EN 60728-14:2014
(Main)Cable networks for television signals, sound signals and interactive services - Part 14: Optical transmission systems using RFoG technology
Cable networks for television signals, sound signals and interactive services - Part 14: Optical transmission systems using RFoG technology
IEC 60728-14:2014 describes the system and equipment specification of FTTH/FTTB (fibre to the home/fibre to the building) networks where information is transmitted in both, forward and return path directions using RF subcarrier multiplexing technology, and where the return path transmission uses additionally time division multiple access technique imposed by the transmission of the return path signals using a TDMA (e.g. TDMA mode of DOCSIS) protocol. Such systems are called RF over Glass (RFoG) and consist of an RFoG optical network unit (R-ONU), an optical distribution network based on xPON structure, and an RFoG optical return path receiver. This standard specifies the basic system parameters and methods of measurement for RFoG systems in order to assess the system performance and its performance limits.
Kabelnetze für Fernsehsignale, Tonsignale und interaktive Dienste - Teil 14: Optische Übertragungssysteme mit RFoG-Technik
Réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion sonore et services interactifs - Partie 14: Systèmes de transmission optique appliquant la technologie RFoG
L'IEC 60728-14:2014 décrit les spécifications système et matériel des réseaux FTTH/FTTB (fibre optique jusqu'au domicile/fibre optique jusqu'à l'immeuble) où l'information est transmise à la fois dans le sens de voie directe et dans le sens de voie de retour, en utilisant la technologie de multiplexage par sous-porteuse RF, et où la transmission en voie de retour utilise de plus la technique d'accès multiple par répartition temporelle imposée par la transmission des signaux de voie de retour utilisant un protocole AMRT (par exemple, mode AMRT de DOCSIS). Ces systèmes sont appelés systèmes à radiofréquence sur fibre de verre (RFoG) et se composent d'une unité de réseau optique RFoG (R-ONU), d'un réseau de distribution optique basé sur la structure xPON et d'un récepteur de voie de retour optique RFoG. La présente norme spécifie les paramètres de base du système, ainsi que les méthodes de mesure pour les systèmes RFoG, pour évaluer tant les performances du système que ses limites.
Kabelska omrežja za televizijske in zvokovne signale ter interaktivne storitve - 14. del: Optični prenosni sistemi s tehnologijo RFoG (IEC 60728-14:2014)
Standard EN IEC 60728-14 opisuje specifikacijo sistema in opreme za omrežja FTTH/FTTB (optična vlakna do doma/optična vlakna do stavbe), kjer se informacije prek tehnologije multipleksiranja podnosilca radijskih frekvenc prenašajo v obeh smereh, po naprejšnji in povratni poti. Ob tem prenos po povratni poti uporablja dodatno tehniko več dostopov z delitvijo časa, ki jo omogoča prenos signalov po povratni poti prek protokola TDMA (npr. način TDMA za DOCSIS). Tovrstni sistemi so imenovani prenosni sistemi radijskih frekvenc prek optičnih vlaken (RFoG), ki predstavljajo optično distribucijsko omrežje, temelječe na strukturi xPON in sprejemniku optične povratne poti RFoG. Ta standard določa osnovne sistemske parametre in metode za merjenje sistemov RFoG z namenom ocenjevanja učinkovitosti sistema in njegovih omejitev. Standard ne zajema podrobnega opisa fizične plasti in tehnologij prenosa IP.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2014
.DEHOVNDRPUHåMD]DWHOHYL]LMVNHLQ]YRNRYQHVLJQDOHWHULQWHUDNWLYQHVWRULWYH
GHO 2SWLþQLSUHQRVQLVLVWHPLVWHKQRORJLMR5)R* ,(&
Cable networks for television signals, sound signals and interactive services - Part 14:
Optical transmission systems using RFoG technology (IEC 60728-14:2014)
Kabelnetze für Fernsehsignale, Tonsignale und interaktive Dienste - Teil 14: Optische
Übertragungssysteme mit RFoG-Technik (IEC 60728-14:2014)
Réseaux de distribution par câbles destinés aux signaux de télévision, de radiodiffusion
sonore et aux service interactifs - Partie 14: Systèmes de transmission optique
appliquant la technologie RFoG (CIE 60728-14:2014)
Ta slovenski standard je istoveten z: EN 60728-14:2014
ICS:
33.060.40 Kabelski razdelilni sistemi Cabled distribution systems
33.180.01 6LVWHPL]RSWLþQLPLYODNQLQD Fibre optic systems in
VSORãQR general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN 60728-14
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2014
ICS 33.060.40; 33.160; 33.180
English Version
Cable networks for television signals, sound signals and
interactive services - Part 14: Optical transmission systems
using RFoG technology
(IEC 60728-14:2014)
Réseaux de distribution par câbles pour signaux de Kabelnetze für Fernsehsignale, Tonsignale und interaktive
télévision, signaux de radiodiffusion sonore et services Dienste - Teil 14: Optische Übertragungssysteme mit
interactifs - Partie 14: Systèmes de transmission optique RFoG-Technik
appliquant la technologie RFoG (IEC 60728-14:2014)
(CEI 60728-14:2014)
This European Standard was approved by CENELEC on 2014-04-11. 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, 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
© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60728-14:2014 E
Foreword
The text of document 100/2248/FDIS, future edition 1 of IEC 60728-14, 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
approved by CENELEC as EN 60728-14:2014.
