BS EN 60728-101:2017:2018 Edition
$215.11
Cable networks for television signals, sound signals and interactive services – System performance of forward paths loaded with digital channels only
| Published By | Publication Date | Number of Pages |
| BSI | 2018 | 116 |
This part of IEC 60728 is applicable to any cable network (including individual receiving systems) distributing only digital channels having in the forward path a coaxial cable output and primarily intended for television and sound signals operating between about 30 MHz and 3 000 MHz.
This standard specifies the basic methods of measurement of the operational characteristics of a cable network having coaxial cable outputs in order to assess the performance of these systems and their performance limits.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 8 | CONTENTS |
| 14 | FOREWORD |
| 16 | INTRODUCTION |
| 17 | Figures FigureĀ 1 ā Example of a master antenna television system (MATV) for terrestrial reception |
| 18 | FigureĀ 2 ā Example of the headend of a master antenna television system for satellite (SMATV) reception FigureĀ 3 ā Example of a master antenna television system for terrestrial and satellite (SMATV) reception |
| 19 | FigureĀ 4 ā Example of a cabled distribution system for television and sound signals |
| 20 | FigureĀ 5 ā System model for downstream direction of a cable network for television and sound signals (CATV) |
| 21 | 1 Scope 2 Normative references |
| 23 | 3 Terms, definitions, symbols and abbreviations 3.1 Terms and definitions |
| 35 | 3.2 Symbols |
| 37 | 3.3 Abbreviations |
| 39 | 4 Methods of measurement at system outlet 4.1 General Tables TableĀ 1 ā Application of the methods of measurement |
| 40 | 4.2 Basic assumptions and measurement interfaces FigureĀ 6 ā PSK modulation (QPSK, BPSK or TC8PSK) FigureĀ 7 ā DVB-S2 modulation (QPSK, 8PSK, 16APSK, 32APSK) FigureĀ 8 ā DVB-C QAM modulation |
| 41 | FigureĀ 9 ā DVB-C2 QAM modulation FigureĀ 10 ā DVB-T OFDM modulation FigureĀ 11 ā DVB-T2 OFDM modulation |
| 42 | FigureĀ 12 ā Reference receiver for PSK demodulation (QPSK, BPSK or TC8PSK) FigureĀ 13 ā Reference receiver for DVB-S2 demodulation(QPSK, 8PSK, 16APSK, 32APSK) FigureĀ 14 ā Reference receiver for DVB-C QAM demodulation FigureĀ 15 ā Reference receiver for DVB-C2 demodulation |
| 43 | 4.3 Signal level 4.3.1 General FigureĀ 16 ā Reference receiver for DVB-T OFDM demodulation FigureĀ 17 ā Reference receiver (buffer model) for DVB-T2 OFDM demodulation |
| 44 | 4.3.2 Equipment required 4.3.3 Connection of the equipment 4.3.4 Measurement procedure |
| 45 | 4.3.5 Presentation of the results 4.4 RF signal-to-intermodulation and noise ratio S/IN 4.4.1 General 4.4.2 Equipment required |
| 46 | 4.4.3 Connection of the equipment 4.4.4 Measurement procedure 4.4.5 Presentation of the results 4.5 Bit error ratio (BER) 4.5.1 General |
| 47 | 4.5.2 Equipment required 4.5.3 Connection of the equipment 4.5.4 Measurement procedure FigureĀ 18 ā Test set-up for BER measurement |
| 48 | 4.5.5 Presentation of the results 4.6 BER versus S/N 4.6.1 General 4.6.2 Equipment required |
| 49 | 4.6.3 Connection of the equipment 4.6.4 Measurement procedure FigureĀ 19 ā Test set-up for BER measurement versus S/N |
| 50 | 4.6.5 Presentation of the results |
| 51 | 4.7 System operating levels and margins 4.7.1 General FigureĀ 20 ā Example of BER measurement versus S/N |
| 52 | FigureĀ 21 ā Example of S/IN and BER versus signal level Sfor a cable network without optical link FigureĀ 22 ā Optical and coaxial subsystems of an HFC network |
| 53 | 4.7.2 White noise signal margin (SMWN) |
| 54 | 4.7.3 Intermodulation noise signal margin (SMIN) FigureĀ 23 ā Test set-up for SMWN and SMIN measurement |
| 56 | 4.8 Modulation error ratio (MER) 4.8.1 General 4.8.2 Equipment required 4.8.3 Connection of the equipment |
| 57 | 4.8.4 Measurement procedure FigureĀ 24 ā Test set-up for modulation error ratio (MER) measurement and phase jitter measurement |
