1、 IEC 62153-4-12Edition 1.0 2009-08INTERNATIONAL STANDARD Metallic communication cable test methods Part 4-12:Electromagnetic compatibility(EMC)Coupling attenuation or screening attenuation of connecting hardware Absorbing clamp method IEC 62153-4-12:2009(E)colourinsideLICENSED TO MECON Limited.-RANC
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9、 Service Centre FAQ or contact us:Email:csciec.ch Tel.:+41 22 919 02 11 Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALORE,FOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.IEC 62153-4-12Edition 1.0 2009-08INTERNATIONAL STANDARD Metallic communication cable test met
10、hods Part 4-12:Electromagnetic compatibility(EMC)Coupling attenuation or screening attenuation of connecting hardware Absorbing clamp method INTERNATIONAL ELECTROTECHNICAL COMMISSION MICS 33.100;33.120.20 PRICE CODEISBN 2-8318-1053-8 Registered trademark of the International Electrotechnical Commiss
11、ion colourinsideLICENSED TO MECON Limited.-RANCHI/BANGALORE,FOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 62153-4-12 IEC:2009(E)CONTENTS FOREWORD.3 1 Scope.5 2 Normative references.5 3 Terms and definitions.5 4 Test method.5 4.1 Equipment.5 4.1.1 General.5 4.1.2 Balun requi
12、rements.6 4.1.3 Test head and extension cable requirements.7 4.1.4 Impedance matching.8 4.2 Test sample.8 4.2.1 Length of the extension cables.8 4.2.2 Tested length.8 4.2.3 Preparation of extension cable and test head.8 4.2.4 Balanced connecting hardware.8 4.3 Calibration procedure.9 4.4 Test set-up
13、.9 4.4.1 General.9 4.4.2 Test set-up verification.10 4.5 Measuring procedure.11 5 Expression of test results.11 6 Test report.11 6.1 General.11 6.2 Evaluation of test results.11 Figure 1 Measurement of surface wave at near end of connecting hardware.6 Figure 2 Termination of extension cables.9 Figur
14、e 3 Test set-up for a near end measurement of connecting hardware.10 Figure 4 Test set-up for a near end measurement of connecting hardware.10 Figure 5 Typical measurement of screened connecting hardware.12 Figure 6 Typical measurement of an unscreened balanced connecting hardware.13 Figure 7 Typica
15、l measurement of a screened balanced connecting hardware.13 Table 1 Balun performance characteristics(30 MHz to 1 GHz).7 LICENSED TO MECON Limited.-RANCHI/BANGALORE,FOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.62153-4-12 IEC:2009(E)3 INTERNATIONAL ELECTROTECHNICAL COMMISSION
16、 _ METALLIC COMMUNICATION CABLE TEST METHODS Part 4-12:Electromagnetic compatibility(EMC)Coupling attenuation or screening attenuation of connecting hardware Absorbing clamp method FOREWORD 1)The International Electrotechnical Commission(IEC)is a worldwide organization for standardization 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 electron