Cable networks for television signals, sound signals and interactive services - Part 10: System performance for return paths (IEC 60728-10:2014)

EN IEC 60728-10 specifies the transparent return path of cable networks operated in the frequency range between 5 MHz and 85 MHz or parts thereof. The upper frequency limit of the return path is reduced to 65 MHz where FM radio signals are transmitted in a cable network. Higher frequencies may be used in fibre based networks. Specifications of transmission systems (e.g. DOCSIS) are not within the scope of this standard.

Kabelnetze für Fernsehsignale, Tonsignale und interaktive Dienste - Teil 10: Rückweg-Systemanforderungen (IEC 60728-10:2014)

Réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion sonore et services interactifs - Partie 10: Caractéristiques des systèmes de voie de retour (CIE 60728-10:2014)

L'IEC 60728-10:2014 spécifie la voie de retour transparente des réseaux de distribution par câbles fonctionnant dans la totalité ou des parties de la bande de fréquences située entre 5 MHz et 85 MHz. La limite supérieure de fréquence de la voie de retour, pour laquelle les signaux radio FM sont transmis dans un réseau de distribution par câbles, est réduite à 65 MHz. Des fréquences plus élevées peuvent être utilisées dans des réseaux à fibres optiques. Cette troisième édition annule et remplace la deuxième édition publiée en 2005 dont elle constitue une révision technique. Elle inclut les modifications suivantes: - mise à jour de l'état de la technique de la transmission de voie de retour dans les réseaux de distribution par câbles; - dispositions pour les normes DOCSIS 3.0 et EuroDOCSIS 3.0 relatives à la transmission; - révision du paragraphe 4.3 sur la mesure des niveaux de canaux; - nouveau paragraphe 4.12 relatif à la méthode de mesure du rapport de puissance de bruit sur voie de retour; - nouveau paragraphe 4.13 relatif aux mesures à 10 porteuses; - nouveau paragraphe 4.14 relatif à la méthode de mesure du rapport d'erreur de modulation (MER); - révision du paragraphe 5.2, par rapport aux paramètres analogiques qui influencent les performances du système.

Kabelska omrežja za televizijske in zvokovne signale ter interaktivne storitve - 10. del: Lastnosti sistema za povratne poti (IEC 60728-10:2014)

Standard EN IEC 60728-10 določa pregledno povratno pot kabelskih omrežij, ki delujejo v frekvenčnem območju med 5 in 85 MHz. Kadar se radijski signali prenašajo prek kabelskega omrežja, se zgornja frekvenčna meja povratne poti zniža na 65 MHz. V optičnih omrežjih se lahko uporabijo višje frekvence. Ta standard ne obsega specifikacij prenosnih sistemov (npr. DOCSIS).

General Information

Status
Published
Publication Date
01-Sep-2014
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
18-Jun-2014
Due Date
23-Aug-2014
Completion Date
02-Sep-2014

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SLOVENSKI STANDARD
SIST EN 60728-10:2014
01-oktober-2014
1DGRPHãþD
SIST EN 50083-10:2003
SIST EN 60728-10:2008

Kabelska omrežja za televizijske in zvokovne signale ter interaktivne storitve - 10.

del: Lastnosti sistema za povratne poti (IEC 60728-10:2014)

Cable networks for television signals, sound signals and interactive services - Part 10:

System performance for return paths (IEC 60728-10:2014)

Kabelnetze für Fernsehsignale, Tonsignale und interaktive Dienste - Teil 10: Rückweg-

Systemanforderungen (IEC 60728-10:2014)

Réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion

sonore et services interactifs - Partie 10: Caractéristiques des systèmes de voie de

retour (CIE 60728-10:2014)
Ta slovenski standard je istoveten z: EN 60728-10:2014
ICS:
33.060.40 Kabelski razdelilni sistemi Cabled distribution systems
SIST EN 60728-10:2014 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60728-10:2014
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SIST EN 60728-10:2014
EUROPEAN STANDARD EN 60728-10
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2014
ICS 33.060.40 Supersedes EN 50083-10:2002, EN 60728-10:2006
English Version
Cable networks for television signals, sound signals and
interactive services - Part 10: System performance for return
paths
(IEC 60728-10:2014)

Réseaux de distribution par câbles pour signaux de Kabelnetze für Fernsehsignale, Tonsignale und interaktive

télévision, signaux de radiodiffusion sonore et services Dienste - Teil 10: Rückweg-Systemanforderungen

interactifs - Partie 10: Performances des systèmes de voie (IEC 60728-10:2014)
de retour
(CEI 60728-10:2014)

This European Standard was approved by CENELEC on 2014-04-15. 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 60728-10:2014 E
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SIST EN 60728-10:2014
EN 60728-10:2014 - 2 -
Foreword

The text of document 100/2247/FDIS, future edition 3 of IEC 60728-10, 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 60728-10:2014.
The following dates are fixed:
• latest date by which the document has to be (dop) 2015-01-15
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2017-04-15
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 50083-10:2002 and EN 60728-10:2006.

