EN 60728-6:2011

Cable networks for television signals, sound signals and interactive services - Part 6: Optical equipment

IEC 60728-6:2011(E) lays down the measuring methods, performance requirements and data publication requirements of optical equipment of cable networks for television signals, sound signals and interactive services. This third edition cancels and replaces the second edition published in 2003 of which it constitutes a technical revision. It includes the following significant technical changes with respect to the previous edition: - The normative references were updated. - The methods of measurement for optical power and return loss were substituted by references to other standards. - The method of measurement for polarization dependent loss was deleted. - A method of measurement for carrier-to-crosstalk ratio (CCR) was added. - The methods of measurement for CSO and CTB of optical amplifiers were substituted by a method of measurement for microscopic gain tilt of optical amplifiers. This parameter can be used for calculating the second order distortion of optical amplifiers according to the method described in the new Annex B. New classes for optical transmitters and receivers have been defined.

Kabelnetze für Fernsehsignale, Tonsignale und interaktive Dienste - Teil 6: Optische Geräte

Réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion sonore et services interactifs - Partie 6: Matériels optiques

L'IEC 60728-6:2011 présente les méthodes de mesure, les exigences de performance et les exigences de publication de données des matériels optiques des réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion sonore et services interactifs. La présente norme • s'applique à tous les émetteurs, récepteurs, amplificateurs, coupleurs directifs, isolateurs, dispositifs de multiplexage, connecteurs et épissures, optiques, utilisés dans les réseaux de distribution par câbles; • couvre la gamme de fréquences de 5 MHz à 3 000 MHz; • identifie les exigences de performance garanties pour certains paramètres; • présente les exigences de publication des données avec une performance garantie; • décrit les méthodes de mesure pour l'essai de conformité. Toutes les exigences et les données publiées concernent les niveaux de performance minimums dans la gamme de fréquence spécifiée et dans des conditions d'adaptation correcte, tels que pouvant s'appliquer aux réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion sonore et services interactifs. L'IEC 60728-6:2011 annule et remplace la deuxième édition parue en 2003, dont elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente. • Les références normatives ont été mises à jour. • Les méthodes de mesure de la puissance optique et de l’affaiblissement de réflexion ont été remplacées par des références à d’autres normes. • La méthode de mesure de l’affaiblissement dépendant de la polarisation a été supprimée. • Une méthode de mesure du rapport porteuse sur diaphonie (CCR) a été ajoutée. • Les méthodes de mesure de CSO (Distorsion composite d’ordre deux) et de CTB (Battement triple composite) des amplificateurs optiques ont été remplacées par une méthode de mesure de la variation de gain microscopique des amplificateurs optiques. Ce paramètre peut être utilisé pour calculer la distorsion d’ordre deux des amplificateurs optiques selon la méthode décrite à la nouvelle Annexe B. • De nouvelles classes d’émetteurs et récepteurs optiques ont été définies.

Kabelska omrežja za televizijske signale, zvokovne signale in interaktivne storitve - 6. del: Optična oprema (IEC 60728-6:2011)

Ta del IEC 60728 predpisuje merilne metode, zahteve za zmogljivost in zahteve za objavo podatkov za optično opremo kabelskih omrežij za televizijske signale, zvočne signale in interaktivne storitve. Ta standard - velja za vse optične oddajnike, sprejemnike, ojačevalnike, smerne spojnike, izolatorje, multipleksne naprave, konektorje in spoje, ki se uporabljajo v kabelskih obrežjih; - zajema frekvenčni razpon od 5 do 3000 MHz; OPOMBA: Zgornja meja 3000 MHz je podana kot primer in ne stroga vrednost. - opredeljuje zagotovljene zahteve za zmogljivost za določene parametre; - določa zahteve za objavo podatkov z zagotovljeno zmogljivostjo; - opisuje merilne metode za preskušanje skladnosti. Vse zahteve in objavljeni podatki se nanašajo na minimalne ravni zmogljivosti v določenem frekvenčnem razponu in v enakih okoliščinah, kot lahko veljajo za kabelska omrežja za televizijske signale, zvočne signale in interaktivne storitve.

