EN IEC 62153-4-7:2021/prA1:2025
(Amendment)Amendment 1 - 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
Amendment 1 - 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
Amendement 1 - 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, ZT,et l’affaiblissement d’écrantage, aS,ou l’affaiblissement de couplage, aC, des connecteurs et des cordons - Méthode triaxiale en tubes concentriques
Preskusne metode za kovinske kable in druge pasivne komponente - 4-7. del: Elektromagnetna združljivost (EMC) - Preskusna metoda za meritve prehodne impedance ZT in zaslonskega slabljenja aS ali sklopnega slabljenja aC konektorjev in sestavov - Metoda "cev v cevi" - Dopolnilo A1
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Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2025
Preskusne metode za kovinske kable in druge pasivne komponente - 4-7. del:
Elektromagnetna združljivost (EMC) - Preskusna metoda za meritve prehodne
impedance ZT in zaslonskega slabljenja aS ali sklopnega slabljenja aC konektorjev
in sestavov - Metoda "cev v cevi" - Dopolnilo A1
Amendment 1 - 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
Amendement 1 - 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, ZT,et l’affaiblissement d’écrantage, aS,ou l’affaiblissement de
couplage, aC, des connecteurs et des cordons - Méthode triaxiale en tubes
concentriques
Ta slovenski standard je istoveten z: EN IEC 62153-4-7:2021/prA1:2025
ICS:
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
33.120.10 Koaksialni kabli. Valovodi Coaxial cables. Waveguides
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
46/1031/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62153-4-7/AMD1 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-01-31 2025-04-25
SUPERSEDES DOCUMENTS:
46/1009/CD, 46/1027/CC
IEC TC 46 : CABLES, WIRES, WAVEGUIDES, RF CONNECTORS, RF AND MICROWAVE PASSIVE COMPONENTS AND ACCESSORIES
SECRETARIAT: SECRETARY:
United States of America Mr David Hess
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
SC 18A, TC 20, SC 46A, SC 46C, SC 46F, SC 48B
ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of CENELEC,
is drawn to the fact that this Committee Draft for Vote (CDV) is
submitted for parallel voting.
The CENELEC members are invited to vote through the CENELEC
online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
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Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries” clauses to be
included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for submitting ISC clauses. (SEE
AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Amendment 1 – 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 a of connectors and assemblies – Triaxial tube in tube method
C
PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
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46/1031/CDV – 2 – IEC CDV 62153-4-7:2021/
AMD1 © IEC 2025
FOREWORD
This amendment has been prepared by IEC technical committee 46: Cables, wires, waveguides,
RF connectors, RF and microwave passive components and accessories.
The text of this amendment is based on the following documents:
Draft Report
46/xxxx/xx 46/xxxx/xx
Full information on the voting for the approval of this amendment can be found in the report on
voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC website under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
_____________
IEC CDV 62153-4-7:2021/ – 3 – 46/1031/CDV
AMD1 © IEC 2025
1 Introductory note:
2 The goal of this amendment is:
3 – to extend coupling attenuation measurements to unscreened connectors and cable
4 assemblies
5 – to extend coupling attenuation measurements of connectors and cable assemblies to low
6 frequencies by introducing the LFCA
7 – to extend the clause 10.5, expression of results by a conversion formula between scattering
8 parameter and coupling attenuation
9 – to introduce the application of a 20 dB/dec envelope curve for coupling attenuation
10 – to introduce the effect and the mitigation techniques of higher order modes when doing high
11 frequency measurements beyond the higher order mode cutoff-frequency of the triaxial outer
12 system
13 Rationale:
14 In the triaxial methods the formula to convert from measured voltage ratio to coupling
15 attenuation is not always correctly applied. The formula will therefore be extended to the
16 measured S-parameter.
17 To make test results comparable, an envelope curve is introduced.
18 Add, after Annex H, the following new Annexes I, J, K, and L:
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20 Annex I
21 (normative)
23 Coupling attenuation of unscreened single or multiple pairs
24 I.1 General
25 Annex D of IEC 62153-4-9 describes the measurement of the coupling attenuation of unscreened
26 single or multiple balanced pairs within balanced cables with a test set-up as depicted in Figure I.1.
29 Figure I.1 Coupling attenuation of unscreened balanced pairs/cables
30 The triaxial test-set-up of screened coaxial or balanced cables under test (CUT) forms a short
31 circuit between the screen of the CUT and the outer tube at the near end. In case of unscreened
32 balanced cables, a short to the outer tube is not possible. Here the inner system is formed by
33 the CUT driven in differential mode and the outer system is formed by the tube and the and the
34 common mode of the CUT.
35 Annex D of IEC 62153-4-9 describes the following measurements for unscreened pairs:
36 - Near-end coupling attenuation of a single unscreened balanced pair
37 - Far end screening attenuation and coupling attenuation of single unscreened balanced pairs
38 - Screening- and coupling attenuation measurement of multiple unscreened balanced pairs
39 The measurement principles for unscreened balanced pairs/cables can also be applied to connectors
40 and cable assemblies.
42 This annex describes the specific procedures for measuring coupling attenuation of connectors or
43 cable assemblies applying unscreened single or multiple balanced pairs.
44 I.2 Coupling attenuation of unscreened connector
45 The measurement of the coupling attenuation of an unscreened connector is shown in figure
46 I.2. The signal feeding section can be realised by two coaxial feeding cables of the same
47 electrical length because of the needed symmetry. The feeding cables are located in a tube in
48 tube section. This provides additional shielding and ensures that no coupling is introduced by
49 the feeder cables. The test adapter provides an interface to the connector under test (DUT).