The following dates are fixed:
• latest date by which the document has to be (dop) 2015-01-11
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2017-04-11
• latest date by which the national
standards conflicting with the
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 60728-14:2014 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 as EN 60068 Series (not modified).
IEC 60169-24 NOTE Harmonized as EN 60169-24.
IEC 60728-5 NOTE Harmonized as EN 60728-5.
IEC 60793-2-50 NOTE Harmonized as EN 60793-2-50.
IEC 60825-2 NOTE Harmonized as EN 60825-2.
IEC 61281-1:1999 NOTE Harmonized as EN 61281-1:1999 (not modified).
IEC 61280-2-2 NOTE Harmonized as EN 61280-2-2.
IEC 61280-4-2 NOTE Harmonized as EN 61280-4-2.
IEC 61290-1-1 NOTE Harmonized as EN 61290-1-1.
IEC 61290-1-2 NOTE Harmonized as EN 61290-1-2.
IEC 61290-6-1 NOTE Harmonized as EN 61290-6-1.
IEC 61291-4 NOTE Harmonized as EN 61291-4.
IEC 80416 Series NOTE Harmonized as EN 80416 Series (not modified).
.
- 3 - EN 60728-14:2014
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu
Publication Year Title EN/HD Year
1)
IEC 60068-1 1988 Environmental testing - EN 60068-1 1994
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 - Part 2-2: Tests - EN 60068-2-2 -
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 - Basic environmental testing procedures - EN 60068-2-40 -
Part 2: Tests - Test Z/AM: Combined
cold/low air pressure tests
IEC 60529 - Degrees of protection provided by EN 60529 -
enclosures (IP Code)
IEC 60728-1 - Cable networks for television signals, EN 60728-1 -
sound signals and interactive services -
Part 1: System performance of forward
paths
1)
Superseded by EN 60068-1:2014 (IEC 60068-1:2013).
Publication Year Title EN/HD Year
IEC 60728-2 - Cable networks for television signals, EN 50083-2 -
sound signals and interactive services -
Part 2: Electromagnetic compatibility for
equipment
IEC 60728-3 - Cable networks for television signals, EN 60728-3 -
sound signals and interactive services -
Part 3: Active wideband equipment for
cable networks
IEC 60728-6 2011 Cable networks for television signals, EN 60728-6 2011
sound signals and interactive services -
Part 6: Optical equipment
IEC 60728-10 2014 Cable networks for television signals, EN 60728-10 2014
sound signals and interactive services -
Part 10: System performance of return
paths
IEC 60728-11 - Cable networks for television signals, EN 60728-11 -
sound signals and interactive services -
Part 11: Safety
IEC 60728-13 2010 Cable networks for television signals, EN 60728-13 2010
sound signals and interactive services -
Part 13: Optical systems for broadcast
signal transmissions
IEC 60728-13-1 2012 Cable networks for television signals, EN 60728-13-1 2012
sound signals and interactive services -
Part 13-1: Bandwidth expansion for
broadcast signal over FTTH system
IEC 60793-2-50 2012 Optical fibres - EN 60793-2-50 2013
Part 2-50: Product specifications -
Sectional specification for class B
single-mode fibres
IEC 60794-3-11 2010 Optical fibre cables - EN 60794-3-11 2010
Part 3-11: Outdoor cables - Product
specification for duct, directly buried and
lashed aerial single-mode optical fibre
telecommunication cables
IEC 60825-1 - Safety of laser products - EN 60825-1 -
Part 1: Equipment classification and
requirements
IEC 61169-2 - Radio-frequency connectors - EN 61169-2 -
Part 2: Sectional specification - Radio
frequency coaxial connectors of type
9,52
IEC 61169-24 - Radio-frequency connectors - EN 61169-24 -
Part 24: Sectional specification - Radio
frequency coaxial connectors with screw
coupling, typically for use in 75 ohm
cable networks (type F)
- 5 - EN 60728-14:2014
Publication Year Title EN/HD Year
IEC 61280-1-1 - Fibre optic communication EN 61280-1-1 -
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 EN 61280-1-3 -
subsystem test procedures -
Part 1-3: General communication
subsystems - Central wavelength
and spectral width measurement
IEC 61754-4 - Fibre optic interconnecting devices and EN 61754-4 -
passive components - Fibre optic
connector interfaces -