EN 60728-10:2014 includes the following significant technical changes with respect to

EN 60728-10:2006:
- update on the state-of-the-art of return path transmission in cable networks;
- provisions for DOCSIS 3.0 and EuroDOCSIS 3.0 transmission standards;
- revision of Subclause 4.3 on measurement of channel level;

- new Subclause 4.12 for method of measurement of noise power ratio (NPR) on return paths;

- new Subclause 4.13 for 10-tone measurements;
- new Subclause 4.14 for method of measurement of modulation error ratio (MER);

- revision of Subclause 5.2 on analogue parameters influencing system performance.

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 60728-10:2014 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 60728-3 NOTE Harmonized as EN 60728-3.
IEC 60728-4 NOTE Harmonized as EN 60728-4.
IEC 60728-6 NOTE Harmonized as EN 60728-6.
IEC 60728-11 NOTE Harmonized as EN 60728-11.
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SIST EN 60728-10:2014
- 3 - EN 60728-10:2014
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
Cable networks for television CLC/TR 50083-10-1 2009
signals, sound signals
and interactive services -
Part 10-1: Guidelines for the
implementation of return paths in
cable networks
IEC 60728 Series Cable networks for television signals, EN 60728 Series
sound signals and interactive services
IEC 60728-1 - Cable networks for television signals, EN 60728-1 -
sound signals and interactive services
- Part 1: System performance of
forward paths
IEC 60728-2 - Cable networks for television signals, EN 50083-2 -
sound signals and interactive services
- Part 2: Electromagnetic compatibility
for equipment
IEC 60728-5 - Cable networks for television signals, EN 60728-5 -
sound signals and interactive services
- Part 5: Headend equipment
IEC 60728-12 - Cabled distribution systems for EN 50083-8 -
television and sound signals -
Part 12: Electromagnetic compatibility
of systems
ISO/IEC 13818-1 2007 Information technology - Generic - -
coding of moving pictures and
associated audio information:
Systems
ITU-R - Conventional analogue television - -
Recommendation systems
BT.470
ETSI ES 200 800 - Digital Video Broadcasting (DVB); - -
DVB interaction channel for Cable TV
distribution systems (CATV)
Superseded by CLC/TR 50083-10-1:2014.
Superseded by ISO/IEC 13818-1:2013.
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SIST EN 60728-10:2014
EN 60728-10:2014 - 4 -
ETSI EN 302 878-2 2011 Access, Terminals, Transmission and - -
Multiplexing (ATTM); Third
Generation Transmission Systems for
Interactive Cable Television Services
- IP Cable Modems; Part 2: Physical
Layer; DOCSIS 3.0
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SIST EN 60728-10:2014
IEC 60728-10
Edition 3.0 2014-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Cable networks for television signals, sound signals and interactive services –
Part 10: System performance for return paths
Réseaux de distribution par câbles pour signaux de télévision, signaux de
radiodiffusion sonore et services interactifs –
Partie 10: Performances des systèmes de voie de retour
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XA
ICS 33.060.40 ISBN 978-2-8322-1438-1

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN 60728-10:2014
– 2 – IEC 60728-10:2014 © IEC 2014
CONTENTS

FOREWORD ........................................................................................................................... 6

INTRODUCTION ..................................................................................................................... 8

1 Scope .............................................................................................................................. 9

2 Normative references ...................................................................................................... 9

3 Terms, definitions, symbols and abbreviations ............................................................... 10

3.1 Terms and definitions ....................................................................................... 10

3.2 Symbols ........................................................................................................... 13

3.3 Abbreviations ................................................................................................... 14

4 Methods of measurement .............................................................................................. 14

4.1 General ............................................................................................................ 14

