CLC/TR 50083-2-1:2014
(Main)Cable networks for television signals, sound signals and interactive services - Part 2-1: Electromagnetic compatibility measurements
Cable networks for television signals, sound signals and interactive services - Part 2-1: Electromagnetic compatibility measurements
Standards and deliverables of EN 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. This includes for instance - 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.
Kabelnetze für Fernsehsignale, Tonsignale und interaktive Dienste - Teil 2-1: Messungen der elektromagnetischen Verträglichkeit
Kabelska omrežja za televizijske in zvokovne signale ter interaktivne storitve - 2-1. del: Meritve elektromagnetne združljivosti
Standardi in izsledki skupine standardov EN 60728 obravnavajo kabelska omrežja, vključno z opremo in povezanimi metodami za merjenje sprejema glavne sprejemne postaje, obdelavo in distribucijo televizijskih in zvokovnih signalov ter za obdelavo, povezovanje in oddajanje vseh vrst podatkovnih signalov za interaktivne storitve prek vseh primernih prenosnih medijev. Ti signali se v omrežjih običajno prenašajo s tehnikami multipleksiranja frekvenc. To na primer vključuje • regionalna in lokalna širokopasovna kabelska omrežja, • razširjene satelitske in prizemne televizijske distribucijske sisteme, • posamezne satelitske in prizemne televizijske sprejemne sisteme ter vse vrste opreme, sistemov in naprav, uporabljene v tovrstnih kabelskih omrežjih, distribucijskih in sprejemnih sistemih. To standardizacijsko delo med drugim zajema antene in/ali posebne vhode virov signalov v glavno sprejemno postajo ali druge vmesniške točke do omrežja vse do vhodnega terminala opreme v prostorih stranke. To standardizacijsko delo bo upoštevalo soobstoj uporabnikov radiofrekvenčnega spektra v ožičenih in brezžičnih prenosnih sistemih. Standardizacija poljubnih uporabniških terminalov (tj. uglaševalnikov, sprejemnikov, kodirnikov, večpredstavnostnih terminalov itd.) in poljubnih povezanih koaksialnih, simetričnih in optičnih kablov ter opreme je izključena.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2014
Kabelska omrežja za televizijske in zvokovne signale ter interaktivne storitve - 2-1.
del: Meritve elektromagnetne združljivosti
Cable networks for television signals, sound signals and interactive services - Part 2-1:
Electromagnetic compatibility measurements
Kabelnetze für Fernsehsignale, Tonsignale und interaktive Dienste - Teil 2-1: Messungen
der elektromagnetischen Verträglichkeit
Ta slovenski standard je istoveten z: CLC/TR 50083-2-1:2014
ICS:
33.060.40 Kabelski razdelilni sistemi Cabled distribution systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
TECHNICAL REPORT CLC/TR 50083-2-1
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
September 2014
ICS 33.060.40
English Version
Cable networks for television signals, sound signals and
interactive services - Part 2-1: Electromagnetic compatibility
measurements
To be completed Kabelnetze für Fernsehsignale, Tonsignale und interaktive
Dienste - Teil 2-1: Messungen der elektromagnetischen
Verträglichkeit
This Technical Report was approved by CENELEC on 2014-07-28.
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. CLC/TR 50083-2-1:2014 E
Contents page
Foreword . 4
1 Scope . 5
1.1 General . 5
1.2 Specific scope of CLC/TR 50083-2-1 . 5
2 Normative references . 6
3 Term, definitions, symbols and abbreviations . 6
3.1 Terms and definitions . 6
3.2 Symbols . 10
3.3 Abbreviations . 11
4 Considerations on EMC measurements . 11
4.1 General . 11
4.2 General EMC measurement considerations . 12
4.3 Envelope (peak) detection mode . 13
4.4 Quasi-peak detection mode. 13
4.5 Average detection mode . 14
5 EMC measurement apparatus . 14
5.1 Measuring receiver . 14
5.1.1 General . 14
5.1.2 The envelope detector. 15
5.1.3 The peak detector . 15
5.1.4 The quasi-peak detector . 15
5.2 EMC analyser . 16
5.3 Response of the measuring receiver (or EMC analyser) to disturbing signals . 17
5.3.1 Sinusoidal signals . 17
5.3.2 Analogue television signals . 18
5.3.3 Impulse disturbance signals . 18
5.3.4 Random impulse noise signals . 21
5.4 Response of a spectrum analyser to disturbing signals . 23
5.5 Correction factors for bandwidth and detectors . 23
6 Measurement of analogue TV modulated signals . 23
6.1 General considerations . 23
6.2 Correction factors for bandwidth and detectors . 24
7 Measurement of QAM modulated signals . 24
7.1 Peak to average ratio . 24
7.2 Correction factors for bandwidth and detectors . 25
7.3 Correction factors between different detectors . 26
7.4 Fraction of the time the mean power is exceeded . 27
7.5 Linear operation of amplifiers . 27
7.6 Measurements on cable modems . 27
7.7 Measuring equipment setting for QAM signal level measurement . 28
Annex A (informative) Field strength measurement . 29
A.1 General . 29
A.2 Connection of the equipment . 29
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A.3 Measurement procedure . 29
A.3.1 Analogue modulated signals . 29
A.3.2 Digitally modulated signals . 30
A.4 Field strength due to a transmitted power . 31
A.5 Received voltage due to a radiated field . 32
Annex B (informative) LISN (Line Impedance Stabilisation Network) . 34
Bibliography . 35
Foreword
This document (CLC/TR 50083-2-1:2014) has been prepared by CLC/TC 209 "Cable networks for televi-
sion signals, sound signals and interactive services".
