SIST EN 61935-1:2006
(Main)Testing of balanced communication cabling in accordance with standards series EN 50173 -- Part 1: Installed cabling
Testing of balanced communication cabling in accordance with standards series EN 50173 -- Part 1: Installed cabling
Specifies reference measurement procedures for cabling parameters and the requirements for field tester accuracy to measure cabling parameters identified in ISO/IEC 11801. References in this standard to ISO/IEC 11801 mean ISO/IEC 11801 or equivalent cabling standards.
Prüfung der symmetrischen Kommunikationsverkabelung nach der Normenreihe EN 50173 -- Teil 1: Installierte Verkabelung
Essais de câblages de télécommunications symétriques selon la série de normes EN 50173 -- Partie 1: Câblages installés
spécifie les procédures des mesures de référence pour les paramètres de câblage et les exigences pour la précision des appareils de contrôle sur le terrain pour mesurer les paramètres de câblage identifiés dans l'ISO/IEC 11801. Les références faites dans la présente norme à l'ISO/IEC 11801 renvoient à la norme ISO/IEC 11801 ou à des normes de câblage équivalentes.
Preskušanje urejenega kabliranja za komunikacije v skladu s standardom EN 50173 – 1. del: Kabelska inštalacija (IEC 61935-1:2005, spremenjen)
General Information
Relations
Standards Content (Sample)
SLOVENSKI SIST EN 61935-1:2006
STANDARD
marec 2006
Preskušanje urejenega kabliranja za komunikacije v skladu s standardom EN
50173 – 1. del: Kabelska inštalacija (IEC 61935-1:2005, spremenjen)
Testing of balanced communication cabling in accordance with standards series
EN 50173 - Part 1: Installed cabling (IEC 61935-1:2005, modified)
ICS 33.120.10 Referenčna številka
SIST EN 61935-1:2006(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
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EUROPEAN STANDARD EN 61935-1
NORME EUROPÉENNE
EUROPÄISCHE NORM December 2005
ICS 33.120.10 Supersedes EN 61935-1:2000 + A1:2002
English version
Testing of balanced communication cabling
in accordance with standards series EN 50173
Part 1: Installed cabling
(IEC 61935-1:2005, modified)
Essais de câblages de Prüfung der symmetrischen
télécommunications symétriques Kommunikationsverkabelung
selon la série de normes EN 50173 nach der Normenreihe EN 50173
Partie 1: Câblages installés Teil 1: Installierte Verkabelung
(CEI 61935-1:2005, modifiée) (IEC 61935-1:2005, modifiziert)
This European Standard was approved by CENELEC on 2005-10-01. 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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61935-1:2005 E
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EN 61935-1:2005 - 2 -
Foreword
The text of document 46A/717/FDIS, future edition 2 of IEC 61935-1, prepared by SC 46A, Coaxial
cables, of 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 2005-10-01.
This European Standard supersedes EN 61935-1:2000 + corrigendum February 2001 + A1:2002.
This new edition was written to describe Level IV testers in support of ISO/IEC 11801:2002 and the series
EN 50173.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2006-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2008-10-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61935-1:2005 was approved by CENELEC as a European
Standard with agreed common modifications as given below.
COMMON MODIFICATIONS
Title page
Replace "ISO/IEC 11801" by "standards series EN 50173".
General
Replace all other occurrences of "ISO/IEC 11801" and "ISO/IEC 11801 (or equivalent)" by "EN 50173".
This replacement is to be made in the introduction and in (Sub)Clauses 3, 3.1, 4.2.4 (twice), 5.1 (four
times), 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, 5.5.1, 6.2 and 6.8.1.
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 EN 50173.
Clause 2, Normative references
Add:
EN 50173, series, Information technology - Generic cabling systems
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- 3 - EN 61935-1:2005
Clause 3, Terms and definitions
Replace definitions 3.2 and 3.3 by:
3.2
reflection coefficient
ratio of the voltage of the reflected wave to the voltage of the incident wave at the port or transverse
cross-section to a cable assembly when the cable assembly is terminated with its application or nominal
impedances, Z .
cnom
ZZ−
cnom in
C = (1)
r
ZZ+
cnom in
3.3
return loss
ratio in decibels of the voltage delivered to a cable assembly terminated at the far end with its nominal
characteristic impedance, to the reflected voltage at the input port of the cable assembly.