4.2 Set-up of the network ....................................................................................... 15

4.3 Measurement of channel level .......................................................................... 15

4.3.1 General .......................................................................................... 15

4.3.2 Equipment required ........................................................................ 15

4.3.3 Connection of the equipment .......................................................... 16

4.3.4 Measurement procedure for digitally modulated carriers ................. 16

4.3.5 Measurement procedure for intermittent digitally modulated

carriers ........................................................................................... 17

4.3.6 Presentation of the results .............................................................. 18

4.4 Measurement of amplitude response variation ................................................. 18

4.4.1 Background .................................................................................... 18

4.4.2 Equipment required ........................................................................ 18

4.4.3 Connection of the equipment .......................................................... 18

4.4.4 Calibration of equipment ................................................................. 18

4.4.5 Method of measurement ................................................................. 19

4.4.6 Presentation of the results .............................................................. 19

4.5 Measurement of signal to noise ratio (S /N) ................................................. 19

D,RF

4.5.1 General .......................................................................................... 19

4.5.2 Equipment required ........................................................................ 19

4.5.3 Connection of the equipment .......................................................... 19

4.5.4 Measurement procedure ................................................................. 19

4.5.5 Presentation of the results .............................................................. 20

4.6 Measurement of multiple interference .............................................................. 20

4.6.1 General .......................................................................................... 20

4.6.2 Equipment required ........................................................................ 21

4.6.3 Connection of the equipment .......................................................... 21

4.6.4 Measurement procedure ................................................................. 21

4.6.5 Processing of the data .................................................................... 21

4.6.6 Presentation of the results .............................................................. 21

Measurement of impulse noise ......................................................................... 22

4.7

4.7.1 General .......................................................................................... 22

4.7.2 Equipment required ........................................................................ 22

4.7.3 Connection of the equipment .......................................................... 22

4.7.4 Measurement procedure ................................................................. 22

4.7.5 Processing of the data and presentation of the results .................... 23

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SIST EN 60728-10:2014
IEC 60728-10:2014 © IEC 2014 – 3 –

4.8 Measurement of echo ratio ............................................................................... 23

4.8.1 General .......................................................................................... 23

4.8.2 Equipment required ........................................................................ 24

4.8.3 Connection of the equipment .......................................................... 25

4.8.4 Measurement procedure ................................................................. 25

4.8.5 Presentation of the results .............................................................. 25

4.9 Measurement of group delay variation.............................................................. 25

4.10 Measurement of frequency error ...................................................................... 26

4.10.1 General .......................................................................................... 26

4.10.2 Equipment required ........................................................................ 26

4.10.3 Connection of the equipment .......................................................... 26

4.10.4 Measurement procedure ................................................................. 26

4.10.5 Presentation of the result ................................................................ 27

4.11 Measurement of bit error ratio (BER) ............................................................... 27

4.11.1 General .......................................................................................... 27

4.11.2 Equipment required ........................................................................ 27

4.11.3 Connection of the equipment .......................................................... 28

4.11.4 Measurement procedure ................................................................. 28

4.11.5 Presentation of the results .............................................................. 28

4.12 Noise power ratio (NPR) measurement on return path ..................................... 28

4.12.1 General .......................................................................................... 28

4.12.2 Equipment required ........................................................................ 29

4.12.3 Connection of the equipment .......................................................... 29

4.12.4 Measurement procedure ................................................................. 30

4.12.5 Presentation of the results .............................................................. 31

4.12.6 Recommended correction factors .................................................... 31

4.12.7 Precautions during measurement .................................................... 32

4.12.8 NPR dynamic range ........................................................................ 32

4.13 10-Tone measurement ..................................................................................... 33

4.13.1 General .......................................................................................... 33

4.13.2 Measurement principle .................................................................... 34

4.13.3 Measurement procedure ................................................................. 34

4.14 Modulation error ratio (MER) measurement on return path ............................... 35

4.14.1 General .......................................................................................... 35

4.14.2 Equipment required ........................................................................ 36

4.14.3 Connection of the equipment .......................................................... 36

4.14.4 Measurement procedure ................................................................. 36

4.14.5 Presentation of the results .............................................................. 37

5 System performance requirements ................................................................................ 37

5.1 General ............................................................................................................ 37

5.2 Analogue parameters that influence the system performance ........................... 40

5.3 General requirements ...................................................................................... 42

5.3.1 Impedance ...................................................................................... 42

5.3.2 Maximum signal level ..................................................................... 42

5.4 Specific system performance requirements ...................................................... 42

6 System performance recommendations – Return path bandwidth .................................. 45

6.1 Frequency allocation ........................................................................................ 45

6.2 Transmission quality in the return path frequency ranges ................................. 45

Annex A (normative) Correction factors for noise ................................................................. 47