Part 4: Type SC connector family
IEC/TR 61931 1998 Fibre optic - Terminology - -
IEEE 802.3 2008 IEEE Standard for Information - -
technology - Telecommunications
and information exchange between
systems - Local and metropolitan area
networks - Specific requirements -
Part-3: Carrier Sense Multiple Access
with Collision Detection (CSMA/CD)
Access Method and Physical Layer
Specifications
IEEE 802.3av 2009 IEEE Standard for Information - -
technology - Local and metropolitan area
networks - Specific requirements -
Part 3: CSMA/CD Access Method and
Physical Layer Specifications -
Amendment 1: Physical Layer
Specifications and Management
Parameters for 10 Gb/s Passive Optical
Networks
IEC 60728-14 ®
Edition 1.0 2014-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Cable networks for television signals, sound signals and interactive services –
Part 14: Optical transmission systems using RFoG technology
Réseaux de distribution par câbles pour signaux de télévision, signaux de
radiodiffusion sonore et services interactifs –
Partie 14: Systèmes de transmission optique appliquant la technologie RFoG
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XA
ICS 33.060.40; 33.160; 33.180 ISBN 978-2-8322-1439-8
– 2 – IEC 60728-14:2014 © IEC 2014
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions, symbols and abbreviations . 10
3.1 Terms and definitions . 10
3.2 Symbols . 16
3.3 Abbreviations . 16
4 System reference model . 17
5 RFoG ONU reference architecture . 18
6 Method of measurements . 19
6.1 Optical power . 19
6.2 Centroidal wavelength and spectral width under modulation . 19
6.3 Optical wavelength . 20
6.4 Linewidth and chirping of transmitters with single mode lasers . 20
6.5 Optical modulation index . 20
6.6 Reference output level of an optical receiver. 20
6.7 Noise parameters of optical transmitters and optical receivers . 20
6.8 Relative intensity noise (RIN), optical modulation index and equivalent
input noise current (EINC) . 20
6.9 Carrier level and carrier-to-noise ratio . 20
6.10 Noise power ratio (NPR) . 20
6.11 Carrier-to-noise ratio defined by optical signal . 21
6.12 Carrier-to-crosstalk ratio (CCR) . 21
7 System performance requirements . 21
7.1 Digital data system . 21
7.1.1 ODN . 21
7.1.2 Performance allocation . 21
7.2 Forward path and return path frequency split . 22
8 RFoG equipment specifications . 22
8.1 General specifications . 22
8.1.1 Safety . 22
8.1.2 Electromagnetic compatibility (EMC) . 22
8.1.3 Environmental conditions . 22
8.1.4 Marking . 23
8.2 R-ONU . 23
8.2.1 Indicators . 23
8.2.2 R-ONU forward path receiver specifications . 23
8.2.3 Return path performance of R-ONU . 25
8.2.4 Remote control functions . 29
8.3 Headend specifications . 34
8.3.1 Headend forward path specifications . 34
8.3.2 Headend return path specifications: R-RRX . 34
IEC 60728-14:2014 © IEC 2014 – 3 –
Annex A (informative) Implementation notes . 36
Annex B (informative) System loss specification . 38
B.1 General . 38
B.2 Forward path considerations . 38
B.3 Return path considerations . 39
Annex C (informative) Optical beat interference . 42
C.1 General . 42
C.2 Operating conditions of ODN . 42
C.3 Operating conditions of optical receiver at the headend system. 42
C.4 Operating conditions of CMTS . 43
C.5 Environmental conditions. 43
C.6 Relation between optical transmission loss and OMI . 43
C.7 Design margin of ODN . 44
C.8 Example of system design . 45
C.9 Method of measurement of OBI . 46
C.9.1 Purpose . 46
C.9.2 Measurement setup . 46
C.9.3 Example of measurement conditions . 46
C.9.4 Procedure . 47
C.9.5 Presentation of results . 47
C.10 Method of measurement of OBI (measurement with CW signals) . 47
C.10.1 Purpose . 47
C.10.2 Measurement setup . 47
C.10.3 Procedure . 48
Annex D (normative) Optional remote control manager . 49
Annex E (informative) Outdoor housings for R-ONU protection . 50
Annex F (informative) Effect of off-state optical power on C/N ratio of transmission
signal. 51
Bibliography . 53
Figure 1 – Optical system reference model for RFoG . 18
Figure 2 – Principle schematics of R-ONU . 19
