1、 IEC 60728-1 Edition 5.0 2014-05 INTERNATIONAL STANDARD Cable networks for television signals, sound signals and interactive services Part 1: System performance of forward paths IEC 60728-1:2014-05(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2014 IEC, Geneva, Switzerland All rights reserve
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11、ve services Part 1: System performance of forward paths INTERNATIONAL ELECTROTECHNICAL COMMISSION XG ICS 33.060.40 PRICE CODE ISBN 978-2-8322-1619-4 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distribu
12、tor. 2 IEC 60728-1:2014 IEC 2014 CONTENTS FOREWORD . 10 INTRODUCTION . 12 1 Scope 13 2 Normative references 13 3 Terms, definitions, symbols and abbreviations . 15 3.1 Terms and definitions . 15 3.2 Symbols . 27 3.3 Abbreviations . 29 4 Methods of measurement at system outlet . 31 4.1 Performance li
13、mits . 31 4.2 Mutual isolation between system outlets 33 Overview 33 4.2.1Equipment required 33 4.2.2Connection of the equipment 34 4.2.3Measurement procedure . 34 4.2.4Presentation of the results 35 4.2.5 4.3 Amplitude response within a channel . 35 Overview 35 4.3.1Equipment required 35 4.3.2Conne
14、ction of the equipment 35 4.3.3Measurement procedure . 36 4.3.4Presentation of the results 37 4.3.5 4.4 Chrominance-luminance gain and delay inequalities 38 Overview 38 4.4.1Equipment required 39 4.4.2Connection of the equipment 39 4.4.3Measurement procedure . 39 4.4.4Presentation of the results 40
15、4.4.5 4.5 Non-linear distortion. 41 General 41 4.5.1Intermodulation . 41 4.5.2Composite beat 41 4.5.3Composite crossmodulation 45 4.5.4Intermodulation noise . 46 4.5.5Hum modulation of carriers . 46 4.5.6Differential gain and phase . 51 4.5.7 4.6 Carrier-to-noise ratio 56 Overview 56 4.6.1Equipment
16、required 56 4.6.2Connection of the equipment 56 4.6.3Measurement set-up . 57 4.6.4Measurement procedure . 57 4.6.5Presentation of the results 58 4.6.6 4.7 Echoes 58 Overview 58 4.7.1Equipment required 59 4.7.2IEC 60728-1:2014 IEC 2014 3 Connection of the equipment 59 4.7.3Measurement procedure . 59
17、4.7.4Presentation of the results 60 4.7.5 4.8 AM-VSB television, FM radio and FM television signal level . 60 General 60 4.8.1Definitions for NTSC, PAL and SECAM systems . 60 4.8.2Equipment required 60 4.8.3Measurement procedure . 60 4.8.4Presentation of the results 61 4.8.5 4.9 Data echo rating and
18、 data delay inequality . 61 4.10 Interference in FM sound radio channels 61 4.11 Methods of measurement for digitally modulated signals 61 Overview 61 4.11.1Basic assumptions and measurement interfaces . 62 4.11.2Signal level for digitally modulated signals 65 4.11.3RF signal-to-noise ratio S D,RF /
19、N for digitally modulated 4.11.4 signals 66 Bit error ratio (BER) 68 4.11.5BER versus E b /N 0or C/N . 69 4.11.6Noise margin 73 4.11.7Modulation error ratio (MER) 74 4.11.8Phase jitter . 76 4.11.9Phase noise of an RF carrier 79 4.11.10 5 Performance requirements at system outlet . 82 5.1 General 82
20、5.2 Impedance . 82 5.3 Requirements at the terminal input . 82 General 82 5.3.1Signal level . 83 5.3.2Other parameters . 83 5.3.3 5.4 Carrier levels at system outlets 83 Minimum and maximum carrier levels . 83 5.4.1Carrier level differences 85 5.4.2 5.5 Mutual isolation between system outlets 86 Iso
21、lation between two subscribers 86 5.5.1Isolation between individual outlets in one household . 86 5.5.2Isolation between forward and return path 86 5.5.3 5.6 Frequency response within a television channel at any system outlet . 87 Amplitude response 87 5.6.1Group delay 87 5.6.2 5.7 Long-term frequen
22、cy stability of distributed carrier signals at any system outlet . 88 5.8 Random noise 89 5.9 Interference to television channels . 91 Single-frequency interference . 91 5.9.1Single-channel intermodulation interference . 92 5.9.2Multiple frequency intermodulation interference 92 5.9.3Intermodulation
