EN 50289-1-8:2017

SLOVENSKI STANDARD
01-maj-2017
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SIST EN 50289-1-8:2002
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Communication cables - Specifications for test methods - Part 1-8: Electrical test
methods - Attenuation
Kommunikationskabel - Spezifikationen für Prüfverfahren Teil 1-8: Elektrische
Prüfverfahren - Dämpfung
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Ta slovenski standard je istoveten z: EN 50289-1-8:2017
ICS:
19.080 (OHNWULþQRLQHOHNWURQVNR Electrical and electronic
SUHVNXãDQMH testing
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 50289-1-8

NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2017
ICS 33.120.20 Supersedes EN 50289-1-8:2001
English Version
Communication cables - Specifications for test methods - Part 1-
8: Electrical test methods - Attenuation
Câbles de communication - Spécifications des méthodes Kommunikationskabel - Spezifikationen für Prüfverfahren
d'essai Partie 1-8: Méthodes d¿essais électriques - Teil 1-8: Elektrische Prüfverfahren - Dämpfung
Affaiblissement
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 50289-1-8:2017 E
EN 50298-1-8:2017
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Test method for attenuation . 5
4.1 Method A: Balun-based test method for symmetrical cables . 5
4.1.1 Test equipment . 5
4.1.2 Test sample . 5
4.1.3 Calibration procedure . 5
4.1.4 Measuring procedure . 5
4.2 Method B: Balun-less test method for symmetrical cables . 6
4.2.1 Test equipment . 6
4.2.2 Test sample . 7
4.2.3 Calibration procedure . 7
4.2.4 Measuring procedure . 7
4.3 Method C: Test method for coaxial cables . 8
4.3.1 Test equipment . 8
4.3.2 Test sample . 9
4.3.3 Calibration procedure . 9
4.3.4 Measuring procedure . 9
4.4 Method D: Open/short method . 9
4.4.1 Test equipment . 9
4.4.2 Test sample . 9
4.4.3 Calibration procedure . 9
4.4.4 Measuring procedure . 10
5 Expression of test results . 10
5.1 Expression . 10
5.2 Temperature correction . 11
6 Test report . 11
Bibliography . 12

EN 50298-1-8:2017
European foreword
This document [EN 50289-1-8:2017] has been prepared by CLC/TC 46X "Communication cables".
The following dates are fixed:
• latest date by which this document has to be (dop) 2017-09-16
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards conflicting (dow) 2019-12-16
with this document have to be withdrawn
This document supersedes EN 50289-1-8:2001.
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 (longitudinal conversion loss, longitudinal
conversion transfer loss);
— 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.

EN 50298-1-8:2017
1 Scope
This European Standard details the test methods to determine attenuation of finished cables used in analogue
and digital communication systems.
It 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, Communication cables - Specifications for test methods - Part 1-1: Electrical test methods -
General requirements
EN 50289-1-11, Communication cables - Specifications for test methods - Part 1-11: Electrical test methods -
Characteristic impedance, input impedance, return loss
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 50289-1-1 and EN 50290-1-2 and
the following apply.
3.1
cable attenuation
decrease in magnitude of power of a signal that propagates along the cable
3.2
insertion loss (IL) of a network (e.g. cable or cable assembly)
ratio of power P delivered to a specified load in a transmission system, before insertion of the given network,
to the power P delivered to the same load after insertion of the network:
 
P
IL 10⋅ log  dB (1)
( )
 
P
 2
Note 1 to entry: The insertion loss of a network depends on the network itself as well as the transmission system in
which it is inserted (including the load). The insertion loss is generally expressed in decibels.
Note 2 to entry: In a transmission system where the load and source impedances are equal, the insertion loss can be
S
expressed by the scattering parameter .:
IL= −⋅20 log S dB (2)
( )
( )
Note 3 to entry: For a cable which is matched to the transmission system in which it is inserted, the insertion loss is
equivalent to the cable attenuation.
Note 4 to entry: Further information on definitions of attenuation can be found in IEC/TR 62152.
=
EN 50298-1-8:2017
4 Test method for attenuation
4.1 Method A: Balun-based test method for symmetrical cables
4.1.1 Test equipment
The test equipment consists of a vector network analyser (VNA) having at least 2 ports, and the following:
— S-parameter set-up (shall be capable of performing S measurements).
— Baluns to convert the unbalanced signal of the VNA to a balanced signal. The baluns shall have an
impedance on the primary (unbalanced) side equal to the nominal impedance of the measuring devices
(in general 50 Ω) and on the secondary (balanced) side equal to the nominal impedance of the cable
under test (CUT) (e.g. 100 Ω). The baluns shall fulfil the requirements of Class A baluns as described in
EN 50289-1-1.
— Calibration artefacts to perform the required calibration of the test equipment on the secondary side of the
baluns. To perform a full 2-port calibration a short circuit, an open circuit, a reference load, and a short
connection cable or similar, are required. The short circuit shall have negligible inductance and the open
circuit shall have negligible capacitance. The load resistor shall have a value close (within 1%) to the
nominal impedance of the CUT (e.g. 100 Ω) and with negligible inductance and capacitance. The
connection cable shall be as short as possible and well matched to the nominal impedance.
— Resistor termination networks (RTN) for termination of inactive pairs. The resistor termination network
shall provide the differential mode and the common mode reference termination impedances. It is
recommended to use resistor termination networks in accordance with Annex C of EN 50289-1-11.
Baluns may be used for termination of the inactive pairs if they provide the specified differential and
common mode terminations.
As an alternative to a network analyser, a generator and vector voltmeter may be used.
Accuracy of test set-up shall be better than 1 %.
4.1.2 Test sample
The CUT shall have a minimum length as specified in the relevant sectional specification. Both ends of the
CUT shall be prepared, such that when connected to the terminals of the test equipment the influence to the
test result is minimized. The twisting of the pairs/quads shall be maintained.
4.1.3 Calibration procedure
It is not the intent of the standard to detail the algorithms applied by a VNA to correct the measured results
based on a calibration procedure but to detail the calibration procedure. Further information may be obtained
in the manuals of the VNA supplier.
The calibration shall be performed
...