Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 BSI Standards Publication Connectors for electronic equipment — Part 7-2: Detail specification for 8-way, unshielded, free and fixed connectors, for data transmissions with frequencies up to 100 MHz NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW raising standards worldwide™ Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BRITISH STANDARD BS EN 60603-7-2:2009 National foreword This British Standard is the UK implementation of EN 60603-7-2:2009 It is identical to IEC 60603-7-2:2007 The UK participation in its preparation was entrusted to Technical Committee EPL/48, Electromechanical components and mechanical structures for electronic equipment A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © BSI 2010 ISBN 978 580 53763 ICS 31.220.10 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2010 Amendments issued since publication Amd No Date 标准分享网 www.bzfxw.com 免费下载 Text affected Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 EUROPEAN STANDARD EN 60603-7-2 NORME EUROPÉENNE EUROPÄISCHE NORM November 2009 ICS 31.220.10 English version Connectors for electronic equipment Part 7-2: Detail specification for 8-way, unshielded, free and fixed connectors, for data transmissions with frequencies up to 100 MHz (IEC 60603-7-2:2007) Connecteurs pour équipements électroniques Partie 7-2: Spécification particulière pour les fiches et les embases non blindées voies pour la transmission de données des fréquences jusqu'à 100 MHz (CEI 60603-7-2:2007) Steckverbinder für elektronische Einrichtungen Teil 7-2: Bauartspezifikation für ungeschirmte freie und feste Steckverbinder, 8polig, für Datenübertragungen bis 100 MHz (IEC 60603-7-2:2007) ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ This European Standard was approved by CENELEC on 2009-09-01 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 concerning such national standards may be obtained on application to the Central Secretariat 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 member into its own language and notified to the Central Secretariat has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: Avenue Marnix 17, B - 1000 Brussels © 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 60603-7-2:2009 E Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 EN 60603-7-2:2009 –2– Foreword The text of document 48B/1740/FDIS, future edition of IEC 60603-7-2, prepared by SC 48B, Connectors, of IEC TC 48, Electromechanical components and mechanical structures for electronic equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60603-7-2 on 2009-09-01 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) 2010-06-01 – latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2012-09-01 Annex ZA has been added by CENELEC Endorsement notice The text of the International Standard IEC 60603-7-2:2007 was approved by CENELEC as a European Standard without any modification ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 标准分享网 www.bzfxw.com 免费下载 Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 –3– EN 60603-7-2:2009 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the application of this document 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 modifications, indicated by (mod), the relevant EN/HD applies Publication Year Title EN/HD Year - - Communication cables - Specifications for test methods Part 1-14: Electrical test methods - Coupling attenuation or screening attenuation of connecting hardware EN 50289-1-14 - IEC 60050-581 - 1) International Electrotechnical Vocabulary (IEV) Part 581: Electromechanical components for electronic equipment - IEC 60068-1 - 1) Environmental testing Part 1: General and guidance EN 60068-1 1994 IEC 60068-2-38 - 1) Environmental testing Part 2-38: Tests - Test Z/AD: Composite temperature/humidity cyclic test EN 60068-2-38 2009 - 1) Radio-frequency connectors Part 16: R.F coaxial connectors with inner diameter of outer conductor mm (0,276 in) with screw coupling - Characteristic impedance 50 ohms (75 ohms) (type N) - - IEC 60169-16 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 1) 2) IEC 60352 Series Solderless connections EN 60352 Series IEC 60512 Series Connectors for electronic equipment - Tests and measurements EN 60512 Series IEC 60512-1-100 - 1) Connectors for electronic equipment - Tests EN 60512-1-100 and measurements Part 1-100: General - Applicable publications 2006 2) IEC 60603-1 - 1) Connectors for frequencies below MHz for EN 60603-1 use with printed boards Part 1: Generic specification - General requirements and guide for the preparation of detail specifications, with assessed quality 1998 2) IEC 60603-7 EN 60603-7 Series Connectors