What is PD IEC/TR 60728-3-2- Cable networks for television signals, sound signals, and interactive services about?
PD IEC/TR 60728-3-2 is a safety standard on cable networks for television signals, sound signals, and interactive services.
PD IEC/TR 60728-3-2 is applicable to the measurement of 5th order non-linearity for active electronic equipment which carries only digitally modulated television signals, sound signals and signals for interactive services.
This method of measurement is specifically applicable to MATV installations but could be applied to broadband and channel selective amplifiers used in all kinds of cable networks.
Note 1: The methods of measurement of non-linearity (intermodulation products) applicable to active equipment, when loaded with analogue signals, considered that third-order intermodulation products were the most important ones. The new era of television digital signals, transmitted according to DVB-S/S2, DVB-C/C2, and DVB-T/T2 modulation formats have shown that the non-linear distortions (intermodulation products) inactive equipment, when loaded with digital signals, are significant up to the 5th order.
Note 2: With this method of measurement it is possible to obtain information on non-linear distortions (intermodulation products) up to the 5th order in active wideband equipment, using only 5 carriers, placed in an appropriate and suitable way in the equipment bandwidth. Moreover, with this method of measurement, it is possible to obtain information on non-linear distortions (up to the 5th order) in narrowband equipment (channel amplifiers and channel frequency converters) carrying DVB-C/C2 and/or DVB-T/T2 signals.
Note 3: 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.
Who is PD IEC/TR 60728-3-2- Cable networks for television signals, sound signals, and interactive services for?
PD IEC/TR 60728-3-2 on cable networks for television signals, sound signals, and interactive services is relevant to:
- Manufacturers of cable networks for television signals, sound signals, and interactive services
- Manufacturers of measuring equipment
- Manufacturers of intermodulation products
- Testing authorities
- Biomedical engineers
Why should you use PD IEC/TR 60728-3-2- Cable networks for television signals, sound signals, and interactive services?
Standards and deliverables of PD IEC/TR 60728-3-2 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.
This includes, for instance:
- Regional and local broadband cable networks
- Extended satellite and terrestrial television distribution systems
- Individual satellite and terrestrial television receiving systems
and all kinds of equipment, systems, and installations used in such cable networks, distribution and receiving systems.
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 equipment on the customer's premises. The standardization work considers coexistence with users of the RF spectrum in wired and wireless transmission systems.
Overall, PD IEC/TR 60728-3-2 is useful as it provides guidance on the distribution network or system designed to provide sound and television signals received by a terrestrial receiving antenna to households in one or more buildings.