1、 IEC 62153-4-13 Edition 1.0 2009-08 INTERNATIONAL STANDARD Metallic communication cable test methods Part 4-13: Electromagnetic compatibility (EMC) Coupling attenuation of links and channels (laboratory conditions) Absorbing clamp method IEC 62153-4-13:2009(E) colour inside THIS PUBLICATION IS COPYR
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9、Fax: +41 22 919 03 00 IEC 62153-4-13 Edition 1.0 2009-08 INTERNATIONAL STANDARD Metallic communication cable test methods Part 4-13: Electromagnetic compatibility (EMC) Coupling attenuation of links and channels (laboratory conditions) Absorbing clamp method INTERNATIONAL ELECTROTECHNICAL COMMISSION
10、 P ICS 33.100; 33.120.10 PRICE CODE ISBN 2-8318-1055-8 Registered trademark of the International Electrotechnical Commission colour inside 2 62153-4-13 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
11、.2 Balun requirements .6 4.1.3 Extension cable requirements7 4.2 Test sample 8 4.2.1 General .8 4.2.2 Length of extension cables 8 4.2.3 Tested length 8 4.2.4 Preparation of test sample.8 4.3 Calibration procedure9 4.4 Test set-up9 4.4.1 General .9 4.4.2 Test set-up verification 10 4.5 Measuring pro
12、cedure.11 4.5.1 General .11 4.5.2 Example of link measurement11 5 Expression of test results .13 6 Test report14 6.1 General .14 6.2 Evaluation of test results .14 Figure 1 Measurement of surface wave at connecting hardware in one end of a link or channel.6 Figure 2 Termination of link or channel or
13、 applied extension cable.9 Figure 3 Test set-up for a near-end measurement of the first connecting hardware of a link or channel .10 Figure 4 Example of a four-connector link configuration as defined in ISO/IEC 1180112 Figure 5 First tested part of the link .12 Figure 6 Second tested part of the lin
14、k.13 Figure 7 Last tested part of the link13 Figure 8 Typical measurement of a screened channel15 Figure 9 Typical measurement of an unscreened balanced channel.15 Table 1 Balun performance characteristics.7 62153-4-13 IEC:2009(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ METALLIC COMMUNICATION
15、CABLE TEST METHODS Part 4-13: Electromagnetic compatibility (EMC) Coupling attenuation of links and channels (laboratory conditions) Absorbing clamp method FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrot
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24、gal 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 indispensable for the correct application of this pu
25、blication. 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. International Standard IEC 62153-4-13 has been prepared by IEC technical committ
26、ee 46: Cables, wires, waveguides, R.F. connectors, R.F. and microwave passive components and accessories. The text of this standard is based on the following documents: CDV Report on voting 46/313/CDV 46/329/RVC Full information on the voting for the approval of this standard can be found in the rep
27、ort on voting indicated in the above table. This publication is to be read in conjunction with IEC 62153-4-5 (2006). 4 62153-4-13 IEC:2009(E) This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the IEC 62153 series, under the general title: Met
28、allic communication cable test methods, can be found on the IEC website. The committee has decided that the contents of this publication 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
29、. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version 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
30、for the correct understanding of its contents. Users should therefore print this publication using a colour printer. 62153-4-13 IEC:2009(E) 5 METALLIC COMMUNICATION CABLE TEST METHODS Part 4-13: Electromagnetic compatibility (EMC) Coupling attenuation of links and channels (laboratory conditions) Ab
31、sorbing clamp method 1 Scope This part of IEC 62153 details the method of laboratory test to determine the coupling attenuation for links and channels used in analogue and digital communication systems. 2 Normative references The following referenced documents are indispensable for the application o
32、f this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-726, International Electrotechnical Vocabulary Chapter 726: Transmission lines and waveguides IEC 61196-1, Coaxia
33、l communication cables Part 1: Generic specification General, definitions and requirements IEC 62153-4-5:2006, Metallic communication cables test methods Part 4-5: Electromagnetic compatibility (EMC) Coupling or screening attenuation Absorbing clamp method ISO/IEC 11801, Information technology Gener
34、ic cabling for customer premises ITU-T Recommendation G.117:1996, Transmission aspects of unbalance about earth ITU-T Recommendation O.9:1999, Measuring arrangements to assess the degree of unbalance about earth 3 Terms and definitions For the purposes of this document, the terms and definitions giv