for electronic equipment Part 7: Detail specifications for 8-way free and fixed connectors IEC 60664-1 - 1) 2) 1) Undated reference Valid edition at date of issue Insulation coordination for equipment within low-voltage systems Part 1: Principles, requirements and tests EN 60664-1 Series 2007 2) Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 EN 60603-7-2:2009 –4– Year Publication 1) Title EN/HD Year Connectors for electronic equipment Product requirements Part 1: Generic specification EN 61076-1 2006 IEC 61076-1 - IEC 61156 Series Multicore and symmetrical pair/quad cables for digital communications - - ISO/IEC 11801 2002 Information technology - Generic cabling for customer premises - - ISO 1302 - 1) Geometrical Product Specifications (GPS) Indication of surface texture in technical product documentation EN ISO 1302 2002 ITU-T Recommendation K.20 - 1) Resistibility of telecommunication equipment installed in a telecommunications centre to overvoltages and overcurrents - ITU-T Recommendation K.44 - 1) Resistibility tests for telecommunication equipment exposed to overvoltages and overcurrents - Basic Recommendation - - ITU-T Recommendation G.117 - 1) Transmission aspects of unbalance about earth - - ITU-T Recommendation O.9 - 1) Measuring arrangements to assess the degree of unbalance about earth - - ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 标准分享网 www.bzfxw.com 免费下载 2) 2) Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 60603-7-2 © IEC:2007 –3– CONTENTS FOREWORD INTRODUCTION 13 General 15 1.1 Scope 15 1.2 Normative references 15 IEC type designation 19 2.1 Terms and definitions 21 Common features and isometric view 23 3.1 Isometric view 23 3.2 Mating information 23 Cable terminations and internal connections – fixed and free connectors 39 4.1 General 39 4.2 Termination types 39 Gauges 41 5.1 Fixed connectors 41 5.2 Free connectors 47 Characteristics 51 6.1 General 51 6.2 Pin and pair grouping assignment 51 6.3 Classification into climatic category 51 6.4 Electrical characteristics 53 6.5 Transmission characteristics 57 6.6 Mechanical 61 Tests and test schedule 61 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 7.1 7.2 7.3 7.4 7.5 7.6 7.7 General 61 Arrangement for contact resistance test: 63 Arrangement for vibration test (test phase CP1) 65 Test procedures and measuring methods 65 Preconditioning 65 Wiring and mounting of specimens 67 Test schedules 67 Annex A (normative) Gauging continuity procedure 85 Annex B (normative) Locking-device mechanical operation 93 Annex C (normative) Test plug requirements 95 Annex D (normative) General requirements for the measurement set-up 123 Annex E (normative) Insertion loss 135 Annex F (normative) Return loss 139 Annex G (normative) Near end cross talk (NEXT) 143 Annex H (normative) Far end cross talk 147 Annex I (normative) Termination of balun 151 Annex J (normative) Gauge requirements 153 Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 60603-7-2 © IEC:2007 –5– Figure – Isometric view 23 Figure – Contact interface dimensions with terminated free connector 25 Figure – Fixed connector details 31 Figure – Free connector view 35 Figure – “Go” gauge 41 Figure – No-go gauges 43 Figure – “No-go” gauges 47 Figure – “Go” gauge 49 Figure – Fixed connector pin and pair grouping assignment (front view of connector) 51 Figure 10 – Connector de-rating curve 55 Figure 11 – Arrangement for contact resistance test 63 Figure 12 – Arrangement for vibration test 65 Figure A.1 – Gauge 89 Figure A.2 – Gauge insertion 91 Figure C.1 – De-embedding reference plug 97 Figure C.2 – De-embedding reference jack 101 Figure C.3 – THI3KIT test head interface with baluns attached 113 Figure C.4 – Alternative to item 3.1 in Table C.5 117 Figure C.5 – Back-to-back through calibration 117 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Figure C.6 – Mated test plug/coaxial termination reference test head test configuration 121 Figure D.1 – 180° hybrid used as a balun 125 Figure D.2 – Calibration of reference loads 127 Figure D.3 – Resistor load 129 Figure D.4 – Screened pyramid 131 Figure D.5 – Definition of reference planes 133 Figure E.1 – Calibration 135 Figure E.2 – Measuring Set-up 137 Figure G.1 – NEXT measurement for differential and common mode terminations 143 Figure H.1 – FEXT measurement differential and common mode terminations 147 Figure I.1 – Balanced attenuator for balun centre tap grounded 151 Figure I.2 – Balanced attenuator for balun centre tap open 151 Table – Dimensions for Figure 27 Table – Dimensions for Figure 33 Table – Dimensions for Figure 37 Table – Dimensions for Figures and 45 Table – Dimensions for Figure 47 Table – Dimensions for Figure 49 标准分享网 