IEC 60728-115:2022

Cable networks for television signals, sound signals and interactive services - Part 115: In-building optical systems for broadcast signal transmissions

IEC 60728-115:2022 is applicable to in-building optical transmission systems for broadcast signal transmission that consist of optical transmitters, optical amplifiers, splitters, V-ONUs, etc. These systems are primarily intended for television and sound signals using digital transmission technology. This document specifies the basic system parameters and methods of measurement for in-building optical distribution systems between building network interfaces (BNI) and home network interfaces (HNI) in order to assess the system's performance and its performance limits.
This document is also applicable to broadcast signal transmission using a telecommunication network if it satisfies the requirements of the optical portion of this document. This document describes RF transmission for fully digitalized broadcast and narrowcast (limited area distribution of broadcast) signals over an FTTH network and introduces the X-PON system as a physical layer media. The detailed description of the physical layer is out of the scope of this document. The scope is limited to RF signal transmission over optical networks; thus, it does not include IP transport technologies, such as IP multicast and associated protocols.
This document specifies the required system performance of all-optical building networks in order to establish connections with FTTH networks, which are defined by IEC 60728-113 and IEC 60728-13-1. Use of in-building optical networks is very effective for saving costs (installation and maintenance) and enabling future network upgrades, especially in huge apartment buildings.

Réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion sonore et services interactifs - Partie 115: Systèmes optiques internes aux immeubles pour la transmission de signaux de diffusion

L'IEC 60728-115:2022 s'applique aux systèmes de transmission optique internes aux immeubles pour la transmission de signaux de diffusion. Ces systèmes se composent d'émetteurs optiques, d'amplificateurs optiques, de répartiteurs, de V-ONU, etc. Ils sont principalement prévus pour la télévision et les signaux sonores qui utilisent une technologie de transmission numérique. Le présent document spécifie les paramètres de base du système et les méthodes de mesure des systèmes de distribution optique internes aux immeubles entre les interfaces de réseau de bâtiment (BNI, Building Network Interfaces) et les interfaces de réseau domestique (HNI, Home Network Interfaces), afin d'évaluer les performances du système et ses limites de performances.
Le présent document s'applique également à la transmission des signaux de diffusion par un réseau de télécommunication, si celui-ci satisfait aux exigences de la partie du présent document consacrée à l'optique. Le présent document décrit la transmission de signaux radiofréquence en tant que signaux de diffusion générale et de diffusion ciblée (distribution de la diffusion dans une zone limitée) entièrement numérisés sur un réseau de desserte par fibre de l'abonné et introduit le système X-PON comme support de la couche physique. La description précise de la couche physique ne fait pas partie du domaine d'application du présent document. Etant donné que le domaine d'application se limite à la transmission des signaux RF sur les réseaux optiques, les technologies de transport par protocole Internet (IP), comme la multidiffusion IP et les protocoles associés, ne sont pas incluses.
Le présent document spécifie les performances système exigées de réseaux entièrement optiques d'immeubles afin d'établir des connexions aux réseaux de desserte par fibre des abonnés, définis dans l'IEC 60728-113 et I'IEC 60728-13-1. L'utilisation de réseaux optiques internes aux immeubles est très efficace pour réduire les coûts (installation et maintenance) et permettre de futures améliorations, en particulier dans les grands immeubles résidentiels.

General Information

• Status: Published
• Publication Date: 02-Feb-2022
• ICS: 33.060.40 - Cabled distribution systems
• ICS: 33.160.01 - Audio, video and audiovisual systems in general
• ICS: 33.180.01 - Fibre optic systems in general
• Technical Committee: TA 5 - Cable networks for television signals, sound signals and interactive services
• Drafting Committee: WG 5 - TC 100/TA 5/WG 5
• Current Stage: PPUB - Publication issued
• Start Date: 03-Feb-2022
• Completion Date: 25-Feb-2022

Standards Content (Sample)

IEC 60728-115 ®
Edition 1.0 2022-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Cable networks for television signals, sound signals and interactive services –
Part 115: In-building optical systems for broadcast signal transmissions

