emission measurement alternative 1b) 35 Figure 7 Example test arrangement for tabletop equipment (conducted emission measurement alternative 2) .36 Figure 8 Example test arrangement for floor-standing equipment (conducted emission mea

20、surement) 37 Figure 9 Example test arrangement for combinations of equipment (conducted emission measurement)38 Figure 10 Example test arrangement for tabletop equipment (radiated emission measurement).38 Figure 11 Example test arrangement for floor-standing equipment (radiated emission measurement)

21、 39 Figure 12 Example test arrangement for floor-standing equipment with vertical riser and overhead cables (radiated and conducted emission measurement) .40 Figure 13 Example test arrangement for combinations of equipment (radiated emission measurement)41 Figure A.1 Typical antenna positions for al

22、ternate site NSA measurements.45 Figure A.2 Antenna positions for alternate site measurements for minimum recommended volume.46 Figure B.1 Decision tree for peak detector measurements 48 Figure C.1 Using CDNs described in IEC 61000-4-6 as CDN/ISNs 50 Figure C.2 Using a 150 load to the outside surfac

23、e of the shield (“in situ CDN/ISN“)51 Figure C.3 Using a combination of current probe and capacitive voltage probe with a table top EUT52 Figure C.4 Calibration fixture54 Figure C.5 Flowchart for selecting test method .55 Figure D.1 ISN for use with unscreened single balanced pairs 56 Figure D.2 ISN

24、 with high longitudinal conversion loss (LCL) for use with either one or two unscreened balanced pairs .57 Figure D.3 ISN with high longitudinal conversion loss (LCL) for use with one, two, three, or four unscreened balanced pairs.58 SANS 222:2009This standard may only be used and printed by approve

25、d subscription and freemailing clients of the SABS. 4 CISPR 22 IEC:2008 Figure D.4 ISN, including a 50 source matching network at the voltage measuring port, for use with two unscreened balanced pairs.59 Figure D.5 ISN for use with two unscreened balanced pairs 60 Figure D.6 ISN, including a 50 sour

26、ce matching network at the voltage measuring port, for use with four unscreened balanced pairs61 Figure D.7 ISN for use with four unscreened balanced pairs .62 Figure D.8 ISN for use with coaxial cables, employing an internal common mode choke created by bifilar winding an insulated centre-conductor

27、 wire and an insulated screen-conductor wire on a common magnetic core (for example, a ferrite toroid)62 Figure D.9 ISN for use with coaxial cables, employing an internal common mode choke created by miniature coaxial cable (miniature semi-rigid solid copper screen or miniature double-braided screen

28、 coaxial cable) wound on ferrite toroids 63 Figure D.10 ISN for use with multi-conductor screened cables, employing an internal common mode choke created by bifilar winding multiple insulated signal wires and an insulated screen-conductor wire on a common magnetic core (for example, a ferrite toroid

29、).63 Figure D.11 ISN for use with multi-conductor screened cables, employing an internal common mode choke created by winding a multi-conductor screened cable on ferrite toroids 64 Figure F.1 Basic circuit for considering the limits with defined TCM impedance of 150 71 Figure F.2 Basic circuit for t

30、he measurement with unknown TCM impedance 71 Figure F.3 Impedance layout of the components used in Figure C.273 Figure F.4 Basic test set-up to measure combined impedance of the 150 and ferrites 74 Table 1 Limits for conducted disturbance at the mains ports of class A ITE.11 Table 2 Limits for condu

31、cted disturbance at the mains ports of class B ITE12 Table 3 Limits of conducted common mode (asymmetric mode) disturbance at telecommunication ports in the frequency range 0,15 MHz to 30 MHz for class A equipment.12 Table 4 Limits of conducted common mode (asymmetric mode) disturbance at telecommun

32、ication ports in the frequency range 0,15 MHz to 30 MHz for class B equipment.12 Table 5 Limits for radiated disturbance of class A ITE at a measuring distance of 10 m.13 Table 6 Limits for radiated disturbance of class B ITE at a measuring distance of 10 m.13 Table 7 Limits for radiated disturbance

33、 of Class A ITE at a measurement distance of 3 m.13 Table 8 Limits for radiated disturbance of Class B ITE at a measurement distance of 3 m.14 Table 9 Acronyms used in figures.32 Table A.1 Normalized site attenuation (A N(dB) for recommended geometries with broadband antennas .44 Table F.1 Summary o

34、f advantages and disadvantages of the methods described in Annex C69 SANS 222:2009This standard may only be used and printed by approved subscription and freemailing clients of the SABS.CISPR 22 IEC:2008 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENC

35、E _ INFORMATION TECHNOLOGY EQUIPMENT RADIO DISTURBANCE CHARACTERISTICS LIMITS AND METHODS OF MEASUREMENT FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The

36、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 Specific

37、ations (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 l

38、iaising 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 exp

39、ress, 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 Commi

40、ttees 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 Nation

41、al 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 provides no m

42、arking 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 of this publication. 7) No liability shall attach to IEC or its directors, employees, serv

43、ants 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 publicati

44、on, 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

45、 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 22 has been prepared by CISPR subcommittee I: Electromagnetic compatibility of information technology

46、equipment, multimedia equipment and receivers. This sixth edition of CISPR 22 cancels and replaces the fifth edition published in 2005, its Amendment 1 (2005) and Amendment 2 (2006).This edition constitutes a minor revision. The document CISPR/I/265/FDIS, circulated to the National Committees as Ame

47、ndment 3, led to the publication of the new edition. SANS 222:2009This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 6 CISPR 22 IEC:2008 The text of this standard is based on the fifth edition, Amendment 1, Amendment 2 and the following documents

48、: FDIS Report on voting CISPR/I/265/FDIS CISPR/I/271/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. The committee has decided

49、that the contents of the base publication and its amendments will remain unchanged until the maintenance result 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. SANS 222:2009This standard may only be used and printed by approved subscription