General Information

• Status: Published
• Publication Date: 09-Jun-2011
• Withdrawal Date: 15-May-2014
• ICS: 33.060.40 - Cabled distribution systems
• ICS: 33.160.99 - Other audio, video and audiovisual equipment
• Technical Committee: CLC/TC 209 - Cable networks for television signals, sound signals and interactive services
• Drafting Committee: IEC/TC 100 - IEC_TC_100
• Parallel Committee: IEC/TC 100 - IEC_TC_100
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 10-Jun-2011
• Completion Date: 23-Sep-2025
• Ref Project: SIST EN 60728-6:2011 - Cable networks for television signals, sound signals and interactive services - Part 6: Optical equipment (IEC 60728-6:2011)

Relations

• Replaces: EN 60728-6:2003 - Cable networks for television signals, sound signals and interactive services - Part 6: Optical equipment
• Effective Date: 29-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2011
1DGRPHãþD
SIST EN 60728-6:2004
.DEHOVNDRPUHåMD]DWHOHYL]LMVNHVLJQDOH]YRNRYQHVLJQDOHLQLQWHUDNWLYQHVWRULWYH
GHO2SWLþQDRSUHPD,(&
Cable networks for television signals, sound signals and interactive services - Part 6:
Optical equipment (IEC 60728-6:2011)
Kabelnetze für Fernsehsignale, Tonsignale und interaktive Dienste - Teil 6: Optische
Geräte (IEC 60728-6:2011)
Réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion
sonore et services interactifs - Partie 6: Matériels optiques (CEI 60728-6:2011)
Ta slovenski standard je istoveten z: EN 60728-6:2011
ICS:
33.060.40 Kabelski razdelilni sistemi Cabled distribution systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60728-6
NORME EUROPÉENNE
June 2011
EUROPÄISCHE NORM
ICS 33.060.40; 33.160.99 Supersedes EN 60728-6:2003

English version
Cable networks for television signals, sound signals and interactive
services -
Part 6: Optical equipment
(IEC 60728-6:2011)
Réseaux de distribution par câbles pour Kabelnetze für Fernsehsignale,
signaux de télévision, signaux de Tonsignale und interaktive Dienste -
radiodiffusion sonore et services Teil 6: Optische Geräte
interactifs - (IEC 60728-6:2011)
Partie 6: Matériels optiques
(CEI 60728-6:2011)
This European Standard was approved by CENELEC on 2011-05-16. 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 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, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60728-6:2011 E
Foreword
The text of document 100/1654/CDV, future edition 3 of IEC 60728-6, prepared by technical area 5,
Cable networks for television signals, sound signals and interactive services, of IEC TC 100, Audio, video
and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as EN 60728-6 on 2011-05-16.
This European Standard supersedes EN 60728-6:2003.
– The normative references were updated.
– The methods of measurement for optical power and return loss were substituted by
references to other standards.
– The method of measurement for polarization dependent loss was deleted.
– A method of measurement for carrier-to-crosstalk ratio (CCR) was added.
– The methods of measurement for CSO and CTB of optical amplifiers were substituted by a
method of measurement for microscopic gain tilt of optical amplifiers. This parameter can
be used for calculating the second order distortion of optical amplifiers according to the
method described in the new Annex B.
– New classes for optical transmitters and receivers have been defined.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
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) 2012-02-16
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-05-16
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60728-6:2011 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60068 series NOTE  Harmonized in EN 60068 series (not modified).
IEC 60068-2-48 NOTE  Harmonized as EN 60068-2-48.
IEC 60169-2 NOTE  Harmonized as EN 60169-2.
IEC 60728-5 NOTE  Harmonized as EN 60728-5.

