1、BRITISH STANDARD BS EN 62153-4-2:2004 Metallic communication cables test methods Part 4-2: Electromagnetic compatibility (EMC) Screening and coupling attenuation Injection clamp method The European Standard EN 62153-4-2:2004 has the status of a British Standard ICS 33.100; 33.120.10 BS EN 62153-4-2:
2、2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 19 February 2004 BSI 19 February 2004 ISBN 0 580 43397 8 National foreword This British Standard is the official English language version of EN 62153-4-2:2004. It is identical with IEC 6215
3、3-4-2:2003. The UK participation in its preparation was entrusted by Technical Committee EPL/46, Cables, wires, waveguides, R.F. connectors, R.F. and microwave passive components and accessories, to Subcommittee EPL/46/1, Communication cables, which has the responsibility to: A list of organizations
4、 represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Corresponden
5、ce Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itse
6、lf confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and p
7、romulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 22, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since p
8、ublication Amd. No. Date CommentsEUROPEAN STANDARD EN 62153-4-2 NORME EUROPENNE EUROPISCHE NORM January 2004 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de St
9、assart 35, B - 1050 Brussels 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62153-4-2:2004 E ICS 33.100;33.120.10 English version Metallic communication cables test methods Part 4-2: Electromagnetic compatibility (EMC) Scree
10、ning and coupling attenuation Injection clamp method (IEC 62153-4-2:2003) Mthodes dessai des cbles mtalliques de communication Partie 4-2: Compatibilit lectromagntique (CEM) - Affaiblissement dcran et de couplage - Mthode de la pince injection (CEI 62153-4-2:2003) Prfverfahren fr metallische Kommuni
11、kationskabel Teil 4-2: Elektromagnetische Vertrglichkeit (EMV) Schirm- und Kopplungsdmpfung - Verfahren mit gespeister Zange (IEC 62153-4-2:2003) This European Standard was approved by CENELEC on 2003-12-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulat
12、e the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard e
13、xists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national el
14、ectrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 6512
15、3-4-2:0240 - - 2 Foreword The text of document 46A/560/FDIS, future edition 1 of IEC 62153-4-2, prepared by SC 46A, Coaxial cables, of IEC TC 46, Cables, wires, waveguides, r.f. connectors, r.f. and microwave passive components and accessories, was submitted to the IEC-CENELEC parallel vote and was
16、approved by CENELEC as EN 62153-4-2 on 2003-12-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2004-09-01 latest date by which the national standards conflicting with the
17、EN have to be withdrawn (dow) 2006-12-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 62153-4-2:2003 was approved by CENELEC as a European Standard without any modification. _ Page2 EN6215342:2004 3 261-35-42 IE:C0023 CONTENTS FOREWORD.2 1 Scope
18、.4 2 Normative references.4 3 Terms, definitions and symbols 4 3.1 Electrical symbols.5 3.2 Definitions.6 4 Principle.6 4.1 Injecting mode.7 5 Procedure7 5.1 Test equipment.7 5.2 Preparation of test sample.8 5.2.1 Effective cable length8 5.2.2 Total cable length8 5.2.3 Inner termination of balanced
19、cables .9 5.2.4 Inner termination of coaxial (unbalanced) cables .9 5.2.5 Connection of the screen.9 5.2.6 Height of CUT over the ground plane.9 5.2.7 Termination plates.10 5.2.8 Complete preparation10 5.3 Calibration procedure10 5.3.1 Connecting coaxial cables .10 5.3.2 Electromagnetic injection cl
20、amp10 5.3.3 Balun (if applicable).11 5.4 Measuring procedure.11 6 Evaluation of the test results 12 7 Requirement.12 Fiugre 1 I nner sysmeto f a screenedu/nscreenedt wsietp dair calbe. 31 Fiugre2 O uters ystmei nc ase ofu nscreened twiset dpairc able 31 Fiugre3 Printedc irciu twith -FRS-DMrsesitorsf
21、 ori nenrs ysmetm acthign 41 Fiugre4 T ermniaito npl eor nera-edn anf dar-nedm acthign . 41 Fiugre 5 Termniaito-npltap eanela tt hn eeare nd. 51 Fiugre 6 Termniaito-npltap eanela tt h efare nd 61 Fiugre 7 P rperataio noft ests ampel . 71 Figru8 e Operitalano attuneitano ofc oennnitcc goaxlaic ables
22、. 81 Fiugre9 Se-tuf porr efercneea tteuntaio na rfe . 91 Fiugre1 0 Se-tpuf orr efreecn eattneutaino a clma,pfer . 91 FigrudnI 11 eiudivepo laritalano atetaunoito nf thr( eeineditca)l banuls 02 Fiugre1 2 Twob alsnu ins erisef ora no-ncyclcials usbtiuttioc nalibratoi nprcoedrue. 02 Fiugre1 3 Deviatoin
23、o f atetnuatoina sp ossiblee rrors oruce . 12 Fiugre1 4 Completet ess te-tup 12Talbe1 Elcertcilas ymbols . 5 Page3 EN6215342:2004 3 62153-4-2 IEC:2003 COTNENTS FOREWORD.2 1 Scpoe. 4 2 roNmtaiv e referecnse. 4 3 Termsfed ,intiiosn ands ymslob 4 3.1E lcertcila symbols. 5 3.2feD iniitons.6 4 Principle.