u
i
R = 20log
l
u
r
or
ZZ+
cnom in
R = 20log (2)
l
ZZ−
cnom in
where
u is the incident voltage;
i
u is the reflected voltage.
r
___________
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EN 61935-1:2005 - 4 -
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 Where 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 systems EN 50173 Series
1)
IEC 60169-16 – Radio-frequency connectors – –
Part 16: R.F. coaxial connectors with inner
diameter of outer conductor 7 mm (0,276 in)
with screw coupling - Characteristic impedance
50 ohms (75 ohms) (Type N)
1)
IEC 60169-22 – Part 22: R.F. two-pole bayonet coupled – -
connectors for use with shielded balanced cables
having twin inner conductors (Type BNO)
IEC 60603-7 1996 Connectors for frequencies below 3 MHz for use EN 60603-7 1997
with printed boards
Part 7: Detail specification for connectors, 8-way,
including fixed and free connectors with common
mating features, with assessed quality
1) 2)
IEC 61076-3-104 – Connectors for electronic equipment EN 61076-3-104 2003
Part 3-104: Rectangular connectors - Detail
specification for 8-way, shielded free and fixed
connectors for data transmissions with
frequencies up to 600 MHz minimum
3) 1)
ISO/IEC 14763-1 – Information technology – Implementation and – –
operation of customer premises cabling
Part 1: Administration
ITU-T Rec. G.117 1996 Transmission aspects of unbalance about earth – –
ITU-T Rec. O.9 1988 Measuring arrangements to assess the degree of – –
unbalance about earth
1)
Undated reference.
2)
Valid edition at date of issue.
3)
EN 50174-1, Information technology - Cabling installation -- Part 1: Specification and quality assurance, which is related to, but
not directly equivalent with ISO/IEC 14763-1, applies instead.
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NORME CEI
INTERNATIONALE
IEC
61935-1
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2005-08
Essais de câblages de télécommunications
symétriques selon l'ISO/IEC 11801 –
Partie 1:
Câblages installés
Testing of balanced communication
cabling in accordance with ISO/IEC 11801 –
Part 1:
Installed cabling
IEC 2005 Droits de reproduction réservés Copyright - all rights reserved
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utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
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Pour prix, voir catalogue en vigueur
For price, see current catalogue
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61935-1 IEC:2005 – 3 –
CONTENTS
FOREWORD.7
INTRODUCTION.11
1 Scope.13
2 Normative references .13
3 Terms and definitions .15
4 Reference measurement procedures for electrical properties .21
4.1 General .21
4.2 Test equipment considerations .21
4.3 DC loop resistance .33
4.4 Direct current (d.c.) resistance unbalance .35
4.5 Insertion loss.39
4.6 Propagation delay and delay skew .41
4.7 Near-end crosstalk (NEXT), pair to pair and power sum .45
4.8 Attenuation to crosstalk ratio (ACR), pair to pair and power sum .49
4.9 Far-end crosstalk (FEXT), pair to pair and power sum .51
4.10 Equal level far-end crosstalk (ELFEXT) .57
4.11 Return loss.57
4.12 Unbalance attenuation.61
4.13 Coupling attenuation .61
5 Field test measurement requirements for electrical properties .61
5.1 General .61
5.2 Cabling configurations tested .63
5.3 Field test parameters.63
5.4 Data reporting and accuracy.75
5.5 Field measurement procedures .87
6 Field tester measurement accuracy requirements .89
6.1 General .89
6.2 Measurement accuracy specifications common to level IIE, level III and
level IV field testers.93
6.3 Accuracy performance requirements for level IIE field testers.93
6.4 Accuracy performance requirements for level III field testers .97
6.5 Accuracy performance requirements for level IV field testers.101
6.6 Procedures for determining field tester parameters .105
6.7 Measurement error models.121
6.8 Network analyser measurement comparisons .133
Bibliography.147
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61935-1 IEC:2005 – 5 –
Figure 1 – Resistor load.23
Figure 2 – Reference planes for permanent link and channel .25
Figure 3 – 180° hybrid used as a balun.27
Figure 4 – Loop resistance measurement .35
Figure 5 – DC resistance unbalance measurement (test configuration for one wire).37
Figure 6 – Insertion loss test configuration.39
Figure 7 – NEXT test configuration .47
Figure 8 – FEXT test configuration.53
Figure 9 – Return loss test configuration.59
Figure 10 – Correct pairing .65
Figure 11 – Incorrect pairing .65
Figure 12 – Example of equipment tolerance region (NEXT) .75
Figure 13 – Block diagram for measuring output signal balance .107
Figure 14 – Block diagram to measure common mode rejection .109
Figure 15 – Block diagram for measuring residual NEXT.111
Figure 16 – Block diagram for measuring dynamic accuracy .111
Figure 17 – Principle of measurement of residual NEXT .115
Figure 18 – Principle of alternate measurement of residual FEXT .115
Figure 19 – Construction details of special patch cord adapter.135