23、 noise . 92 5.9.4Cross-modulation . 93 5.9.5 4 IEC 60728-1:2014 IEC 2014 5.10 Video baseband requirements 93 Differential gain and phase in any television channel 93 5.10.1Echoes . 93 5.10.2 5.11 Hum modulation of carriers in television channels 93 5.12 Requirements for data signal transmission . 94
24、 Data signals carried in the structure of a television signal . 94 5.12.1Data signals other than those carried within the structure of a 5.12.2 television signal 94 5.13 Digitally modulated signals Additional performance requirements . 94 DVB (PSK, QAM, OFDM) performance . 94 5.13.1NICAM performance
25、 . 96 5.13.2DAB performance . 96 5.13.3 5.14 FM sound radio Additional performance requirements . 97 Amplitude response within an FM channel 97 5.14.1Phase response within an FM channel 97 5.14.2Interference within an FM channel 97 5.14.3AM hum modulation on FM sound carriers 97 5.14.4Echoes within
26、an FM channel . 97 5.14.5 6 Performance requirements at receiving antennas 97 6.1 General 97 6.2 Method of measurement of field strength . 98 Overview 98 6.2.1Equipment required 98 6.2.2Connection of the equipment 98 6.2.3Measurement procedure . 98 6.2.4Presentation of the results 100 6.2.5 6.3 Requ
27、irements 100 General 100 6.3.1Field strength requirements 100 6.3.2Quality of received signals 102 6.3.3Safety . 106 6.3.4Electromagnetic compatibility (EMC) 107 6.3.5 6.4 Interference reduction 107 General 107 6.4.1Active antennas 107 6.4.2 7 Performance requirements at home network interfaces of c
28、able networks 107 7.1 General 107 7.2 Requirements at HNI1 for passive coaxial home networks . 108 General 108 7.2.1Carrier levels at the HNI1 . 109 7.2.2Mutual isolation between two HNI1 . 112 7.2.3Frequency response within any television channel at HNI1 . 112 7.2.4Long-term frequency stability of
29、distributed carrier signals at 7.2.5 HNI1 . 113 Random noise at the HNI1 113 7.2.6Interference to television channels at HNI1 . 113 7.2.7Return path requirements at HNI1 114 7.2.8 7.3 Requirements at HNI2 for active coaxial home networks 114 General 114 7.3.1IEC 60728-1:2014 IEC 2014 5 Carrier level
30、s at the HNI2 . 114 7.3.2Mutual isolation between two HNI2 . 117 7.3.3Frequency response within any television channel at HNI2 . 117 7.3.4Long-term frequency stability of distributed carrier signals at 7.3.5 HNI2 . 117 Random noise at HNI2 118 7.3.6Interference to television channels at the HNI2 . 1
31、21 7.3.7Return path requirements at HNI2 122 7.3.8 7.4 Requirements at HNI3 and at system outlet or terminal input when the home network is mainly of balanced type . 122 Overview 122 7.4.1Requirements at HNI3 122 7.4.2Requirements at system output . 123 7.4.3Additional requirements at HNI3 for upstr
32、eam transmission 123 7.4.4 7.5 Requirements at HNI3 (Case C) . 124 7.6 Requirements at HNI3 (Case D) . 124 Annex A (informative) Reception of television signals 125 Annex B (normative) Calibration of modulation depth . 130 B.1 Equipment required 130 B.2 Connection of the equipment . 130 B.3 Calibrat
33、ion procedure . 130 Annex C (normative) Equipment required Additional items 131 C.1 Measuring receiver preamplifier . 131 C.2 Measuring receiver input filter 131 Annex D (normative) Preliminary checks on the measuring equipment for carrier-to- noise ratio . 132 D.1 Noise . 132 D.2 Intermodulation 13
34、2 D.3 Overload 132 Annex E (normative) Correction factors 133 E.1 Level correction factor C m. 133 E.2 Bandwidth correction factor C b133 Annex F (normative) Calibration of the measuring receiver 134 Annex G (normative) Correction factors for noise . 135 G.1 Signal level measurement 135 G.2 Noise le
35、vel measurement . 135 Annex H (normative) Null packet and PRBS definitions 137 H.1 Null packet definition 137 H.2 PRBS definition 138 Annex I (normative) Digital signal level and bandwidth . 139 I.1 RF/IF power (carrier) . 139 I.2 Bandwidth of a digital signal 139 I.2.1 Occupied bandwidth . 139 I.2.