Réseaux de distribution par câbles pour signaux de télévision, signaux de
radiodiffusion sonore et services interactifs –
Partie 115: Systèmes optiques internes aux immeubles pour la transmission de
signaux de diffusion
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IEC 60728-115 ®
Edition 1.0 2022-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Cable networks for television signals, sound signals and interactive services –

Part 115: In-building optical systems for broadcast signal transmissions

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

radiodiffusion sonore et services interactifs –

Partie 115: Systèmes optiques internes aux immeubles pour la transmission de

signaux de diffusion
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.060.40; 33.160.01; 33.180.01 ISBN 978-2-8322-1071-5

– 2 – IEC 60728-115:2022 © IEC 2022
CONTENTS
FOREWORD . 8
1 Scope . 10
2 Normative references . 10
3 Terms, definitions, graphical symbols and abbreviated terms. 11
3.1 Terms and definitions . 11
3.2 Graphical symbols . 15
3.3 Abbreviated terms . 16
4 In-building optical system reference model . 17
4.1 General . 17
4.2 Over-all FTTH system reference model . 18
4.3 Individual reference model . 18
5 Methods of measurement . 21
5.1 Measuring points and items . 21
5.1.1 General . 21
5.1.2 Measuring points . 21
5.1.3 Measured parameters . 21
5.2 General measurement requirements . 22
5.2.1 Input specification . 22
5.2.2 Standard measurement conditions . 22
5.2.3 Precautions for measurements . 22
5.3 Optical power . 22
5.3.1 General . 22
5.3.2 Measurement of the optical power at a single wavelength . 22
5.3.3 Measurement of the optical power of a WDM signal . 22
5.3.4 Presentation of the results . 23
5.4 Optical wavelength. 23
5.4.1 General . 23
5.4.2 Method of measurement . 23
5.4.3 Presentation of the results . 23
5.5 Relative intensity noise (RIN) of optical signal . 23
5.5.1 General . 23
5.5.2 Method of measurement . 24
5.5.3 Presentation of the results . 24
5.6 SINR (signal-to-intermodulation and noise ratio) less than 1 GHz . 24
5.6.1 General . 24
5.6.2 Measurement setup . 24
5.6.3 Measuring method . 24
5.6.4 Presentation of the results . 24
5.7 System BER . 24
5.7.1 General . 24
5.7.2 Measurement setup . 25
5.7.3 Measurement method . 25
5.7.4 Presentation of the results . 25
5.8 System loss budget . 25
5.8.1 General . 25
5.8.2 Measurement method . 25
5.8.3 Calculation of loss budget . 25

5.8.4 Basic configuration . 26
5.8.5 Presentation of the results . 27
5.9 In-band frequency characteristics between optical transmitter and V-ONU . 27
5.9.1 General . 27
5.9.2 Measurement setup . 27
5.9.3 Measuring method . 27
5.9.4 Presentation of the results . 28
5.10 SINR (signal-to-intermodulation and noise ratio) of satellite broadcast
signals . 28
5.10.1 General . 28
5.10.2 Measurement setup . 29
5.10.3 Equipment required . 29
5.10.4 Measurement procedure . 29
5.10.5 Presentation of results . 30
5.11 SINR versus BER. 30
5.11.1 General . 30
5.11.2 Measurement setup . 30
5.11.3 Equipment required . 30
5.11.4 Measurement procedure . 31
5.11.5 Measurement of result . 32
5.12 Modulation error ratio (MER) . 33
5.12.1 General . 33
5.12.2 Connection of the equipment . 33
5.12.3 Measurement procedure . 33
5.12.4 Presentation of the results . 33
6 Simplified measurement method for system introduction and maintenance . 34
6.1 General . 34
6.2 Requirements for simplified measurement . 35
6.2.1 General . 35
6.2.2 Measurement conditions . 35
6.2.3 Measurement requirements . 36
6.3 Measurement tools . 36
6.4 An estimation of equivalent SINR by MER . 36
6.4.1 General . 36
6.4.2 Relationship between SINR and MER . 36
6.4.3 Note for using handheld MER measurement device . 37
7 Specification of in-building optical systems for digital broadcast signal
transmission . 37
7.1 General . 37
7.2 Specified performance points and parameters to be measured for type A . 38
7.2.1 Overview . 38
7.2.2 Optical power specification for type A . 38
7.2.3 Optical wavelength specification for type A . 39
7.2.4 RIN specification for type A . 39
7.2.5 SINR specification for type A . 39
7.2.6 BER specification for type A . 39
7.2.7 MER of signal for type A . 39
7.2.8 System loss budget for type A . 40
7.2.9 In-band frequency characteristics for type A . 40