Figure 20 – Interfaces to channel by field test and laboratory equipment to compare
test results.137
Figure 21 – Interfaces to link test configuration by field test and laboratory equipment
to compare test results .139
Figure 22 – Sample scatter plot .143
Table 1 – Test balun performance characteristics .29
Table 2 – Summary of reporting requirements for field test equipment .79
Table 3 – Worst case propagation delay, delay skew, d.c. resistance and length
measurement accuracy for level IIE, level III and level IV test instruments.91
Table 4 – Worst case insertion loss, NEXT, ACR, ELFEXT and return loss
measurement accuracy for level IIE field test instruments .91
Table 5 – Worst case measurement insertion loss, NEXT, ACR, ELFEXT and return
loss for level III test instruments .91
Table 6 – Worst case insertion loss, NEXT, ACR, ELFEXT and return loss
measurement for level IV test instruments .93
Table 7 – Propagation delay, delay skew, DC resistance and length accuracy
performance specifications .93
Table 8 – Level IIE field tester accuracy performance parameters per IEC guidelines .95
Table 9 – Level III field tester accuracy performance parameters per IEC guidelines .99
Table 10 – Level IV field tester accuracy performance parameters per IEC guidelines .103
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61935-1 IEC:2005 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
TESTING OF BALANCED COMMUNICATION
CABLING IN ACCORDANCE WITH ISO/IEC 11801 –
Part 1: Installed cabling
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object 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,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
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-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
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.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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 subcommittee 46A: Coaxial cables,
of IEC technical committee 46: Cables, wires, waveguides, r.f. connectors, r.f. and microwave
passive components and accessories.
This second edition cancels and replaces the first edition published in 2000 and amendment 1
(2002). It constitutes a technical revision.
This second edition was written to describe Level IV testers in support of the second edition
of ISO/IEC 11801.
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61935-1 IEC:2005 – 9 –
The text of this standard is based on the following documents:
FDIS Report on voting
46A/717/FDIS 46A/734/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
IEC 61935 consists of the following parts, under the general title Testing of balanced
communication cabling in accordance with ISO/IEC 11801:
Part 1: Installed cabling
Part 2: Patch cords and work area cords
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site 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.
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61935-1 IEC:2005 – 11 –
INTRODUCTION
Telecommunication cabling, once specified uniquely by each telecommunications application,
has evolved into a generic cabling system. Telecommunications applications now use the
ISO/IEC 11801 cabling standard to meet their cabling requirements. Formerly, connectivity
tests and visual inspection were deemed sufficient to verify a cabling installation. Now users
need more comprehensive testing in order to ensure that the link will support
telecommunications applications that are designed to operate on the generic cabling system.
This part of IEC 61935 addresses reference laboratory and field test methods and provides a
comparison of these methods.
Transmission performance depends on cable characteristics, connecting hardware, patch
cords and cross-connect cabling, the total number of connections, and the care with which
they are installed and maintained. This standard provides test methods for installed cabling
and pre-fabricated cable assemblies. These test methods, where appropriate, are based on
those used for components of the cable assembly.
This part 1 contains the test methods required for installed cabling. Part 2 contains the test
methods required for patch cords and work area cords.
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61935-1 IEC:2005 – 13 –
TESTING OF BALANCED COMMUNICATION
CABLING IN ACCORDANCE WITH ISO/IEC 11801 –
Part 1: Installed cabling
1 Scope
This part of IEC 61935 specifies reference measurement procedures for cabling parameters
and the requirements for field tester accuracy to measure cabling parameters identified in
ISO/IEC 11801. References in this standard to ISO/IEC 11801 mean ISO/IEC 11801 or
equivalent cabling standards.
This standard applies when the cable assemblies are constructed of cables complying with
IEC 61156 -1, IEC 61156-2, IEC 61156-3 IEC 61156-4, IEC 61156-5 or IEC 61156-6, and
connecting hardware as specified in IEC 60603-7 or IEC 61076-3-104. In the case where
cables and/or connectors do not comply with these standards then additional tests may be
required.
