SIST EN 50289-1-15:2005
(Main)Communication cables - Specifications for test methods -- Part 1-15: Electromagnetic performance - Coupling attenuation of links and channels (Laboratory conditions)
Communication cables - Specifications for test methods -- Part 1-15: Electromagnetic performance - Coupling attenuation of links and channels (Laboratory conditions)
This Part 1-15 of prEN EN 50289-15 details the method of laboratory test to determine the coupling attenuation for links and channels used in analogue and digital communication systems. . It is to be read in conjunction with EN 50289-1-6., EN 50289-1-13 and EN 50289-1-14.
Kommunikationskabel - Spezifikationen für Prüfverfahren - Teil 1-15: Elektromagnetisches Verhalten - Kopplungsdämpfung für konfektionierte Kabel unter Laborbedingungen
Câbles de communication - Spécifications des méthodes d'essai -- Partie 1-15: Performance électromagnétique - Affaiblissement de couplage d'ensembles de câbles (Conditions de laboratoire)
Komunikacijski kabli – Specifikacije preskusnih metod – 1-15. del: Elektromagnetne lastnosti - Sklopno slabljenje povezav in kanalov (laboratorijski pogoji)
General Information
Standards Content (Sample)
SLOVENSKI SIST EN 50289-1-15:2005
STANDARD
februar 2005
Komunikacijski kabli – Specifikacije preskusnih metod – 1-15. del:
Elektromagnetne lastnosti - Sklopno slabljenje povezav in kanalov
(laboratorijski pogoji)
Communication cables - Specifications for test methods - Part 1-15:
Electromagnetic performance - Coupling attenuation of links and channels
(Laboratory conditions)
ICS 33.120.20 Referenčna številka
SIST EN 50289-1-15:2005(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 50289-1-15
NORME EUROPÉENNE
EUROPÄISCHE NORM June 2004
ICS 33.120.10
English version
Communication cables –
Specifications for test methods
Part 1-15: Electromagnetic performance –
Coupling attenuation of links and channels
(Laboratory conditions)
Câbles de communication – Kommunikationskabel –
Spécifications des méthodes d'essai Spezifikationen für Prüfverfahren –
Partie 1-15: Performance Teil 1-15: Elektromagnetisches Verhalten -
électromagnétique – Kopplungsdämpfung für konfektionierte
Affaiblissement de couplage d'ensembles Kabel unter Laborbedingungen
de câbles (Conditions de laboratoire)
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 50289-1-15:2004 E
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EN 50289-1-15:2004 - 2 -
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 50289-1-15 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
__________
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- 3 - EN 50289-1-15:2004
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 Extension cable requirements .6
4.2 Test sample .7
4.2.0 General .7
4.2.1 Length of extension cables.7
4.2.2 Tested length .7
4.2.3 Preparation of test sample.7
4.2.3.1 Balanced cable assemblies.8
4.2.3.2 Multi-conductor links or channels .8
4.2.3.3 Coaxial links and channels.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 patch cords .10
4.5 Measuring procedure .10
4.5.1 Example of link measurement .10
5 Expression of test results .11
6 Test report .11
6.1 General .11
6.2 Evaluation of test results (informative).12
Bibliography .14
Figure 1 - Measurement of surface wave at at connecting hardware in one end of a link or channel .5
Figure 2 - Termination of link or channel or applied extension cable .8
Figure 3 - Test set-up for a near end measurement of the first connecting hardware of a link or channel.9
Figure 4 - Example of a four-connector link configuration as defined in EN 50173 .11
Figure 5 - First tested part of the link.11
Figure 6 - Second tested part of the link.11
Figure 7 - Last tested part of the link .12
Figure 8 - Typical measurement of an unscreened channel .13
Figure 9 - Typical measurement of a screened balanced channel.14
Table 1 - Balun performance characteristics .6
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EN 50289-1-15:2004 - 4 -
1 Scope
This Part 1-15 of EN 50289 details the method of laboratory test to determine the coupling attenuation for
links and channels used in analogue and digital communication systems. 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.
4 Test method
4.1 Equipment
4.1.1 General
See EN 50289-1-6, subclause 9.2.1.1 and Figure 1 below.
1)
Under consideration.
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- 5 - EN 50289-1-15:2004
±
600 cm 10 cm
Key
0 signal generator, output impedance Z 8 absorber (ferrite tube) of the clamp,
0
insertion loss > 10 dB
1 link or channel under test, nominal
characteristic impedance Z 9 absorber (or second clamp),
1
insertion loss > 10 dB
2 outer circuit of the link or channel under test,
impedance Z 10 termination of the far end extension cable
2
connected to link or channel under test
3 absorbing clamp, impedance Z
3
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
13 extension cable connected through mating
7 measuring receiver cable (use the same in connector to link or channel under test, if
measurement and calibration) applicable
14 connecting hardware in measured end of link
or channel
Figure 1 - Measurement of surface wave at connecting
hardware in one end of a link or channel
4.1.2 Balun requirements
For measurement of symmetrical cable assemblies, a means for generating symmetrical 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.
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EN 50289-1-15:2004 - 6 -
Table 1 - Balun performance characteristics
Parameter Value
1)
Impedance, primary
50 Ω (unbalanced)
2)
Impedance, secondary 100 Ω or 150 Ω (balanced)
4)
Operational attenuation ≤ 10 dB
(including matching pads 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 the highest measured
frequency.
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 symmetrical patch cord / 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 Extension cable requirements
An extension cable is only required if the channel or link under test does not include a cable, which can be
connected to the test set-up.
Unscreened extension cables shall be used for testing unscreened, balanced link or channels. Screened,
balanced extension cables shall be used for testing screened, balanced cable assemblies. Unbalanced
(coaxial) extension cables shall be used for testing unbalanced cable assemblies.
The electrical transmission performance including electromagnetic screening and unbalance attenuation
of the extension cables shall be better or equal to the performance of the link or channel under test. The
choice of the extension cable should assure the minimum insertion loss and reflection loss of the set-up
possible.
The extension cables shall have the same nominal characteristic impedance as the link or channel under
test. Likewise the velocity of propagation of the extension cables shall correspond to the link or channel
under test (same type of isolation e.g. foamed or solid). The insertion loss of a near end extension cable
including mating connector, if applicable, shall be less than 2,0 dB up to the highest measurement
frequency. The insertion loss of set-up validation cable shall be less than the insertion loss of any cable
included in the link or channel under test.
The extension cables, any mating connectors and the connection between extension cables and the
mating connectors, if applicable, shall have a balance or screening or balance and screening as good as
possible. To further enhance the measurement sensitivity the connection between the mating connector
and the extension cable may be improved since it does not form part of the device under test. It is not
allowed to improve any contact between the connecting hardware of the link or channel under test and the
mating connector of the extension cable, if applicable. The measurement sensitivity shall be 6 dB better
than the specified requirement limit for the link or channel under test. See 4.4.2.1 for determination of the
measurement sensitivity.
In case of doubt regarding the interoperability between any mating connector and the connecting
hardware of the link or channel under test, it is recommended to use the mating connector specified or
advised by the supplier of the co
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