IEC 62153-4-7:2021
(Main)Metallic cables and other passive components test methods - Part 4-7: Electromagnetic compatibility (EMC) - Test method for measuring of transfer impedance ZT and screening attenuation aS or coupling attenuation aC of connectors and assemblies - Triaxial tube in tube method
Metallic cables and other passive components test methods - Part 4-7: Electromagnetic compatibility (EMC) - Test method for measuring of transfer impedance Z<sub>T</sub> and screening attenuation a<sub>S</sub> or coupling attenuation a<sub>C</sub> of connectors and assemblies - Triaxial tube in tube method
IEC 62153-4-7:2021 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. This third edition cancels and replaces the second edition published in 2015 and its Amendment 1:2018.This edition includes the following significant technical changes with respect to the previous edition:
- Annex E contains informative information about the direct measurement of screening effectiveness of connectors;
- Annex F gives normative information about mixed mode parameters;
- Annex G contains normative information about accessories for measuring coupling attenuation;
- Annex H discusses the low frequency screening attenuation.
Méthodes d’essai des câbles métalliques et autres composants passifs - Partie 4-7: Compatibilité électromagnétique (CEM) - Méthode d’essai pour mesurer l’impédance de transfert, Z<sub>T</sub>,et l’affaiblissement d’écrantage, a<sub>S</sub>,ou l’affaiblissement de couplage, a<sub>C</sub>, des connecteurs et des cordons - Méthode triaxiale en tubes concentriques
L'IEC 62153-4-7:2021 traite de la méthode triaxiale en tubes concentriques. Cette méthode triaxiale convient pour déterminer l’impédance surfacique de transfert et/ou l’affaiblissement d’écrantage et l’affaiblissement de couplage de connecteurs écrantés et accouplés (y compris la connexion entre le câble et le connecteur) et de cordons. Cette méthode pourrait également être étendue pour déterminer l’impédance de transfert, l’affaiblissement de couplage ou l’affaiblissement d’écrantage de connecteurs symétriques ou à plusieurs broches et de cordons multiconducteurs. Cette troisième édition annule et remplace la deuxième édition parue en 2015, et son Amendement 1:2018. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
- l’Annexe E contient des informations relatives au mesurage direct de l’efficacité d’écrantage des connecteurs;
- l’Annexe F donne des informations normatives sur les paramètres du mode mixte;
- l’Annexe G contient des informations normatives concernant les accessoires permettant de mesurer l’affaiblissement de couplage;
- l’Annexe H traite de l’affaiblissement d’écrantage à basse fréquence
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IEC 62153-4-7 ®
Edition 3.0 2021-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Metallic communication cables and other passive components test methods –
Part 4-7: Electromagnetic compatibility (EMC) – Test method for measuring
of transfer impedance Z and screening attenuation a or coupling attenuation
T S
a of connectors and assemblies up to and above 3 GHz – Triaxial tube in tube
C
method
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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3, rue de Varembé info@iec.ch
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Switzerland
About the IEC
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International Standards for all electrical, electronic and related technologies.