| 58 | 4.8.5 Presentation of the results 4.9 Phase jitter 4.9.1 General 4.9.2 Equipment required FigureĀ 25 ā Example of constellation diagram for a 64 QAM modulation format |
| 59 | 4.9.3 Connection of the equipment 4.9.4 Measurement procedures |
| 60 | FigureĀ 26 ā Example of constellation diagram for a 64 QAM modulation format with arcs due to phase jitter |
| 61 | 4.9.5 Presentation of the results 4.10 Phase noise of an RF carrier 4.10.1 General 4.10.2 Equipment required |
| 62 | 4.10.3 Connection of the equipment 4.10.4 Measurement procedure FigureĀ 27 ā Test set-up for phase noise measurement |
| 63 | 4.10.5 Presentation of the results FigureĀ 28 ā Example of mask for phase noise measurements: PSK, APSK and QAM formats FigureĀ 29 ā Example of mask for phase noise measurements: OFDM format TableĀ 2 ā Frequency distance fm |
| 64 | 4.11 Mutual isolation between system outlets 4.11.1 General 4.11.2 Equipment required 4.11.3 Connection of the equipment 4.11.4 Measurement procedure FigureĀ 30 ā Arrangement of test equipment for measurement of mutual isolation between system outlets |
| 65 | 4.11.5 Presentation of the results 4.12 Amplitude response within a channel 4.12.1 General 4.12.2 Equipment required |
| 66 | 4.12.3 Connection of the equipment 4.12.4 Measurement procedure FigureĀ 31 ā Arrangement of test equipment for measurement of frequency response within a channel |
| 67 | FigureĀ 32 ā Interpretation of displays for measurement of frequency response within a channel |
| 68 | 4.12.5 Presentation of the results 4.13 Non-linear distortion 4.13.1 General 4.13.2 Intermodulation 4.13.3 Composite crossmodulation 5 Performance requirements at system outlet 5.1 General requirements 5.2 Overview 5.3 Impedance |
| 69 | 5.4 Requirements at the terminal input 5.4.1 General 5.4.2 Signal level 5.4.3 Other parameters 5.5 RF signal levels at system outlets 5.5.1 Minimum and maximum RF signal levels |
| 70 | TableĀ 3 ā Digital signal levels at any system outlet |
| 71 | 5.5.2 RF signal level differences |
| 72 | 5.6 Mutual isolation between system outlets 5.6.1 Isolation between two subscribers 5.6.2 Isolation between individual outlets in one household 5.6.3 Isolation between forward and return paths TableĀ 4 ā Maximum level differences at any system outlet between distributed television channels |
| 73 | 5.7 Frequency response within a television channel at any system outlet 5.7.1 Amplitude response 5.7.2 Group delay TableĀ 5 ā Residual carrier level at television or FM radio output within the same outlet or between two different outlets TableĀ 6 ā Amplitude response variation |
| 74 | 5.8 Long-term frequency stability of distributed signals at any system outlet TableĀ 7 ā Group delay variation Table 8 ā Maximum deviation of conversion frequency for digitally modulated DVB signals |
| 75 | 5.9 Random noise TableĀ 9 ā RF signal-to noise ratio at system outlet (1 of 2) |
| 77 | 5.10 Interference to television channels 5.10.1 Single-frequency interference 5.10.2 Intermodulation noise 5.11 DVB (PSK, QAM, OFDM) additional performance requirements 5.11.1 BER 5.11.2 PER 5.11.3 White noise signal margin (SMWN) |
| 78 | 5.11.4 Intermodulation noise signal margin (SMIN) 5.11.5 MER 5.11.6 Phase noise of a DVB signal TableĀ 10 ā Modulation error ratio MER of DVB signals |
| 79 | 5.12 DAB performance TableĀ 11 ā Phase noise of a DVB signal (PSK, APSK and QAM) TableĀ 12 ā Phase noise of a DVB-T or DVB-C2 signal (COFDM) |
| 80 | 6 Performance requirements at receiving antennas 6.1 General 6.2 Method of measurement of field strength 6.2.1 General 6.2.2 Equipment required 6.2.3 Connection of the equipment |
| 81 | 6.2.4 Measurement procedure 6.2.5 Presentation of the results 6.3 Requirements 6.3.1 General |
| 82 | 6.3.2 Field strength requirements TableĀ 13 ā Minimum field strength levels recommended by CEPT [3] |
