Satellite Earth Stations and Systems (SES); Transmit-Only or Transmit-and-Receive Very Small Aperture Terminals (VSATs) Used for Communications Operating in the Fixed Satellite Service (FSS) 11/12/14 GHz Frequency Bands Second Edition
"This European Telecommunication Standard (ETS) provides specifications for the standardisation of the characteristics of transmit-only or transmit-and-receive Very Small Aperture Terminals (VSATs) operating as part of a satellite network (e.g. star@ mesh or point-to-point) used for the distribution and/or exchange of information between users. In such a network a Centralised Control and Monitoring Function (CCMF) is responsible for the monitoring and control of VSATs. These VSATs have the following characteristics: - operating in the exclusive part of the Ku-band allocated to the Fixed Satellite Services (FSS)@ 14@00 to 14@25 GHz (Earth-Space)@ 12@50 to 12@75 GHz (Space-Earth)@ and/or in the shared parts of the Ku-band@ allocated to the FSS and Fixed Services (FS)@ 14@25 to 14@50 GHz (Earth-Space) and/or 10@70 to 11@70 GHz (Space-Earth); - in these frequency bands linear polarization is normally used and the system operates through satellites at 3??pacing; - designed usually for unattended operation; - antenna diameter not exceeding 3@8 m@ or equivalent corresponding aperture. The equipment considered in this ETS comprises both the ""outdoor unit""@ usually composed of the antenna sub-system and associated power amplifier and Low Noise Block (LNB)@ and the ""indoor unit"" composed of the remaining part of the communication chain@ including the cable between these two units. This ETS applies to the VSAT with its ancillary equipment and its various terrestrial ports@ and operated under the conditions which are within the ranges of humidity@ temperature and supply voltage declared by the manufacturer. EMC specifications are contained in ETS 300 673 [3]. This ETS does not contain any specification or information on the installation of the VSATs. The specifications have been selected to ensure an adequate level of compatibility for VSATs. The levels@ however@ do not cover extreme cases which may occur in any location but with a low probability of occurrence. In such a case it may be necessary to use special protection supplied to either the source of interference@ or the interfered part or both. This ETS deals with two types of specification: - specifications defined in order to protect other users of the frequency spectrum@ both satellite and terrestrial@ from unacceptable interference. In addition@ these specifications are specified for the purposes of structural safety and lightning protection as well as protection from harmful interference; - specifications related to characteristics which contribute to the quality of reception by providing the VSAT with minimum interference protection from other radio systems. These specifications apply if required by the manufacturer."