Attention is drawn to the possibility that some of the elements of this document may be the subject of pa-
tent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
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1 Scope
1.1 General
Standards and deliverables of EN 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.
This includes for instance
• 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.
1.2 Specific scope of CLC/TR 50083-2-1
This Technical Report describes EMC measurements using specific measuring apparatus or alternative
methods of measurement (e.g. spectrum analyser) and applies to the radiation characteristics of EM-
active equipment (active and passive equipment) for the reception, processing and distribution of
television, sound and interactive multimedia signals as dealt with in the following parts of EN 50083 or EN
60728 series:
− EN 60728-3 "Active wideband equipment for coaxial cable networks";
− EN 60728-4 "Passive wideband equipment for coaxial cable networks";
− EN 60728-5 "Headend equipment";
− EN 60728-6 "Optical equipment";
and covers the following frequency ranges:
− 150 kHz to 30 MHz;
− 30 MHz to 1 GHz.
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 60050-161, International Electrotechnical Vocabulary (IEV) – Chapter 161: Electromagnetic compati-
bility
EN 55016-1-1, Specification for radio disturbance and immunity measuring apparatus and methods – Part
1-1: Radio disturbance and immunity measuring apparatus – Measuring apparatus (CISPR 16-1-1)
ISO/IEC Guide 99:2007, International vocabulary of metrology - Basic and general concepts and associ-
ated terms (VIM)
3 Term, definitions, symbols and abbreviations
3.1 Terms and definitions
For the purpose of this document, the following terms and definitions apply. Also see IEC 60050-161 and
the ISO/IEC Guide 99:2007.
3.1.1
bandwidth
B
n
the width of the overall selectivity curve of the receiver between two points at a stated attenuation below
the midband response. The bandwidth is represented by the symbol B , where n is the stated attenuation
n
in decibels
3.1.2
CATV network
originally defined as Community Antenna Television network; now covering regional and local broadband
cable networks designed to provide sound and television signals as well as signals for interactive services
to a regional or local area
3.1.3
CISPR indicating range
it is the range specified by the manufacturer which gives the maximum and the minimum meter indica-
tions within which the receiver meets the requirements of this section of CISPR 16
3.1.4
electrical charge time constant
T
C
the time needed after the instantaneous application of a constant sine-wave voltage to the stage immedi-
ately preceding the input of the detector for the output voltage of the detector to reach 63 % of its final
value
Note 1 to entry: This time constant is determined as follows: A sine-wave signal of constant amplitude and having a
frequency equal to the mid-band frequency of the IF amplifier is applied to the input of the stage immediately preced-
ing the detector. The indication, D, of an instrument having no inertia (e.g., a cathode-ray oscilloscope) connected to
a terminal in the DC amplifier circuit so as not to affect the behaviour of the detector, is noted. The level of the signal
is chosen such that the response of the stages concerned remains within the linear operating range. A sine wave
signal of this level, applied for a limited time only and having a wave train of rectangular envelope is gated such that
the deflection registered is 0,63 D. The duration of this signal is equal to the charge time of the detector.
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3.1.5
electrical discharge time constant
T
D
the time needed after the instantaneous removal of a constant sine-wave voltage applied to the stage
immediately preceding the input of the detector for the output of the detector to fall to 37 % of its initial
value
Note 1 to entry: The method of measurement is analogous to that for the charge time constant, but instead of a signal
being applied for a limited time, the signal is interrupted for a definite time. The time taken for the deflection to fall to
0,37 D is the discharge time constant of the detector.
3.1.6
electromagnetic-active equipment
all passive and active equipment carrying RF signals are considered as electromagnetic-active equipment
because they are liable to cause electromagnetic disturbances or the performance of them is liable to be
affected by such disturbances
3.1.7
...
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