- 3 - EN 60728-6:2011
IEC 60793-2-50 NOTE  Harmonized as EN 60793-2-50.
IEC 60825-2 NOTE  Harmonized as EN 60825-2.
IEC 61280-2-2 NOTE  Harmonized as EN 61280-2-2.
IEC 61280-4-2 NOTE  Harmonized as EN 61280-4-2.
IEC 61281-1:1999 NOTE  Harmonized as EN 61281-1:1999 (not modified).
IEC 61290-1-1 NOTE  Harmonized as EN 61290-1-1.
IEC 61290-1-2 NOTE  Harmonized as EN 61290-1-2.
IEC 61290-3-1 NOTE  Harmonized as EN 61290-3-1.
IEC 61290-6-1 NOTE  Harmonized as EN 61290-6-1.
IEC 61291-4 NOTE  Harmonized as EN 61291-4.
__________
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  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

1)
IEC 60068-1 1988 Environmental testing - EN 60068-1 1994
+ corr. October 1988 Part 1: General and guidance

IEC 60068-2-1 - Environmental testing - EN 60068-2-1 -
Part 2-1: Tests - Test A: Cold

IEC 60068-2-2 - Environmental testing - EN 60068-2-2 -
Part 2-2: Tests - Test B: Dry heat

IEC 60068-2-6 2007 Environmental testing - EN 60068-2-6 2008
Part 2-6: Tests - Test Fc: Vibration
(sinusoidal)
IEC 60068-2-14 - Environmental testing - EN 60068-2-14 -
Part 2-14: Tests - Test N: Change of
temperature
IEC 60068-2-27 - Environmental testing - EN 60068-2-27 -
Part 2-27: Tests - Test Ea and guidance:
Shock
IEC 60068-2-30 - Environmental testing - EN 60068-2-30 -
Part 2-30: Tests - Test Db: Damp heat, cyclic
(12 h + 12 h cycle)
IEC 60068-2-31 - Environmental testing - EN 60068-2-31 -
Part 2-31: Tests - Test Ec: Rough handling
shocks, primarily for equipment-type
specimens
IEC 60068-2-40 - Environmental testing - EN 60068-2-40 -
Part 2-40: Tests. Test Z/AM: Combined
cold/low air pressure tests
IEC 60169-24 - Radio-frequency connectors - EN 60169-24 -
Part 24: Radio-frequency coaxial connectors
with screw coupling, typically for use in 75
ohm cable distribution systems (Type F)

IEC 60529 - Degrees of protection provided by enclosures - -
(IP Code)
IEC 60728-1 - Cable networks for television signals, sound EN 60728-1 -
signals and interactive services -
Part 1: System performance of forward paths

1)
EN 60068-1 includes A1 to IEC 60068-1 + corr. October.

- 5 - EN 60728-6:2011
Publication Year Title EN/HD Year
IEC 60728-2 - Cabled distribution systems for television and - -
sound signals -
Part 2: Electromagnetic compatibility for
equipment
IEC 60728-3 2010 Cable networks for television signals, sound EN 60728-3 2011
signals and interactive services -
Part 3: Active wideband equipment for cable
networks
IEC 60728-11 - Cable networks for television signals, sound EN 60728-11 -
signals and interactive services -
Part 11: Safety
IEC 60728-13 2010 Cable networks for television signals, sound EN 60728-13 2010
+ corr. August 2010 signals and interactive services -
Part 13: Optical systems for broadcast signal
transmissions
IEC 60793-2-50 2008 Optical fibres - EN 60793-2-50 2008
Part 2-50: Product specifications - Sectional
specification for class B single-mode fibres

IEC 60825-1 - Safety of laser products - EN 60825-1 -
Part 1: Equipment classification and
requirements
IEC 61280-1-1 - Fibre optic communication subsystem basic EN 61280-1-1 -
test procedures -
Part 1-1: Test procedures for general
communication subsystems - Transmitter
output optical power measurement for single-
mode optical fibre cable
IEC 61280-1-3 - Fibre optic communication subsystem test EN 61280-1-3 -
procedures -
Part 1-3: General communication subsystems
- Central wavelength and spectral width
measurement
IEC/TR 61282-4 - Fibre optic communication system design - -
guides -
Part 4: Accomodation and utilization of non-
linear effects
IEC 61290-1 Series Optical amplifiers - Test methods - EN 61290-1 Series
Part 1: Optical power and gain parameters

