EN 60728-5:2008

SLOVENSKI STANDARD
01-julij-2008
1DGRPHãþD
SIST EN 50083-5:2003
Kabelska omrežja za televizijske in zvokovne signale ter interaktivne storitve - 5.
del: Oprema glavne sprejemne postaje (IEC 60728-5:2007)
Cable networks for television signals, sound signals and interactive services - Part 5:
Headend equipment (IEC 60728-5:2007)
Kabelnetze für Fernsehsignale, Tonsignale und interaktive Dienste - Teil 5: Geräte für
Kopfstellen (IEC 60728-5:2007)
Réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion
sonore et services interactifs - Partie 5: Equipements de tête de réseau (CEI 60728-
5:2007)
Ta slovenski standard je istoveten z: EN 60728-5:2008
ICS:
33.060.40 Kabelski razdelilni sistemi Cabled distribution systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60728-5
NORME EUROPÉENNE
May 2008
EUROPÄISCHE NORM
ICS 33.060.40 Supersedes EN 50083-5:2001

English version
Cable networks for television signals,
sound signals and interactive services -
Part 5: Headend equipment
(IEC 60728-5:2007)
Réseaux de distribution par câbles  Kabelnetze für Fernsehsignale,
pour signaux de télévision, Tonsignale und interaktive Dienste -
signaux de radiodiffusion sonore Teil 5: Geräte für Kopfstellen
et services interactifs - (IEC 60728-5:2007)
Partie 5: Equipements de tête de réseau
(CEI 60728-5:2007)
This European Standard was approved by CENELEC on 2008-04-01. 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 Central Secretariat or to any CENELEC member.

This European Standard exists in two official versions (English and 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
Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60728-5:2008 E
Foreword
The text of document 100/1244/FDIS, future edition 2 of IEC 60728-5, 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
was approved by CENELEC as EN 60728-5 on 2008-04-01.
This European Standard supersedes EN 50083-5:2001.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2009-01-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2011-04-01
with the EN have to be withdrawn
For this European Standard the informative Annex D of IEC 60728-5:2007 shall be disregarded and
has been replaced by the normative Annex ZB, Special national conditions.
Annexes ZA and ZB have been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60728-5:2007 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 60169-8 NOTE  IEC 60169-8:1986 is superseded by IEC 61169-8:2007, which is harmonized as
EN 61169-8:2007 (not modified).
IEC 61169-2 NOTE  IEC 61169-2:2001 is superseded by IEC 61169-2:2007, which is harmonized as
EN 61169-2:2007 (not modified).
__________
- 3 - EN 60728-5:2008
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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.

NOTE 1 When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Where a standard cited below belongs to the EN 50000 series, the European Standard applies instead of the relevant
International Standard.
Publication Year Title EN/HD Year

1)
- Digital Video Broadcasting (DVB): Framing ETSI EN 300 421 -
structure, channel coding and modulation
for 11/12 GHz satellite services

1)
- Digital Video Broadcasting (DVB): Framing ETSI EN 300 429 -
structure, channel coding and modulation for
cable systems
1)
- Digital Video Broadcasting (DVB): ETSI EN 300 468 -
Specification for Service Information (SI) in
DVB systems
1)
- Digital Video Broadcasting (DVB): Satellite ETSI EN 300 473 -
Master Antenna Television (SMATV)
distribution systems
1)
- Digital Video Broadcasting (DVB): Framing ETSI EN 300 744 -
structure, channel coding and modulation for
digital terrestrial television

1)
- Digital Video Broadcasting (DVB): Second ETSI EN 302 307 -
generation framing structure, channel coding
and modulation systems for Broadcasting,
Interactive Services, News Gathering and
other broadband satellite applications

1)
- Television systems; NICAM 728: ETSI ETS 300 163 -
transmission of two-channel digital sound
with terrestrial television systems B, G, H,
I, K1 and L
- Digital Video Broadcasting (DVB): ETSI TR 101 211 -
Guidelines on implementation and usage of
Service Information (SI)
IEC 60068 Series Environmental testing EN 60068 Series

1) 2)
IEC 60130-9 - Connectors for frequencies below 3 MHz - EN 60130-9 2000
Part 9: Circular connectors for radio and
associated sound equipment
1) 2)
IEC 60244-5 - Methods of measurement for radio EN 60244-5 1994
transmitters -
Part 5: Performance characteristics for
television transmitters
1)
Undated reference.
2)
Valid edition at date of issue.

