1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationPassive RF and microwave devices, intermodulation level measurementPart 4: Measurement of passive intermodulation in coaxial cablesBS EN 62037-4:2012National forewordThis British
2、 Standard is the UK implementation of EN 62037-4:2012. It is identical to IEC 62037-4:2012. Together with BS EN 62037-1:2012, BS EN 62037-2:2013, BS EN 62037-3:2012, BS EN 62037-5:2013 and BS EN 62037-6:2013, it supersedes BS EN 62037:2000, which will be withdrawn on 15 July 2015.The UK participatio
3、n in its preparation was entrusted to Technical Committee EPL/46, Cables, wires and waveguides, radio frequency connectors and accessories for communication and signalling.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purp
4、ort to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2013.Published by BSI Standards Limited 2013.ISBN 978 0 580 58420 6 ICS 33.040.20Compliance with a British Standard cannot confer immunity from legal obliga
5、tions.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2013.Amendments issued since publicationDate Text affectedBRITISH STANDARDBS EN 62037-4:2012EUROPEAN STANDARD EN 62037-4 NORME EUROPENNE EUROPISCHE NORM September 2012 CENELEC Eur
6、opean Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for C
7、ENELEC members. Ref. No. EN 62037-4:2012 E ICS 33.040.20 Supersedes EN 62037:1999 (partially)English version Passive RF and microwave devices, intermodulation level measurement - Part 4: Measurement of passive intermodulation in coaxial cables (IEC 62037-4:2012) Dispositifs RF et micro-ondes passifs
8、, mesure du niveau dintermodulation - Partie 4: Mesure de lintermodulation passive dans les cbles coaxiaux (CEI 62037-4:2012) Passive HF- und Mikrowellenbauteile, Messung des Intermodulationspegels - Teil 4: Messung der passiven Intermodulation in koaxialen Kabeln (IEC 62037-4:2012) This European St
9、andard was approved by CENELEC on 2012-08-28. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references conce
10、rning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC me
11、mber into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Repub
12、lic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 62037-4:2012EN 62037-4:2012 Foreword The text of
13、 document 46/418/FDIS, future edition 1 of IEC 62037-4, prepared by 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 approved by CENELEC as EN 62037-4:2012. The following dates are fixed:
14、latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2013-05-28 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2015-08-28 This document supersedes EN 62
15、037:1999 (PART). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 62037-4
16、:2012 was approved by CENELEC as a European Standard without any modification. BS EN 62037-4:2012EN 62037-4:2012 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively refere
17、nced 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 (including any amendments) applies. NOTE When an international publication has been modified by common modifica
18、tions, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 62037-1 - Passive RF and microwave devices, intermodulation level measurement - Part 1: General requirements and measuring methods EN 62037-1 - IEC 62037-3 - Passive RF and microwave devices, intermodulation
19、 level measurement - Part 3: Measurement of passive intermodulation in coaxial connectors EN 62037-3 - BS EN 62037-4:201262037-4 IEC:2012(E) CONTENTS 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 cab
20、le 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 BS
21、EN 62037-4:201262037-4 IEC:2012(E) 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 levels of passive intermodulation ge
22、nerated 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 tool dynamic test. 2 Normative refere
23、nces 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 (including any amendments) applies. IE
24、C 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 in coaxial connectors 3 Abbreviations
25、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 the region of movement, as shown schema
26、tically 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 which the cable is threaded as shown
27、 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. BS EN 62037-4:2012 6 62037-4 IEC:2012(E) Clamp R RClamp To load To test set d3d3d1d1d2d2IEC 1535/12 Figure
28、1 Dynamic test using clamped “U“ bend in cable YX + D X R = D Clamps DUT Test port Z IEC 1536/12 Figure 2 Dynamic test using flexing tool BS EN 62037-4:201262037-4 IEC:2012(E) 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 radiu
29、s of 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_m
30、in 33 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
31、the 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. S
