EN 50289-1-9:2017

SLOVENSKI STANDARD
01-maj-2017
1DGRPHãþD
SIST EN 50289-1-9:2002
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Communication cables - Specifications for test methods - Part 1-9: Electrical test
methods - Unbalance attenuation (transverse conversion loss TCL transverse conversion
transfer loss TCTL)
Kommunikationskabel - Spezifikationen für Prüfverfahren Teil 1-9: Elektrische
Prüfverfahren - Unsymmetriedämpfung (Unsymmetriedämpfung am nahen und am
fernen Ende)
Câbles de communication - Spécifications des méthodes d'essai Partie 1-9: Méthodes
d'essais électriques - Affaiblissement de disymétrie (perte de conversion longitudinale,
perte de transfert de conversion longitudinale)
Ta slovenski standard je istoveten z: EN 50289-1-9:2017
ICS:
33.120.20 äLFHLQVLPHWULþQLNDEOL Wires and symmetrical
cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50289-1-9
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2017
ICS 33.120.20 Supersedes EN 50289-1-9:2001
English Version
Communication cables - Specifications for test methods -
Part 1-9: Electrical test methods - Unbalance attenuation
(transverse conversion loss TCL transverse conversion transfer
loss TCTL)
Câbles de communication - Spécifications des méthodes Kommunikationskabel - Spezifikationen für Prüfverfahren
d'essai Partie 1-9: Méthodes d'essais électriques - Teil 1-9: Elektrische Prüfverfahren - Unsymmetriedämpfung
Affaiblissement de disymétrie (perte de conversion (Unsymmetriedämpfung am nahen und am fernen Ende)
longitudinale, perte de transfert de conversion
longitudinale)
This European Standard was approved by CENELEC on 2016-12-16. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50289-1-9:2017 E
Contents Page
European foreword . 3
1 Scope. 4
2 Normative references . 4
3 Terms and definitions . 4
4 Test method . 5
4.1 Method A: measurement using balun setup . 5
4.1.1 Test equipment . 5
4.1.2 Test sample . 5
4.1.3 Calibration procedure . 6
4.1.4 Measuring procedure . 8
4.1.5 Expression of test results . 10
4.2 Method B: measurement using balun-less setup . 11
4.2.1 Test equipment . 11
4.2.2 Test sample . 11
4.2.3 Calibration procedure . 12
4.2.4 Measuring procedure . 12
4.2.5 Expression of test results . 13
5 Test report . 14
Annex A (informative) General background of unbalance attenuation . 15
A.1 General . 15
A.2 Unbalance attenuation near end and far end . 16
A.3 Theoretical background . 17
Bibliography . 21