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IEC 62153-4-7 ®
Edition 3.0 2021-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Metallic communication cables and other passive components test methods –
Part 4-7: Electromagnetic compatibility (EMC) – Test method for measuring
of transfer impedance Z and screening attenuation a or coupling attenuation
T S
a of connectors and assemblies up to and above 3 GHz – Triaxial tube in tube
C
method
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.100.10; 33.120.10 ISBN 978-2-8322-5213-0
– 2 – IEC 62153-4-7:2021 RLV © IEC 2021
CONTENTS
FOREWORD . 6
INTRODUCTION . 9
1 Scope . 10
2 Normative references. 10
3 Terms and definitions . 11
4 Physical background . 13
5 Principle of the test methods . 13
5.1 General . 13
5.2 Transfer impedance . 14
5.3 Screening attenuation . 14
5.4 Coupling attenuation . 15
6 Test procedure . 16
6.1 General . 16
6.2 Tube in tube procedure . 16
6.3 Test equipment . 17
6.4 Calibration procedure . 18
6.5 Connection between extension tube and device under test . 18
6.6 Dynamic range respectively noise floor . 19
6.7 Impedance matching . 19
6.8 Influence of adapters . 20
7 Sample preparation . 20
7.1 Coaxial connector or device . 20
7.2 Balanced or multiconductor device . 20
7.3 Cable assembly . 22
8 Measurement of transfer impedance . 22
8.1 General . 22
8.2 Principle block diagram of transfer impedance . 22
8.3 Measuring procedure – Influence of connecting cables . 23
8.4 Measuring . 23
8.5 Evaluation of test results . 23
8.6 Test report . 24
9 Screening attenuation . 24
9.1 General . 24
9.2 Impedance matching . 24
9.2.1 General . 24
9.2.2 Evaluation of test results with matched conditions . 25
9.2.3 Measuring with mismatch . 26
9.2.4 Evaluation of test results . 26
9.3 Test report . 26
10 Coupling attenuation . 27
10.1 General . 27
10.2 Procedure for testing connectors . 27
10.3 Procedure for testing cable assemblies . 28
10.4 Balunless procedure .
10.4 Expression of results Evaluation of test results when using a balun . 29
10.5 Evaluation of test results when using a multiport VNA . 30
10.6 Test report . 30
Annex A (normative) Determination of the impedance of the inner circuit . 33
Annex B (informative) Example of a self-made impedance matching adapter . 34
Annex C (informative) Measurements of the screening effectiveness of connectors
and cable assemblies . 36
C.1 General . 36
C.2 Physical basics . 36
C.2.1 General coupling equation . 36
C.2.2 Coupling transfer function . 38
C.3 Triaxial test set-up . 40
C.3.1 General . 40
C.3.2 Measurement of cable assemblies . 41
C.3.3 Measurement of connectors . 42
C.4 Conclusion . 45
Annex D (informative) Influence of contact resistances . 46
Annex E (informative) Direct measurement of screening effectiveness of connectors . 48
E.1 General Scope . 48
E.2 Test set-up. 48
E.3 Construction details of test set-up . 49
Annex F (normative) Mixed mode S-parameters . 51
F.1 General . 51
F.2 Definition of mixed mode S-parameters . 51
F.3 Reference impedance of a VNA . 54
Annex G (normative) Accessories for measuring coupling attenuation . 55
G.1 TP connecting unit . 55
G.2 Termination of the DUT . 55
G.3 Test adapter . 56
G.3.1 General . 56
G.3.2 Direct feeding with coaxial cables . 56
G.3.3 Balanced feeding cable . 57
G.3.4 Movable short circuit . 57
Annex H (informative) Low frequency screening attenuation . 59
Bibliography . 60
Figure 1 – Definition of Z . 11
T
Figure 2 – Principle of the test set-up to measure transfer impedance and screening or
coupling attenuation of connectors with tube in tube . 14
Figure 3 – Principle of the test set-up to measure transfer impedance and screening
attenuation of a cable assembly . 17
Figure 4 – Principle set-up for verification test . 19
Figure 5 – Preparation of balanced or multiconductor connectors . 22
Figure 6 – Test set-up (principle) for transfer impedance measurement according to
test method B of IEC 62153-4-3 with load resistor in inner circuit and without damping
resistor in outer circuit . 23
Figure 7 – Measuring the screening attenuation with tube in tube with impedance
matching device . 25
Figure 8 – Measuring the coupling attenuation with tube in tube and balun .
– 4 – IEC 62153-4-7:2021 RLV © IEC 2021
Figure 8 – Coupling attenuation, principle test set-up with 2-port VNA and balun . 28
Figure 9 – Coupling attenuation, principle set-up with multiport VNA and
TP‑connecting unit .
...