– 4 – IEC 60728-115:2022 © IEC 2022
7.2.10 RF/IF signal level for type A . 40
7.3 Performance specified points and parameters to be measured for type B . 40
7.3.1 Overview . 40
7.3.2 Optical power specification for type B . 41
7.3.3 Optical wavelength specification for type B . 41
7.3.4 RIN specification for type B . 42
7.3.5 SINR specification for type B . 42
7.3.6 BER specification for type B . 42
7.3.7 MER of signal for type B . 42
7.3.8 System loss budget for type B . 43
7.3.9 In-band frequency characteristics for type B . 43
7.3.10 RF/IF signal specification level for type B . 43
7.4 Performance specified points and parameters to be measured for type C . 43
7.4.1 Overview . 43
7.4.2 Optical power specification for type C . 44
7.4.3 Optical wavelength specification for type C . 45
7.4.4 SINR specification for type C . 45
7.4.5 BER specification for type C . 45
7.4.6 MER of signal for type C . 45
7.4.7 System loss budget for type C . 46
7.4.8 In-band frequency characteristics for type C . 46
7.4.9 RF/IF signal level specification for type C . 46
7.5 Performance specified points and parameters to be measured for type D . 46
7.5.1 Overview . 46
7.5.2 Optical power specification for type D . 47
7.5.3 Optical wavelength specification for type D . 47
7.5.4 BER specification for type D . 47
7.5.5 MER of signal for type D . 48
7.5.6 System loss budget for type D . 48
7.5.7 RF/IF signal level specification for type D . 48
7.6 Minimum signal performance for in-building systems . 48
7.6.1 General . 48
7.6.2 Minimum MER performance . 49
Annex A (informative) Consideration of the home network interface (HNI) . 50
A.1 General . 50
A.2 Positioning of the HNI in the optical system . 50
A.3 Towards a new service . 51
Annex B (informative) Simplified measurement method . 52
B.1 General . 52
B.2 Measurement features of TV field strength meter . 52
B.2.1 Complete channel status on a single-screen display . 52
B.2.2 Features to confirm picture and sound signal status . 52
B.3 Method of measurement . 53
Annex C (informative) Simplified in-building RF signal leakage detection system . 56
C.1 General . 56
C.2 Example of simplified in-building RF signal leakage detection . 56
C.3 Simplified in-home RF signal leakage detection . 57
Annex D (informative) Optical cable for the in-building systems . 59

D.1 General . 59
D.2 Optical cable for an in-building system . 59
Annex E (informative) Total optical modulation index . 60
E.1 General . 60
E.2 Number of channels and optical modulation index (in the case of Japan) . 60
Annex F (informative) Actual system of in-building optical network (in Japan) . 62
F.1 General . 62
F.2 Loss budget for type A, B and C . 62
Bibliography . 66

