1、 IEC 62037-4 Edition 1.0 2012-07 INTERNATIONAL STANDARD NORME INTERNATIONALE Passive RF and microwave devices, intermodulation level measurement Part 4: Measurement of passive intermodulation in coaxial cables Dispositifs RF et micro-ondes passifs, mesure du niveau dintermodulation Partie 4: Mesure
2、de lintermodulation passive dans les cbles coaxiaux IEC 62037-4:2012-07(EN-FR) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2012 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, elect
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20、e devices, intermodulation level measurement Part 4: Measurement of passive intermodulation in coaxial cables Dispositifs RF et micro-ondes passifs, mesure du niveau dintermodulation Partie 4: Mesure de lintermodulation passive dans les cbles coaxiaux INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMIS
21、SION ELECTROTECHNIQUE INTERNATIONALE K ICS 33.040.20 PRICE CODE CODE PRIX ISBN 978-2-8322-1347-6 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorize
22、d distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 62037-4 IEC:2012 CONTENTS FOREWORD . 3 1 Scope . 5 2 Normative references . 5 3 Abbreviations . 5 4 Test fixtures . 5 5 Procedure. 7 5.1 General . 7 5.2 Dynamic test procedure Clamped ca
23、ble loop 8 5.3 Dynamic test Flexing tool . 8 5.4 Static test 9 Annex A (informative) General test considerations 10 Figure 1 Dynamic test using clamped “U“ bend in cable . 6 Figure 2 Dynamic test using flexing tool . 6 Table 1 Dimensions of the flexing tool 7 Table 2 Groove diameter . 7 62037-4 IEC:
24、2012 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ PASSIVE RF AND MICROWAVE DEVICES, INTERMODULATION LEVEL MEASUREMENT Part 4: Measurement of passive intermodulation in coaxial cables FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comp
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34、ormative references cited in this publication. Use of the referenced publications is indispensable 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 re
35、sponsible for identifying any or all such patent rights. International Standard IEC 62037-4 has been prepared by technical committee 46: Cables, wires, waveguides, R.F. connectors, R.F. and microwave passive components and accessories. This bilingual version (2014-01) corresponds to the monolingual
36、English version, published in 2012-07. The text of this standard is based on the following documents: FDIS Report on voting 46/418/FDIS 46/434/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. The French version of
37、 this standard has not been voted upon. 4 62037-4 IEC:2012 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all the parts in the IEC 62037 series, published under the general title Passive r.f. and microwave devices, intermodulation level measurement can
38、 be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability 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,
39、 withdrawn, replaced by a revised edition, or amended. 62037-4 IEC:2012 5 PASSIVE RF AND MICROWAVE DEVICES, INTERMODULATION LEVEL MEASUREMENT Part 4: Measurement of passive intermodulation in coaxial cables 1 Scope This part of IEC 62037 defines test fixtures and procedures recommended for measuring
40、 levels of passive intermodulation generated by coaxial cables. Two dynamic test methods and a static test method are defined. All coaxial cables are subjected to the static and clamped cable loop dynamic test. Cables classified as flexible or semi-flexible are additionally subjected to the flexing
41、tool dynamic test. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (
42、including any amendments) applies. IEC 62037-1, Passive r.f. and microwave devices, intermodulation level measurement Part 1: General requirements and measuring methods IEC 62037-3, Passive r.f. and microwave devices, intermodulation level measurement Part 3: Measurement or passive intermodulation i
43、n coaxial connectors 3 Abbreviations DUT Device under test IM Intermodulation 4 Test fixtures For the dynamic tests, appropriate test fixtures are required. For the clamped cable loop test (see 5.2), a method shall be provided for laterally moving the cable and for clamping the cable each side of th
44、e region of movement, as shown schematically in Figure 1. Design of the clamps shall be such as to firmly support the cable at the required points without causing damage to the cable by crushing or kinking. In the moving test using the flexing tool (see 5.3), the cable is flexed by a fixture through
45、 which the cable is threaded as shown in Figure 2. General design for the fixture is shown in Figure 2, and the detailed dimensions for different cable sizes (and different specified bend radii) are listed in Table 1 and Table 2. 6 62037-4 IEC:2012 Clamp R R Clamp To load To test set d3d3d1d1d2d2IEC
46、 1535/12 Figure 1 Dynamic test using clamped “U“ bend in cable Y X + D X R = D Clamps DUT Test port Z IEC 1536/12 Figure 2 Dynamic test using flexing tool 62037-4 IEC:2012 7 D is equal to or greater than the nominal diameter of the cable under test. Values X, Y and Z depend on minimum bend radius of
47、 the cable for repeated bending. Table 1 Dimensions of the flexing tool D diameter of the cable R_min Minimum bend radius of the cable for repeated bending X See Table 2 Y 2 R_min Z X + 2,5 cable diameter Table 2 Groove diameter Minimum bending radius of cable under test Groove diameter X mm R_min 3
48、3 mm 66 33 mm R_min 47 mm 94 47 mm R_min 68 mm 136 68 mm R_min 100 mm 200 Other values may be used if agreed upon by the customer and supplier or specified by the manufacturer. 5 Procedure 5.1 General The test method of IEC 62037-1 shall be used. Intermodulation in long cables is measured using the
49、reverse set-up because of the significant attenuation of these cables. If the cable to be measured is long enough, i.e. with a one-way insertion loss of 10 dB or greater, it is required only to connectorize the end to be tested. Use connectors with known low IM performance relative to the DUT. Soldered joints are preferred. Similarly, if a termination is required, this shall also be of kno