36、2 Noise bandwidth . 140 I.2.3 Equivalent signal bandwidth . 140 I.3 Examples . 141 Annex J (normative) Correction factor for a spectrum analyser 142 Annex K (informative) Differences in some countries . 143 6 IEC 60728-1:2014 IEC 2014 K.1 Subclause 3.1.58, Norway . 143 K.2 Subclause 5.4.1, Japan, Ne
37、therlands . 143 K.2.1 Japan . 143 K.2.2 Netherlands 143 K.3 Subclause 5.4.2, Japan 143 K.4 Subclause 5.5.1, Japan 144 K.5 Subclause 5.6.1, Japan 145 K.6 Subclause 5.6.2, Netherlands 145 K.7 Subclause 5.7, Japan. 146 K.8 Subclause 5.8, Japan. 146 K.9 Subclause 5.9.1, Japan, Netherlands . 147 K.9.1 Ja
38、pan . 147 K.9.2 Netherlands 148 K.10 Subclause 5.9.5, Japan 149 K.11 Subclause 5.10.2, Netherlands, Japan . 149 K.11.1 Netherlands 149 K.11.2 Japan . 149 K.12 Subclause 5.11, Japan . 150 K.13 Subclause 5.12.1, Denmark . 151 K.14 Subclause 5.13.1.5, Japan . 151 K.15 Subclause 5.14.3, Netherlands 151
39、K.16 Clause 7, Japan . 151 Bibliography 152 Figure 1 Arrangement of test equipment for measurement of mutual isolation between system outlets 34 Figure 2 Arrangement of test equipment for measurement of frequency response within a channel 36 Figure 3 Interpretation of displays for measurement of fre
40、quency response within a channel . 37 Figure 4 Test signal (signal F for 625-line systems) employed for chrominance/luminance gain and delay inequality . 38 Figure 5 Test signal (signal B2 for 625-line systems) employed for chrominance/luminance gain and delay inequality . 38 Figure 6 Arrangement of
41、 test equipment for measurement of chrominance/luminance gain and delay inequality 39 Figure 7 Displayed pulses: chrominance low and lagging . 40 Figure 8 Displayed pulses: chrominance high and leading . 40 Figure 9 Connection of test equipment for the measurement of non-linear distortion by composi
42、te beat . 42 Figure 10 Weighting curve for 625-line system B, G and D1 (PAL): CW interference with no special (frequency offset) control 44 Figure 11 Weighting curve for 625-line system I (PAL): CW interference with no special (frequency offset) control 44 Figure 12 Weighting curve for 625-line syst
43、ems D and K (PAL): CW interference with no special (frequency offset) control 45 Figure 13 Weighting curve for 625-line system L (SECAM): CW interference with no special (frequency offset) control 45 Figure 14 Hum modulation envelope 46 IEC 60728-1:2014 IEC 2014 7 Figure 15 Calibrated potential divi
44、der . 47 Figure 16 Stable variable DC source 47 Figure 17 Connection of equipment for measurement of hum modulation (DC method) 48 Figure 18 Oscilloscope display . 49 Figure 19 Connection of equipment for hum modulation measurement (AC method) 50 Figure 20 Signal D2 . 52 Figure 21 Example of the mod
45、ified staircase waveform 53 Figure 22 Arrangement of test equipment for measurement of differential gain and phase . 54 Figure 23 Arrangement of test equipment for carrier-to-noise ratio measurement . 56 Figure 24 Echo rating graticule 58 Figure 25 Arrangement of test equipment for measurement of ec
46、ho rating . 59 Figure 26 PSK modulation (QPSK, BPSK or TC8PSK) . 62 Figure 27 DVB-S2 modulation (QPSK, 8PSK, 16APSK, 32APSK) 62 Figure 28 DVB-C QAM modulation . 62 Figure 29 DVB-T OFDM modulation . 63 Figure 30 DVB-T2 OFDM modulation . 63 Figure 31 Reference receiver for PSK demodulation (QPSK, BPSK
47、 or TC8PSK) 63 Figure 32 Reference receiver for DVB-S2 demodulation (QPSK, 8PSK, 16APSK, 32APSK) . 64 Figure 33 Reference receiver for QAM demodulation . 64 Figure 34 Reference receiver for DVB-T OFDM demodulation 64 Figure 35 Reference receiver (buffer model) for DVB-T2 OFDM demodulation . 64 Figur
48、e 36 Test set-up for BER measurement 69 Figure 37 Test set-up for BER measurement versus E b /N 0or C/N and noise margin measurement 70 Figure 38 Example of BER measurement versus E b /N 0. 72 Figure 39 Example of BER measurement versus C/N . 72 Figure 40 Test set-up for modulation error ratio (MER)
49、 measurement and phase jitter measurement 75 Figure 41 Example of constellation diagram for a 64 QAM modulation format 76 Figure 42 Example of constellation diagram for a 64 QAM modulation format with arc sections due to phase jitter . 78 Figure 43 Test set-up for phase noise measurement 79 Figure 44 Example of mask for phase noise measurements: PSK, APSK and QAM formats . 81 Figure 45 Example of mask for phase noise measurements: OFDM format 81
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