ETSI TS 102 447 V1.1.1 (2008-06)

Powerline Telecommunications (PLT); Programmable PSD Mask; Specifications for Access and Indoor Systems

DTS/PLT-00009

General Information

• Status: Published
• Publication Date: 25-Jun-2008
• Technical Committee: PLT - Powerline Telecommunications
• Current Stage: 12 - Completion
• Due Date: 30-Jul-2008
• Completion Date: 26-Jun-2008

Standards Content (Sample)

ETSI TS 102 447 V1.1.1 (2008-06)
Technical Specification


Powerline Telecommunications (PLT);
Programmable PSD Mask;
Specifications for Access and Indoor Systems

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2 ETSI TS 102 447 V1.1.1 (2008-06)



Reference
DTS/PLT-00009
Keywords
access, network, powerline
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3 ETSI TS 102 447 V1.1.1 (2008-06)
Contents
Intellectual Property Rights.4
Foreword.4
Introduction .4
1 Scope.5
2 References.5
2.1 Normative references.5
2.2 Informative references.5
3 Definitions and abbreviations.6
3.1 Definitions.6
3.2 Abbreviations.7
4 Transmitter power back off .7
5 Notching.7
5.1 Notches frequency locations.7
5.2 Notch activation mechanisms.7
5.2.1 Automatic Modem Initiative.7
5.2.1.1 Inquiry to the Outside.7
5.2.1.2 Autonomous configuration.8
5.2.2 External initiative.8
5.2.2.1 Local Initiative .8
5.2.2.2 Remote, OMC (Operations Maintenance Centre), Initiative.8
5.3 Notch activation characteristics.8
5.4 Specification of PSD Notch characteristics.9
5.4.1 Depth: Level of the Power Spectral Density (PSD) in the notch .9
5.4.2 Width of the notch .9
5.4.2.1 Scalability of bandwidth .9
5.4.3 Number of programmable notches.9
5.4.4 Minimum Total Notched Bandwidth .9
6 Verification of the PSD .9
Annex A (informative): Examples of measurement circuits.11
History .13

ETSI

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4 ETSI TS 102 447 V1.1.1 (2008-06)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server)
which are, or may be, or may become, essential to the present document.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Powerline Telecommunications
(PLT).
The present document describes the requirements for the programmable PSD mask for PLT Access Network systems
and PLT Indoor systems.
Introduction
The PLT equipment integration involves the development of technology within two main layer architectures: the
physical layer and network layer. The Physical layer deals with the electrical systems while the network layer deals with
the transmission technology.
The integration of the physical and network layer technologies allows high-speed data to be transmitted over existing
utility power lines to customers' premise.
In order to modulate the EMC behaviour of PLT transceivers, the PSD mask can be reshaped by introducing notches
corresponding to sensitive frequency bands in specific locations, as it is for instance performed in VDSL [2].
The mechanisms for defining notches over the PSD mask of a PLT device specified in the present document are very
useful in the very specific areas where interferences might be encountered. For these reasons it is useful to have the
PSD mask of the PLT devices to be programmable in order to better coexist with other users of the spectrum.
PSD programmability can be applied to provide spectral compatibility between PLT applications and non-PLT
applications.
Narrow band radio signals may couple onto the electrical lines. This effect may interfere with the PLT operation. The
programmable PSD specifications defined in the present document will enhance the performance of the PLT network
by avoiding the frequencies of the interference.
The present document specifies the programmability of the PSD mask and the activation of notches for PLT modems to
ensure coexistence with radio services locally used in the specific neighbourhood where a PLT system is deployed.
ETSI

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5 ETSI TS 102 447 V1.1.1 (2008-06)
1 Scope
The present document specifies PSD characteristics for high frequency PLT transceivers providing digital transmission
on power cables. The present document is applicable to a modem in a PLT access transmission systems or PLT Indoor
LAN systems designed to provide communications over electrical wires. It is concerned with the key functional and
electrical requirements for PLT.
The present document gives the definition of common parameters characterizing the PSD mask, the methods for
initiating them in the context of PLT modems and finally a measurement method in order to verify the compliance of
the PSD of a PLT modem with the present document.
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ITU-R Radio Regulations(2004).
[2] ETSI TS 101 270-2: "Transmission and Multiplexing (TM); Access transmission systems on
metallic access cables; Very High Speed Digital Subscriber Line (VDSL); Part 2: Transceiver
specification".
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
Not applicable.
ETSI

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6 ETSI TS 102 447 V1.1.1 (2008-06)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of th
...