1、 Amendment 1 Information technology equipment Radio disturbance characteristics Limits and methods of measurement For price,see current catalogue IEC 2005 Copyright-all rights reserved No part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,incl
2、uding photocopying and microfilm,without permission in writing from the publisher.International 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 INTERNATIONAL ELECTROTECHNICAL CO
3、MMISSION CISPR22 2005AMENDMENT 12005-07 D Commission Electrotechnique InternationaleInternational Electrotechnical Commission PRICE CODE This English-language version is derived from the original bilingual publication by leaving out all French-language pages.Missing page numbers correspond to the Fr
4、ench-language pages.INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE CISPR 22 Amend.1 IEC:2005 3 FOREWORD This amendment has been prepared by CISPR,subcommittee I:Electromagnetic compatibility of information technology equipment,multimedia equipment and receivers.The text of this amendment is b
5、ased on the following documents:FDIS Report on voting CISPR/I/151/FDIS CISPR/I/161/RVD Full information on the voting for the approval of this amendment can be found in the report on voting indicated in the above table.The committee has decided that the contents of this amendment and the base public
6、ation 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http:/webstore.iec.ch in the data related to the specific publication.At this date,the publication will be reconfirmed,withdrawn,replaced by a revised edition,or amended._ Page 3 CONTENTS Add,below titl
7、e of Clause 6,the titles of the following new subclauses:6.1 Limits below 1 GHz 6.2 Limits above 1 GHz Modify the titles of subclauses 10.2 to 10.5 and add the title of the new subclause 10.6,as follows:10.2 Measuring receiver below 1 GHz 10.3 Antenna below 1 GHz 10.4 Measurement site below 1 GHz 10
8、.5 EUT arrangement below 1 GHz 10.6 Radiated emission measurements above 1 GHz Change the numbering of subclauses 10.6,10.7 and 10.8 to 10.7,10.8 and 10.9.CISPR 22 Amend.1 IEC:2005 5 Page 23 6 Limits for radiated disturbance Insert below the title of Clause 6 the following new title.6.1 Limits below
9、 1 GHz The text of this new subclause is that of the existing Clause 6.Add the following new subclause.6.2 Limits above 1 GHz The EUT shall meet the limits of Table 8 or Table 9 when measured in accordance with the method described in Clause 10 and the conditional testing procedure described below.T
10、able 8 Limits for radiated disturbance of Class A ITE at a measurement distance of 3 m Frequency range GHz Average limit dB(V/m)Peak limit dB(V/m)1 to 3 56 76 3 to 6 60 80 NOTE The lower limit applies at the transition frequency.Table 9 Limits for radiated disturbance of Class B ITE at a measurement
11、 distance of 3 m Frequency range GHz Average limit dB(V/m)Peak limit dB(V/m)1 to 3 50 70 3 to 6 54 74 NOTE The lower limit applies at the transition frequency.Conditional testing procedure:The highest internal source of an EUT is defined as the highest frequency generated or used within the EUT or o
12、n which the EUT operates or tunes.If the highest frequency of the internal sources of the EUT is less than 108 MHz,the measurement shall only be made up to 1 GHz.If the highest frequency of the internal sources of the EUT is between 108 MHz and 500 MHz,the measurement shall only be made up to 2 GHz.
13、CISPR 22 Amend.1 IEC:2005 7 If the highest frequency of the internal sources of the EUT is between 500 MHz and 1 GHz,the measurement shall only be made up to 5 GHz.If the highest frequency of the internal sources of the EUT is above 1 GHz,the measurement shall be made up to 5 times the highest frequ
14、ency or 6 GHz,whichever is less.Page 55 10 Method of measurement of radiated disturbance Modify the title of 10.2(“Measuring receivers”)as follows:10.2 Measuring receiver below 1 GHz Modify the title of 10.3(“Antenna”)as follows:10.3 Antenna below 1 GHz Modify the title of 10.4(“Measurement site”)as
15、 follows:10.4 Measurement site below 1 GHz Modify the title of 10.5(“EUT arrangement”)as follows:10.5 EUT arrangement below 1 GHz Add a new subclause 10.6 as follows and renumber the existing subclauses 10.6,10.7 and 10.8 as 10.7,10.8 and 10.9 respectively.10.6 Radiated emission measurements above 1
16、 GHz The measurement instrumentation shall be as defined in 8.2 of CISPR 16-1-1.The measuring antennas shall be as defined in 4.6 of CISPR 16-1-4.The measuring site shall be as described in Clause 8 of CISPR 16-1-4.The measurement method shall be as specified in 7.3 of CISPR 16-2-3.The peak detector limits shall not be applied to disturbances produced by arcs or sparks that are high voltage breakdown events.Such disturbances arise when ITE devices contain or control mechanical switches that cont
