SIST EN 61935-1:2010

SLOVENSKI STANDARD
01-marec-2010
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Testing of balanced communication cabling in accordance with ISO/IEC 11801 - Part 1:
Installed cabling (IEC 61935-1:2009, modified)
Spezifikation für die Prüfung der symmetrischen und koaxialen informationstechnischen
Verkabelung - Teil 1: Installierte symmetrische Verkabelung nach EN 50173 und
entsprechenden Normen (IEC 61935-1:2009, modifiziert)
Spécification relative aux essais de câblages symétriques et coaxiaux propres aux
technologies de l'information - Partie 1: Câblages symétriques installés selon la série de
normes EN 50173 (CEI 61935-1:2009, modifiée)
Ta slovenski standard je istoveten z: EN 61935-1:2009
ICS:
33.120.10 Koaksialni kabli. Valovodi Coaxial cables. Waveguides
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61935-1
NORME EUROPÉENNE
December 2009
EUROPÄISCHE NORM
ICS 33.120.10 Supersedes EN 61935-1:2005

English version
Specification for the testing of balanced
and coaxial information technology cabling -
Part 1: Installed balanced cabling as specified
in the standards series EN 50173
(IEC 61935-1:2009, modified)
Spezifikation für die Prüfung
Spécification relative aux essais
der symmetrischen und koaxialen
de câblages symétriques et coaxiaux
informationstechnischen Verkabelung -
propres aux technologies de l'information -
Teil 1: Installierte symmetrische
Partie 1: Câblages symétriques installés
Verkabelung nach EN 50173
selon la série de normes EN 50173
und entsprechenden Normen
(CEI 61935-1:2009, modifiée)
(IEC 61935-1:2009, modifiziert)

This European Standard was approved by CENELEC on 2009-10-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia,
Slovenia, Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: Avenue Marnix 17, B - 1000 Brussels

© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61935-1:2009 E
Foreword
The text of document 46/323/FDIS, future edition 3 of IEC 61935-1, prepared by IEC TC 46, Cables,
wires, waveguides, R.F. connectors, R.F. and microwave passive components and accessories, was
submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61935-1 on
2009-10-01 with common modifications prepared by the German national committee to have the standard
refer to the relevant European Standards.
This European Standard supersedes EN 61935-1:2005.
This new edition includes test methods for exogenous (alien) crosstalk. It also includes a new annex for
uncertainty and variability of field test results.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2010-07-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2012-10-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
- 3 - EN 61935-1:2009
Endorsement notice
The text of the International Standard IEC 61935-1:2009 was approved by CENELEC as a European
Standard with agreed common modifications as given below.
COMMON MODIFICATIONS
Title page
Replace "ISO/IEC 11801 and related standards" by "the standards series EN 50173".
General
Replace "ISO/IEC 11801" and "ISO/IEC 11801 (or equivalent)" by "EN 50173-1" in Subclauses 3.2, 4.2.5
(twice), 4.13.4.3, 5.3.1, 5.3.2.2, 5.3.3, 5.3.4 (twice), 5.3.5, 5.3.6, 5.3.8, 5.3.9, 5.3.10, 5.4.7.2, 5.4.7.3,
5.4.8.1, 5.5.5 and 6.2
Replace all other occurrences of "ISO/IEC 11801" and "ISO/IEC 11801 (or equivalent)" by "series
EN 50173", i.e. in the introduction and in (Sub)Clauses 3, 3.1, and 6.11.1.
Clause 1, Scope
Replace the first paragraph by:
This part of EN 61935 specifies reference measurement procedures for cabling parameters and the
requirements for field tester accuracy to measure cabling parameters identified in series EN 50173. This
standard does not apply to EN 50173-4.
Clause 2, Normative references
Replace "ISO/IEC 11801" by:
EN 50173, series, Information technology - Generic cabling systems
Replace ISO/IEC/TR 14763-2 by:
EN 50174-1, Information technology - Cabling installation - Part 1: Installation specification and quality
assurance
Subclause 5.4.8.1, Selection of disturbed links
Replace “ISO/IEC/TR 14763-2” by “EN 50174-1”.
Subclause 5.1, General
Replace paragraphs 1 to 3 by:
This clause applies to field test specifications for post-installation performance measurements of installed
cabling designed in accordance with series EN 50173.
The information contained in this clause uses the links defined in series EN 50173 and specifies
parameters for field testers, test methods and interpretations of test results, leading to a practical solution
to the issues related to field testing. Classes of twisted pair cabling links referred to herein correspond
with those described in EN 50173-1.