IEC 61290-1-3 - Optical amplifiers - Test methods - EN 61290-1-3 -
Part 1-3: Power and gain parameters - Optical
power meter method
2)
IEC 61290-3-2 2003 Optical amplifiers - EN 61290-3-2 2003
Part 3-2: Test methods for noise figure
parameters - Electrical spectrum analyzer
method
IEC 61290-5 Series Optical amplifiers - Test methods - EN 61290-5 Series
Part 5: Reflectance
IEC 61290-6 Series Optical fibre amplifiers - Basic specification - EN 61290-6 Series
Part 6: Test methods for pump leakage
parameters
2)
EN 61290-3-2 is superseded by EN 61290-3-2:2008, which is based on IEC 61290-3-2:2008.

Publication Year Title EN/HD Year
IEC 61290-11 Series Optical amplifier - Test methods - EN 61290-11 Series
Part 11: Polarization mode dispersion
parameter
IEC 61291-1 - Optical amplifiers - EN 61291-1 -
Part 1: Generic specification
IEC 61291-5-2 - Optical amplifiers - EN 61291-5-2 -
Part 5-2: Qualification specifications -
Reliability qualification for optical fibre
amplifiers
IEC 61300-3-6 - Fibre optic interconnecting devices and EN 61300-3-6 -
passive components - Basic test and
measurement procedures -
Part 3-6: Examinations and measurements -
Return loss
IEC 61754-4 - Fibre optic connector interfaces - EN 61754-4 -
Part 4: Type SC connector family

IEC/TR 61931 1998 Fibre optic - Terminology - -

IEC 80416 Series Basic principles for graphical symbols for use EN 80416 Series
on equipment
IEC 60417 database Graphical symbols for use on equipment - -

IEC 60617 database Graphical symbols for diagrams - -

IEC 60728-6 ®
Edition 3.0 2011-04
INTERNATIONAL
STANDARD
Cable networks for television signals, sound signals and interactive services –
Part 6: Optical equipment
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XB
ICS 33.060.40; 33.160.99 ISBN 978-2-88912-427-5
– 2 – 60728-6 © IEC:2011(E)
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references. 9
3 Terms, definitions, symbols and abbreviations . 11
3.1 Terms and definitions . 11
3.2 Symbols . 18
3.3 Abbreviations . 19
4 Methods of measurement . 20
4.1 Measurement requirements . 20
4.1.1 General . 20
4.1.2 Input specification . 20
4.1.3 Measurement conditions . 20
4.2 Optical power . 21
4.3 Loss, isolation, directivity and coupling ratio . 21
4.3.1 General . 21
4.3.2 Measurement requirements . 21
4.3.3 Principle of measurement . 21
4.4 Return loss . 22
4.5 Saturation output power of an optical amplifier . 22
4.5.1 Purpose . 22
4.5.2 Procedure . 22
4.6 Centroidal wavelength and spectral width under modulation . 22
4.7 Linewidth and chirping of transmitters with single mode lasers . 23
4.7.1 Purpose . 23
4.7.2 Equipment required . 23
4.7.3 General measurement requirements . 23
4.7.4 Procedure . 23
4.7.5 Potential sources of error . 25
4.8 Optical modulation index . 25
4.8.1 Purpose . 25
4.8.2 Equipment required . 25
4.8.3 Procedure . 25
4.8.4 Potential sources of error . 26
4.9 Reference output level of an optical receiver . 26
4.9.1 Purpose . 26
4.9.2 Equipment required . 26
4.9.3 General measurement requirements . 27
4.9.4 Procedure . 27
4.9.5 Potential sources of error . 27
4.10 Slope and flatness . 28
4.10.1 Purpose . 28
4.10.2 Equipment required . 28
4.10.3 Procedure . 28
4.10.4 Potential sources of error . 29

