Standards and deliverables of EN 60728 series deal with cable networks including equipment and associated methods of measurement for headend reception, processing and distribution of television and sound signals and for processing, interfacing and transmitting all kinds of data signals for interactive services using all applicable transmission media. These signals are typically transmitted in networks by frequency-multiplexing techniques.<\/p>\n
This includes for instance<\/p>\n
regional and local broadband cable networks,<\/p>\n<\/li>\n
extended satellite and terrestrial television distribution systems,<\/p>\n<\/li>\n
individual satellite and terrestrial television receiving systems,<\/p>\n<\/li>\n<\/ul>\n
and all kinds of equipment, systems and installations used in such cable networks, distribution and receiving systems.<\/p>\n
The extent of this standardization work is from the antennas and\/or special signal source inputs to the headend or other interface points to the network up to the terminal input of the customer premises equipment.<\/p>\n
The standardization work will consider coexistence with users of the RF spectrum in wired and wireless transmission systems.<\/p>\n
The standardization of any user terminals (i.e. tuners, receivers, decoders, multimedia terminals etc.) as well as of any coaxial, balanced and optical cables and accessories thereof is excluded.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 6<\/td>\n | Foreword <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | 1 Scope 1.1 General 1.2 Specific scope of CLC\/TR 50083-2-1 <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 2 Normative references 3 Term, definitions, symbols and abbreviations 3.1 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 3.2 Symbols <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 3.3 Abbreviations 4 Considerations on EMC measurements 4.1 General <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 4.2 General EMC measurement considerations Figure 1 \u2013 Radiated and conducted emissions measurement using a measuring receiver Figure 2 \u2013 Radiated and conducted emissions measurement using a spectrum analyser <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 4.3 Envelope (peak) detection mode Figure 3 \u2013 Example of the output signal from an envelope detector with two carriers within the IF filter bandwidth 4.4 Quasi-peak detection mode <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Figure 4 \u2013 The quasi-peak detector output depends on impulse repetition frequency 4.5 Average detection mode Figure 5 \u2013 Average detection mode where the envelope detector signal output is filtered with a low-pass filter of bandwidth much less than RBW of IF filter 5 EMC measurement apparatus 5.1 Measuring receiver 5.1.1 General <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Figure 6 \u2013 Electrical circuit of a measuring receiver detector 5.1.2 The envelope detector 5.1.3 The peak detector 5.1.4 The quasi-peak detector <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Table 1 \u2013 Time constants for quasi-peak detector 5.2 EMC analyser <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 5.3 Response of the measuring receiver (or EMC analyser) to disturbing signals 5.3.1 Sinusoidal signals Figure 7 \u2013 Amplitude modulated waveform at the detector input Table 2 \u2013 Meter readings with various types of detectors <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 5.3.2 Analogue television signals Figure 8 \u2013 Analogue television signal modulated waveform 5.3.3 Impulse disturbance signals 5.3.3.1 General <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Table 3 \u2013 Test pulse characteristics for quasi-peak measuring receivers Figure 9 \u2013 Pulse response curve of quasi-peak detector receivers to different pulse repetition frequencies (PRF) <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 5.3.3.2 Relationship between indication of average and quasi-peak measuring receiver 5.3.3.3 Relationship between indication of RMS meter and quasi-peak meter <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Table 4 \u2013 Response to impulse disturbance signals with various types of detectors 5.3.4 Random impulse noise signals <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Figure 10 \u2013 Random noise modulated waveform at the detector input <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Table 5 \u2013 Response to random signals with various types of detectors 5.4 Response of a spectrum analyser to disturbing signals 5.5 Correction factors for bandwidth and detectors 6 Measurement of analogue TV modulated signals 6.1 General considerations <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 6.2 Correction factors for bandwidth and detectors 7 Measurement of QAM modulated signals 7.1 Peak to average ratio Figure 11 \u2013 Example of I-Q diagram (constellation diagram) for QAM signals <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Table 6 \u2013 Peak-to-average ratios for QAM modulated signals 7.2 Correction factors for bandwidth and detectors <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 7.3 Correction factors between different detectors Table 7 \u2013 Correction factors Z (dB) for transforming a measured power into RMS power over the whole signal bandwidth <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 7.4 Fraction of the time the mean power is exceeded Table 8 – Fraction of the time where the mean level is exceeded for 16 QAM and 32 QAM signals. Bolometer measurements 7.5 Linear operation of amplifiers 7.6 Measurements on cable modems <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 7.7 Measuring equipment setting for QAM signal level measurement <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | Annex A (informative) Field strength measurement A.1 General A.2 Connection of the equipment A.3 Measurement procedure A.3.1 Analogue modulated signals <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | A.3.2 Digitally modulated signals <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | A.4 Field strength due to a transmitted power <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | A.5 Received voltage due to a radiated field Figure A.1 \u2013 Antenna coefficient for isotropic antenna, \u03bb\/2 dipole and log-periodic antenna with gain G = 6 dB respect to isotropic antenna <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Table A.1 \u2013 Received signal level UR with a \u03bb\/2 dipole in a field E = 27 dB(\u03bcV) <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Annex B (informative) LISN (Line Impedance Stabilisation Network) Figure B.1 \u2013 LISN circuit for one side of the line relative to earth ground Figure B.2 \u2013 LISN impedance at the EUT port, versus frequency <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Cable networks for television signals, sound signals and interactive services – Electromagnetic compatibility measurements<\/b><\/p>\n |