Publication Year Title EN/HD Year

IEC 60417 Data- Graphical symbols for use on equipment - -
base
1) 2)
IEC 60529 - Degrees of protection provided by EN 60529 1991
enclosures (IP Code) + corr. May 1993

IEC 60617 Data- Graphical symbols for diagrams - -
base
1) 2)
IEC 60728-1 - Cable networks for television signals, EN 60728-1 2008
ound signals and interactive services -
Part 1: System performance of forward paths

1) 2)
IEC 60728-2 - Cabled distribution systems for television EN 50083-2 2006
and sound signals -
Part 2: Electromagnetic compatibility for
equipment
1) 2)
IEC 60728-3 - Cable networks for television signals, EN 60728-3 2006
sound signals and interactive services -
Part 3: Active wideband equipment for
coaxial cable networks
1) 2)
IEC 60728-11 (mod)- Cable networks for television signals, EN 60728-11 2005
sound signals and interactive services -
Part 11: Safety
1) 2)
IEC 61319-1 - Interconnections of satellite receiving EN 61319-1 1996
equipment - + A11 1999
Part 1: Europe
1) 2)
EN ISO/IEC 13818-1
ISO/IEC 13818-1 - Information technology - Generic coding of 1997
moving pictures and associated audio
information: Systems
1)
ISO/IEC 13818-2 - Information technology - Generic coding of - -
moving pictures and associated audio
information -
Part 2: Video
1) 2)
EN ISO/IEC 13818-3
ISO/IEC 13818-3 - Information technology - Generic coding of 1996
moving pictures and associated audio
information -
Part 3: Audio
1)
ISO/IEC 13818-4 - Information technology - Generic coding of - -
moving pictures and associated audio
information -
Part 4: Conformance testing
1)
ITU-R - Measurement of audio-frequency noise - -
Recommendation voltage level in sound broadcasting
BS.468-4
1)
ITU-R Report - Characteristics of television systems - -
BT 624-4
1)
ITU-T - Transmission performance of television - -
Recommendation circuits designed for use in international
J.61 connections
1)
ITU-T - Measurement methods and test procedures - -
Recommendation for teletext signals
J.101
- 5 - EN 60728-5:2008
Annex ZB
(normative)
Special national conditions
Special national condition: National characteristic or practice that cannot be changed even over a
long period, e.g. climatic conditions, electrical earthing conditions.
NOTE  If it affects harmonization, it forms part of the European Standard / Harmonization Document.
For the countries in which the relevant special national conditions apply these provisions are
normative, for other countries they are informative.
Clause Special national condition
5.3 Finland, Sweden
All equipment installed in locations that are not temperature controlled shall meet
the requirements within the temperature range -40 °C to +55 °C.
__________
IEC 60728-5
Edition 2.0 2007-08
INTERNATIONAL
STANDARD
Cable networks for television signals, sound signals and interactive services –
Part 5: Headend equipment
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XC
ICS 33.060.40 ISBN 2-8318-9263-5

– 2 – 60728-5 © IEC:2007(E)
CONTENTS
FOREWORD.8
INTRODUCTION.10

1 Scope.11
2 Normative references .13
3 Terms, definitions, symbols and abbreviations.14
3.1 Terms and definitions .14
3.2 Symbols .19
3.3 Abbreviations .19
4 Methods of measurement .21
4.1 Methods of measurement for digitally modulated signals .21
4.1.1 Introduction .21
4.1.2 Basic assumptions and measurement interfaces.21
4.1.3 Signal level for digitally modulated signals.21
4.2 Single-channel intermodulation specification for channel amplifier and
frequency converter.23
4.3 Three-carrier intermodulation measurement .24
4.4 Two carrier intermodulation measurements for second- and third-order
products .25
4.4.1 Introduction .25
4.4.2 Intermodulation products with test signals at frequencies f and f .26
a b
4.4.3 Signal levels .26
4.5 Carrier-to-spurious signal ratio at the output.26
4.5.1 Carrier-to-spurious signal ratio at the output of equipment for AM-TV
systems.26
4.5.2 Carrier-to-spurious signal ratio at the output of equipment for FM-TV
systems.27
4.5.3 Shoulder attenuation .28
4.6 Signal-to-noise measurement .29
4.6.1 Television carrier-to-noise ratio (analogue modulated signals).29
4.6.2 RF signal-to-noise ratio (S /N) for digitally modulated signals .32
D,RF
4.7 Differential gain and phase for PAL/SECAM signals .34
4.7.1 Introduction .34
4.7.2 Differential gain (for PAL/SECAM only).34
4.7.3 Differential phase .35
4.8 Group delay measurements.38
4.8.1 Group delay variation of analogue TV signals .38
4.8.2 Procedure for the measurement of group delay variation on DVB
channel converters .39
4.9 Phase noise of an RF carrier .42
4.9.1 Introduction .42
4.9.2 Equipment required .42
4.9.3 Connection of the equipment .42
4.9.4 Measurement procedure .43
4.9.5 Presentation of the results.43
4.10 Hum modulation of carrier .44
4.10.1 Definition.44