www.bzfxw.com 免费下载 Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 60603-7-2 © IEC:2007 –7– Table – Climatic categories – selected values 51 Table – Creepage and clearance distances 53 Table – Test group P 69 Table 10 – Test group AP 71 Table 11 – Test group BP 75 Table 12 – Test group CP 77 Table 13 – Test group DP 79 Table 14 – Test group EP 81 Table 15 – Test group FP 83 Table 16 – Test group GP 83 Table A.1 – Dimensions for Figure A.1 87 Table C.1 – De-embedded real and imaginary reference jack vectors 105 Table C.2 – Test plug NEXT loss limits 107 Table C.3 – Test plug NEXT loss ranges 109 Table C.4 – Coaxial termination reference head component list 111 Table C.5 – Coaxial termination reference head, additional parts 115 Table C.6 – Return loss requirements for return loss reference plug 121 Table D.1 – Test balun performance characteristics 127 Table F.1 – Uncertainty band of return loss measurement at frequencies below 100 MHz 141 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Table F.2 – Uncertainty band of return loss measurement at frequencies above 100 MHz 141 Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 60603-7-2 © IEC:2007 –9– INTERNATIONAL ELECTROTECHNICAL COMMISSION CONNECTORS FOR ELECTRONIC EQUIPMENT – Part 7-2: Detail specification for 8-way, unshielded, free and fixed connectors, for data transmissions with frequencies up to 100 MHz 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 electronic fields To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”) Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work International, governmental and nongovernmental organizations liaising with the IEC also participate in this preparation IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication 6) All users should ensure that they have the latest edition of this publication 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal 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 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 responsible for identifying any or all such patent rights International Standard IEC 60603-7-2 has been prepared by subcommittee 48B: Connectors, of IEC technical committee 48: Electromechanical components and mechanical structures for electronic equipment The text of this standard is based on the following documents: FDIS Report on voting 48B/1740/FDIS 48B/1748/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 This publication has been drafted in accordance with the ISO/IEC Directives, Part 标准分享网 www.bzfxw.com 免费下载 Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 60603-7-2 © IEC:2007 – 131 – where R dif is the differential mode impedance (Ω); R com is the common mode impedance (Ω) The two resistors R shall be matched to within 0,5 % The termination shall be implemented at a small printed circuit board with surface mount resistors The layout for the resistors R shall be symmetrical The common-mode termination points for all pairs shall be connected to the ground plane D.7 Termination of screens If the connector under test is screened, screened measurement cables shall be applied The screen or screens of these cables shall be fixed to the ground plane as close as possible to the measurement baluns If a pyramid test setup is used, the screen of each pair shall be contacted to the grooves of the pyramid (Figure D.4) and guided as close as possible to the baluns on the mounting plate ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ IEC 245/07 Figure D.4 – Screened pyramid Care shall be taken to maintain a tight fit of the individual pair foil, if present, around the twisted pairs D.8 Test specimen and reference planes The test specimen is a mated pair of relevant connectors The electrical reference plane for the test specimen is the point at which the cable sheath enters the connector (the back end of the connector) or the point at which the internal geometry of the cable is no longer maintained, whichever is farther from the connector (see Figure D.5) This definition applies to both ends of the test specimen 标准分享网 www.bzfxw.com 免费下载 Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 60603-7-2 © IEC:2007 – 133 – Plug side Socket side Connector reference planes IEC 120/05 Figure D.5 – Definition of reference planes ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 60603-7-2 © IEC:2007 – 135 – Annex E (normative) Insertion loss E.1 Object The object of this test is to measure the insertion loss, which is defined as the additional attenuation that is provided by a pair of mated connectors inserted in a communication cable E.2 Test method Insertion loss (RL) is evaluated by measuring the scattering parameters, S 21 , of all the