Test adapter
Generator, 180° phase shift
Balanced load
Tube in tube
Screening cap
Coaxial feeding cables
Generator
Receiver
DUT
51 Figure I.2 Coupling attenuation of an unscreened connector
IEC CDV 62153-4-7:2021/ – 5 – 46/1031/CDV
AMD1 © IEC 2025
52 The connector under test is terminated with a balanced load of two times 50 Ohms. This
53 generates a differential impedance of 100 Ohm and a common mode impedance of 25 Ohm.
54 The generators show a phase difference of 180° providing a differential signal to the DUT.
55 I.3 Coupling attenuation of unscreened cable assembly
56 If the length of the cable assembly under test (DUT) fits into the triaxial test setup a test
57 arrangement according to figure I.3 should be applied. Test adapters shall intermate with the
58 interfaces of the DUT.
Test adapter
Generator, 180° phase shift
DUT
Balanced load
Tube in tube
Screening cap
Coaxial feeding cables
Generator
Receiver
60 Figure I.3 Coupling attenuation of unscreened cable assembly
61 The cable assembly under test is terminated with a balanced load of two times 50 Ohms. This
62 generates a differential impedance of 100 Ohm and a common mode impedance of 25 Ohm.
63 The generators show a phase difference of 180° providing a differential signal to the DUT.
64 I.4 Coupling attenuation of long unscreened cable assembly
65 If a cable assembly is longer than the triaxial test setup it shall be cut on one end so that the
66 residual length of the assembly fit into the test setup. The loose end of the assembly shall be
67 connected to the feeding adapter by an appropriate connection method like clamping or
68 soldering. The connector side shall be connected to the intermateable test adapter on the far
69 end side at the receiver as depicted in Figure I.4.
Clamp or solder Test adapter
Generator
Tube in tube DUT
Balanced load
Screening cap
Coaxial feeding cables
Generator, 180° phase shift
Receiver
71 Figure I.4 coupling attenuation of long unscreened cable assembly
72 The residual cable assembly under test is terminated with a balanced load of two times 50
73 Ohms. This generates a differential impedance of 100 Ohm and a common mode impedance of
74 25 Ohm. The generators show a phase difference of 180° providing a differential signal to the
75 DUT.
77 I.5 Alternative coupling attenuation test method for cable assembly
78 If the cable assembly under test has an intermateable connector pair, an alternative test method
79 can be applied. Cut the cable assembly in the middle, connect the connectorized ends together
80 and mount the connected test object into the test fixture as shown in Figure I.5.
46/1031/CDV – 6 – IEC CDV 62153-4-7:2021/
AMD1 © IEC 2025
Clamp or solder Test adapter
Generator
DUT
Balanced load
Tube in tube
Screening cap
Coaxial feeding cables
Generator, 180° phase shift Receiver
82 Figure I.5 Coupling attenuation of connected ends
83 The connected cable assembly under test is terminated with a balanced load of two times 50
84 Ohms. This generates a differential impedance of 100 Ohm and a common mode impedance of
85 25 Ohm. The generators show a phase difference of 180° providing a differential signal to the
86 DUT.
IEC CDV 62153-4-7:2021/ – 7 – 46/1031/CDV
AMD1 © IEC 2025
88 Annex J
89 (normative)
91 Low Frequency Coupling Attenuation (LFCA)
92 J.1 General
93 Coupling attenuation is a screening effectiveness parameter of balanced cables and connectors
94 that combines the effect of reduction of interference by balance and screening attenuation. The
95 basic concept and the measurement of coupling attenuation aC is described in chapter 5.6 and
96 chapter 10, resp. of this document. The evaluation of the coupling attenuation requires
97 electrically long test devices. This means that the frequency area is limited towards low
98 frequencies by the cut-off frequency which is a function of the coupling length and difference of
99 propagation velocities of the inner and outer circuit of the triaxial arrangement as shown in
100 equation 7 of this document. Typically, coupling attenuation measurements are done from 30
101 MHz upwards.
102 The advent of new ethernet protocols like 10 Mbit/s (IEEE 802.3cg) and 100 M bit/s (IEEE
103 802.3bw) requires a test procedure for the EMC related behaviour of connectors and cable
104 assemblies at lower frequencies starting from 100kHz. IEC 62153-4-9:2018/AMD1:2020 ED2
105 describes the measurement of the coupling attenuation at low frequencies (LFCA) on
106 symmetrical cables. The LFCA can also be measured analogously for connectors and cable
107 assemblies and is described in this Annex.
108 J.2 Test procedure
109 The measurement set-up for LFCA is basically the same as the set-up for measuring the
110 coupling attenuation at higher frequencies. The basic test procedure is described in chapter 6
111 of the main document.
112 It has been found that the results for LFCA of differential cables are depending on the test
113 length. To get comparable test results between different test laboratories respectively between
114 different test samples, the same test length shall be applied. A test length of 3m has been
115 defined as an appropriate length.
116 J.3 Sample preparation
117 The basics of the sample preparation are described in chapter 7 of the main document.
118 J.4 Set-up verification and measurement uncertainties
119 Optimally calibrated and phase-stabilized measuring devices (VNA, test leads and connecting
120 units) show a specific frequency-dependent course of a system-mode conversion.
121 This is at low frequencies between –80 dB and –70 dB and increases with increasing
122 frequencies at about –60 dB to –40 dB. Depending on the phase position, this system-mode
123 conversion superimposes the mode conversion of the test object constructively or destructively.
124 The result of the measurement is thereby falsified and, in particular, very strong if the amount
125 of the mode conversion of the test object approaches or even undershoots the amount of the
126 system mode conversion.
127 All low frequency coupling attenuation (aC,lf) measurements and measurements of high c
...
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