This part of IEC 62153 deals with the triaxial tube in tube method. This triaxial method is suitable to determine the surface transfer impedance and\/or screening attenuation and coupling attenuation of mated screened connectors (including the connection between cable and connector) and cable assemblies. This method could also be extended to determine the transfer impedance, coupling or screening attenuation of balanced or multipin connectors and multicore cable assemblies. For the measurement of transfer impedance and screening- or coupling attenuation, only one test set-up is needed.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | Annex ZA (normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 3 Terms and definitions Figures Figure 1 \u2013 Definition of ZT <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 4 Physical background 5 Principle of the test methods 5.1 General Tables Table 1 \u2013 IEC 62153, Metallic communication cable test methods \u2013Test procedures with triaxial test set-up <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 5.2 Transfer impedance 5.3 Screening attenuation Figure 2 \u2013 Principle of the test set-up to measure transfer impedanceand screening or coupling attenuation of connectors with tube in tube <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 5.4 Coupling attenuation <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 6 Test procedure 6.1 General 6.2 Tube in tube procedure Figure 3 \u2013 Principle of the test set-up to measure transfer impedanceand screening attenuation of a cable assembly <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 6.3 Test equipment 6.4 Calibration procedure <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 6.5 Connection between extension tube and device under test 6.6 Dynamic range respectively noise floor <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 6.7 Impedance matching 6.8 Influence of adapters Figure 4 \u2013 Principle set-up for verification test <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 7 Sample preparation 7.1 Coaxial connector or device 7.2 Balanced or multiconductor device <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 7.3 Cable assembly 8 Measurement of transfer impedance 8.1 General 8.2 Principle block diagram of transfer impedance Figure 5 \u2013 Preparation of balanced or multiconductor connectors <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 8.3 Measuring procedure \u2013 Influence of connecting cables 8.4 Measuring 8.5 Evaluation of test results Figure 6 \u2013 Test set-up (principle) for transfer impedance measurementaccording to test of IEC 6215343 with load resistor in inner circuitand without damping resistor in outer circuit <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 8.6 Test report 9 Screening attenuation 9.1 General 9.2 Impedance matching 9.2.1 General <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 9.2.2 Evaluation of test results with matched conditions Figure 7 \u2013 Measuring the screening attenuation with tube in tubewith impedance matching device <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 9.2.3 Measuring with mismatch 9.2.4 Evaluation of test results 9.3 Test report <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 10 Coupling attenuation 10.1 General 10.2 Procedure for testing connectors Figure 8 \u2013 Coupling attenuation, principle test set-up with 2-port VNA and balun <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 10.3 Procedure for testing cable assemblies Figure 9 \u2013 Coupling attenuation, principle set-up with multiport VNAand TP\u2011connecting unit Figure 10 \u2013 Coupling attenuation, principle test set-up with multiport VNA and TP\u2011connecting unit for measuring complete cable assemblies <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 10.4 Evaluation of test results when using a balun 10.5 Evaluation of test results when using a multiport VNA Figure 11 \u2013 Coupling attenuation, principle test set-up with multiport VNAand TP\u2011connecting unit for measuring halved cable assemblies <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | 10.6 Test report Figure 12 \u2013 Typical measurement of a connector of 0,04 m lengthwith 1 m extension tube <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Annexes Annex A (normative) Determination of the impedance of the inner circuit <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Annex B (informative) Example of a self-made impedance matching adapter Figure B.1 \u2013 Attenuation and return loss of a 50 \u2126 to 5 \u2126 impedance matching adapter, log scale <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Figure B.2 \u2013 Attenuation and return loss of a 50 \u2126 to 5 \u2126 impedance matching adapter, lin scale <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | Annex C (informative) Measurements of the screening