Field test equipment is classified by performance level. Currently levels I, II, IIE, III, IIIE and IV are used in
the industry. This clause specifies requirements for field test equipment used to certify class D, E, E , F
A
and F cabling as defined in EN 50173-1.
A
Subclause 5.5.8, Administration system applicability
Replace “ISO/IEC 14763-1” by “EN 50174-1”.
Bibliography
Add the following note under IEC 61935-3:
NOTE Harmonized as EN 61935-3:2009.
Delete reference to ISO/IEC 14763-1.
___________
- 5 - EN 61935-1:2009
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

– – Information technology - Generic cabling EN 50173 Series
systems
1)
– – Information technology - Cabling installation - EN 50174-1 –
Part 1: Installation specification and quality
assurance
1)
– – Communication cables - Specifications for EN 50289-1-15 –
test methods -
Part 1-15: Electromagnetic performance -
Coupling attenuation of links and channels
(Laboratory conditions)
1)
IEC 60169-22 – Radio-frequency connectors - – –
Part 22: R.F. two-pole bayonet coupled
connectors for use with shielded balanced
cables having twin inner conductors (Type
BNO)
1) 2)
IEC 60512-25-9 – Connectors for electronic equipment - Tests EN 60512-25-9 2008
and measurements - Part 25-9: Signal
integrity tests - Test 25i: Alien crosstalk

1)
IEC 60603-7 – Connectors for electronic equipment - EN 60603-7 2009
Part 7: Detail specification for 8-way,
unshielded, free and fixed connectors

IEC 60603-7-X Series Connectors for electronic equipment - EN 60603-7-X Series
Part 7-X: Detail specification for 8-way,
shielded free and fixed connectors

1) 3)
IEC 60603-7-4 – Connectors for electronic equipment - EN 60603-7-4 200X
Part 7-4: Detail specification for 8-way,
unshielded, free and fixed connectors, for data
transmissions with frequencies up to 250 MHz

1)
IEC 60603-7-5 – Connectors for electronic equipment - EN 60603-7-5 2009
Part 7-5: Detail specification for 8-way,
shielded, free and fixed connectors, for data
transmissions with frequencies up to 250 MHz

1)
Undated reference.
2)
Valid edition at date of issue.
3)
To be published
Publication Year Title EN/HD Year

1) 2)
IEC 61076-3-104 – Connectors for electronic equipment - EN 61076-3-104 2006
Product requirements -
Part 3-104: Detail specification for 8-way,
shielded free and fixed connectors
for data transmissions with frequencies up to
1 000 MHz
1) 2)
IEC 61076-3-110 – Connectors for electronic equipment - EN 61076-3-110 2008
Product requirements -
Part 3-110: Rectangular connectors -
Detail specification for shielded, free and fixed
connectors for data transmission with
frequencies up to 1 000 MHz
1)
IEC 61156-1 – Multicore and symmetrical pair/quad cables – –
for digital communications -
Part 1: Generic specification
1)
IEC 61156-5 – Multicore and symmetrical pair/quad cables – –
for digital communications -
Part 5: Symmetrical pair/quad cables with
transmission characteristics up to 1 000 MHz -
Horizontal floor wiring - Sectional specification

1)
IEC 61156-6 – Multicore and symmetrical pair/quad cables – –
for digital communications -
Part 6: Symmetrical pair/quad cables with
transmission characteristics up to 1 000 MHz -
Work area wiring - Sectional specification

1)
IEC 61156-7 – Multicore and symmetrical pair/quad cables – –
for digital communications -
Part 7: Symmetrical pair cables with
transmission characteristics up to 1 200 MHz -
Sectional specification for digital and analog
communication cables
1)
IEC 61156-8 – Multicore and symmetrical pair/quad cables – –
for digital communications -
Part 8: Symmetrical pair/quad cables with
transmission characteristics up to 1 200 MHz -
Work area wiring - Sectional specification

