IEC PAS 62825-2013 Methods of measurement and limits for radiated disturbances from plasma display panel TVs in the frequency range 150 kHz to 30 MHz (Edition 1.pdf

1、 IEC/PAS 62825 Edition 1.0 2013-01 PUBLICLY AVAILABLE SPECIFICATION PRE-STANDARD Methods of measurement and limits for radiated disturbances from plasma display panel TVs in the frequency range 150 kHz to 30 MHz IEC/PAS 62825:2013(E) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 20

2、13 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, 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 either IEC or IECs member National Co

3、mmittee in the country of the requester. If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information. IEC Central Office Tel.: +41 22 919 0

4、2 11 3, rue de Varemb Fax: +41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technolo

5、gies. About IEC publications The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigenda or an amendment might have been published. Useful links: IEC publications search - www.iec.ch/searchpub The advanced search

6、 enables you to find IEC publications by a variety of criteria (reference number, text, technical committee,). It also gives information on projects, replaced and withdrawn publications. IEC Just Published - webstore.iec.ch/justpublished Stay up to date on all new IEC publications. Just Published de

7、tails all new publications released. Available on-line and also once a month by email. Electropedia - www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing more than 30 000 terms and definitions in English and French, with equivalent terms in additio

8、nal languages. Also known as the International Electrotechnical Vocabulary (IEV) on-line. Customer Service Centre - webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC/PAS 62825 Edition 1.

9、0 2013-01 PUBLICLY AVAILABLE SPECIFICATION Methods of measurement and limits for radiated disturbances from plasma display panel TVs in the frequency range 150 kHz to 30 MHz INTERNATIONAL ELECTROTECHNICAL COMMISSION M ICS 33.100.10 PRICE CODE ISBN 978-2-83220-568-6 Registered trademark of the Intern

10、ational Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. PRE-STANDARD colour inside 2 PAS 62825 IEC:2013(E) CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope . 7 2 Normative references . 7 3 Terms and definitions . 8 4 Limits for electrom

11、agnetic disturbances 8 General . 8 4.1Limits for radiated RF disturbances in the frequency range 150 kHz to 4.2 30 MHz 8 5 Measurement requirements 9 Ambient noise . 9 5.1Test sites 9 5.2Measuring equipment 9 5.3Measuring receiver 9 5.3.1Antenna . 9 5.3.2Configuration of the equipment under test . 1

12、0 5.4Operating conditions of the equipment under test 10 5.5 6 Measurement arrangement and procedure 10 Measurement arrangement 10 6.1Measurement procedure 10 6.2Reporting of measurement results . 10 6.3 7 Verification of the compliance of the equipment with the requirements of this specification .

13、11 Bibliography 12 Figure 1 Setup of a plasma display panel TV for magnetic-field measurement . 11 Figure 2 Top view of antenna positions relative to the EUT 11 Table 1 Limits of the magnetic field strength for large plasma display panel TVs 9 PAS 62825 IEC:2013(E) 3 INTERNATIONAL ELECTROTECHNICAL C

14、OMMISSION INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE _ METHODS OF MEASUREMENT AND LIMITS FOR RADIATED DISTURBANCES FROM PLASMA DISPLAY PANEL TVS IN THE FREQUENCY RANGE 150 KHZ TO 30 MHZ FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standar

15、dization 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 Inter

16、national 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

17、 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

18、the 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 h

19、ave 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 mi

20、sinterpretation 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 nat

21、ional 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 editio

22、n 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 direc

23、t 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 indispensab

24、le 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. A PAS is a technical specification not

25、fulfilling the requirements for a standard, but made available to the public. IEC/PAS 62825 has been processed by CISPR subcommittee I: Electromagnetic compatibility of information technology equipment, multimedia equipment and receivers. The text of this PAS is based on the following document: This

26、 PAS was approved for publication by the P-members of the committee concerned as indicated in the following document: Draft PAS Report on voting CISPR/I/417/PAS CISPR/I/424/RVD Following publication of this PAS, which is a pre-standard publication, CISPR subcommittee I may decide to incorporate the

27、contents of this PAS as it is, or in a modified form, into CISPR 13 and/or CISPR 32. 4 PAS 62825 IEC:2013(E) This PAS shall remain valid for an initial maximum period of 3 years starting from the publication date. The validity may be extended for a single 3-year period, following which it shall be r

28、evised to become another type of normative document, or shall be withdrawn. A bilingual version of this publication may be issued at a later date. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the corre

29、ct understanding of its contents. Users should therefore print this document using a colour printer. PAS 62825 IEC:2013(E) 5 INTRODUCTION The task of CISPR consists of providing methods of measurement and limits for control and limitation of RF disturbances from electric and electronic equipment, wh

30、ich may cause harmful interference to radio reception in the field. For these purposes CISPR has identified essential EMC emission requirements in the frequency range 9 kHz to 400 GHz. http:/www.iec.ch/Scope of CISPR In regard of the frequency range up to 30 MHz, minimum emission requirements for ra