24、 6 4.1jnI ecting mode. 7 5 Prcoedure 7 5.1T es t equimpent. 7 5.2 Prperataio noft ests ample. 8 521E ffectiv e cabl e legnth 8 522T oat l cable length 8 523 Innerret minatoin ofb alacned cablse . 9 5.2. 4 Inenr termniitao nofc oaxlai( ulabnnaced)c aelbs . 9 525 Concentiono ft h escreen. 9 526 Heigho
25、 tfTUC ovre thg eruondp lnae. 9 527T ermtaniio n platse. 01 528moC pleet preparation 01 5.3C alibration prcoderue 01 531 Concentingc oxaailc ables . 01 532E lcertmogaentic injeciton clmap 01 533B alu n (if applcibale). 11 5.4M esarunig prcoderue. 11 6 Evlauation oft ht eesr tesustl 21 7 Requrimenet.
26、2Figure 1 Inner system of a screened/unscreened twisted pair cable.13 Figure 2 Outer system of an unscreened twisted pair cable .13 Figure 3 Printed circuit with RF-SMD-resistors for inner system matching14 Figure 4 Termination plate for near-end and far-end matching .14 Figure 5 Termination-plate p
27、anel at the near end.15 Figure 6 Termination-plate panel at the far end16 Figure 7 Preparation of test sample .17 Figure 8 Operational attenuation of connecting coaxial cables .18 Figure 9 Set-up for reference attenuation a ref .19 Figure 10 Set-up for reference attenuation a clamp, ref .19 Figure 1
28、1 Individual operational attenuation of three (identical) baluns 20 Figure 12 Two baluns in series for a non-cyclical substitution calibration procedure.20 Figure 13 Deviation of attenuation as possible error source .21 Figure 14 Complete test set-up21 Table 1 Electrical symbols .5 Pa3eg E4002:24351
29、26N Annex ZA (normative) Normative references to international publications with their corresponding European publications . 22 4 261-35-42 IE:C0023 METALLIC COMMUNICATION CABLE TEST METHODS Part 4-2: Electromagnetic compatibility (EMC) Screening and coupling attenuation Injection clamp method 1 Sco
30、pe This part of IEC 62153 describes the injection clamp test method which determines the screening attenuation (a s ) of coaxial cables and the coupling attenuation (a c ) of balanced shielded or unshielded data cables in a frequency range from 30 MHz up to 1 000 MHz and in a dynamic range up to 130
31、 dB. NOTE 1 Contrary to the absorbing clamp method, the method described here uses an injection clamp according to IEC 61000-4-6. NOTE 2 Due to the low operational attenuation of the injection clamp, the coupling attenuation and the screening attenuation can be determined in a dynamic range up to 13
32、0 dB with common measuring equipment. Using an amplifier the dynamic range can be additionally improved. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the
33、 latest edition of the referenced document (including any amendments) applies. IEC 61000-4-6: Electromagnetic compatibility (EMC) Part 4-6: Testing and measurement techniques Immunity to conducted disturbances, induced by radio-frequency fields ITU-T Recommendation G.117:1996, Transmission aspects o
34、f unbalance about earth ITU-T Recommendation O.9:1999, Measuring arrangements to assess the degree of unbalance about earth 3 Terms, definitions and symbols For the purposes of this document, the following terms, definitions and symbols apply. Page4 EN6215342:2004 5 261-35-42 IE:C0023 3.1 Electrical
35、 symbols Table 1 Electrical symbols a balunOperational attenuation of the balun transformer a cable12Operational attenuation of the connecting coaxial cables a cCoupling attenuation a sScreening attenuation a calOperational attenuation of the test set-up a cal,farOperational attenuation of the test
36、set-up for far end a cal,nearOperational attenuation of the test set-up for near end a clampOperational attenuation of the clamp a clamp,refReference attenuation ofthe clamp during calibration a ferriteFerrite common-mode rejection a nmUnbalance attenuation of the balun transformers a unUnbalance at