ITU-T 1996 Transmission aspects of unbalance about – –
Recommendation earth
G.117
ITU-T 1999 Measuring arrangements to assess the – –
Recommendation degree of unbalance about earth
O.9
IEC 61935-1 ®
Edition 3.0 2009-07
INTERNATIONAL
STANDARD
Specification for the testing of balanced and coaxial information technology
cabling –
Part 1: Installed balanced cabling as specified in ISO/IEC 11801 and related
standards
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XE
ICS 33.120.10 ISBN 2-8318-1051-8
– 2 – 61935-1 © IEC:2009(E)
CONTENTS
FOREWORD.8
INTRODUCTION.10
1 Scope.11
2 Normative references .12
3 Terms and definitions .13
4 Reference measurement procedures for electrical properties .15
4.1 General .15
4.2 Test equipment considerations .15
4.2.1 General .15
4.2.2 Network analyzer test requirements.15
4.2.3 Termination of conductor pairs .16
4.2.4 Reference loads for calibration .17
4.2.5 Test configurations .17
4.2.6 Coaxial cables and test leads for network analyzers .18
4.2.7 Balun requirements .19
4.2.8 Network analyzer measurement precautions.20
4.2.9 Data reporting and accuracy.21
4.3 DC loop resistance .21
4.3.1 Objective .21
4.3.2 Test method .22
4.3.3 Test equipment and set-up .22
4.3.4 Procedure.22
4.3.5 Test report.22
4.3.6 Uncertainty.23
4.4 Direct current (d.c.) resistance unbalance .23
4.4.1 Objective .23
4.4.2 Test method .23
4.4.3 Test equipment and set-up .23
4.4.4 Procedure.23
4.4.5 Test report.24
4.4.6 Uncertainty.24
4.5 Insertion loss.24
4.5.1 Objective .24
4.5.2 Test method .24
4.5.3 Test equipment and set-up .25
4.5.4 Procedure.25
4.5.5 Test report.26
4.5.6 Temperature correction .26
4.5.7 Uncertainty.26
4.6 Propagation delay and delay skew .26
4.6.1 Objective .26
4.6.2 Test method .26
4.6.3 Test equipment and set-up .27
4.6.4 Procedure.27
4.6.5 Test report.27
4.6.6 Uncertainty.27

61935-1 © IEC:2009(E) – 3 –
4.7 Near-end cross-talk (NEXT) and power sum NEXT.28
4.7.1 Objective .28
4.7.2 Test method .28
4.7.3 Test equipment and set-up .28
4.7.4 Procedure.28
4.7.5 Test report.29
4.7.6 Uncertainty.30
4.8 Attenuation to crosstalk ratio, near end (ACR-N) and power sum ACR-N.30
4.8.1 Objective .30
4.8.2 Test method .30
4.8.3 Test equipment and set-up .30
4.8.4 Procedure.30
4.8.5 Test report.30
4.8.6 Uncertainty.30
4.9 Far-end cross-talk (FEXT) and power sum FEXT.31
4.9.1 Objective .31
4.9.2 Test method .31
4.9.3 Test equipment and set-up .31
4.9.4 Procedure.32
4.9.5 Test report.32
4.9.6 Uncertainty of FEXT measurements .32
4.10 Equal level far end crosstalk (ELFEXT) and attenuation to crosstalk ratio, far
end (ACR-F).32
4.10.1 Objective .32
4.10.2 Calculation .33
4.10.3 Test report.33
4.10.4 Uncertainty.33
4.11 Return loss.33
4.11.1 Objective .33
4.11.2 Test method .33
4.11.3 Test equipment and set-up .34
4.11.4 Procedure.34
4.11.5 Test report.35
4.11.6 Uncertainty.35
4.12 PS alien near end crosstalk (PS ANEXT – Exogenous crosstalk).35
4.12.1 Objective .35
4.12.2 Test method .35
4.12.3 Test equipment and set-up .35
4.12.4 Procedure.36
4.13 PS attenuation to alien crosstalk ratio, far end crosstalk (PS AACR-F –
Exogenous crosstalk) .38
4.13.1 Objective .38
4.13.2 Test method .38
4.13.3 Test equipment and set-up .38
4.13.4 Procedure.40
4.14 Unbalance attenuation, near end.42
4.14.1 Objective .42
4.14.2 Test method .42
4.14.3 Test equipment and set-up .42

