EN 50289-1-14:2004
(Main)Communication cables - Specifications for test methods - Part 1-14: Electrical test methods - Coupling attenuation or screening attenuation of connecting hardware
Communication cables - Specifications for test methods - Part 1-14: Electrical test methods - Coupling attenuation or screening attenuation of connecting hardware
This Part 1-14 of EN 502893 details the method of test to determine the coupling attenuation or screening attenuation for connecting hardwarepatch cords, coaxial cable assemblies and pre-connectorised cables used in analogue and digital communication systems. The test method details means to test one part of a connecting hardware (e. g. wall outlet or plug alone) as well as testing a mated pair of connecting hardware. It is to be read in conjunction with EN 50289-1-6.
Kommunikationskabel - Spezifikationen für Prüfverfahren - Teil 1-14: Elektrische Prüfverfahren - Kopplungsdämpfung oder Schirmdämpfung für Verbindungstechnik
Câbles de communication - Spécifications des méthodes d'essai - Partie 1-14: Méthodes d'essais électriques - Affaiblissement de couplage ou affaiblissement de blindage du matériel de connexion
Komunikacijski kabli – Specifikacije preskusnih metod – 1-14. del: Električne metode preskušanja – Zmanjževanje sklapljanja ali zmanjševanje zaščitenja povezovalnega okovja*
General Information
Standards Content (Sample)
SLOVENSKI SIST EN 50289-1-14:2004
STANDARD
september 2004
Komunikacijski kabli – Specifikacije preskusnih metod – 1-14. del: Električne
metode preskušanja – Zmanjževanje sklapljanja ali zmanjševanje zaščitenja
povezovalnega okovja*
Communication cables - Specifications for test methods - Part 1-14. del: Electrical
test methods - Coupling attenuation or screening attenuation of connecting hardware
ICS 33.120.20 Referenčna številka
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
EUROPEAN STANDARD EN 50289-1-14
NORME EUROPÉENNE
EUROPÄISCHE NORM March 2004
ICS 33.120.10
English version
Communication cables –
Specifications for test methods
Part 1-14: Electrical test methods –
Coupling attenuation or screening attenuation
of connecting hardware
Câbles de communication – Kommunikationskabel –
Spécifications des méthodes d'essai Spezifikationen für Prüfverfahren
Partie 1-14: Méthodes d'essais électriques – Teil 1-14: Elektrische Prüfverfahren -
Affaiblissement de couplage ou Kopplungsdämpfung oder
affaiblissement de blindage du Schirmdämpfung für Verbindungstechnik
matériel de connexion
This European Standard was approved by CENELEC on 2004-02-01. 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
© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50289-1-14:2004 E
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 46X, Communication
cables.
The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC
as EN 50289-1-14 on 2004-02-01.
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) 2005-02-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-02-01
__________
- 3 - EN 50289-1-14:2004
Contents
1 Scope.4
2 Normative references.4
3 Definitions.4
4 Test method.4
4.1 Equipment.4
4.1.1 General.4
4.1.2 Balun requirements .5
4.1.3 Test head and extension cable requirements .6
4.1.3.1 General requirements.6
4.1.3.2 Testing of one part of connecting hardware.6
4.1.3.3 Testing of a mated pair of connecting hardware .7
4.2 Test sample.7
4.2.1 Length of the extension cables.7
4.2.2 Tested length.7
4.2.3 Preparation of extension cable and test head.7
4.2.4.1 Balanced connecting hardware .8
4.2.4.2 Multi-conductor connecting hardware.8
4.2.4.3 Coaxial connecting hardware .8
4.3 Calibration procedure .8
4.4 Test set-up.8
4.4.1 General.8
4.4.2 Test set-up verification .9
4.4.2.1 Determination of measurement sensitivity of the set-up .9
4.4.2.2 Verification of test set-up calibration .10
4.4.2.3 Pulling force on connecting hardware .10
4.5 Measuring procedure.10
5 Expression of test results .10
6 Test report.10
6.1 General.10
6.2 Evaluation of test results (informative) .10
Figure 1 - Measurement of surface wave at near end of connecting hardware .5
Figure 2 - Termination of extension cables .8
Figure 3 - Test set-up for a near end measurement of connecting hardware .9
Figure 4 - Test set-up for a near end measurement of connecting hardware .9
Figure 5 - Typical measurement of screened connecting hardware .11
Figure 6 - Typical measurement of an unscreened balanced connecting hardware.11
Figure 7 - Typical measurement of a screened balanced connecting hardware.12
Table 1 - Balun performance characteristics (30 MHz to 1 GHz).6
1 Scope
This Part 1-14 of EN 50289 details the method of test to determine the coupling attenuation or screening
attenuation for connecting hardware used in analogue and digital communication systems. The test
method details means to test one part of a connecting hardware (e. g. wall outlet or plug alone) as well as
testing a mated pair of connecting hardware. It is to be read in conjunction with EN 50289-1-6.