60728-6 © IEC:2011(E) – 3 –
4.11 Composite second order distortion (CSO) of optical transmitters . 29
4.11.1 Purpose . 29
4.11.2 Equipment required . 30
4.11.3 Procedure . 30
4.11.4 Potential sources of error . 30
4.12 Composite triple beats (CTB) of optical transmitters . 30
4.12.1 Purpose . 30
4.12.2 Equipment required . 31
4.12.3 Procedure . 31
4.12.4 Potential sources of error . 31
4.13 Composite crossmodulation of optical transmitters . 31
4.13.1 Purpose . 31
4.13.2 Equipment required . 32
4.13.3 Procedure . 32
4.13.4 Potential sources of error . 34
4.14 Receiver intermodulation . 34
4.14.1 Purpose . 34
4.14.2 Equipment required . 34
4.14.3 General measurement requirements . 35
4.14.4 Procedure . 35
4.14.5 Potential sources of error . 36
4.15 Microscopic gain tilt of optical amplifiers . 36
4.15.1 Purpose . 36
4.15.2 Equipment required . 36
4.15.3 Procedure . 37
4.15.4 Potential sources of error . 38
4.16 Noise parameters of optical transmitters and optical receivers . 38
4.16.1 Purpose . 38
4.16.2 Equipment required . 38
4.16.3 General measurement requirements . 39
4.16.4 Procedure . 40
4.16.5 Relative intensity noise . 42
4.16.6 Equivalent input noise current density . 42
4.16.7 Potential sources of error . 42
4.17 Method for combined measurement of relative intensity noise (RIN), optical
modulation index and equivalent input noise current . 43
4.17.1 Purpose . 43
4.17.2 Equipment required . 43
4.17.3 General measurement conditions . 44
4.17.4 Procedure . 44
4.17.5 Potential sources of error . 45
4.18 Noise figure of optical amplifiers . 45
4.19 Influence of fibre . 45
4.19.1 Purpose . 45
4.19.2 Equipment required . 45
4.19.3 Procedure . 45
4.19.4 Potential sources of error . 45
4.20 SBS threshold . 46

– 4 – 60728-6 © IEC:2011(E)
4.20.1 Purpose . 46
4.20.2 Equipment required . 46
4.20.3 Procedure . 46
4.20.4 Potential sources of error . 47
4.21 Carrier-to-crosstalk ratio (CCR) . 47
4.21.1 Purpose . 47
4.21.2 Equipment required . 47
4.21.3 Procedure . 47
4.21.4 Potential sources of error . 48
5 Universal performance requirements and recommendations . 48
5.1 Safety . 48
5.2 Electromagnetic compatibility (EMC) . 48
5.3 Environmental . 48
5.3.1 Requirements . 48
5.3.2 Storage . 49
5.3.3 Transportation . 49
5.3.4 Installation or maintenance . 49
5.3.5 Operation . 49
5.4 Marking . 49
6 Active equipment . 49
6.1 Optical forward path transmitters . 49
6.1.1 Classification . 49
6.1.2 Data publication requirement. 50
6.1.3 Recommendations . 50
6.1.4 Performance requirements . 51
6.2 Optical return path transmitters . 53
6.2.1 Classificaton . 53
6.2.2 Data publication requirement. 53
6.2.3 Recommendations . 53
6.2.4 Performance requirements . 54
6.3 Optical receivers . 54
6.3.1 Classification . 54
6.3.2 Data publication requirements . 54
6.3.3 Recommendations . 55
6.3.4 Performance requirements . 55
6.4 Optical amplifiers . 56
6.4.1 Classification . 56
6.4.2 Data publication requirements . 56
6.4.3 Performance requirements . 56
7 Connectors and splices . 57
Annex A (normative) Product specification worksheet for optical amplifiers . 58
Annex B (informative) Calculation of second-order distortion caused by microscopic
gain tilt of optical amplifiers . 59
Bibliography . 60