– 4 – 61935-1 © IEC:2009(E)
4.14.4 Procedure.43
4.14.5 Test report.45
4.14.6 Uncertainty.46
4.15 Unbalance attenuation, far end.46
4.15.1 Objective .46
4.15.2 Test method .46
4.15.3 Test equipment and set-up .46
4.15.4 Procedure.47
4.15.5 Test report.48
4.15.6 Uncertainty.48
4.16 Coupling attenuation .48
5 Field test measurement requirements for electrical properties .48
5.1 General .48
5.2 Cabling configurations tested .49
5.3 Field test parameters.49
5.3.1 General .49
5.3.2 Inspection of workmanship and connectivity testing .50
5.3.3 Propagation delay and delay skew.51
5.3.4 Length .51
5.3.5 Insertion loss.52
5.3.6 NEXT, power sum NEXT.52
5.3.7 ACR-N and power sum ACR-N .53
5.3.8 ELFEXT, power sum ELFEXT, ACR-F, power sum ACR-F .54
5.3.9 Return loss .55
5.3.10 Direct current (d.c.) loop resistance .55
5.4 Power sum alien crosstalk .55
5.4.1 Objective .55
5.4.2 Test method .56
5.4.3 Test equipment and set-up .56
5.4.4 Measuring ANEXT loss.56
5.4.5 Measuring AFEXT loss .57
5.4.6 Procedure.57
5.4.7 Calculation of PS ANEXT and PS AACR-F from measured data .57
5.4.8 Selection of test ports.60
5.4.9 Test report.62
5.4.10 Uncertainty of PS alien crosstalk measurements .62
5.5 Data reporting and accuracy.62
5.5.1 General .62
5.5.2 Detailed results .64
5.5.3 Summary results.64
5.5.4 Reporting requirements for power sum alien crosstalk .68
5.5.5 General .68
5.5.6 Consistency checks for field testers.68
5.5.7 Evaluation of consistency tests.69
5.5.8 Administration system applicability .69
5.5.9 Test equipment adapter cords for link testing.69
5.5.10 User cords and channel testing.69
6 Field tester measurement accuracy requirements .69
6.1 General .69

61935-1 © IEC:2009(E) – 5 –
6.2 Measurement accuracy specifications common to level IIE, level III, level
IIIE, and level IV field testers.73
6.3 Accuracy performance requirements for level IIE field testers.73
6.4 Accuracy performance requirements for level III field testers .75
6.5 Accuracy performance requirements for level IIIE field testers.77
6.6 Accuracy performance requirements for level IV field testers.79
6.7 Accuracy performance requirements for level IV field testers over 600 MHz .81
6.8 Field tester requirements applicable to alien crosstalk measurements .81
6.9 Procedures for determining field tester parameters .81
6.9.1 General .81
6.9.2 Output signal balance (OSB) .82
6.9.3 Common mode rejection (CMR) .82
6.9.4 Residual NEXT .83
6.9.5 Dynamic accuracy .84
6.9.6 Source/load return loss.85
6.9.7 Random noise floor .85
6.9.8 Residual FEXT .85
6.9.9 Directivity .86
6.9.10 Tracking .87
6.9.11 Source match .87
6.9.12 Return loss of remote termination .87
6.9.13 Constant error term of the propagation delay measurement function.88
6.9.14 Error constant term proportional to propagation delay of the
propagation delay measurement function.88
6.9.15 Constant error term of the delay skew measurement function .88
6.9.16 Constant error term of the length measurement function.88
6.9.17 Error constant proportional to length of the length measurement
function .88
6.9.18 Constant error term of the d.c. resistance measurement function.88
6.9.19 Error constant term proportional to d.c. resistance of the d.c.
resistance measurement function .89
6.9.20 Measurement floor for alien crosstalk testing during field testing .89
6.9.21 Measurement floor of the test device for the channel test
configuration .89
6.10 Measurement error models.90
6.10.1 General .90
6.10.2 Error model for the insertion loss measurement function .90
6.10.3 Error model for the NEXT measurement function.91
6.10.4 Error model for the power sum NEXT measurement function.91
6.10.5 Error model for the ACR-N measurement function .91
6.10.6 Error model for the power sum ACR-N measurement function .92
6.10.7 Error model for the ELFEXT or ACR-F measurement function .92
6.10.8 Error model for the power sum ELFEXT and PS ACR-F
measurement functions .93
6.10.9 Error model for the return loss measurement function .93
6.10.10 Error model for the propagation delay measurement function .94
6.10.11 Error model for the delay skew measurement function.95
6.10.12 Error model for the length measurement function .95
6.10.13 Error model for the d.c. loop resistance measurement function.95
6.11 Network analyzer measurement comparisons .95

– 6 – 61935-1 © IEC:2009(E)
6.11.1 General .95
6.11.2 Adapters.95
6.11.3 Comparison methods.98
Annex A (informative) Uncertainty and variability of field test results.102
Annex B (normative) Reference laboratory test configuration for alien crosstalk testing .106
Annex C (informative) General information on power sum alien crosstalk performance
of installations .109
Bibliography.110

