IEC 60728-1:2007

IEC 60728-1
Edition 4.0 2007-09
INTERNATIONAL
STANDARD
Cable networks for television signals, sound signals and interactive services –
Part 1: System performance of forward paths

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IEC 60728-1
Edition 4.0 2007-09
INTERNATIONAL
STANDARD
Cable networks for television signals, sound signals and interactive services –
Part 1: System performance of forward paths

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XG
ICS 33.060.40 ISBN 2-8318-9264-3

– 2 – 60728-1 © IEC:2007(E)
CONTENTS
FOREWORD.9
INTRODUCTION.11

1 Scope.16
2 Normative references .17
3 Terms, definitions, symbols and abbreviations.19
3.1 Terms and definitions .19
3.2 Symbols .29
3.3 Abbreviations .30
4 Methods of measurement at system outlet.32
4.1 General .32
4.2 Mutual isolation between system outlets.34
4.2.1 Introduction .34
4.2.2 Equipment required .34
4.2.3 Connection of the equipment .34
4.2.4 Measurement procedure .35
4.2.5 Presentation of the results.36
4.3 Amplitude response within a channel.36
4.3.1 Introduction .36
4.3.2 Equipment required .36
4.3.3 Connection of the equipment .36
4.3.4 Measurement procedure .37
4.3.5 Presentation of the results.39
4.4 Chrominance-luminance gain and delay inequalities.39
4.4.1 Introduction .39
4.4.2 Equipment required .40
4.4.3 Connection of the equipment .40
4.4.4 Measurement procedure .40
4.4.5 Presentation of the results.42
4.5 Non-linear distortion .42
4.5.1 General .42
4.5.2 Intermodulation.42
4.5.3 Composite beat .42
4.5.4 Composite crossmodulation.47
4.5.5 Intermodulation noise .47
4.5.6 Hum modulation of carriers.47
4.5.7 Differential gain and phase .52
4.6 Carrier-to-noise ratio .56
4.6.1 Introduction .56
4.6.2 Equipment required .56
4.6.3 Connection of the equipment .56
4.6.4 Measurement set-up.57
4.6.5 Measurement procedure .57
4.6.6 Presentation of the results.58
4.7 Echoes .58
4.7.1 Introduction .58

60728-1 © IEC:2007(E) – 3 –
4.7.2 Equipment required .59
4.7.3 Connection of the equipment .60
4.7.4 Measurement procedure .60
4.7.5 Presentation of the results.60
4.8 AM-VSB television, FM radio and FM television signal level .60
4.8.1 General .60
4.8.2 Definitions for NTSC, PAL and SECAM systems.61
4.8.3 Equipment required .61
4.8.4 Measurement procedure .61
4.8.5 Presentation of the results.62
4.9 Data echo rating and data delay inequality .62
4.10 Interference in FM sound radio channels .62
4.11 Methods of measurement for digitally modulated signals .62
4.11.1 Introduction.62
4.11.2 Basic assumptions and measurement interfaces .62
4.11.3 Signal level for digitally modulated signals .65
4.11.4 RF signal-to-noise ratio S /N for digitally modulated signals.66
D,RF
4.11.5 Bit error ratio (BER) .68
4.11.6 BER versus E /N or C/N.69
b 0
4.11.7 Noise margin.72
4.11.8 Modulation error ratio (MER) .74
4.11.9 Phase jitter.76
4.11.10 Phase noise of an RF carrier.78
5 Performance requirements at system outlet .81
5.1 General .81
5.2 Impedance .82
5.3 Requirements at the terminal input .82
5.3.1 Signal level.82
5.3.2 Other parameters .83
5.4 Carrier levels at system outlets .83
5.4.1 Minimum and maximum carrier levels .83
5.4.2 Carrier level differences .84
5.5 Mutual isolation between system outlets.85
5.5.1 Isolation between two subscribers .85
5.5.2 Isolation between individual outlets in one household .85
5.5.3 Isolation between forward and return path .85
5.6 Frequency response within a television channel at any system outlet .86
5.6.1 Amplitude response.86
5.6.2 Group delay.86
5.7 Long-term frequency stability of distributed carrier signals at any system
outlet.87
5.8 Random noise .88
5.9 Interference to television channels .89
5.9.1 Single-frequency interference .89
5.9.2 Single-channel intermodulation interference .90
5.9.3 Multiple frequency intermodulation interference.90
5.9.4 Intermodulation noise .90
5.9.5 Cross-modulation .91
5.10 Video baseband requirements .91

– 4 – 60728-1 © IEC:2007(E)
5.10.1 Differential gain and phase in any television channel.91
5.10.2 Echoes .91
5.10.3 Amplitude and phase response for PALplus signals.91
5.11 Hum modulation of carriers in television channels .91
5.12 Requirements for data signal transmission .92
5.12.1 Data signals carried in the structure of a television signal.92
5.12.2 Data signals other than those carried within the structure of a
television signal.92
5.13 Digitally modulated signals – Additional performance requirements .93
5.13.1 DVB (PSK, QAM, OFDM) performance .93
5.13.2 NICAM performance .94
5.13.3 DAB performance .94
5.14 FM sound radio – Additional performance requirements .95
5.14.1 Amplitude response within an FM channel .
...