35、en in IEC 60050-726 and IEC 61196-1 apply. In this document, connecting hardware is defined as a complete connecting device including compensating or matching networks (if any), connectors and cable terminations. 4 Test method 4.1 Equipment 4.1.1 General See 5.1.1 of IEC 62153-4-5 and Figure 1 below
36、. 6 62153-4-13 IEC:2009(E) 600 cm 10 cm 5 0 11 2 6 8 3 10 12 4 9 1 14 7 13 IEC 1475/09 Key 0 signal generator, output impedance Z 01 link or channel under test, nominal characteristic impedance Z 12 outer circuit of the link or channel under test, impedance Z 23 absorbing clamp, impedance Z 34 measu
37、ring receiver 5 balun (if applicable) 6 current transformer 7 measuring receiver cable (use the same in measurement and calibration) 8 absorber (ferrite tube) of the clamp, insertion loss 10 dB 9 absorber (or second clamp), insertion loss 10 dB 10 termination of the far-end extension cable connected
38、 to link or channel under test 11 shield of signal generator and balun if needed for high dynamic range 12 reflector plate 13 extension cable connected through mating connector to link or channel under test, if applicable 14 connecting hardware in measured end of link or channel Figure 1 Measurement
39、 of surface wave at connecting hardware in one end of a link or channel 4.1.2 Balun requirements For measurement of symmetrical cable assemblies, a means for generating symmetrical signals shall be provided. If the generator is unbalanced, this may be performed by the use of a balun or 180 power spl
40、itter. The minimum requirements for this device are specified in Table 1. The attenuation of the balun shall be kept as low as possible because it will limit the dynamic range of the coupling attenuation or screening attenuation measurements. 62153-4-13 IEC:2009(E) 7 Table 1 Balun performance charac
41、teristics Parameter Value Impedance, primary a50 (unbalanced) Impedance, secondary b100 or 150 (balanced) Operational attenuation d(including matching pads if used) 10 dB Return loss, bi-directional 6 dB Power rating To accommodate the power of the generator and amplifier (if applicable) Output sign
42、al balance c 50 dB from 30 MHz to 100 MHz 30 dB from 100 MHz to the highest measured frequency a Primary impedance may differ if necessary to accommodate analyzer outputs other than 50 . bBalanced outputs of the test baluns shall be matched to the nominal impedance of the symmetrical patch cord / ca
43、ble pair. 100 shall be used for termination of 120 cabling. c Measured per ITU-T Recommendations G.117 and O.9. d The operational attenuation of a balun shall be mathematically deduced from 3 operational attenuation measurements with 3 baluns back-to-back. 4.1.3 Extension cable requirements An exten
44、sion cable is only required if the channel or link under test does not include a cable, which can be connected to the test set-up. Unscreened extension cables shall be used for testing unscreened, balanced link or channels. Screened, balanced extension cables shall be used for testing screened, bala
45、nced cable assemblies. Unbalanced (coaxial) extension cables shall be used for testing unbalanced cable assemblies. The electrical transmission performance including electromagnetic screening and unbalance attenuation of the extension cables shall be better or equal to the performance of the link or
46、 channel under test. The choice of the extension cable should assure the minimum insertion loss and reflection loss of the set-up possible. The extension cables shall have the same nominal characteristic impedance as the link or channel under test. Likewise, the velocity of propagation of the extens
47、ion cables shall correspond to the link or channel under test (same type of isolation e.g. foamed or solid). The insertion loss of a near-end extension cable including mating connector, if applicable, shall be less than 2,0 dB up to the highest measurement frequency. The insertion loss of set-up val
48、idation cable shall be less than the insertion loss of any cable included in the link or channel under test. The extension cables, any mating connectors and the connection between extension cables and the mating connectors, if applicable, shall have a balance or screening or balance and screening as
49、 good as possible. To further enhance the measurement sensitivity, the connection between the mating connector and the extension cable may be improved since it does not form part of the device under test. It is not allowed to improve any contact between the connecting hardware of the link or channel under test and the mating connector of the extension cable, if applicable. The measurement sensitivity shall be 6 dB better than the
