1、 ANSI C63.022-1996Except for the USA foreword,identical to CISPR 22 (1993) and Amendment 1 (1995)American National Standard for Limits and Methods of Measurement of Radio Disturbance Characteristics of Information Technology EquipmentAccredited Standards Committee on Electromagnetic Compatibility, C
2、63accredited by the American National Standards InstituteSecretariatInstitute of Electrical and Electronics Engineers, Inc.Approved 27 September 1996American National Standards InstituteAbstract: Emission limits are provided that are an are acceptable alternative for limits of the current issueof FC
3、C Part 15, Subpart B, for Information Technology Equipment (ITE). This document republishesCISPR 22 (1993) and Amendment 1 (1995) as an American National Standard, ANSI C63.022-1996, whichis recognized within the U.S.Keywords: conducted emissions, emission limits, emission measurement, information t
4、echnologyequipment, radiated emissions, radio disturbance, radio interferenceThe Institute of Electrical and Electronics Engineers, Inc.345 East 47th Street, New York, NY 10017-2394, USACopyright 1997 by the Institute of Electrical and Electronics Engineers, Inc.All rights reserved. Published 1997.
5、Printed in the United States of America.ISBN 1-55937-924-3No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without theprior written permission of the publisher.American National StandardAn American National Standard implies a consensus of tho
6、se substantially concerned with its scope and provisions.An American National Standard is intended as a guide to aid the manufacturer, the consumer, and the general public.The existence of an American National Standard does not in any respect preclude anyone, whether he has approved thestandard or n
7、ot, from manufacturing, marketing, purchasing, or using products, processes, or procedures notconforming to the standard. American National Standards are subject to periodic review and users are cautioned toobtain the latest editions.CAUTION NOTICE:This American National Standard may be revised or w
8、ithdrawn at any time. The procedures ofthe American National Standards Institute require that action be taken to reafrm, revise, or withdraw this standard nolater than ve years from the date of publication. Purchasers of American National Standards may receive currentinformation on all standards by
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11、 Center.iiiIntroduction(This introduction is not part of ANSI C63.022-1996, American National Standard for Limits and Methods of Measurement ofRadio Disturbance Characteristics of Information Technology Equipment.)At the time that the Accredited Standards Committee on Electromagnetic Compatibility,
12、C63, approved this standard,it had the following membership:Ralph M. Showers, Chair Edwin L. Bronaugh, Vice Chair Rosemary Tennis, Secretary ACIL Ross A. HansenWalter PoggiAlliance for Telecommunications Industry Solutions John F. LichtigO. J. Gusella (alt.)American Automobile Manufacturers Associat
13、ion (AAMA) Terry RybakBarbara WendlingAmerican Radio Relay League .Hugh TurnbullEdward F. HareAeronautical Radio, Inc. (ARINC) Dan MartinacPaulPrisaznukAssociation of American Railroads. Chris AllmanAssociation of Telecommunication Attorneys .Glen DashJon Curtis (alt.)Canadian Standards Association
14、vacantCellular Telephone Industry Association . vacantCenter for the Study of Wireless EMC Hank GrantBob SchlegelElectric Light and Power Group, EEI vacantGary N Miller (alt.)Electronic Industries Association (G-46 Chair) John C. WindellElectronic Industries Association. Ralph JustusESD Association
15、Douglas C. SmithFederal Communications Commission (Chair SC-3) Richard B. EngelmanFederal Communications Commission . L. A. (Art) WallHugh L. Van Tuyl (alt.)Food and Drug AdministrationPaul RuggeraJeffrey Silberberg (alt.)Health Industry Manufacturers Association Eric V. AndersonRandall L. Anderson
16、(alt.)Hewlett-Packard Company Ray MagnusonInstitute of Electrical and Electronics Engineers, Inc. Edwin L. BronaughDonald N. HeirmanNestor KolcioMembers-at-Large.Ralph CalcavecchioRobert J. EganWarren A. KesselmanArthur H. LightRichard B. SchulzRalph M. ShowersJ. L. Norman VioletteInformation Techno
17、logy Industry Council (ITI) .William T. RhoadesWilliam F. Hanrahan (alt.)ivLucent Technologies-Bell LabsH. R. HofmannNational Electrical Manufacturers Association (NEMA) William J. MurphyKenneth E. Gettman (alt.)National Aeronautics and Space Administration vacantNational Association of Broadcasters
18、 Kelly WilliamsMarvin Ziskin (alt.)Personal Computer Bill C. WongRadio Shack Engineering. Mac SlaytonSAE (Land Vehicle) Paul AndersenSAE (Chair AE-4) David A. GrahamSAE (Aerospace).Herbert MertelSouthwest Research Institute (SwRI) James J. PolonisTelecom. Industry Association Eric J. SchimmelTUV Pro
19、duct Service Daniel D. HoolihanUnderwriters Laboratories, Inc. Willard TuthillCorey Hyatt (alt.)Unisys Corporation . Wallace AmosU. S. Department of the Air Force .John ZentnerDennis Baseley (alt.)U. S. Department of Commerce (National Institute of Standards and Technology)Motohisa KandaU. S. Depart
20、ment of Commerce (National Technical Information Agency).Karl NebbiaU. S. Department of Energy (Oak Ridge National Laboratory) Paul EwingU. S. Department of Energy (Bonneville Power Administration) Vernon L. ChartierU. S. Department of Energy (Western Area Power Administration)Scott E. JohnsonU. S.
