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BS EN IEC 62153-4-7:2021 Metallic cables and other passive components test methods - Electromagnetic compatibility (EMC). Test method for measuring of transfer impedance ZT and screening attenuation aS or coupling attenuation aC, 2021
- undefined
- Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
- English [Go to Page]
- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- Figures [Go to Page]
- Figure 1 – Definition of ZT
- 4 Physical background
- 5 Principle of the test methods [Go to Page]
- 5.1 General
- Tables [Go to Page]
- Table 1 – IEC 62153, Metallic communication cable test methods –Test procedures with triaxial test set-up
- 5.2 Transfer impedance
- 5.3 Screening attenuation
- Figure 2 – Principle of the test set-up to measure transfer impedanceand screening or coupling attenuation of connectors with tube in tube
- 5.4 Coupling attenuation
- 6 Test procedure [Go to Page]
- 6.1 General
- 6.2 Tube in tube procedure
- Figure 3 – Principle of the test set-up to measure transfer impedanceand screening attenuation of a cable assembly
- 6.3 Test equipment
- 6.4 Calibration procedure
- 6.5 Connection between extension tube and device under test
- 6.6 Dynamic range respectively noise floor
- 6.7 Impedance matching
- 6.8 Influence of adapters
- Figure 4 – Principle set-up for verification test
- 7 Sample preparation [Go to Page]
- 7.1 Coaxial connector or device
- 7.2 Balanced or multiconductor device
- 7.3 Cable assembly
- 8 Measurement of transfer impedance [Go to Page]
- 8.1 General
- 8.2 Principle block diagram of transfer impedance
- Figure 5 – Preparation of balanced or multiconductor connectors
- 8.3 Measuring procedure – Influence of connecting cables
- 8.4 Measuring
- 8.5 Evaluation of test results
- Figure 6 – 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
- 8.6 Test report
- 9 Screening attenuation [Go to Page]
- 9.1 General
- 9.2 Impedance matching [Go to Page]
- 9.2.1 General
- 9.2.2 Evaluation of test results with matched conditions
- Figure 7 – Measuring the screening attenuation with tube in tubewith impedance matching device [Go to Page]
- 9.2.3 Measuring with mismatch
- 9.2.4 Evaluation of test results
- 9.3 Test report
- 10 Coupling attenuation [Go to Page]
- 10.1 General
- 10.2 Procedure for testing connectors
- Figure 8 – Coupling attenuation, principle test set-up with 2-port VNA and balun
- 10.3 Procedure for testing cable assemblies
- Figure 9 – Coupling attenuation, principle set-up with multiport VNAand TP‑connecting unit
- Figure 10 – Coupling attenuation, principle test set-up with multiport VNA and TP‑connecting unit for measuring complete cable assemblies
- 10.4 Evaluation of test results when using a balun
- 10.5 Evaluation of test results when using a multiport VNA
- Figure 11 – Coupling attenuation, principle test set-up with multiport VNAand TP‑connecting unit for measuring halved cable assemblies
- 10.6 Test report
- Figure 12 – Typical measurement of a connector of 0,04 m lengthwith 1 m extension tube
- Annexes [Go to Page]
- Annex A (normative) Determination of the impedance of the inner circuit
- Annex B (informative) Example of a self-made impedance matching adapter
- Figure B.1 – Attenuation and return loss of a 50 Ω to 5 Ω impedance matching adapter, log scale
- Figure B.2 – Attenuation and return loss of a 50 Ω to 5 Ω impedance matching adapter, lin scale
- Annex C (informative) Measurements of the screening effectiveness of connectors and cable assemblies [Go to Page]
- C.1 General
- C.2 Physical basics [Go to Page]
- C.2.1 General coupling equation
- Figure C.1 – Equivalent circuit of coupled transmission lines [Go to Page]
- [Go to Page]
- C.2.2 Coupling transfer function
- Figure C.2 – Summing function S
- Figure C.3 – Calculated coupling transfer function (l = 1 m; er1 = 2,3; er2 = 1; ZF = 0) [Go to Page]
- C.3 Triaxial test set-up [Go to Page]
- C.3.1 General
- Figure C.4 – Triaxial set-up for the measurement of the screening attenuation aS and the transfer impedance ZT [Go to Page]
- [Go to Page]
- C.3.2 Measurement of cable assemblies
- C.3.3 Measurement of connectors
- Figure C.5 – Simulation of a cable assembly (logarithmic scale)
- Figure C.6 – Simulation of a cable assembly (linear scale)
- Figure C.7 – Triaxial set-up with extension tube for short cable assemblies
- Figure C.8 – Triaxial set-up with extension tube for connectors
- Figure C.9 – Simulation,logarithmic frequency scale
- Figure C.10 – Measurement,logarithmic frequency scale
- Figure C.11 – Simulation,linear frequency scale
- Figure C.12 – Measurement,linear frequency scale [Go to Page]
- C.4 Conclusion
- Figure C.13 – Simulation,logarithmic frequency scale
- Figure C.14 – simulation,linear frequency scale
- Annex D (informative) Influence of contact resistances
- Figure D.1 – Contact resistances of the test set-up
- Figure D.2 – Equivalent circuit of the test set-up
- Annex E (informative) Direct measurement of screening effectiveness of connectors [Go to Page]
- E.1 Scope
- E.2 Test set-up
- Figure E.1 – Principle of the test set-up to measure transfer impedance and screening attenuation of a connector [Go to Page]
- E.3 Construction details of test set-up
- Figure E.2 – Principle of the test set-up to measure transfer impedance and screening attenuation of a cable assembly
- Figure E.3 – Example of sample preparing
- Figure E.4 – Screening tube with separate nut
- Figure E.5 – Screening fixed with associated nut
- Annex F (normative) Mixed mode S-parameters [Go to Page]
- F.1 General
- F.2 Definition of mixed mode S-parameters
- Figure F.1 – Common two-port network
- Figure F.2 – Common four port network
- Figure F.3 – Physical and logical ports of a VNA
- Figure F.4 – Nomenclature of mixed mode S-parameters
- Figure F.5 – Measurement configuration, single ended response [Go to Page]
- F.3 Reference impedance of a VNA
- Figure F.6 – Measurement configuration, differential mode response
- Annex G (normative) Accessories for measuring coupling attenuation [Go to Page]
- G.1 TP connecting unit
- G.2 Termination of the DUT
- Table G.1 – TP-connecting unit performance characteristics (100 kHz to 2 GHz) [Go to Page]
- G.3 Test adapter [Go to Page]
- G.3.1 General
- G.3.2 Direct feeding with coaxial cables
- Figure G.1 – Termination of the device under test, principle [Go to Page]
- [Go to Page]
- G.3.3 Balanced feeding cable
- G.3.4 Movable short circuit
- Figure G.2 – Balunless measurement of coupling attenuationof a balanced connector, direct feeding, principle
- Figure G.3 – Balunless measurement of coupling attenuation of a cable assembly using balanced feeding cable, principle
- Figure G.4 – Balunless measurement of coupling attenuation of a cable assembly using adapters with implemented short circuit, principle
- Annex H (informative) Low frequency screening attenuation
- Figure H.1 – Example for a screening attenuation test result ofa cable assembly with a test length of 2 meters
- Bibliography [Go to Page]