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.
EN 50289-1-6 Communication cables – Specification for test methods – Part 1-6: Electrical test
methods – Electromagnetic performance
1)
EN 50290-1-2 Communication cables – Part 1-2: Definitions
3 Definitions
For the purposes of this European Standard, the definitions of EN 50290-1-2 and EN 50289-1-6 apply.
In this document connecting hardware is defined as a complete connecting device including compensating
or matching networks (if any), connectors and cable terminations.
4 Test method
4.1 Equipment
4.1.1 General
See EN 50289-1-6, subclause 9.2.1.1 and Figure 1 below.
The connecting hardware under test shall be terminated using the termination method and a cable type for
which it is constructed. If only one part of the connecting hardware is under test, a test head shall be used
to mate the part under test.
1)
Under consideration.
- 5 - EN 50289-1-14:2004
±
600 cm 10 cm
± ±
300 cm 5 cm 300 cm 5 cm
Key
0 signal generator, output impedance Z 8 absorber (ferrite tube) of the clamp,
operational attenuation > 10 dB
1 connecting hardware under test, nominal
characteristic impedance Z 9 absorber (or second clamp), operational
attenuation > 10 dB
2 outer circuit of connecting hardware under test,
impedance Z 10 termination of the far end extension cable
terminating the connecting hardware
3 absorbing clamp, impedance Z
11 shield of signal generator and balun if needed
4 measuring receiver
for high dynamic range
5 balun (if applicable)
12 reflector plate
6 current transformer of the clamp
13 extension cable terminating the connecting
7 measuring receiver cable (use the same in hardware at far end
measurement and calibration)
14 extension cable terminating the test head or
connecting hardware at near end
Figure 1 - Measurement of surface wave at near end of connecting hardware
4.1.2 Balun requirements
For measurement of balanced connecting hardware, a means for generating balanced signals shall be
provided. If the generator is unbalanced, this may be performed by the use of a balun or 180° power
splitter.
The minimum requirements for this device are specified in Table 1.
The attenuation of the balun shall be kept as low as possible because it will limit the dynamic range of the
coupling attenuation or screening attenuation measurements.
Table 1 - Balun performance characteristics (30 MHz to 1 GHz)
Parameter Value
1)
Impedance, primary 50 Ω (unbalanced)
2)
Impedance, secondary
100 Ω or 150 Ω (balanced)
4)
Operational attenuation (including matching pads
≤ 10 dB
if used)
Return loss, bi-directional ≥ 6 dB
Power rating To accommodate the power of the generator
and amplifier (if applicable)
3)
Output signal balance
≥ 50 dB from 30 MHz to 100 MHz
≥ 30 dB from 100 MHz to 1 GHz
1)
Primary impedance may differ, if necessary, to accommodate analyzer outputs other than 50 Ω.
2)
Balanced outputs of the test baluns shall be matched to the nominal impedance of the balanced terminating cable pair.
100 Ω shall be used for termination of 120 Ω cabling.
3)
Measured per ITU-T Recommendations G.117 and O.9
4)
The operational attenuation of a balun shall be mathematically deduced from 3 operational attenuation measurements with
3 baluns back-to-back
4.1.3 Test head and extension cable requirements
4.1.3.1 General requirements
Unscreened balanced test heads (if applicable) and extension cables shall be used for testing
unscreened, balanced connecting hardware. Screened balanced test heads (if applicable) and extension
cables shall be used for testing screened, balanced connecting hardware. Unbalanced (coaxial) test
heads (if applicable) and extension cables shall be used for testing unbalanced connecting hardware.
The electrical transmission performance including electromagnetic screening and unbalance attenuation
of the test head (if applicable) and the extension cable shall be better or equal to the performance of the
connecting hardware under test. The choice of the extension cable should assure the minimum
operational attenuation and reflection loss of the set-up possible.
The extension cables shall have the same nominal characteristic impedance as the connecting hardware
under test. The velocity of propagation for the two extension cables, terminating the connecting hardware,
shall be similar (same type of insulation e. g. foamed or solid). The operational attenuation of the near end
terminating cable including test head (if applicable) shall be less than 1 dB up to 100 MHz.
The extension cables shall have a balance (when measuring balanced patch cords) and shall have a
screen (when measuring screened patch cords) as good as possible.
4.1.3.2 Testing one part of connecting hardware
Testing one part of connecting hardware requires a test head which mates the connecting hardware under
test.
- 7 - EN 50289-1-14:2004
The test head, the extension cable and the connection between test head and the extension cable shall
have a balance or screening or balance and screening as good as can be obtained. To further enhance
the measurement sensitivity the connection between the test head and the extension cable may be
improved since it does not form part of the device under test. It is not al
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