60728-6 © IEC:2011(E) – 5 –
Figure 1 – Tilt and microscopic gain tilt of optical amplifiers . 17
Figure 2 – Measurement of optical loss, directivity and isolation . 21
Figure 3 – Optical saturation output power . 22
Figure 4 – Measurement of the chirping and the linewidth of transmitters . 24
Figure 5 – Measurement of the optical modulation index . 26
Figure 6 – Measurement of the reference output level of an optical receiver . 27
Figure 7 – Measurement of the slope and flatness . 28
Figure 8 – Evaluation of the slope . 29
Figure 9 – Evaluating the flatness . 29
Figure 10 – Device under test for measuring CSO of optical transmitters . 30
Figure 11 – Device under test for measuring CTB of optical transmitters . 31
Figure 12 – Arrangement for measuring composite crossmodulation of optical
transmitters . 33
Figure 13 – Arrangement of test equipment for measuring receiver intermodulation . 35
Figure 14 – Arrangement of test equipment for measuring microscopic gain tilt . 37
Figure 15 – System with internal noise sources . 38
Figure 16 – PIN diode receiver . 39
Figure 17 – Optical transmission system under test . 40
Figure 18 – Arrangement of test equipment for carrier-to-noise measurement . 40
Figure 19 – Measurement set-up for determination of the noise parameters and the

optical modulation index . 44
Figure 20 – Arrangement for measuring the SBS threshold . 46
Figure 21 – Arrangement for measuring the CCR . 47
Figure 22 – Classification of return path transmitters . 53

Table 1 – Noise correction factors C for different noise level differences D . 41
n
Table 2 – Classes of optical forward path transmitters . 50
Table 3 – Data publication requirements for optical forward path transmitters . 50
Table 4 – Recommendations for optical forward path transmitters . 51
Table 5 – Requirements for optical forward path transmitters . 52
Table 6 – Data publication requirements for optical return path transmitters . 53
Table 7 – Recommendations for optical return path transmitters . 53
Table 8 – Requirements for optical return path transmitters . 54
Table 9 – Classification of optical receivers . 54
Table 10 – Data publication requirements for optical receivers . 55
Table 11 – Recommendations for optical receivers . 55
Table 12 – Performance requirements for optical receivers . 56
Table 13 – Classification of optical amplifiers . 56
Table 14 – Performance requirements for optical amplifiers . 57
Table A.1 – Parameters of optical amplifiers . 58

– 6 – 60728-6 © IEC:2011(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –

Part 6: Optical equipment
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,
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in the subject dealt with may participate in this preparatory work. International, governmental and non-
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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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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 60728-6 has been prepared by technical area 5: Cable networks for
television signals, sound signals and interactive services, of IEC technical committee 100:
Audio, video and multimedia systems and equipment.
This third edition cancels and replaces the second edition published in 2003 of which it
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition.
• The normative references were updated.
• The methods of measurement for optical power and return loss were substituted by
references to other standards.
• The method of measurement for polarization dependent loss was deleted.

60728-6 © IEC:2011(E) – 7 –
• A method of measurement for carrier-to-crosstalk ratio (CCR) was added.
• The methods of measurement for CSO and CTB of optical amplifiers were substituted by a
method of measurement for microscopic gain tilt of optical amplifiers. This parameter can
be used for calculating the second order distortion of optical amplifiers according to the
method described in the new Annex B.
• New classes for optical transmitters and receivers have been defined.
The text of this standard is based on the following documents:
CDV Report on voting
100/1654/CDV 100/1789/RVC
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 publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The list of all the parts of the IEC 60728 series, under the general title Cable networks for
television signals, sound signals and interactive services, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the
stability 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.
A bilingual version of this publication may be issued at a later date.

– 8 – 60728-6 © IEC:2011(E)
INTRODUCTION
Standards of the IEC 60728 series deal with cable networks including equipment and
associated methods of measurement for headend reception, processing and distribution of
television signals, sound signals and their associated data signals and for processing,
interfacing and transmitting all kinds of signals for interactive services using all applicable
transmission media.
• This covers all kinds of networks that convey modulated RF carriers such as CATV-
networks;
• MATV-networks and SMATV-networks;
• individual receiving networks;
and all kinds of equipment, systems and installations installed in such networks.
NOTE CATV encompasses the Hybrid Fibre Coaxial (HFC) networks used nowadays to provide
telecommunications services, voice, data and audio and video both broadcast and narrowcast.
The extent of this standardisation work is from the antennas and/or special signal source
inputs to the headend or other interface points to the network up to the terminal input.
The standardisation of any user terminals (i.e. tuners, receivers, decoders, multimedia
terminals, etc.) as well as of any coaxial, balanced and optical cables and accessories thereof
is excluded.
The reception of television signals inside a building requires an outdoor antenna and a
distribution network to convey the signal to the TV receivers.