37、tenuation of the CUT a CUTlongOperational attenuation of the CUT a refReference attenuation ofthe calibration set-up CUT Cable under test d Screen diameter r,outer-systemRelative dielectric permittivity of the outer system frangeFrequency h Height of the cable centre above groundplane P in,clampFeed
38、ing power into clamp P 1,maxMax.received power at the inner system P 1,nearReceived power at the inner system for the near-end position P 1,farReceived power at the inner system for the far-end position P 2com,maxMax. feeding power of the outer system P 2com,nearFeeding power of outer system for the
39、 near-end position P 2com,farFeeding power of outer system for the far-end position R cmCommon-mode impedance R 1 , R 2Termination resistors for the inner system R termTermination plates (150 in the specified frequency range) Z CUT,innCharacteristic impedance of the inner system Z CUT,outCharacteris
40、tic impedance of the outer system Z in,clampInput impedance of the clamp (50 ) Z out,clampOutput impedance of the clamp (150 ) Z out,gen (Z o ) Output impedance of the generator (50 ) Z termTermination plates (150 in the specified frequency range) Page5 EN6215342:2004 6 261-35-42 IE:C0023 3.2 Defini
41、tions 3.2.1 inner system system consisting of the inner conductor and the screen for coaxial lines and of the differential mode signal-carrying two-core conductor for twisted-pair cables (see Figure 1) 3.2.2 outer system system consisting of the screen and the surrounding for coaxial lines, and repr
42、esented by the common-mode propagation between the two-core conductor and the surrounding for unscreened twisted-pair cables and by the screen of the CUT and the surrounding for screened twisted-pair cables (see Figure 2) 3.2.3 screening and coupling attenuation relation between the transmitted powe
43、r through the conductor(s) and the maximum radiated peak power, conducted and generated by the excited common-mode currents or vice versa 3.2.4 coupling attenuation for coaxial cables for coaxial cables coupling attenuation a cis the same as screening attenuation a sTaking into account the maximum e
44、ffect of either near- or far-end surface waves, the coupling attenuation a cor screening attenuation a sis specified by log 20 10 = = max 1, max 2com, s c P P a a where P 1,maxis the maximumreceived power at the inner system; P 2com,maxis the maximum feeding power of the outer system. 3.2.5 coupling
45、 attenuation for balanced cables for screened balanced cables the coupling attenuation a c is the sum of screening attenuation a sand unbalance attenuation a un . un s c a a a + = For unscreened balanced cables the coupling attenuation a cis equal to the unbalance attenuation a un . un c a a = 4 Pri
46、nciple Using an injection clamp according to IEC 61000-4-6, it is equivalent if the power is injected or detected in the outer circuit (law of reprocity). To qualify high-performance cables and to reach the high dynamic range, the power should be injected into the outer circuit. When testing CUT wit
47、h a coupling attenuation of less than 90 dB the reverse (detecting) mode is also possible. When testing high-performance cables in the injecting mode, the use of a screened chamber is recommended. Page6 EN6215342:2004 7 261-35-42 IE:C0023 4.1 Injecting mode In the following, the injecting mode will
48、be used to describe the principle of the method when determining coupling attenuation. A common-mode electromagnetic field is injected into the outer (secondary) circuit of the cable via an injection clamp, while the signal in the inner (primary) circuit is detected. In the case of balanced cables t
49、he resulting differential-mode signal in the inner system is detected via a well-balanced balun transformer. To prevent reflections, the outer system is well matched by two termination plates, which are placed at the near end and at the far end of the 6 m extended test set-up. The inner system of the CUT is matched at