21、Department of the Navy. Stephen CaineMarcus Shellman (alt.)U. S. Department of Transportation (Federal Aviation Admininistration) Robert FrazierWIN Forum, AT their existence does not in any respect precludeanyone, whether he has approved the standards or not, from manufacturing, marketing, purchasin
22、g, or using products,processes, or procedures not conforming to the standards.The American National Standards Institute does not develop standards and will in no circumstances give aninterpretation of any American National Standard. Moreover, no person shall have the right or authority to issue anin
23、terpretation of an American National Standard in the name of the American National Standards Institute. Requestsfor interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of thisstandard.4. Technical comparison of CISPR 22 and FCC Part 15B limitsThe FC
24、C endorses the use of CISPR 22 emission limits as an alternative to FCC Part 15B limits for digital devicesprovided that the data is obtained per the measurement procedures of ANSI C 63.4-1992. Since these measurementprocedures are similar to measurement procedures specied in CISPR 16, a commonality
25、 of measurement proceduresexist. One of the major differences is that the FCC allows measurements of personal computers for radiated emissionsat a 3 m test distance whereas CISPR measures at 10 m but allows extrapolation of data from the 3 m to the 10 mdistance. The FCC also allows extrapolation of
26、data from the 10 m distance to the 3 m distance. However, extrapolationshould be viewed with extreme caution.The other major difference is that CISPR 22 requires maximization of all emissions, whereas ANSI C63.4-1992maximizes the highest emissions with respect to the limit. Hence the reason for the
27、FCC selecting the ANSI C63.4-1992 procedures for its exibility and more detailed measurement methods. Note that the proposed next edition ofCISPR 22 will incorporate most of the procedures in ANSI C63.4-1992 , leading to further harmonization.4.1 Note on limit classesThe FCC Part 15 emission protect
28、ion limits are divided into the more restrictive residential/domestic (Class B) and, theless restrictive commercial/industrial (Class A) limit classes (environments). In the USA and in Canada the limitclassications are set by manufacturers and depend on how the product is marketed. CISPR 22 also all
29、ows themanufacturer to set the classication of equipment, but requires a warning statement that assigns responsibility to theuser for correction of any interference problems that may occur if the Class A equipment is installed in a domesticenvironment.In the European Union (EU) product standards exi
30、st for a number of product families, e.g., ITE; household appliances;receivers; industrial, scientic and medical (ISM) equipment; etc. If a product standard does not exist for a givenproduct, the generic standard is applied instead. This generic standard requires that equipment for use in residentia
31、l,commercial, and light industry environments conform to the Class B limits of CISPR 22.Copyright 1997 IEEE All Rights Reserved3CISPR 22 (1993) and AMENDMENT 1 (1995) ANSI C63.022-19964.2 Conducted emission limit voltage on power lines4.2.1 Class B equipmentFigure 1 shows a comparison of the Class B
32、 conducted power line limits. It must be noted that the CISPR measurementrange starts at 0.15 MHz and the FCC starts at 0.45 MHz, and both end at 30 MHz. The average detector limit is 10 dBlower for CISPR than the associated quasi-peak detector limit.The FCC denes a lower limit differently. The foll
33、owing wording comes from ANSI C63.4-1992 , 11.5.2: If theamplitude measured in the quasi-peak mode is at least 6 dB higher than the amplitude measured in the average mode,the level measured in the quasi-peak mode may be reduced by 13 dB before comparing it to the limit. If the 13 dBreduced quasi-pea
34、k mode level is below the limit, the EUT is considered to have met the limit requirements.Figure 1 Power line conducted emission limit specified in FCC Part 15B and CISPR 22 for Class B ITE4.2.2 Class A equipmentFigure 2 shows the comparison of the Class A conducted power line limits. The CISPR meas
35、urement range starts at0.15 MHz and the FCC starts at 0.45 MHz and both The average detector limit is 13 dB lower for CISPR than thequasi-peak detector limit. The -13 dB rule applies to the FCC limit as described in 4.2.1.4.3 Radiated emission limitsThe radiated emission limits for Class A and B are