conductor pairs E.3 Tests set up The test set-up consists of a network analyser and two baluns as defined in Annex D It is not necessary to terminate the unused pairs E.4 E.4.1 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Procedure Calibration A full 2-port calibration shall be performed at the reference plane This is performed by applying a maximum length of 14 cm reference cable between the terminals of the baluns and carrying out the transmission calibration measurement Then a maximum length of cm reference cables are connected to the terminals of the two baluns (see Figure E.1) The total length of these cables shall be equal to the length of the reference cable used for transmission calibrations At the end of these reference cables, the reflection calibrations are performed by applying open, short and load terminations Transmission calibrations Balun NA Port Balun NA Port Reference cable Reflection calibrations Balun Balun NA Port NA Port Open, short and load terminations Figure E.1 – Calibration ————————— Often referred to as attenuation 标准分享网 www.bzfxw.com 免费下载 IEC 246/07 Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 60603-7-2 © IEC:2007 E.4.2 – 137 – Measurement The test specimen shall be terminated with measurement cables at both ends, see Figure E.2 The length of measurement cables shall be equal to the length of the reference cables used for reflection calibrations The measurement cables shall be the cable types for which the connector is intended An S 21 measurement shall be performed CUT 50 Ω 50 Ω NA Port NA Port ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Measurement cables Screen (if any) Ground plane Socket side Plug side IEC 247/07 Figure E.2 – Measuring Set-up E.5 Test report The measured results shall be reported in graphical or table format with the specification limits shown on the graphs or in the table at the same frequencies as specified in the relevant detail specification Results for all pairs shall be reported It shall be explicitly noted if the measured results exceed the test limits E.6 Accuracy The accuracy shall be within ±0,05 dB Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 60603-7-2 © IEC:2007 – 139 – Annex F (normative) Return loss F.1 Object The object of this test is to measure the return loss of a mated connector pair at the two reference planes F.2 Test method Return loss (RL) is measured by measuring the scattering parameters, S 11 and S 22 , of all the conductor pairs NOTE As a connector is a low-loss device, the return loss of the two sides is nearly equal F.3 Test set-up The test set-up is as described in Annex D F.4 F.4.1 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Procedure Calibration Calibration shall be performed as described in E.4.1 F.4.2 Measurement The test specimen shall be terminated with measurement cables at both ends The length of measurement cables shall be equal to the length of the reference cables used for reflection calibrations The measurement cables shall be the cable types for which the connector is intended S 11 and S 22 measurements shall be carried out for each of the pairs F.5 Test report The measured results shall be reported in graphical or table format with the specification limits shown on the graphs or in the table at the same frequencies as specified in the relevant detail specification Results for all pairs shall be reported It shall be explicitly noted if the measured results exceed the test limits 标准分享网 www.bzfxw.com 免费下载 Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 60603-7-2 © IEC:2007 F.6 – 141 – Accuracy The return loss of the load for calibration is verified to be greater than 46 dB up to 100 MHz and greater than 40 dB at higher frequencies The uncertainty of the connection between the connector under test and the baluns is expected to deteriorate the return loss of the set-up (effectively the directional bridge implemented by the test set-up) by dB The accuracy of the return loss measurements is then equivalent to measurements performed by a directional bridge with a directivity of 40 dB and 34 dB The accuracy (uncertainty band) is given in Tables F.1 and F.2 Table F.1 – Uncertainty band of return loss measurement at frequencies below 100 MHz Measured RL 10 12 15 18 20 22 25 28 30 Lower uncertainty limit –0,3 –0,3 –0,5 –0,7 –0,8 –1,0 –1,4 –1,9 –2,4 Higher uncertainty limit +0,3 +0,4 +0,5 +0,7 +0,9 +1,2 +1,7 +2,5 +3,3 Table F.2 – Uncertainty band of return loss measurement at frequencies above 100 MHz Measured RL 10 12 15 18 20 22 25 28 30 Lower uncertainty limit –0,5 –0,7 –0,9 –1,3 –1,6 –1,9 –2,6 –3,5 –4,2 Higher uncertainty limit +0,6 +0,7 +1,0 +1,3 +1,9 +2,5 +3,8 +6,0 +8,7 EXAMPLE Let the