32、oldered joints are preferred. Similarly, if a termination is required, this shall also be of known low IM performance relative to the DUT. See IEC 62037-3 for additional information. Perform the required tests for the appropriate cable type as described in 5.2, 5.3 and 5.4. BS EN 62037-4:2012 8 6203
33、7-4 IEC:2012(E) 5.2 Dynamic test procedure Clamped cable loop The procedure is as follows: a) Connect the cable to be tested to the IM test set, and to the low IM termination if used (for short cables) as shown in Figure 1. Bend the cable into a “U“ shape and position clamps on the limbs of the “U“
34、as shown. b) Adjust the radius of the “U“ bend and the positions of the clamps so that dimensions “R“ are at the minimum bend radius for the cable under test. Then firmly clamp the cable on both sides of the movement region, so that mechanical stresses resulting from cable movement are not transmitt
35、ed to the test set or load connections, possibly creating high IM conditions. c) The test described in item b) shall also be conducted on another sample, except done at the multiple bend radius. Prior to conducting the test, the cable shall be subjected to multiple bends. d) Record the level of pass
36、ive intermodulation generated in the static condition. e) Apply movement to the cable in each of three directions, d1, d2, d3, as shown in Figure 1. The movement may be applied by hand, or by suitable mechanical means. If mechanical means is used, this shall cause no damage to the cable (e.g. by kin
37、king or crushing) at the point of application or elsewhere. The amplitude of movement in each direction for the cable size under test shall be a minimum of 20 mm. The amplitude may be of a higher value if specified. A minimum of 3 cycles (movement in both directions) per axis shall be performed; eac
38、h cycle shall be between 1 s and 5 s duration. f) Record the maximum level of passive intermodulation generated during movement. NOTE If using a spectrum analyser, it is helpful to use the “max-hold” function. g) Finally, record the level of passive intermodulation generated in the static condition
39、after movement has ceased. 5.3 Dynamic test Flexing tool The procedure is as follows: a) Thread the cable to be tested through the flexing tool, and connect the ends to the IM test set, and to the low IM termination if used (for short cables) as shown in Figure 2. Fasten clamps at the ends of the ca
40、ble length, so that mechanical stresses resulting from cable movement are not transmitted to the test set or load connections, possibly creating high IM conditions. b) Record the level of passive intermodulation generated in the static condition. c) Move the flexing tool along the length of the cabl
41、e, so that the cable is flexed along the whole test length as it passes the wheels of the tool. Care shall be taken that mechanical strains are not transmitted to the test set or the terminating load (if used). Rotate the fixture 90 about the axis of the cable length (to test the orthogonal plane) a
42、nd move the flexing tool back along the length of the cable. d) Record the maximum level of passive intermodulation generated during movement and the length of the cable that the test was performed on. NOTE If using a spectrum analyser, it is helpful to use the “max-hold” function to record the maxi
43、mum level of passive intermodulation. e) Finally, record the level of passive intermodulation generated in the static condition after movement has ceased. BS EN 62037-4:201262037-4 IEC:2012(E) 9 5.4 Static test The procedure is as follows: a) Connect the cable to be tested to the test equipment. For
44、 large diameter feeder cables (16 mm nominal diameter and larger) with high inherent stiffness, the cable under test should be connected to the IM test equipment via a short flexible jumper cable of known and suitably low IM performance. b) Record the level of passive intermodulation generated. BS E
45、N 62037-4:2012 10 62037-4 IEC:2012(E) Annex A (informative) General test considerations For flexible and semi flexible cables, dynamic tests involve lateral cable movement (bending and flexing), and are suitable for initial cable qualification of smaller cables (up to 16 mm in diameter), and cables
46、designed for use in jumper applications (which may be up to 28 mm in diameter over the cable sheath). One dynamic test involves moving a clamped cable loop in different directions, and is suitable for rapidly testing stability against flexure in different planes. In the second dynamic test, the cabl
47、e is flexed through a set of wheels, which allows for a greater length of cable to be tested, but just in a single plane per traverse. This test using the flexing tool is suitable for use with cables up to 18 mm in diameter. _ BS EN 62037-4:2012This page deliberately left blankBSI is the independent
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