36、 shown in Figure 3. The data is normalized for a 10 m measurementdistance using linear distance extrapolation.NOTE The measurement distance in CISPR 22 for both Class A and Class B equipment is set at 10 m. The FCC Part 15measurement distance for Class B equipment is 3 m. Extrapolation between 3 m a
37、nd 10 m should be viewed withextreme caution.4Copyright 1997 IEEE All Rights ReservedANSI C63.022-1996 USA FOREWORD TO5. Measurement method comparisonSince ANSI C63.4-1992 is the FCC-required document for measuring emissions, the USA acceptance of CISPR 22 islimited to the limits as discussed in Cla
38、use 4.6. ImplementationUse of CISPR 22 limits shall be noted when applying this standard in demonstrating compliance with USA FCCRegulations. A positive statement to the use of ANSI C63.4-1992 measurement procedures shall also be made.Figure 2 Power line conducted emission limit specified in FCC Par
39、t 15B and CISPR 22 for Class A ITECopyright 1997 IEEE All Rights Reserved5CISPR 22 (1993) and AMENDMENT 1 (1995) ANSI C63.022-1996Figure 3 Radiated emission limit at 10 m specified in FCC Part 15B and CISPR 22 for Class A and B ITE6Copyright 1997 IEEE All Rights ReservedANSI C63.022-1996 USA FOREWOR
40、D TOCISPR 22Second edition1993-12INTERNATIONAL ELECTROTECHNICAL COMMISSIONLimits and methods of measurement of radio disturbance characteristics of information technology equipment CEI 1993 Copyrightall rights reservedReference number CISPR 22: 1993Copyright 1997 IEEE All Rights Reserved7CISPR 22 (1
41、993) and AMENDMENT 1 (1995) ANSI C63.022-1996Revision or this publicationThe technical content of IEC and C.I.S.P.R. publications is kept under constant review by the IEC and C.I.S.P.R., thusensuring that the content reects current technology.Information on the work of revision, the issue of revised
42、 editions and amendment sheets may be obtained from IECNational Committees and from the following IEC sources:IEC BulletinIEC YearbookCatalogue of IEC Publications Published yearlyTerminology used in this publicationOnly special terms required for the purpose of this publication are dened herein.For
43、 general terminology, readers are referred to IEC Publication 50: International Electrotechnical Vocabulary (IEV),which is issued in the form of separate chapters each dealing with a specic eld, the General Index being publishedas a separate booklet. Full details of the IEV will be supplied on reque
44、st.For terms on radio interference, see Chapter 902.Graphical and letter symbolsFor graphical symbols, and letter symbols and signs approved by the IEC for general use, readers are referred to:IEC Publication 27: Letters symbols to be used in electrical technology;IEC Publication 617: Graphical symb
45、ols for diagrams.The symbols and signs contained in the present publication have either been taken from IEC Publications 27 or 617,or have been specically approved for the purpose of this publication.C.I.S.P.R. publicationsThe attention of readers is drawn to pages 3 and 4 of the cover, which list C
46、.I.S.P.R. publicationsCORRIGENDUMFigure 1, replace the existing diagram by the new diagram below:8Copyright 1997 IEEE All Rights ReservedANSI C63.022-1996 USA FOREWORD TOCISPR 22Second edition1993-12INTERNATIONAL ELECTROTECHNICAL COMMISSIONLimits and methods of measurement of radio disturbance chara
47、cteristics of information technology equipmentCopyright 1997 IEEE All Rights Reserved9CISPR 22 (1993) and AMENDMENT 1 (1995) ANSI C63.022-1996CONTENTS1 Scope and object 32 Normative references .43 Definitions44 Classification of ITE 54.1 Class B ITE .54.2 Class A ITE.55 Limits for conducted disturba
48、nce.55.1 Limits for conducted disturbance at mains ports 55.2 Limits for disturbance power 66 Limits for radiated disturbance 67 Limits for disturbance power .68 Interpretation of CISPR radio disturbance limit 78.1 Significance of a CISPR limit.78.2 Application of limits in tests for conformity of e
49、quipment in series production79 General measurement conditions .89.1 EUT configuration 810 Method of measurement of conducted disturbance at mains ports910.1 Measuring receivers 910.2 Artificial Mains Network (AMN) .1010.3 Ground-plane 1111 Method of measurement of radiated disturbance.1112 Measurement of disturbance power .13Annex A (normative)Site attenuation measurements of alternative test sites.16-2- CISPR 22 IEC:199310Copyright 1997 IEEE All Rights ReservedANSI C63.022-1996 USA FOREWORD TOFOREWORD1) The formal decisions of the CISPR on