31、diated RF disturbances have been established for induction cooking appliances (see CISPR 11 and CISPR 14-1) and for lighting equipment (see CISPR 15). According to the CISPR standardization policy http:/www.iec.ch/emc/pdf/cispr_standardisation_policy.pdf these requirements shall be regarded as apply

32、ing, as minimum requirements, to any type of product. In addition to the above fact it is noted that accurate measurements below 30 MHz are difficult and that the measurement method with the 60 cm loop antenna is not yet described in the CISPR 16 parts. Historically, emission standards for IT equipm

33、ent and radio broadcast receivers have addressed limits only for conducted emissions below 30 MHz (CISPR convention). This has been justified by the low “antenna efficiency” of an EUT whose dimensions are small compared with the wavelength of emission concerned, and by limited use of high-power, hig

34、h frequency electromagnetic components and circuitry within the EUT. However, the introduction of large-scale flat screen displays for many appliances such as TV-sets, traffic management and information systems, monitor walls in professional entertainment, education white boards, etc. calls into que

35、stion the convention that measurement of disturbance on external cabling is sufficient. Besides aspects of physical dimension, evolving display technologies too call for a regular re- assessment of the upper justification concerning antenna efficiency. Particular attention should be given to such te

36、chnological implementations, which use current loops in form of matrices of magnetic dipoles resulting in a large overall magnetic dipole causing significant magnetic field levels. Users of this specification are hence invited to check whether the classical CISPR convention applies to their display

37、implementations. Depending on the displays characteristics (voltage, current and size) they may decide, upon their own discretion, that measurements according to this specification can be disregarded, for principle reasons. During the annual CISPR subcommittee I Working Group (WG) 1 meeting in Sydne

38、y in 2007, a Task Force was formed to investigate radiated emissions of large Plasma TV-sets below 30 MHz following several cases of complaints of interference by amateur radio users. The TF met several times and carried out long investigations and round robin exercises in several laboratories in Ja

39、pan, Korea and Europe. The results of the investigation presented in Lyon in 2009, in Seattle in 2010, showed that supplementary requirements for control and limitation of radiated disturbances from large scale flat screen displays are necessary to enforce CISPRs mission and policy. Finally CISPR su

40、bcommittee I decided, at its meeting in Seoul in October 2011, that a PAS shall be drafted and provided to the users setting out an interim solution up until CISPR 13 or its successor CISPR 32 is supplemented with appropriate requirements. 6 PAS 62825 IEC:2013(E) Work is ongoing in CISPR subcommitte

41、e I and meanwhile also CISPR subcommittee A and CISPR subcommittee H are involved in the process of validating their respective methods of measurement and associated limits. The limits defined in this PAS have successfully taken the following points into consideration: a) Table 12 of CISPR 11:2009,

42、Amendment 1 (2010) defines limits for radiated emissions in the frequency range 9 kHz to 30 MHz for induction cooking appliances operating in residential and commercial environments. It is assumed that these limits provide adequate protection of radio reception and so formed basis for the limits in

43、this PAS. b) Current state of the art of plasma display panel TVs including economically feasible mitigation measures is such that they generate radiated emissions in the frequency range 150 kHz to 30 MHz above the limits of Table 12 of CISPR 11:2009, Amendment 1 (2010). Additionally, it is more dif

44、ficult to mitigate against low frequency magnetic field emissions below approximately 1 MHz. In particular, the emissions at the fundamental operating frequency of the displays cannot be attenuated without unacceptable loss of picture quality. Therefore a compromise was proposed in CISPR subcommitte

45、e I Working Group (WG) 1 to add 10 dB to the limits in Table 12 of CISPR 11:2009, Amendment 1 (2010). Following further discussions and review of measurements obtained from several plasma TVs manufacturers, it was noted that higher frequency emissions were more likely to meet this increased limit. E

46、missions below 3,5 MHz although typically over the limit were below the lower boundary of commonly-used radio amateur band. Therefore an additional 5 dB increase was allowed in the frequency range 150 kHz to 3,5 MHz and emissions at the fundamental frequency would be exempted from the limit. Althoug

47、h this proposal was not agreed unanimously during drafting of the PAS, consensus was reached. Therefore the limits defined in this PAS do not provide protection of radio reception in all cases. PAS 62825 IEC:2013(E) 7 METHODS OF MEASUREMENT AND LIMITS FOR RADIATED DISTURBANCES FROM PLASMA DISPLAY PA

48、NEL TVS IN THE FREQUENCY RANGE 150 KHZ TO 30 MHZ 1 Scope This Publicly Available Specification (PAS) applies to plasma display panel TVs which are intended for use in residential or commercial environments, which have a visible display area with a diagonal dimension of 1 m or greater, and which are

49、within the scope of CISPR 13 or CISPR 32. NOTE Although this PAS is applied to plasma display technology, it should be noted that in any future International Standard, or amendment to existing International Standard, it may be necessary to ensure technology neutrality. To this end, users of this PAS are invited to investigate the compliance of other display technologies with the limits of this PAS. Depending on the characteristics (voltage, current and size) of other display technologies, users may decide, upon their o