BS IEC 62153-4-15:2015
$167.15
Metallic Communication Cable test methods – Electromagnetic compatibility (EMC). Test method for measuring transfer impedance and screening attenuation or coupling attenuation with triaxial cell
| Published By | Publication Date | Number of Pages |
| BSI | 2015 | 44 |
This part of IEC 62153 specifies the procedures for measuring with triaxial cell the transfer impedance, screening attenuation or the coupling attenuation of connectors, cable assemblies and components, e.g. accessories for analogue and digital transmission systems and equipment for communication networks and cabling (in accordance with the scope of IEC technical committee 46).
Measurements can be achieved by applying the device under test direct to the triaxial cell or with the tube in tube method in accordance with IEC 62153-4-7.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | CONTENTS |
| 7 | FOREWORD |
| 9 | 1 Scope 2 Normative references |
| 10 | 3 Terms and definitions Figures Figure 1 – Definition of ZT |
| 12 | 4 Physical background 5 Principle of the test methods 5.1 General Tables Table 1 – IEC 62153-4-x, Metallic communication cable test methods – Test procedures with triaxial test set-up |
| 13 | 5.2 Transfer impedance Figure 2 – Principle depiction of the triaxial cell to measure transfer impedance and screening attenuation Figure 3 – Principle depiction of the triaxial cell to measure transfer impedance and screening attenuation of assemblies with tube in tube according to IEC 62153-4-7 |
| 14 | 5.3 Screening attenuation 5.4 Coupling attenuation |
| 15 | 5.5 Tube in tube method 6 Test procedures 6.1 General 6.2 Triaxial cell 6.3 Cut off frequencies, higher order modes |
| 16 | 6.4 Test equipment 6.5 Calibration procedure |
| 17 | 6.6 Test leads and connecting cables to DUT 7 Sample preparation 7.1 Coaxial connector or assembly or quasi-coaxial component 7.2 Balanced or multipin connector or component |
| 18 | 7.3 Cable assemblies Figure 4 – Preparation of balanced or multipin connectors for transfer impedance and screening attenuation Figure 5 – Preparation of balanced or multipin connectors for coupling attenuation measurement |
| 19 | 7.4 Other screened devices 8 Transfer impedance (short – matched) 8.1 General 8.2 Principle block diagram of transfer impedance Figure 6 – Test set-up (principle) for transfer impedance measurement according to test method B of IEC 62153-4-3 |
| 20 | 8.3 Measuring procedure 8.4 Evaluation of test results 8.5 Test report |
| 21 | 9 Screening attenuation 9.1 General 9.2 Impedance matching 9.3 Measuring with matched conditions 9.3.1 Procedure 9.3.2 Evaluation of test results |
| 22 | 9.4 Measuring with mismatch 9.4.1 General 9.4.2 Evaluaton of test results |
| 23 | 9.5 Test report 10 Coupling attenuation 10.1 Procedure 10.2 Expression of results |
| 24 | 10.3 Test report 11 Coupling transfer function |
| 25 | Annexes Annex A (informative) Principle of the triaxial test procedure Figure A.1 – Principle test set-up to measure transfer impedance and screening attenuation Figure A.2 – Equivalent circuit of the principle test set-up in Figure A.1 |
| 27 | Annex B (informative) Triaxial cell Figure B.1 – Principle depiction of the triaxial cell to measure transfer impedance and screening attenuation at HV-assemblies with tube in tube according to IEC 62153-4-7 |
| 28 | Figure B.2 – Example of different designs of triaxial cells |
| 29 | Annex C (informative) Cut off frequencies, higher order modes Table C.1 – Resonance frequencies of different triaxial cells |
| 30 | Figure C.1 – Comparison of the measurements with tube and with triaxial cell of a RG 11 cable with single braid construction, linear scale |
| 31 | Figure C.2 – Comparison of the measurements with tube and with triaxial cell of a cable RG 11 with single braid construction, log scale |
| 32 | Annex D (informative) Coupling transfer function Figure D.1 – Measured coupling transfer function of a braided screen vs. frequency with the triaxial cell |
| 34 | Annex E (informative) Attenuation versus scattering parameter S21 Figure E.1 – Measurement with HP8753D of S21 of a 3dB attenuator |
| 35 | Figure E.2 – Measurement with ZVRE of S21 of a 3dB attenuator |
| 36 | Annex F (informative) Application of a moveable shorting plane F.1 Effect of the measurement length on the measurement cut-off frequency F.2 Details of the movable shorting plane Figure F.1 – Crosssection of triaxial cell with movable shorting plane |
| 37 | Figure F.2 – Crosscut of plane shortening housing and tube-in-tube Figure F.3 – Detail H of figure F.2: contact between plane and housing |
| 38 | F.3 Measurement results Figure F.4 – Detail G of figure F.2: contact between plane and tube-in-tube Figure F.5 – Compilation of transfer impedance test results with different shorting plane distances |
| 39 | Annex G (informative) Correction in case the receiver input impedance R is higher than the characteristic impedance of the outer circuit Z2 Figure G.1 – Example of forward transfer scattering parameter S21 for different impedances in the outer circuit where the receiver input impedance is 50Ω |
| 40 | Figure G.2 – DUT with uniform cylindrical shape in the centre of the cell |
| 41 | Bibliography |