European foreword
This document [EN 50289-1-9:2017] has been prepared by CLC/TC 46X “Communication cables”.
The following dates are fixed:
• latest date by which this document has to be implemented (dop) 2017-09-16
at national level by publication of an identical national
standard or by endorsement
• latest date by which the national standards conflicting with (dow) 2019-12-16
this document have to be withdrawn
This document supersedes EN 50289-1-9:2001.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
EN 50289-1, Communication cables — Specifications for test methods, is currently composed with the
following parts:
— Part 1-1: Electrical test methods — General requirements;
— Part 1-2: Electrical test methods — DC resistance;
— Part 1-3: Electrical test methods — Dielectric strength;
— Part 1-4: Electrical test methods — Insulation resistance;
— Part 1-5: Electrical test methods — Capacitance;
— Part 1-6: Electrical test methods — Electromagnetic performance;
— Part 1-7: Electrical test methods — Velocity of propagation;
— Part 1-8: Electrical test methods — Attenuation;
— Part 1-9: Electrical test methods — Unbalance attenuation (transverse conversion loss TCL transverse
conversion transfer loss TCTL);
— Part 1-10: Electrical test methods — Crosstalk;
— Part 1-11: Electrical test methods — Characteristic impedance, input impedance, return loss;
— Part 1-12: Electrical test methods — Inductance;
— Part 1-13: Electrical test methods — Coupling attenuation or screening attenuation of patch cords /
coaxial cable assemblies / pre-connectorised cables;
— Part 1-14: Electrical test methods — Coupling attenuation or screening attenuation of connecting
hardware;
— Part 1-15: Electromagnetic performance — Coupling attenuation of links and channels (Laboratory
conditions);
— Part 1-16: Electromagnetic performance — Coupling attenuation of cable assemblies (Field conditions);
— Part 1-17: Electrical test methods — Exogenous Crosstalk ExNEXT and ExFEXT.
1 Scope
This European Standard details the test methods to determine the attenuation of converted differential-mode
signals into common-mode signals, and vice versa, due to balance characteristics of cables used in analogue
and digital communication systems by using the transmission measurement method. The unbalance
attenuation is measured in, respectively converted to, standard operational conditions. If not otherwise
specified, e.g. by product specifications, the standard operational conditions are a differential-mode which is
matched with its nominal characteristic impedance (e.g. 100 Ω) and a common-mode which is loaded with
50 Ω. The difference between the (image) unbalance attenuation (matched conditions in the differential and
common-mode) to the operational (Betriebs) unbalance attenuation (matched conditions in differential-mode
and 50 Ω reference load in the common-mode) is small provided the common-mode impedance Z is in
com
the range of 25 Ω to 75 Ω.
For cables having a nominal impedance of 100 Ω, the value of the common-mode impedance Z is about
com
75 Ω for up to 25 pair- count unscreened pair cables, 50 Ω for common screened pair cables and more than
25 pair- count unscreened pair cables, and 25 Ω for individually screened pair cables. The impedance of the
common-mode circuit Z can be measured more precisely either with a time domain reflectometer (TDR)
com
or a network analyser. The two conductors of the pair are connected together at both ends and the
impedance is measured between these conductors and the return path.
This European Standard is bound to be read in conjunction with EN 50289-1-1, which contains essential
provisions for its application.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 50289-1-1:2017, Communication cables — Specifications for test methods — Part 1-1: Electrical test
methods — General requirements
EN 50289-1-8, Communication cables - Specifications for test methods - Part 1-8: Electrical test methods -
Attenuation
EN 50290-1-2, Communication cables - Part 1-2: Definitions
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 50290-1-2 and the following apply.
3.1
unbalance attenuation
logarithmic ratio of the differential-mode power (transmission signal of a balanced pair) to the common-mode
power (signal in the pair to ground/earth unbalanced circuit) measured at the near and at the far end
Note 1 to entry: The (operational) unbalance attenuation is described by the logarithmic ratio of the differential-mode
power to the common-mode power in standard operational conditions. If not otherwise specified, e.g. by product
specifications, the standard operational conditions are a differential-mode which is matched with its nominal
characteristic impedance (e.g. 100 Ω) and a common-mode which is loaded with 50 Ω.
 
PZU
diff diff com
 
a= 10×lg = 20×lg +×10 lg (1)
u
 
PZU
com com  diff 
where
Pdiff is the power in the differential-mode (balanced) circuit;
Pcom is the power in the common-mode (unbalanced) circuit;
U is the voltage in the differential-mode (balanced) circuit;
diff
Ucom is the voltage in the common-mode (unbalanced) circuit;
Z is the characteristic impedance of the differential-mode (balanced) circuit;
diff
Zcom is the characteristic impedance of the common-mode (unbalanced) circuit.
3.2
transverse conversion loss
TCL
logarithmic ratio of the differential-mode injected signal at the near end to the resultant common-mode signal
at the near end of a balanced pair, and which is equal to unbalance attenuation at near end when the CUT is
terminated with the same impedances as defined for unbalance attenuation measurement
Note 1 to entry: This definition stems from ITU-G.117.
3.3
transverse conversion transfer loss
TCTL
logarithmic ratio of the differential-mode injected signal at the near end to the resultant common-mode signal
at the far end of a balanced pair, and which is equal to unbalance attenuation at far end when the CUT is
terminated with the same impedances as defined for unbalance attenuation measurement
Note 1 to entry: This definition stems from ITU-G.117.
4 Test method
4.1 Method A: measurement using balun setup
4.1.1 Test equipment
a) It is mandatory to create a defined return (common-mode) path. This is achieved by grounding all other
pairs and screen(s) if present in common to the balun ground. However in addition in the case of
unscreened cables the cable under test shall be wound onto a grounded metal drum. The drum surface
may have a suitable groove, wide enough to contain the cable, and shall be adequate to hold 100 m of
cable in one layer. The pair under test shall be terminated with differential-mode and common-mode
terminations and grounded at near and far ends
b) A network analyser or generator/receiver combination suitable for the required frequency and dynamic
range.
c) The baluns shall have a common-mode port and the characteristics given in EN 50289-1-1:2017,
Table 1.
d) Time domain reflectometer (optional).
4.1.2 Test sample
The ends of the cable under test (CUT) shall be prepared so that the twisting of the pairs/quads is maintained
up to the terminals of the test equipment. If not otherwise specified the CUT shall have a length of
100 m ± 1 m. Fo
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