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IEC 62153-4-5
Edition 2.0 2021-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Metallic communication cable test methods –
Part 4-5: Electromagnetic compatibility (EMC) – Screening or coupling
attenuation – Absorbing clamp method
Méthodes d’essai des câbles métalliques de communication –
Partie 4-5: Compatibilité électromagnétique (CEM) – Affaiblissement d’écran ou
de couplage – Méthode de la pince absorbante
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IEC 62153-4-5
Edition 2.0 2021-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Metallic communication cable test methods –
Part 4-5: Electromagnetic compatibility (EMC) – Screening or coupling
attenuation – Absorbing clamp method
Méthodes d’essai des câbles métalliques de communication –
Partie 4-5: Compatibilité électromagnétique (CEM) – Affaiblissement d’écran ou
de couplage – Méthode de la pince absorbante
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100.10; 33.120.10 ISBN 978-2-8322-1013-5
– 2 – IEC 62153-4-5:2021 © IEC 2021
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Principles of the test method . 7
5 Equipment . 8
5.1 General . 8
5.2 Balun requirements . 9
5.3 TP connecting unit requirements . 11
5.4 Test sample . 12
5.4.1 Tested cable length . 12
5.4.2 Preparation of test sample . 12
6 Test set-up . 14
6.1 Test set-up calibration . 14
6.2 Composite loss of the test set-up . 14
6.2.1 General . 14
6.2.2 Reflection loss of the absorbing clamp in the calibration set-up . 15
6.3 Attenuation of the measuring set-up . 16
6.4 Insertion loss of the absorbers . 16
6.5 Test set-up arrangement . 17
6.5.1 Test set-up verification . 20
6.6 Pulling force on cable . 20
7 Procedure . 21
7.1 General . 21
7.2 Screening attenuation of coaxial respectively quasi coaxial cables . 22
7.2.1 Matched conditions . 22
7.2.2 Unmatched conditions . 23
7.3 Coupling attenuation of balanced cables . 24
7.3.1 Coupling attenuation measurement with balun . 24
7.3.2 Balunless coupling attenuation measurement − Set-up . 25
7.3.3 Expression of test results . 25
8 Test report . 25
9 Requirement . 26
Annex A (normative) Determination of the impedance of the inner circuit . 27
A.1 Determination of impedance of inner circuit . 27
A.2 Impedance matching device if Z < 50 Ω . 27
A.3 Impedance matching device if Z > 50 Ω . 28
Annex B (informative) Example of a self-made impedance matching adapter . 29
Annex C (informative) Evaluation of test results for the coupling attenuation of
balanced cables . 31
C.1 Worst case . 31
C.2 Examples . 31
Annex D (informative) Reflection loss of a junction . 34
Annex E (informative) Mixed mode parameters . 36
E.1 Definition of mixed mode S-parameters . 36
E.2 Reference impedance of VNA . 39
Bibliography . 40
Figure 1 – Measurement of near end screening attenuation, principle . 9
Figure 2 – Measurement of near end coupling attenuation with balun . 11
Figure 3 – Balunless measuring of near end coupling attenuation with multiport VNA . 12
Figure 4 – Termination of a screened symmetrical cable . 13
Figure 5 – Preparation of test sample (symmetrical and multi conductor cables) . 13
Figure 6 – Calibration set-up . 15
Figure 7 – Termination during calibration . 15
Figure 8 – Measurement of the insertion loss of an absorber . 17
Figure 9 – Example of screen connections for screened twisted pair cable
measurement . 18
Figure 10 – Test set-up for near end measurement of symmetrical cable . 19
Figure 11 – Measurement of surface wave at near end of sample, principle . 19
Figure 12 – Measurement of surface wave at far end of sample, principle . 20
Figure 13 – Shielding arrangements for a far end measurement. 21
Figure A.1 – Impedance matching for Z <50 Ω . 28
Figure A.2 – Impedance matching for Z >50 Ω . 28
Figure B.1 – Attenuation and return loss . 29
Figure B.2 – Attenuation and return loss . 30
Figure C.1 – Example measurement of a foil screen symmetrical cable . 31
Figure C.2 – Example measurement of a well screened symmetrical cable . 32
Figure C.3 – Example measurement of a well screened coaxial cable . 32
Figure C.4 – Frequent measurement error of a symmetrical cable . 33
Figure C.5 – Frequent measurement error of a symmetrical cable . 33
Figure D.1 – Source with R and R . 34
i L
Figure E.1 – Common two-port network . 36
Figure E.2 – Common four port network .
...