Figure 3 – Measurement of optical wavelength using WDM coupler . 20
Figure 4 – R-ONU turn-on and turn-off diagram . 29
Figure 5 – Example of the remote control system configuration . 30
Figure 6 – Data format . 31
Figure 7 – Structure of data packet . 31
Figure 8 – Control transfer process . 32
Figure 9 – Timing of data transmission . 32
Figure A.1 – Placement of attenuators when system loss is too low . 37
Figure B.1 – Performance allocation of the return path transmission system . 39
Figure B.2 – Section C/N specification for SDU and MDU in-house wiring. 41
Figure C.1 – Optical transmission loss and OMI . 44
Figure C.2 – ODN design margin . 44
Figure C.3 – Setup used for the measurement of OBI . 46
– 4 – IEC 60728-14:2014 © IEC 2014
Figure C.4 – Setup used for the measurement of OBI (CW method). 48
Table 1 – ODN Specifications . 21
Table 2 – RF frequencies . 22
Table 3 – Classification of R-ONU optical receivers . 24
Table 4 – Data publication requirements for R-ONU optical receivers. 24
Table 5 – Recommendations for R-ONU optical receivers . 24
Table 6 – Performance requirements for R-ONU optical receivers. 25
Table 7 – Classes of optical return path transmitters . 25
Table 8 – Data publication requirements for optical return path transmitters . 26
Table 9 – Performance requirements for optical parameters and interfaces. 26
Table 10 – Electrical properties requirements for R-ONU optical return path transmitters . 27
Table 11 – R-ONU turn-on and turn-off specifications . 27
Table 12 – Remote control items . 30
Table 13 – Fundamental specification of data communication . 31
Table 14 – Content of data packets . 31
Table 15 – R-ONU address . 32
Table 16 – Recommendation for timing of data transmission. 33
Table 17 – Remote control command codes . 33
Table 18 – Specification of modulation for the remote control signal . 34
Table 19 – Data publication requirements for return path optical receivers . 35
Table 20 – Performance requirements for optical return path receivers . 35
Table C.1 – Operating conditions related to ODN parameters . 42
Table C.2 – Operating conditions related to ODN parameters . 43
Table C.3 – Environmental conditions for system evaluation . 43
Table C.4 – Factors affecting the transmission loss of ODN . 45
Table C.5 – System design example 1 . 45
Table C.6 – System design example 2 . 45
Table C.7 – Example of list of measurement conditions . 46
Table C.8 – Presentation of OBI measurement results . 47
Table C.9 – Presentation of OBI measurement results . 48
Table D.1 – Performance requirements for the FSK transmitter . 49
IEC 60728-14:2014 © IEC 2014 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –
Part 14: Optical transmission systems using RFoG technology
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,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
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 60728-14 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.
The text of this standard is based on the following documents:
FDIS Report on voting
100/2248/FDIS 100/2284/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
– 6 – IEC 60728-14:2014 © IEC 2014
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.
This standard follows closely (where applicable) the ANSI/SCTE 174 2010 standard “Radio
Frequency over Glass / Fiber-to-the-Home Specification”. In agreement with SCTE major
parts of ANSI/SCTE 174:2010 have been copied into this standard.
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.
___________
SCTE = Society of Cable Telecommunications Engineers
IEC 60728-14:2014 © IEC 2014 – 7 –
INTRODUCTION
Standards and other deliverables of the IEC 60728 series deal with cable networks including
equipment and associated methods of measurement for headend reception, processing and
distribution of television and sound signals and for processing, interfacing and transmitting all
kinds of data signals for interactive services using all applicable transmission media. These
signals are typically transmitted in networks by frequency-multiplexing techniques.