effectiveness of connectors and cable assemblies C.1 General C.2 Physical basics C.2.1 General coupling equation <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | Figure C.1 \u2013 Equivalent circuit of coupled transmission lines <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | C.2.2 Coupling transfer function Figure C.2 \u2013 Summing function S <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | Figure C.3 \u2013 Calculated coupling transfer function (l = 1 m; er1 = 2,3; er2 = 1; ZF = 0) <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | C.3 Triaxial test set-up C.3.1 General Figure C.4 \u2013 Triaxial set-up for the measurement of the screening attenuation aS and the transfer impedance ZT <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | C.3.2 Measurement of cable assemblies <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | C.3.3 Measurement of connectors Figure C.5 \u2013 Simulation of a cable assembly (logarithmic scale) Figure C.6 \u2013 Simulation of a cable assembly (linear scale) <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | Figure C.7 \u2013 Triaxial set-up with extension tube for short cable assemblies Figure C.8 \u2013 Triaxial set-up with extension tube for connectors <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | Figure C.9 \u2013 Simulation,logarithmic frequency scale Figure C.10 \u2013 Measurement,logarithmic frequency scale Figure C.11 \u2013 Simulation,linear frequency scale Figure C.12 \u2013 Measurement,linear frequency scale <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | C.4 Conclusion Figure C.13 \u2013 Simulation,logarithmic frequency scale Figure C.14 \u2013 simulation,linear frequency scale <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | Annex D (informative) Influence of contact resistances Figure D.1 \u2013 Contact resistances of the test set-up Figure D.2 \u2013 Equivalent circuit of the test set-up <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | Annex E (informative) Direct measurement of screening effectiveness of connectors E.1 Scope E.2 Test set-up Figure E.1 \u2013 Principle of the test set-up to measure transfer impedance and screening attenuation of a connector <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | E.3 Construction details of test set-up Figure E.2 \u2013 Principle of the test set-up to measure transfer impedance and screening attenuation of a cable assembly Figure E.3 \u2013 Example of sample preparing <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | Figure E.4 \u2013 Screening tube with separate nut Figure E.5 \u2013 Screening fixed with associated nut <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | Annex F (normative) Mixed mode S-parameters F.1 General F.2 Definition of mixed mode S-parameters Figure F.1 \u2013 Common two-port network Figure F.2 \u2013 Common four port network <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | Figure F.3 \u2013 Physical and logical ports of a VNA Figure F.4 \u2013 Nomenclature of mixed mode S-parameters <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | Figure F.5 \u2013 Measurement configuration, single ended response <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | F.3 Reference impedance of a VNA Figure F.6 \u2013 Measurement configuration, differential mode response <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | Annex G (normative) Accessories for measuring coupling attenuation G.1 TP connecting unit G.2 Termination of the DUT Table G.1 \u2013 TP-connecting unit performance characteristics (100 kHz to 2 GHz) <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | G.3 Test adapter G.3.1 General G.3.2 Direct feeding with coaxial cables Figure G.1 \u2013 Termination of the device under test, principle <\/td>\n<\/tr>\n | ||||||
| 59<\/td>\n | G.3.3 Balanced feeding cable G.3.4 Movable short circuit Figure G.2 \u2013 Balunless measurement of coupling attenuationof a balanced connector, direct feeding, principle Figure G.3 \u2013 Balunless measurement of coupling attenuation of a cable assembly using balanced feeding cable, principle <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | Figure G.4 \u2013 Balunless measurement of coupling attenuation of a cable assembly using adapters with implemented short circuit, principle <\/td>\n<\/tr>\n | ||||||
| 61<\/td>\n | Annex H (informative) Low frequency screening attenuation Figure H.1 \u2013 Example for a screening attenuation test result ofa cable assembly with a test length of 2 meters <\/td>\n<\/tr>\n | ||||||
| 62<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Metallic cables and other passive components test methods – Electromagnetic compatibility (EMC). Test method for measuring of transfer impedance ZT<\/sub> and screening attenuation aS<\/sub> or coupling attenuation aC<\/sub> of connectors and assemblies. Triaxial tube in tube method<\/b><\/p>\n |