| 83 | 6.3.3 Quality of received signals TableĀ 14 ā Minimum signal level at the headend input for the reception of DAB signals TableĀ 15 ā Minimum signal level and RF signal-to-noise ratio at the headend input for stationary reception of DVB-T signals |
| 84 | TableĀ 16 ā Minimum signal-to-noise ratio S/N at the headend input for DVB-T2 signals |
| 85 | TableĀ 17 ā Minimum RF signal-to-noise ratio at the headend input for the reception of DVB-S or DVB-S2 satellite signals |
| 86 | 6.3.4 Safety 6.3.5 Electromagnetic compatibility (EMC) 6.4 Interference reduction 6.4.1 General 6.4.2 Active antennas 7 Performance requirements at home network interfaces of cable networks 7.1 General |
| 87 | 7.2 Requirements at HNI1 for passive coaxial home networks 7.2.1 General FigureĀ 33 ā Home network types used to define the requirements at several HNI types (coaxial) |
| 88 | 7.2.2 Signal levels at the HNI1 TableĀ 18 ā Signal level at HNI1 (1 of 2) |
| 90 | 7.2.3 Mutual isolation between two HNI1 7.2.4 Frequency response within any television channel at the HNI1 TableĀ 19 ā Maximum level differences at HNI1 |
| 91 | 7.2.5 Long-term frequency stability of distributed RF signals at HNI1 7.2.6 Random noise at the HNI1 7.2.7 Interference to television channels at the HNI1 TableĀ 20 ā Amplitude response variation at HNI1 TableĀ 21 ā Group delay variation at HNI1 |
| 92 | 7.2.8 Return path requirements at the HNI1 7.3 Requirements at HNI2 for active coaxial home networks 7.3.1 General 7.3.2 RF signal levels at the HNI2 |
| 93 | TableĀ 22 ā Signal level at HNI2 (1 of 2) |
| 95 | 7.3.3 Mutual isolation between two HNI2 7.3.4 Frequency response within any television channel at the HNI2 TableĀ 23 ā Maximum level differences at HNI2 |
| 96 | 7.3.5 Long-term frequency stability of distributed RF signals at HNI2 7.3.6 Random noise at HNI2 TableĀ 24 ā Amplitude response variation at HNI2 TableĀ 25 ā Group delay variation at HNI2 |
| 97 | TableĀ 26 ā Minimum RF signal-to-noise ratios at HNI2 (1 of 2) |
| 98 | 7.3.7 Interference to television channels at the HNI2 |
| 99 | 7.3.8 Return path requirements at the HNI2 7.4 Requirements at HNI3 and at system outlet or terminal input when the home network is mainly of balanced type 7.4.1 General 7.4.2 Requirements at HNI3 7.4.3 Requirements at system output |
| 100 | 7.4.4 Additional requirements at HNI3 for upstream transmission 7.5 Requirements at HNI3 (case C) 7.6 Requirements at HNI3 (case D) TableĀ 27 ā Minimum signal level at coaxial terminal input (case A) or at coaxial system outlet (case B) |
| 102 | AnnexĀ A (normative)Correction factors for noise A.1 Signal level measurement A.2 Noise level measurement Table A.1 ā Noise correction factor |
| 103 | Figure A.1 ā Noise correction factor CF versus measured level difference D |
| 104 | AnnexĀ B (normative)Null packet and PRBS definitions B.1 Null packet definition Table B.1 ā Null transport stream packet definition |
| 105 | B.2 PRBS definition |
| 106 | AnnexĀ C (normative)Digital signal level and bandwidth C.1 RF/IF power ("carrier") C.2 Bandwidth of a digital signal C.2.1 Occupied bandwidth |
| 107 | C.2.2 Noise bandwidth C.2.3 Equivalent signal bandwidth |
| 108 | C.3 Examples Table C.1 ā Examples of bandwidths for digital modulation techniques |
| 109 | AnnexĀ D (normative)Correction factor for a spectrum analyser |
| 110 | AnnexĀ E (informative)Differences in some countries E.1 Subclause 3.1.48, Norway E.2 Subclause 5.5.1, Japan E.3 Subclause 5.5.2, Japan |
| 111 | E.4 Subclause 5.6.1, Japan E.5 Subclause 5.7.1, Japan E.6 Subclause 5.7.2 Japan E.7 Subclause 5.8, Japan E.8 Subclause 5.9, Japan E.9 Subclause 5.10.1, Japan |
| 112 | E.10 Subclause 5.11.6, Japan Figure E.1 ā Single-frequency interference (64 QAM digital) (Japan) Figure E.2 ā Single-frequency interference (256 QAM digital) (Japan) |
| 113 | E.11 Subclause 6.3.3, Japan E.12 Clause 7, Japan |
| 114 | Bibliography |