• regional and local broadband cable networks,
• extended satellite and terrestrial television distribution systems,
• individual satellite and terrestrial television receiving systems,
and all kinds of equipment, systems and installations used in such cable networks, distribution
and receiving systems.
The extent of this standardization 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 of the customer
premises equipment.
The standardization work will consider coexistence with users of the RF spectrum in wired and
wireless transmission systems.
The standardization 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 Annexes provide the following information.
Annex A describes implementation notes with design consideration based on this standard
Annex B describes the system loss specification
Annex C describes multiple CMTS operation
Annex D contains specifications for an optional remote control system
Annex E gives a design guideline of housings for R-ONU protection
Annex F contains information on the effect of off-state optical power on C/N ratio of
transmission signal
– 8 – IEC 60728-14:2014 © IEC 2014
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –
Part 14: Optical transmission systems using RFoG technology
1 Scope
This part of IEC 60728 describes the system and equipment specification of FTTH/FTTB (fibre
to the home/fibre to the building) networks where information is transmitted in both, forward
and return path directions using RF subcarrier multiplexing technology, and where the return
path transmission uses additionally time division multiple access technique imposed by the
transmission of the return path signals using a TDMA (e.g. TDMA mode of DOCSIS) protocol.
Such systems are called RF over Glass (RFoG) and consist of an RFoG optical network unit
(R-ONU), an optical distribution network based on xPON structure, and an RFoG optical return
path receiver. This standard specifies the basic system parameters and methods of
measurement for RFoG systems in order to assess the system performance and its
performance limits.
The detailed description of physical layer is out of the scope of this standard and it does not
include IP transport technologies.
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.
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 h +
12 h cycle)
IEC 60068-2-31, Environmental testing – Part 2-31: Tests – Test Ec: Rough handling shocks,
primarily for equipment-type specimens
IEC 60068-2-40, Environmental testing – Part 2-40: Tests – Test Z/AM: Combined cold/low air
pressure tests
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 60728-14:2014 © IEC 2014 – 9 –
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 of equipment
IEC 60728-3, Cable networks for television signals, sound signals and interactive services –
Part 3: Active wideband equipment for cable networks
IEC 60728-6:2011, Cable networks for television signals, sound signals and interactive
services – Part 6: Optical equipment
IEC 60728-10:2014, Cable networks for television signals, sound signals and interactive
services – Part 10: System performance of return path
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 60728-13-1:2012, Cable networks for television signals, sound signals and interactive
services – Part 13-1: Bandwidth expansion for broadcast signal over FTTH system
IEC 60793-2-50:2012, Optical fibres – Part 2-50: Product specifications – Sectional
specification for class B single-mode fibres
IEC 60794-3-11:2010, Optical fibre cables – Part 3-11: Outdoor cables – Product specification
for duct, directly buried, and lashed aerial single-mode optical fibre telecommunication cables
IEC 60825-1, Safety of laser products – Part 1: Equipment classification and requirements
IEC 61169-2, Radio-frequency connectors – Part 2: Sectional specification – Radio frequency
coaxial connectors type 9,52
IEC 61169-24, Radio-frequency connectors – Part 24: Sectional specification – Radio-
frequency coaxial connectors with screw coupling, typically for use in 75 ohm cable distribution
systems (Type F)
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 test procedures – Part 1-3: General
communication subsystems – Central wavelength and spectral width measurement
IEC 61754-4, Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces – Part 4: Type SC connector family
IEC/TR 61931:1998, Fibre optics – Terminology
IEEE Standard 802.3-2008, Carrier sense multiple access with Collision Detection (CSMA/CD)
Access Method and Physical Layer Specifications (Includes the EPON standard). See also
subsequent corrigenda
– 10 – IEC 60728-14:2014 © IEC 2014
IEEE Standard 802.3av-2009, IEEE Standard for Information Technology-Part 3: Amendment 1:
Physical Layer Specifications and Management Parameters for 10Gb/s Passive Optical
Networks, October 2009
3 Terms, definitions, symbols and abbreviations
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60728-1 and
IEC/TR 61931 as well as the following apply.
3.1.1
carrier-to-crosstalk ratio
CCR
level difference of desired signal carrier level and worst case of other services single frequency
crosstalk signal measured at RF output port of optical receiver
Note 1 to entry: CCR is defined by the following equation:
CCR = D −U
(1)
OtherService
where
D is the nominal level of the desired signal in dB(µV) at RF output port of optical receiver;
is the worst case level of another service’s single frequency crosstalk in dB(µV) at RF output port
U
OtherService
of the optical receiver.