Figure 1 – Resistor load.16
Figure 2 – Reference planes for permanent link and channel .18
Figure 3 – 180° hybrid used as a balun.19
Figure 4 – Loop resistance measurement .22
Figure 5 – DC resistance unbalance measurement .24
Figure 6 – Insertion loss test configuration.25
Figure 7 – NEXT test configuration .28
Figure 8 – FEXT test configuration.31
Figure 9 – Return loss test configuration.34
Figure 10 – ANEXT measurement.36
Figure 11 – Alien far end crosstalk measurement.39
Figure 12 – Unbalance attenuation, near end test configuration .43
Figure 13 – Back-to-back balun differential mode insertion loss measurement .44
Figure 14 – Back-to-back balun common mode insertion loss measurement .44
Figure 15 – Unbalance performance test of the measurement balun .45
Figure 16 – Unbalance attenuation far end test configuration.47
Figure 17 – Correct pairing .50
Figure 18 – Incorrect pairing .51
Figure 19 – Schematic diagram to measure channel ANEXT loss .56
Figure 20 – AFEXT loss measurement test configuration .57
Figure 21 – Flow chart of the alien crosstalk test procedure.61
Figure 22 – Example of equipment tolerance region (NEXT) .63
Figure 23 – Block diagram for measuring output signal balance .82
Figure 24 – Block diagram to measure common mode rejection .83
Figure 25 – Block diagram for measuring residual NEXT.84
Figure 26 – Block diagram for measuring dynamic accuracy .84
Figure 27 – Principle of measurement of residual NEXT .86
Figure 28 – Principle of alternate measurement of residual FEXT .86
Figure 29 – Alien crosstalk measurement floor test for the channel test configuration .89
Figure 30 – Alien crosstalk measurement floor test for the link test configurations .90
Figure 31 – Construction details of special patch cord adapter.96
Figure 32 – Interfaces to channel by field test and laboratory equipment to compare
test results.97
Figure 33 – Interfaces to link test configuration by field test and laboratory equipment
to compare test results .98

61935-1 © IEC:2009(E) – 7 –
Figure 34 – Sample scatter plot .100
Figure A.1 – Source of variability during link testing. 103

Table 1 – Test balun performance characteristics .20
Table 2 – Estimated uncertainty of unbalance, near end measurement. .46
Table 3 – Estimated uncertainty of unbalance, far end measurement .48
Table 4 – Summary of reporting requirements for field test equipment .65
Table 5 – Minimum reporting requirement for PS ANEXT and PS AACR-F .68
Table 6 – Worst case propagation delay, delay skew, d.c. resistance and length
measurement accuracy for level IIE, level III and level IV test instruments.70
Table 7 – Worst case insertion loss, NEXT, ACR-N, ELFEXT/ACR-F and return loss
measurement accuracy for level IIE test instruments .71
Table 8 – Worst case insertion loss, NEXT, ACR-N, ELFEXT/ACR-F and return loss
measurement accuracy for level III test instruments.71
Table 9 – Worst case insertion loss, NEXT, ACR-N, ELFEXT/ACR-F and return loss
measurement accuracy for level IIIE test instruments .72
Table 10 – Worst case insertion loss, NEXT, ACR-N, ELFEXT/ACR-F and return loss
measurement accuracy for level IV test instruments.72
Table 11 – Propagation delay, delay skew, d.c. resistance and length accuracy
performance specifications .73
Table 12 – Level IIE field tester accuracy performance parameters per IEC guidelines .74
Table 13 – Level III field tester accuracy performance parameters per IEC guidelines .76
Table 14 – Level IIIE field tester accuracy performance parameters per IEC guidelines .78
Table 15 – Level IV field tester accuracy performance parameters per IEC guidelines .80

– 8 – 61935-1 © IEC:2009(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SPECIFICATION FOR THE TESTING OF BALANCED
AND COAXIAL INFORMATION TECHNOLOGY CABLING –

Part 1: Installed balanced cabling as specified
in ISO/IEC 11801 and related standards

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The objective of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
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members of its technical committees and IEC National Committees for any personal injury, property damage or
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61935-1 has been prepared by IEC technical committee 46:
Cables, wires, waveguides, R.F. connectors, R.F. and microwave passive components and
accessor
...