|
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
your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de
CH-1211 Geneva 20
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and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
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.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
.
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 .
...