60728-6 © IEC:2011(E) – 9 –
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –

Part 6: Optical equipment
1 Scope
This part of IEC 60728 lays down the measuring methods, performance requirements and data
publication requirements of optical equipment of cable networks for television signals, sound
signals and interactive services.
This standard
• applies to all optical transmitters, receivers, amplifiers, directional couplers, isolators,
multiplexing devices, connectors and splices used in cable networks;
• covers the frequency range 5 MHz to 3 000 MHz;
NOTE The upper limit of 3 000 MHz is an example, but not a strict value.
• identifies guaranteed performance requirements for certain parameters;
• lays down data publication requirements with guaranteed performance;
• describes methods of measurement for compliance testing.
All requirements and published data relate to minimum performance levels within the specified
frequency range and in well-matched conditions as might be applicable to cable networks for
television signals, sound signals and interactive services.
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 60068-1:1988, Environmental testing – Part 1: General and guidance
IEC 60068-2-1, Environmental testing – Part 2-1: Tests – Test A: Cold
IEC 60068-2-2, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-6:2007, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal)
IEC 60068-2-14, Environmental testing – Part 2-14: Tests – Test N: Change of temperature
IEC 60068-2-27, Environmental testing – Part 2-27: Tests – Test Ea and guidance: Shock
IEC 60068-2-30, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic (12+
12 h cycle)
IEC 60068-2-31, Environmental testing – Part 2-31: Tests – Test Ec: Rough handling shocks,
primarily for equipment-type specimens

– 10 – 60728-6 © IEC:2011(E)
IEC 60068-2-40, Environmental testing – Part 2-40: Tests – Test Z/AM: Combined cold/low air
pressure tests
IEC 60169-24, Radio-frequency connectors – Part 24: Radio-frequency coaxial connectors
with screw coupling, typically for use in 75 ohm cable distribution systems (Type F)
IEC 60417, Graphical symbols for use on equipment
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 60617, Graphical symbols for diagrams
IEC 60728-1, Cable networks for television signals, sound signals and interactive services –
Part 1: System performance of forward paths
IEC 60728-2, Cable networks for television signals, sound signals and interactive services –
Part 2: Electromagnetic compatibility for equipment
IEC 60728-3:2010, Cable networks for television signals, sound signals and interactive
services – Part 3: Active wideband equipment for coaxial cable networks
IEC 60728-11, Cable networks for television signals, sound signals and interactive services –
Part 11: Safety
IEC 60728-13:2010, Cable networks for television signals, sound signals and interactive
services – Part 13: Optical systems for broadcast signal transmissions
IEC 60793-2-50:2008, Optical fibres – Part 2-50: Product specifications – Sectional
specification for class B single-mode fibres
IEC 60825-1, Safety of laser products – Part 1: Equipment classification and requirements
IEC 61280-1-1, Fibre optic communication subsystem basic test procedures – Part 1-1: Test
procedures for general communication subsystems – Transmitter output optical power
measurement for single-mode optical fibre cable
IEC 61280-1-3, Fibre optic communication subsystem basic test procedures – Part 1-3:
General communication subsystems – Central wavelength and spectral width measurement
IEC 61282-4, Fibre optic communication system design guides – Part 4: Accomodation and
utilization of non-linear effects
IEC 61290-1 (all parts), Optical amplifiers – Test methods – Part 1: Power and gain
parameters
IEC 61290-1-3, Optical amplifiers – Test methods – Part 1-3: Power and gain parameters –
Optical power meter meth
...