Note 2 to entry: CCR is expressed in dB.
3.1.2
equivalent input noise current density
notional input noise current density which, when applied to the input of an ideal noiseless
device, produces an output noise current density equal in value to that observed at the output
of the actual device under consideration
Note 1 to entry: It can be calculated from the carrier-to-noise ratio C/N (see IEC 60728-6) of a device or system
using:
C
=
I
r
(2)
C/N
Z
where
C is the power of the carrier at the input of the device or system, in W/Hz;
Z is its input impedance, in Ω.
Note 2 to entry: The equivalent input noise current density is expressed in A/√Hz.
3.1.3
extended satellite television distribution network or system
distribution network or system designed to provide sound and television signals received by
satellite receiving antenna to households in one or more buildings
Note 1 to entry: This kind of network or system can be combined with terrestrial antennas for the additional
reception of TV and/or radio signals via terrestrial networks.
Note 2 to entry: This kind of network or system can also carry control signals for satellite switched systems or
other signals for special transmission systems (e.g. MoCA or WiFi) in the return path direction.
IEC 60728-14:2014 © IEC 2014 – 11 –
3.1.4
extended terrestrial television distribution network or system
distribution network or system designed to provide sound and television signals received by
terrestrial receiving antenna to households in one or more buildings
Note 1 to entry: This kind of network or system can be combined with a satellite antenna for the additional
reception of TV and/or radio signals via satellite networks.
Note 2 to entry: This kind of network or system can also carry other signals for special transmission systems (e.g.
MoCA or WiFi) in the return path direction.
3.1.5
fibre optic branching device
branching device
splitter
DEPRECATED: coupler
device, possessing three or more optical ports, which shares optical power among its ports in a
predetermined fashion, at the same wavelength or wavelengths, without wavelength conversion
Note 1 to entry: The ports may be connected to fibres, sources, detectors, etc.
[SOURCE: IEC/TR 61931:1998, definition 2.6.21]
3.1.6
flatness
difference between the maximum and the minimum RF gain or attenuation not taking into
account the slope within the specified modulation frequency range of a device or system
3.1.7
headend system
system comprising modulators, demodulators, CMTS, an optical transmitter with optional
optical amplifiers and a WDM for the transmission of analogue video as well as digitally
modulated signals located at the central office side of the optical network
Note 1 to entry: The headend system is equipped with an optical return path receiver receiving digitally modulated
signals of data in the return path direction to enable e.g. VoIP, VOD and internet services.
Note 2 to entry: V-OLT is a part of the headend system and deals with video transmission in the forward path only.
3.1.8
individual satellite television receiving system
system designed to provide sound and television signals received from satellite(s) to an
individual household
Note 1 to entry: This kind of system can also carry control signals for satellite switched systems or other signals
for special transmission systems (e.g. MoCA or WiFi) in the return path direction.
3.1.9
individual terrestrial television receiving system
system designed to provide sound and television signals received via terrestrial broadcast
networks to an individual household
Note 1 to entry: This kind of system can also carry other signals for special transmission systems (e.g. MoCA or
WiFi) in the return path direction.
3.1.10
local broadband cable network
network designed to provide sound and television signals as well as signals for interactive
services to a local area (e.g. one town or one village)
– 12 – IEC 60728-14:2014 © IEC 2014
3.1.11
multiplexing device
WDM device
wavelength selective branching device (used in WDM transmission systems) in which optical
signals can be transferred between two predetermined ports, depending on the wavelength of
the signal
[SOURCE: IEC/TR 61931:1998, definition 2.6.51]
3.1.12
noise power ratio
NPR
ratio of the signal power density to the power density of the combined noise and
intermodulation distortion
3.1.13
off-state optical power
residual optical output power emitted from the fibre of the R-ONU when the laser is switched to
off-state
Note 1 to entry: In a typical burst mode transmitter, for fast switching operation, the laser bias may be kept near
the threshold bias level to avoid turn-on and turn-off delays. The off-state optical power affects the system
performance when a large number of transmitters are connected to the same distribution network.
3.1.14
optical amplifier
OA
optical waveguide device containing a suitably pumped, active medium which is able to amplify
an optical signal
[SOURCE: IEC/TR 61931:1998, definition 2.7.75]
3.1.15
optical distribution network
ODN
passive optical network (PON) mainly co
...
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