1、 IEC/TR 61156-1-5 Edition 1.0 2013-06 TECHNICAL REPORT Multicore and symmetrical pair/quad cables for digital communications Part 1-5:Correction procedures for the measurement results of return loss and input impedance IEC/TR 61156-1-5:2013(E)colourinsideCopyrighted material licensed to BR Demo by T
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10、ermitted.Uncontrolled when printed.IEC/TR 61156-1-5 Edition 1.0 2013-06 TECHNICAL REPORT Multicore and symmetrical pair/quad cables for digital communications Part 1-5:Correction procedures for the measurement results of return loss and input impedance INTERNATIONAL ELECTROTECHNICAL COMMISSION S ICS
11、 33.120.20 PRICE CODE ISBN 978-2-83220-918-9 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinsideCopyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded o
12、n Nov-27-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.2 TR 61156-1-5 IEC:2013(E)CONTENTS FOREWORD.3 1 Scope.5 2 Normative references.5 3 Acronyms.5 4 Return loss measurements.6 4.1 General.6 4.2 Return loss(RL).6 4.3 Open/short return loss(OSRL
13、).7 4.4 Structural return loss(SRL).7 5 Correction procedures.8 5.1 General.8 5.2 Parasitic inductance corrected return loss(PRL).9 5.3 Gated return loss(GRL).10 5.4 Fitted return loss(FRL).12 Annex A(informative)Comparison of gated return loss(GRL)with fitted return loss(FRL).18 Annex B(informative
14、)Influence of the correction technique on return loss peaks.20 Figure 1 Return loss with and without junction reflections.6 Figure 2 Return loss and open/short return loss.7 Figure 3 Return loss,open short return loss and structural return loss.8 Figure 4 Input impedance(magnitude)and operational re
15、turn loss up to 2 GHz.9 Figure 5 Equivalent circuit for the corrective calculation.9 Figure 6 Return loss with gating correction.12 Figure 7 Return loss and input impedance before any correction.15 Figure 8 Return loss and input impedance(with fitting)after fixture correction.15 Figure 9 Residual im
16、pedance(after fixture correction)and its fitting.16 Figure 10 Return loss and input impedance after complete correction.16 Figure 11 Return loss,with fixture correction vs.without fixture correction.17 Figure 12 Input impedance(real and imaginary part),with fixture correction vs.without fixture correction.17 Figure A.1 Return loss,fitting vs.gating correction.18 Figure A.2 Real part of input impedance,fitting vs.gating correction.18 Figure A.3 Imaginary part of input impedance,fitting vs.gati