60728-5 © IEC:2007(E) – 3 –
4.10.2 Description of the method of measurement.45
4.10.3 Measuring Procedure .46
4.10.4 Calculating the hum modulation ratio.47
4.11 2T-pulse response, K-factor .48
4.12 Chrominance-luminance delay inequalities (20T-pulse method).49
4.13 Luminance non-linearity .50
4.14 Intermodulation distortion (FM stereo radio) .51
4.14.1 Introduction .51
4.14.2 Equipment required .52
4.14.3 Connection of equipment .52
4.14.4 Measurement.52
4.15 Decoding margin (Teletext) .53
4.15.1 Definition.53
4.15.2 Method of measurement and measuring set-up (Figure 29) .53
4.15.3 Applicability of measuring set-up .53
5 Performance requirements and recommendations .54
5.1 Safety .54
5.2 Electromagnetic compatibility .54
5.3 Environmental .54
5.4 Marking .55
5.4.1 Marking of equipment .55
5.4.2 Marking of ports .55
6 Equipment characteristics required to be met .55
6.1 General .55
6.2 Power supply voltage .56
6.3 RF signal requirements .56
6.3.1 Impedance (input).56
6.3.2 Impedance (output) .56
6.3.3 Return loss (input, output) of equipment .56
6.3.4 Return loss (output) of headend .56
6.3.5 Typical back off for digital against analogue signals .57
6.3.6 Immunity against other signals in the FM radio and TV range .57
6.3.7 Carrier-to-spurious-signals ratio at output in the frequency range of
40 MHz to 862 MHz .57
6.3.8 Image rejection for AM TV and FM radio.57
6.3.9 Carrier to local oscillator signal ratio at the output for AM TV and FM
radio.58
6.3.10 Frequency stability .58
6.3.11 Phase noise of digital modulated signals at the output of the headend .59
6.3.12 In-channel group delay variation for digital modulated signals .60
6.3.13 In-channel peak-to-peak amplitude response variation for digitally
modulated signals.60
6.3.14 Stability of sound intercarrier .60
6.3.15 Stability of residual carrier amplitude.61
6.3.16 Frequency stability – SAT IF/IF converter .61
6.3.17 Typical modulation error ratio (MER) for a QAM signal .61
6.3.18 Minimum C/N values at the output of the headend .61
6.4 Composite video signal requirements .62
6.4.1 Impedance.62

