IEC 60728-1:2001

INTERNATIONAL IEC
STANDARD
60728-1
Third edition
2001-11
Cabled distribution systems
for television and sound signals –
Part 1:
Methods of measurement
and system performance
Reference number
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INTERNATIONAL IEC
STANDARD
60728-1
Third edition
2001-11
Cabled distribution systems
for television and sound signals –
Part 1:
Methods of measurement
and system performance
 IEC 2001  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
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International Electrotechnical Commission
For price, see current catalogue

– 2 – 60728-1  IEC:2001
CONTENTS
FOREWORD.3

INTRODUCTION.9

1 Scope.10

2 Normative references .10

3 Terms, definitions, symbols and abbreviations.11

3.1 Terms and definitions .11

3.2 Symbols .17

3.3 Abbreviations .18
4 Methods of measurement .21
4.1 Mutual isolation between system outlets.22
4.2 Amplitude response within a channel.23
4.3 Chrominance-luminance gain and delay inequalities.24
4.4 Non-linear distortion .26
4.5 Carrier to noise ratio.35
4.6 Echoes .37
4.7 AM-VSB television, FM radio and FM television signal level .38
4.8 Data echo rating and data delay inequality .39
4.9 Interference in FM sound radio channels .39
4.10 Methods of measurement for digitally modulated signals .39
5 Performance requirements .53
5.1 Impedance .54
5.2 Carrier levels at system outlets .54
5.3 Mutual isolation between system outlets.56
5.4 Frequency response within a television channel at any system outlet .56
5.5 Long-term frequency stability of distributed carrier signals at any system
outlet.57
5.6 Random noise .57
5.7 Interference to television channels .58
5.8 Video baseband requirements .59
5.9 Hum modulation of carriers in television channels .60
5.10 Requirements for data signal transmission .60
5.11 Digitally modulated signals – Additional performance requirements .61
5.12 FM sound radio – Additional performance requirements .62

Annex A (normative) Calibration of modulation depth.87
Annex B (normative) Equipment required – additional items .88
Annex C (normative) Preliminary checks on the measuring equipment for carrier to
noise ratio .89
Annex D (normative) Correction factors .90
Annex E (normative) Calibration of the measuring receiver .91
Annex F (normative) Correction factors for noise .92
Annex G (normative) Null packet and PRBS definitions.94
Annex H (normative) Digital signal level and bandwidth .96
Annex I (normative) Correction factor for a spectrum analyzer .99
Bibliography.100

60728-1  IEC:2001 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION

–––––––––––
CABLED DISTRIBUTION SYSTEMS
FOR TELEVISION AND SOUND SIGNALS –

Part 1: Methods of measurement and system performance

FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60728-1 has been prepared by TA 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 1986, its amendment 1
(1992) and amendment 2 (1995) of which it constitutes a technical revision.
The text of this standard is based on

FDIS Report on voting
100/404/FDIS 100/436/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 3.
Annexes A, B, C, D, E, F, G, H and I form an integral part of this standard.
The committee has decided that the contents of this publication will remain unchanged until
2005. At this date, the publication will be
• reconfirmed;
• withdrawn;
– 4 – 60728-1  IEC:2001
• replaced by a revised edition, or

• amended.
The following differences exist in some countries:

– 5.2.1: Replace by the following “Minimum and maximum carrier levels” regulation (France):

AM-VSB television:
between 47 MHz and 68 MHz: 57,5 dB(μV)
min
74,0 dB(μV)
max
between 118,75 MHz and 862 MHz:
57,0 dB(μV)
min
74,0 dB(μV)
max
FM sound mono or stereo:
50 dB(μV)
min
66 dB(μV)
max
Replace by/add the following “Minimum and maximum carrier levels” regulation (Japan):
AM-VSB television
60 dB(μV)min
85 dB(μV)
max
FM sound mono or stereo
50 dB(μV)
min
75 dB(μV)
max
FM NTSC television 57 dB(μV)
min
FM HDTV (1 035 MHz~1 335 MHz)
57 dB(μV)
min
AM HDTV 65 dB(μV)
min
85 dB(μV)
max
64QAM digital TV
53 dB(μV)
min
85 dB(μV)
max
Upper CH adjacent to AM-VSB television
53 dB(μV)
min
81 dB(μV)
max
Lower CH adjacent to AM-VSB television
53 dB(μV)
min
79 dB(μV)
max
Replace by/add the following “Minimum and maximum carrier levels” regulation (Netherlands):
FM sound mono: 80 dB(μV)
max
DSR:
39 dB(μV)
max
(measured in accordance with CISPR 16-1 (quasi peak measurement within 120 kHz
bandwidth))
Replace by the following “Minimum and maximum carrier levels” regulation (Norway):
AM-VSB television:
60,0 dB(μV)
min
84,0 dB(μV)
max
FM sound mono or stereo: 52 dB(μV)
min
80,0 dB(μV)
max
60728-1  IEC:2001 – 5 –
- 5.2.2: Replace by/add the following “Carrier level differences” regulation (France):

Between 47 MHz and 862 MHz
TV channels in AM-VSB:              ≤12 dB

TV channels in FM:                  ≤12 dB Between 950 MHz and 2 050 MHz

Between adjacent channels spaced
≤4 dB
less than 40 MHz
– 5.2.2: Replace by/add the following “Carrier level differences” regulation (Japan):

AM-VSB television Not more than 10 dB
(not more than 3 dB between adjacent CH)
Sound carrier to vision carrier
−3 to −14 dB
(−9 dB to −14 dB between adjacent CH)
FM Not more than 10 dB
FM carrier to AM-VSB Not more than –10 dB
FM NTSC Not more than 6 dB
FM HDTV Not more than 6 dB
AM HDTV Not more than 3 dB between adjacent CH
64 QAM carrier to AM-VSB
Upper CH adjacent to AM-VSB –4 dB to –18 dB
Lower CH adjacent to AM-VSB –6 dB to –20 dB
Replace by/add the following “Carrier level differences” regulation (Norway):
AM-VSB television:
≤2 dB within a TV channel
within band I, II, III
≤6 dB
within band IV
≤10 dB
≤12 dB within band V
– 5.3.1: Replace by/add the following “Isolation between two subscribers” regulation (France):
TV/TV: ≥30 dB Between 10 MHz and 2 050 MHz

Between the TV outlet of any subscriber and the
TV/FM sound: ≥50 dB
FM sound outlet of an other subscriber
Replace by /add the following “Isolation between two subscribers” regulation (Japan):
TV/TV  (mutual isolation of a subscriber tap) Not less than 25 dB
TV/FM  (in case of FM filter use) Not less than 35 dB
Replace by/add the following “Isolation between two subscribers” regulation (Norway):
Between 47 MHz – 470 MHz
TV/TV                            ≥36 dB
Between 470 MHz – 790 MHz
≥30 dB
FM sound/TV                       ≥46 dB
...