measured RL be 20 dB The true RL then lies in the band of 18,4 dB to 21,9 dB at frequencies above 100 MHz ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 60603-7-2 © IEC:2007 – 143 – Annex G (normative) Near end cross talk (NEXT) G.1 Object The object of this test procedure is to measure the magnitude of the electric and magnetic coupling between driven (disturbing) and quiet (disturbed) pairs of a mated connector pair G.2 Test method Near-end crosstalk is evaluated by measuring the scattering parameters, S 21 , of the possible conductor pair combinations at one end of the mated connector, while the other end of the pairs are terminated G.3 Test set-up The test set-up consists of two baluns and a network analyser as defined in Annex D An illustration of the set-up, which also shows the termination principles, is shown in Figure G.1 CUT ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 50 Ω 50 Ω NA Port 25 Ω 50 Ω 50 Ω 50 Ω NA Port 50 Ω 25 Ω 50 Ω 50 Ω 50 Ω 25 Ω 50 Ω 50 Ω 50 Ω 50 Ω 25 Ω 50 Ω Measurement cables Screen (if any) Ground plane Plug side NOTE Socket side IEC 248/07 Passive terminations may be either balun or resistor terminations Figure G.1 – NEXT measurement for differential and common mode terminations 标准分享网 www.bzfxw.com 免费下载 Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 60603-7-2 © IEC:2007 G.4 G.4.1 – 145 – Procedure Calibration A through calibration shall be applied as a minimum Full 2-port calibration is recommended in order to enhance the measurement accuracy G.4.2 Establishment of noise floor The noise floor of the set-up shall be measured The level of the noise floor is determined by white noise, which may be reduced by increasing the test power and by reducing the bandwidth of the network analyser, and by residual crosstalk between the test baluns The noise floor shall be measured by terminating the baluns with resistors and performing an S 21 measurement The noise floor shall be 20 dB lower than any specified limit for the crosstalk If the measured value is closer to the noise floor than 10 dB, this shall be reported NOTE G.4.3 For high crosstalk values, it may be necessary to screen the terminating resistors Measurement Connect the disturbing pair of the Connector Under Test (CUT) to the signal source and the disturbed pair to the receiver port The CUT shall be tested with differential and common mode terminations Differential and common mode terminations shall be provided on at least one end of each pair, including the unused pairs This may be the near end or the far end Differential terminations shall be provided at both ends Optionally, differential and commonmode terminations may be provided at both ends of all pairs, as shown in Figure G.1 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ The measurements shall be performed from both ends of the mated connector As a connector is a low-loss device, near-end crosstalk values from two ends are nearly equal It is recommended that the socket be terminated with short separated pairs without a jacket Test all possible pair combinations and record the results G.5 Test report The results measured shall be reported in graphical or table format with the specification limits shown on the graphs or in the table at the same frequencies as specified in the relevant detail specification Results for all pairs shall be reported It shall be explicitly noted if the measured results exceed the test limits G.6 Accuracy The accuracy shall be better than ±1 dB at measurements up to 60 dB and ±2 dB at measurements up to 85 dB ————————— There are different combinations of near-end crosstalk in a 4-pair connector from each side, which gives a total of 12 measurements for each kind of termination method Because of reciprocity, only unique nonreciprocal combinations from each side need to be tested Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 60603-7-2 © IEC:2007 – 147 – Annex H (normative) Far end cross talk H.1 Object The object of this test procedure is to measure the magnitude of the electric and magnetic coupling between driven (disturbing) and quiet (disturbed) pairs of a mated connector pair H.2 Test method Far end crosstalk is evaluated by measuring the scattering parameters, S 21 , of the possible conductor pair combinations at one end of the mated connector, to the other end H.3 Test set-up The test set-up consists of two baluns and a network analyser as defined in Annex D A figure of the set-up, which also shows the termination principles, is shown in Figure H.1 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ CUT 50 Ω 50 Ω NA Port 50 Ω 50 Ω 25 Ω 50 Ω 50 Ω NA Port 50 Ω 50 Ω 50 Ω 25 Ω 50 Ω 50 Ω 50 Ω 50 Ω 25 Ω 50 Ω Measurement