Figure 1 – Example of the FTTH system for television and sound signals
(IEC 60728‑113) . 19
Figure 2 – Type A reception and re-transmission . 20
Figure 3 – Type B reception and re-transmission . 20
Figure 4 – Type C reception and re-transmission . 20
Figure 5 – Type D reception and re-transmission . 20
Figure 6 – Measuring points for type A, B, C and D. . 21
Figure 7 – Measurement setup for optical power measurement using a WDM filter . 23
Figure 8 – Measurement setup for optical power measurement using a WDM coupler . 23
Figure 9 – Measurement setup for RF signal-to-intermodulation and noise ratio . 24
Figure 10 – Setup for BER measurement . 25
Figure 11 – Basic configuration of an in-building optical system . 27
Figure 12 – Setup for the measurement of in-band frequency characteristics . 28
Figure 13 – Measurement example of in-band frequency characteristics . 28
Figure 14 – Setup for the measurement of SINR for satellite broadcast signals . 29
Figure 15 – Setup for BER versus SINR measurement . 30
Figure 16 – Extrapolation method of BER measurement . 31
Figure 17 – Example of BER versus SINR characteristics . 32
Figure 18 – Setup for MER measurement . 33
Figure 19 – Example of result of MER measurement (64 QAM modulation format) . 34
Figure 20 – Example of a simplified signal measurement setup . 36
Figure 21 – Relationship between MER and SINR . 37
Figure 22 – Performance specified points for type A . 38
Figure 23 – Performance specified points for type B . 41
Figure 24 – Performance specified points for type C . 44
Figure 25 – Performance specified points for type D . 46
Figure A.1 – Two-fibre configuration . 50
Figure A.2 – One-fibre configuration . 51
Figure B.1 – Example of TV field strength meter . 52
Figure B.2 – Example of displaying measurement results . 53
Figure B.3 – Example of TV display screen of the TV field strength meter . 53
Figure B.4 – Example measurement: adjusting antenna direction . 54
Figure B.5 – Measurement example: display channel list and measurement values . 54
Figure B.6 – Measurement example: display the TV picture . 54

– 6 – IEC 60728-115:2022 © IEC 2022
Figure C.1 – Example of simplified RF signal leakage detection setup . 57
Figure C.2 – Example of in-home RF signal leakage detection . 58
Figure F.1 – Network configuration and loss budget for type A . 63
Figure F.2 – Network configuration and loss budget for type B . 64
Figure F.3 – Network configuration and loss budget for type C . 65

Table 1 – Signal level . 13
Table 2 – Optical wavelength for FTTH systems . 17
Table 3 – Frequency ranges . 18
Table 4 – Number of splits and insertion loss of optical coupler (example) . 26
Table 5 – Example of optical loss . 26
Table 6 – Measurement items for simplified signal measurement . 35
Table 7 – Measuring points and parameters to be measured for type A . 38
Table 8 – Optical power specification for type A . 38
Table 9 – Optical wavelength specification for type A . 39
Table 10 – RIN specification for type A . 39
Table 11 – SINR specification for type A . 39
Table 12 – BER specification for type A . 39
Table 13 – MER of signal for type A . 40
Table 14 – System loss budget specification for type A . 40
Table 15 – In-band frequency characteristics specification for type A . 40
Table 16 – RF/IF signal level specification for type A . 40
Table 17 – Measuring points and parameters to be measured for type B . 41
Table 18 – Optical power specification for type B . 41
Table 19 – Optical wavelength specification for type B . 42
Table 20 – RIN specification for type B . 42
Table 21 – SINR specification for type B . 42
Table 22 – BER specification for type B . 42
Table 23 – MER of signal for type B . 43
Table 24 – System loss budget specification for type B . 43
Table 25 – In-band frequency characteristics for type B . 43
Table 26 – RF/IF signal level specification for type B . 43
Table 27 – Measuring points and parameters to be measured for type C . 44
Table 28 – Optical power specification for type C . 44
Table 29 – Optical wavelength specification for type C . 45
Table 30 – SINR specification for type C . 45
Table 31 – BER specification for type C . 45
Table 32 – MER of signal for type C . 45
Table 33 – System loss budget specification for type C . 46
Table 34 – In-band frequency characteristics for type C . 46
Table 35 – RF/IF signal level specification for type C . 46
Table 36 – Measuring points and parameters to be measured for type D . 47
Table 37 – Optical power specification for type D . 47

Table 38 – Optical wavelength specification for type D . 47
Table 39 – BER specification for type D . 47
Table 40 – MER of signal for type D . 48
Table 41 – System loss budget specification for type D . 48
Table 42 – RF/IF signal level specification for type D . 48
a
Table 43 – Minimum MER performance for in-building systems . 49
Table D.1 – Optical cable to be used for an in-building system . 59
Table E.1 – Number of channels and optical modulation index (in the case of Japan) . 61

– 8 – IEC 60728-115:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –

Part 115: In-building optical systems for broadcast signal transmissions

FOREWORD
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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.
IEC 60728-115 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. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
100/3705/FDIS 100/3721/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.