– 4 – 60728-5 © IEC:2007(E)
6.4.2 Return loss .62
6.4.3 Signal voltage.62
6.4.4 Polarity.62
6.4.5 Offset voltage .62
6.5 Audio signal requirements .62
6.5.1 Input impedance .62
6.5.2 Output impedance .62
6.5.3 Signal level.63
6.6 Requirements for decoding margin (teletext) .63
6.7 IF signal requirements (AM-TV).63
6.7.1 Impedance.63
6.7.2 Return loss .63
6.8 Antennas for terrestrial reception .63
6.8.1 Impedance.63
6.8.2 Return loss .63
6.9 Antenna amplifier .63
7 Equipment characteristics required to be published .64
7.1 General .64
7.2 Environmental conditions .64
7.3 Maximum permissible output level .64
7.4 Operating range for output level .65
7.5 TV standard .65
7.6 Clamp .65
7.7 Noise figure.65
7.7.1 Equipment without AGC.65
7.7.2 Equipment with AGC .66
7.8 Data control signals, description of interface .66
7.9 Output level stability for TV modulators, TV converters and pilot generators.66
7.10 Pilot signal .66
7.11 Differential gain and phase.67
7.11.1 Differential gain .67
7.11.2 Differential phase .67
7.12 Group delay variation for analogue TV signals.67
7.13 Luminance non-linearity .68
7.14 2T-pulse.68
7.15 20T-pulse .68
7.16 Hum modulation .68
7.17 Television carrier-to-noise ratio .68
7.18 Audio in TV .68
7.19 Processing units for FM radio .69
7.19.1 Audio input .69
7.19.2 Stereo crosstalk .69
7.19.3 Total harmonic distortion .69
7.19.4 Intermodulation distortion .69
7.19.5 Deviation, pre-emphasis .69
7.20 Antennas for terrestrial reception .69
7.20.1 Antenna gain .69
7.20.2 Sidelobe suppression .69
7.20.3 Return loss of antennas.69

60728-5 © IEC:2007(E) – 5 –
7.21 Control signals for outdoor units.70

Annex A (normative) Definition of the specified test frequency range for return loss
and noise figure .71
Annex B (informative) Audio connector for European system .73
Annex C (informative) Selectivity diagram for adjacent channel transmission.74
Annex D (informative) Differences in some countries .79
Annex E (normative) Correction factors for noise .80
Annex F (informative)  Digital signal level and bandwidth.82
Annex G (informative) Minimum frequency distance of converted satellite signals in
the IF range .85
Annex H (informative) Measurement errors which occur due to mismatched equipment .86
Annex I (normative) Correction factor for spectrum analyser .87

Bibliography.88

Figure 1 – Example of headend .12
Figure 2 – Frequencies and levels of test carriers .24
Figure 3 – Test carrier and interfering products in the pass band .25
Figure 4 – Example showing products formed when 2 f > f .26
a b
Figure 5 – Carrier-to-spurious signal ratio in the output.27
Figure 6 – Carrier-to spurious signal ratio at the output.28
Figure 7 – Shoulder attenuation .28
Figure 8 – Arrangement of test equipment for carrier-to-noise ratio measurement.29
Figure 9 – Arrangement of test equipment for measurement of differential gain and
phase .37
Figure 10 – Signal D2 waveform .37
Figure 11 – Example of modified staircase.37
Figure 12 – Measuring set-up for determining the group delay variation.38
Figure 13 –RF signal (time domain) amplitude-modulated with a split-frequency signal.39
Figure 14 – Spectral presentation of the group delay measurement .40
Figure 15 – Description of the measuring set-up .41
Figure 16 – Choices of measuring aperture (value of the split frequency) for various
measurement tests .41
Figure 17 – Test set-up for phase noise measurement.43
Figure 18 – Mask for phase noise measurements .44
Figure 19 – Carrier/hum ratio .45
Figure 20 – Test set-up for equipment with built-in power supply .46
Figure 21 – Test set-up for equipment with external power supply .46
Figure 22 – Oscilloscope display.47
Figure 23 – K-factor mask for Quality Grade 2 .48
Figure 24 – Generation of 20T-pulse.49
Figure 25 – Example of amplitude and delay error using 20T-pulse.50
Figure 26 – Staircase signal for measurement of luminance non-linearity before and
after differentiation.51

– 6 – 60728-5 © IEC:2007(E)
Figure 27 – Example of a possible frequency combination displayed on a spectrum
analyser.51
Figure 28 – Arrangement of test equipment for intermodulation distortion .52
Figure 29 – Principal measuring set-up for determination of decoding margin .53
Figure 30 – Example of diagram of NF, C/N or S/N for equipment with AGC .66
Figure A.1 – Test frequency range for TV channel processors .71
Figure A.2 – Test frequency range for sub-band, full-band, multi-band amplifier .71
Figure A.3 – Test frequency range for FM radio channel processor.72
Figure B.1 – Mechanical dimensions.73
Figure C.1 – Selectivity diagram .74
Figure C.2 – Selectivity diagram .75
Figure C.3 – Selectivity diagram .76
Figure C.4 – Group delay mask.76
Figure C.5 – Group delay pre-correction diagram.77
Figure C.6 – Selectivity diagram .77
Figure C.7 – Group delay mask.78
Figure C.8 – Selectivity diagram .78
Figure E.1 – Noise correction factor CF (dB) versus measured level difference D (dB) .81
Figure G.1 – Frequency tolerance of converted signals in the IF range .85
Figure H.1 – Error concerning return loss measurement .86
Figure H.2 – Maximum ripple .86