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SIST EN 60728-10:2014
– 4 – IEC 60728-10:2014 © IEC 2014

A.1 Signal level measurement ................................................................................ 47

A.2 Noise level measurement ................................................................................. 47

Annex B (normative) Correction factor for a spectrum analyser ............................................ 49

Annex C (normative) Null packet and PRBS definitions ........................................................ 50

C.1 Null packet definition ........................................................................................ 50

C.2 PRBS definition ................................................................................................ 51

Bibliography .......................................................................................................................... 52

Figure 1 – Reference points of an active return path system (example) ................................. 15

Figure 2 – Time domain representation of an upstream burst with marker on the

preamble of the DOCSIS signal ............................................................................................ 17

Figure 3 – Arrangement of test equipment for measurement of amplitude response

variation ................................................................................................................................ 18

Figure 4 − Echo rating graticule ............................................................................................ 24

Figure 5 – Arrangement of test equipment for measurement of echo ratio ............................. 25

Figure 6 – Test set-up for frequency stability measurement .................................................. 26

Figure 7 – Principle of BER measurement ............................................................................. 27

Figure 8 – Band-pass and band-stop filters response ............................................................ 29

Figure 9 – NPR test set up .................................................................................................... 30

Figure 10 – NPR versus RF power density applied at input of optical transmitter and

determination of OMI 100 % .................................................................................................. 31

Figure 11 – Example of the frequency response of the optional band-pass filter ................... 31

Figure 12 – Example of NPR dynamic range ......................................................................... 33

Figure 13 – Dynamic range plotted versus NPR .................................................................... 33

Figure 14 – Alternative NPR measurement principle ............................................................. 34

Figure 15 – Relationship between classical NPR method and multi-tone method .................. 35

Figure 16 – Test set-up for modulation error ratio (MER) measurement ................................ 36

Figure 17 – Example of constellation diagram for a 64QAM modulation format ..................... 37

Figure 18 – Return path signals affecting forward path signals .............................................. 38

Figure 19 – Forward path signals affecting return path signals .............................................. 39

Figure 20 – Return path signals of service 1 affecting return path signals of a different

service (e.g. service 2).......................................................................................................... 39

Figure 21 – Return path signals of a specific service (e.g. service 2) affecting return

path signals of the same service ........................................................................................... 39

Figure 22 – Identification of the most common sub-bands within the return path band

with limited transmission quality ............................................................................................ 46

Figure A.1 – Noise correction factor CF versus measured level difference D ......................... 48

Table 1 – Examples of the Nyquist bandwidth of digitally modulated carriers ........................ 16

Table 2 – Band-stop filter notch frequencies ......................................................................... 29

Table 3 – Summary of the requirements for MER according to ETSI EN 302 878-2,

V.1.1.1 (2011-11), (clause 6.2.22.3.2) ................................................................................... 41

Table 4 – System performance requirements for different modulation techniques for

BER = 10 .......................................................................................................................... 43

Table 5 – Comparison of system performance parameters given in Table 4 with those

given in ETSI EN 302 878-2, V.1.1.1 (2011-11), specifications.............................................. 44

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SIST EN 60728-10:2014
IEC 60728-10:2014 © IEC 2014 – 5 –

Table 6 – Return path frequency ranges ............................................................................... 45

Table 7 – Reasons for quality reduction in sub-bands of the return path ............................... 45

Table A.1 – Noise correction factor ....................................................................................... 47

Table C.1 – Null transport stream packet definition ............................................................... 51

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SIST EN 60728-10:2014
– 6 – IEC 60728-10:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –
Part 10: System performance for return paths
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 60728-10 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 2005 and constitutes a

technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
• update on the state-of-the-art of return path transmission in cable networks;
• provisions for DOCSIS 3.0 and EuroDOCSIS 3.0 transmission standards;
• revision of subclause 4.3 on measurement of channel level;

• new subclause 4.12 for method of measurement of noise power ratio (NPR) on return

paths;
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SIST EN 60728-10:2014
IEC 60728-10:2014 © IEC 2014 – 7 –
• new subclause 4.13 for 10-tone measurements;
• new subclause 4.14 for method of measurement of modulation error ratio (MER);

• revision of subclause 5.2 on analogue parameters influencing system performance.

The text of this standard is based on the following documents:
FDIS Report on voting
100/2247/FDIS 100/2283/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.

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 net

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