A list of all parts in the IEC 60728 series, published under the general title Cable networks for
television signals, sound signals and interactive services, can be found on the IEC website.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

– 10 – IEC 60728-115:2022 © IEC 2022
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –

Part 115: In-building optical systems for broadcast signal transmissions

1 Scope
This part of IEC 60728 is applicable to in-building optical transmission systems for broadcast
signal transmission that consist of optical transmitters, optical amplifiers, splitters, V-ONUs, etc.
These systems are primarily intended for television and sound signals using digital transmission
technology. This document specifies the basic system parameters and methods of
measurement for in-building optical distribution systems between building network interfaces
(BNI) and home network interfaces (HNI) in order to assess the system's performance and its
performance limits.
This document is also applicable to broadcast signal transmission using a telecommunication
network if it satisfies the requirements of the optical portion of this document. This document
describes RF transmission for fully digitalized broadcast and narrowcast (limited area
distribution of broadcast) signals over an FTTH network and introduces the X-PON system as
a physical layer media. The detailed description of the physical layer is out of the scope of this
document. The scope is limited to RF signal transmission over optical networks; thus, it does
not include IP transport technologies, such as IP multicast and associated protocols.
This document specifies the required system performance of all-optical building networks in
order to establish connections with FTTH networks, which are defined by IEC 60728-113 and
IEC 60728-13-1. Use of in-building optical networks is very effective for saving costs
(installation and maintenance) and enabling future network upgrades, especially in huge
apartment buildings.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 60728-6:2011, Cable networks for television signals, sound signals and interactive services
– Part 6: Optical equipment
IEC 60728-101:2016, Cable networks for television signals, sound signals and interactive
services – Part 101: System performance of forward paths loaded with digital channels only
IEC 60728-113:2018, Cable networks for television signals, sound signals and interactive
services – Part 113: Optical systems for broadcast signal transmissions loaded with digital
channels only
IEC 60728-13-1:2017, Cable networks for television signals, sound signals and interactive
services – Part 13-1: Bandwidth expansion for broadcast signal over FTTH system
IEC 60825-1, Safety of laser products – Part 1: Equipment classification and requirements
IEC 60825-2, Safety of laser products – Part 2: Safety of optical fibre communication systems
(OFCSs)
IEC 60825-12, Safety of laser products – Part 12: Safety of free space optical communication
systems used for transmission of information
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 – Measurement of central wavelength, spectral width and additional
spectral characteristics
3 Terms, definitions, graphical symbols and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1.1
BER
bit error ratio
ratio between erroneous bits and the total number of transmitted bits
[SOURCE: IEC 60728-1:2014, 3.1.9]
3.1.2
central wavelength
average of those wavelengths at which the amplitude of a light source reaches or last falls to
half of the maximum amplitude
[SOURCE: IEC 60728-6:2011, 3.1.23, modified – The term "centre wavelength" has been
replaced by "central wavelength".]
3.1.3
MER
modulation error ratio
sum of the sequence of the squares of the magnitudes of the ideal symbol vector divided by the
sum of the squares of magnitudes of the symbol error vectors of a sequence of symbols
[SOURCE: IEC 60728-1:2014, 3.1.61, modified – The note to entry has been omitted.]
3.1.4
optical amplifier
optical waveguide device containing a suitably pumped, active medium which is able to amplify
an optical signal
Note 1 to entry: There are several methods based on wavelength can used for amplification. EDFA (erbium-doped
fibre amplifier) is used for the optical amplifier of cable television FTTH network.
[SOURCE: IEC TR 61931:1998, 2.7.75, modified – Note 1 to entry has been added.]
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