IEC 62153-4-7 ®
Edition 3.0 2021-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Metallic cables and other passive components test methods –
Part 4-7: Electromagnetic compatibility (EMC) – Test method for measuring
of transfer impedance Z and screening attenuation a or coupling attenuation
T S
a of connectors and assemblies – Triaxial tube in tube method
C
Méthodes d’essai des câbles métalliques et autres composants passifs –
Partie 4-7: Compatibilité électromagnétique (CEM) – Méthode d’essai pour
mesurer l’impédance de transfert, Z ,et l’affaiblissement d’écrantage, a , ou
T S
l’affaiblissement de couplage, a , des connecteurs et des cordons – Méthode
C
triaxiale en tubes concentriques
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
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CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC online collection - oc.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always
committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.
and withdrawn publications.
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containing more than 22 000 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 18 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
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IEC 62153-4-7 ®
Edition 3.0 2021-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Metallic cables and other passive components test methods –
Part 4-7: Electromagnetic compatibility (EMC) – Test method for measuring
of transfer impedance Z and screening attenuation a or coupling attenuation
T S
a of connectors and assemblies – Triaxial tube in tube method
C
Méthodes d’essai des câbles métalliques et autres composants passifs –
Partie 4-7: Compatibilité électromagnétique (CEM) – Méthode d’essai pour
mesurer l’impédance de transfert, Z ,et l’affaiblissement d’écrantage, a , ou
T S
l’affaiblissement de couplage, a , des connecteurs et des cordons – Méthode
C
triaxiale en tubes concentriques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100.10; 33.120.10 ISBN 978-2-8322-9988-3
– 2 – IEC 62153-4-7:2021 © IEC 2021
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references. 9
3 Terms and definitions . 10
4 Physical background . 12
5 Principle of the test methods . 12
5.1 General . 12
5.2 Transfer impedance . 13
5.3 Screening attenuation . 13
5.4 Coupling attenuation . 14
6 Test procedure . 15
6.1 General . 15
6.2 Tube in tube procedure . 15
6.3 Test equipment . 16
6.4 Calibration procedure . 16
6.5 Connection between extension tube and device under test . 17
6.6 Dynamic range respectively noise floor . 17
6.7 Impedance matching . 18
6.8 Influence of adapters . 18
7 Sample preparation . 19
7.1 Coaxial connector or device . 19
7.2 Balanced or multiconductor device . 19
7.3 Cable assembly . 21
8 Measurement of transfer impedance . 21
8.1 General . 21
8.2 Principle block diagram of transfer impedance . 21
8.3 Measuring procedure – Influence of connecting cables . 22
8.4 Measuring . 22
8.5 Evaluation of test results . 22
8.6 Test report . 23
9 Screening attenuation . 23
9.1 General . 23
9.2 Impedance matching . 23
9.2.1 General . 23
9.2.2 Evaluation of test results with matched conditions . 24
9.2.3 Measuring with mismatch . 25
9.2.4 Evaluation of test results . 25
9.3 Test report . 25
10 Coupling attenuation . 26
10.1 General . 26
10.2 Procedure for testing connectors . 26
10.3 Procedure for testing cable assemblies . 27
10.4 Evaluation of test results when using a balun . 28
10.5 Evaluation of test results when using a multiport VNA . 28
10.6 Test report . 29
Annex A (normative) Determination of the impedance of the inner circuit . 30
Annex B (informative) Example of a self-made impedance matching adapter . 31
Annex C (informative) Measurements of the screening effectiveness of connectors
and cable assemblies . 33
C.1 General . 33
C.2 Physical basics . 33
C.2.1 General coupling equation . 33
C.2.2 Coupling transfer function . 35
C.3 Triaxial test set-up . 37
C.3.1 General . 37
C.3.2 Measurement of cable assemblies . 38
C.3.3 Measurement of connectors . 39
C.4 Conclusion . 42
Annex D (informative) Influence of contact resistances . 43
Annex E (informative) Direct measurement of screening effectiveness of connectors . 45
E.1 Scope . 45
E.2 Test set-up. 45
E.3 Construction details of test set-up . 46
Annex F (normative) Mixed mode S-parameters . 48
F.1 General . 48
F.2 Definition of mixed mode S-para
...
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