Table 1 – Test signal levels in decibels relative to reference level .23
Table 2 – Test signal levels in decibels relative to reference level .24
Table 3 – Test signal levels in decibels relative to reference level .27
Table 4 – Noise bandwidth.31
Table 5 – Frequency distances for phase noise measurement .43
Table 6 – Publications for environmental requirements of headend equipment.55
Table 7 – Return loss (input, output) of equipment.56
Table 8 – Return loss (output) of headend .56
Table 9 – Typical levels of digital signals with respect to analogue signals (back off).57
Table 10 – Carrier-to-spurious-signals ratio of digital modulated channel with respect
to the peak level of an analogue TV carrier .57
Table 11 – Frequency stability for AM TV related to the nominal AM TV frequency .58
Table 12 – Long-term frequency stability for digital modulated signals .58
Table 13 – Shoulder attenuation for digital modulated signals.59
Table 14 – Phase noise of a DVB signal (PSK and QAM).59
Table 15 – Phase noise of a DVB signal (OFDM) .59
Table 16 – In-channel group delay variation for digital modulated signals .60
Table 17 – In-channel peak-to-peak amplitude response variation of DVB signals .60
Table 18 – Stability of sound intercarrier.60
Table 19 – Stability of residual carrier amplitude.61
Table 20 – Frequency stability – SAT IF/IF converter.61
Table 21 – Minimum requirements for MER for different QAM modulation schemes .61

60728-5 © IEC:2007(E) – 7 –
Table 22 – C/N values for converters at the headend output .61
Table 23 – Return loss.62
Table 24 – Signal voltage .62
Table 25 – Signal level .63
Table 26 – Requirements for decoding margin (Teletext) .63
Table 27 – Return loss – IF signal.63
Table 28 – Return loss – Antennas for terrestrial reception .63
Table 29 – Recommended temperature ranges .64
Table 30 – Carrier-to-third-order intermodulation ratio for maximum output level of
channel amplifiers/frequency converters .64
Table 31 – Carrier-to-third-order intermodulation ratio for maximum output level of
sub-band, full band, multi-band amplifiers and multi-channel frequency converters for
AM TV (not for channel amplifier).64
Table 32 – Carrier-to-second-order intermodulation ratio for maximum output level of
sub-band, full band, multi-band amplifiers and frequency converters for AM TV or FM
radio (not for channel amplifier) .65
Table 33 – Carrier-to-intermodulation ratio for maximum output level of FM-TV
channel amplifiers/frequency converters .65
Table 34 – Carrier-to-third-order intermodulation ratio for maximum output level of FM
TV full band, sub-band amplifiers.65
Table 35 – Output level stability for TV modulators and TV converters.66
Table 36 – Recommendation for differential gain .67
Table 37 – Recommendation for differential phase.67
Table 38 – Recommendation for group delay variation.67
Table 39 – Recommendation for luminance non-linearity .68
Table 40 – K-factor masks for 2T-pulse responses.68
Table 41 – Recommendations for sidelobe suppression.69
Table 42 – Recommendation for return loss of antennas.69
Table B.1 – Mechanical dimensions .73
Table B.2 – Pin and signal allocation .73
Table B.3 – Application.73
Table C.1 – Selectivity table .75
Table C.2 – Group delay pre-correction table.77
Table E.1 – Noise correction factor .80
Table F.1 – Examples of bandwidths for digital modulation techniques .84

– 8 – 60728-5 © IEC:2007(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
______________
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –

Part 5: Headend equipment
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 60728-5 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 second edition cancels and replaces the first edition published in 2001, of which it
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
• Revised title and scope
• Clause 3, several new terms and definitions
• Subclause 4.1, Methods of measurement for digitally modulated signals
• Subclause 4.6.2, RF signal-to-noise ratio (S /N) for digitally modulated signals
D,RF
60728-5 © IEC:2007(E) – 9 –
• Subclause 4.8.2, Procedure for the measurement of group delay variation on DVB channel
converte
...