This standard is organized as follows:
• reference laboratory measurement procedures are specified in Clause 4. In some cases,
these procedures may be used in the field;
• descriptions and requirements for measurements in the field are specified in Clause 5;
• performance requirements for field testers and procedures to verify performance are
specified in Clause 6.
NOTE 1 This standard does not include tests that are normally performed on the cables and connectors
separately. These tests are described in IEC 61156-1 and IEC 60603-7 or IEC 61076-3-104 respectively.
NOTE 2 Wherever possible, cables and connectors used in cable assemblies, even if they are not described in
IEC 61156 or IEC 60603-7/IEC 61076-3-104 shall be tested separately according to the tests given in the relevant
generic specification. In this case, most of the environmental and mechanical tests described in this standard may
be omitted.
NOTE 3 Users of this standard are advised to consult with applications standards, equipment manufacturers and
system integrators to determine the suitability of these requirements for specific networking applications
This standard relates to performance with respect to 100 Ω cabling. For 120 Ω or 150 Ω
cabling, the same principles apply but the measurement system should correspond to the
nominal impedance level.
2 Normative references
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.
IEC 60169-16, Radio-frequency connectors – Part 16: R.F. coaxial connectors with inner
diameter of outer conductor 7 mm (0.276 in) with screw coupling – Characteristic impedance
50 ohms (75 ohms) (Type N)
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61935-1 IEC:2005 – 15 –
IEC 60169-22, Radio-frequency connectors – Part 22: RF two-pole bayonet coupled
connectors for use with shielded balanced cables having twin inner conductors (Type BNO)
IEC 60603-7:1996 Connectors for frequencies below 3 MHz for use with printed boards –
Part 7: Detail specification for connectors, 8-way, including fixed and free connectors with
common mating features, with assessed quality
IEC 61076-3-104, Connectors for electronic equipment – Part 3-104: Rectangular connectors
– Detail specification for 8-way, shielded free and fixed connectors for data transmissions with
frequencies up to 600 MHz minimum
ISO/IEC 11801, Information technology – Generic cabling for customer premises
ISO/IEC 14763-1, Information technology – Implementation and operation of customer
premises cabling – Part 1: Administration
ITU-T Recommendation G.117:1996, Transmission aspects of unbalance about earth
ITU-T Recommendation O.9:1999, Measuring arrangements to assess the degree of
unbalance about earth
3 Terms and definitions
For the purposes of this document, the terms and definitions in IS0/IEC 11801 and the
following apply.
3.1
cable assembly
combination of cable(s) and connector(s) with specified performance, used as a single unit
intended to be a part of a cabling link as defined in ISO/IEC 11801 (or equivalent).
Examples: patch cord, work area cord, link
3.2
reflection coefficient
ratio of the complex square root of wave amplitude of the reflected wave to the complex
square root of wave amplitude of the incident wave at a port or transverse cross-section of a
cable assembly when the cable assembly is terminated with its application or nominal
impedances, Z
nom
| Z +Z |
in cnom
C = (1)
r
| Z −Z |
in cnom
3.3
return loss
ratio of the power delivered to a cable assembly terminated at the far end with its nominal
characteristic impedance, to the reflected power at the input port of the cable assembly
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61935-1 IEC:2005 – 17 –
u
i
R =20 log
l
u
r
| Z −Z |
in cnom
or R =20 log (2)
l
| Z +Z |
in cnom
where
u is the incident voltage;
i
u is the reflection voltage.
r
3.4
electrical length
equivalent free-space length of the cable assembly
3.5
propagation delay
phase delay at each frequency in the frequency range of interest for the propagation of a
transverse electromagnetic mode (TEM) wave between the reference planes of the cable
assembly, expressed in nanoseconds per metre (ns/m)
3.6
minimum static bending radius
radius used in climatic tests which is the minimum permissible for fixed installations of the
cable
3.7
dynamic bending radius
bending radius used for the insertion loss stability, stability of electrical length and flexing
endurance tests. It is the minimum bending radius for applications where the cable assembly
is flexed. Larger bending radii will allow an increase in the maximum number of flexures
3.8
screening attenuation (of the cable assembly)
ratio of the common mode square root of power wave inside a screened cable assembly to the
total square root of power that radiates outside the cable assembly
3.9
unbalanced attenuation
ratio of the common mode square root of signal power to the differential mode square root of
signal power in a pair due to unbalanced properties of the g
...
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