cables Screen (if any) Ground plane Socket side Plug side NOTE IEC 249/07 Passive terminations may be either balun or resistor terminations Figure H.1 – FEXT measurement differential and common mode terminations 标准分享网 www.bzfxw.com 免费下载 Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 60603-7-2 © IEC:2007 H.4 H.4.1 – 149 – Procedure Calibration Calibration is performed as shown in G.4.1 H.4.2 Establishment of noise floor The noise floor of the set up is established as shown in G.4.2 H.4.3 Measurement Connect the disturbing pair of the CUT to the signal source and the disturbed pair to the receiver port The CUT shall be tested with differential and common mode terminations Differential and common-mode terminations shall be provided on at least one end of each pair, including the unused pairs This may be the near or the far end Differential terminations shall be provided at both ends Optionally, differential and common-mode pairs may be provided at both ends of all pairs, as shown in Figure H.1 It is recommended that the socket be terminated with short separated pairs without jacket Test all possible pair combinations and record the results H.5 Test report The measured results shall be reported in graphical or table format with the specification limits shown on the graphs or in the table at the same frequencies as specified in the relevant detail specification Results for all pairs shall be reported It shall be explicitly noted if the measured results exceed the test limits ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ H.6 Accuracy The accuracy shall be better than ±1 dB at measurements up to 60 dB and ±2 dB at measurements up to 85 dB ————————— There are 12 different combinations for far-end crosstalk in a 4-pair connector, which gives a total of 12 measurements for each termination method Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 60603-7-2 © IEC:2007 – 151 – Annex I (normative) Termination of balun I.1 Termination of balun with low return loss for common mode I.1.1 General If the available balun does not provide a common-mode termination (centre tap is either connected to ground or open), a balanced resistor attenuator shall be applied in order to provide the required return loss The attenuator shall be implemented at a small printed circuit board mounted with SMD resistors There are two cases: one for the centre tap connected to ground and one for the centre tap open I.1.2 Centre tap connected to ground A diagram of the attenuator is shown in Figure I.1 The nominal attenuation is 10 dB and the calculated common mode impedance is 26 Ω R1 R1 R2 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ R1 R1 IEC 127/05 where: R = 26 Ω; R = 70 Ω Figure I.1 – Balanced attenuator for balun centre tap grounded I.1.3 Centre tap open A diagram of the attenuator is shown in Figure I.2 The nominal attenuation is dB and the calculated common mode impedance is 48 Ω R3 R3 R4 R4 R3 R3 IEC 128/05 where: R = 14 Ω; R = 82 Ω Figure I.2 – Balanced attenuator for balun centre tap open NOTE Resistor values are nominal The nearest standard values may be chosen 标准分享网 www.bzfxw.com 免费下载 Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI BS EN 60603-7-2:2009 60603-7-2 © IEC:2007 – 153 – Annex J (normative) Gauge requirements J.1 Fixed connectors The go gauge specified in 5.1 shall be capable of being inserted and removed with a force of 8,9 N maximum The no-go gauges specified in 5.1 shall not be capable of entering the fixed connector more than 1,78 mm (0,070 in) with an 8,9 N insertion force J.2 Free connectors The connector shall be capable of insertion and latching into the go gauge specified in 5.2 with a 20 N or less insertion force with the latch bar depressed After insertion and latching, the connector shall be capable of removal, with the latch depressed, with a removal force of 20 N or less applied at an advantageous angle ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ The free connectors shall not be capable of entering the no-go gauges specified in 5.2 more than 1,78 mm (0,070 in) with an 8,9 N insertion force _ Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ This page deliberately left blank 标准分享网 www.bzfxw.com 免费下载 Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ This page deliberately left blank Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 24/01/2010 03:46, (c) BSI British Standards Institution (BSI) BSI is the independent national body responsible for preparing British Standards and other standards-related publications, information and services It presents the UK view on standards in Europe and at the international level It is 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