EVS-EN 301 721 V2.2.1:2026

The present document specifies technical characteristics and methods of measurements for Mobile Earth Stations (MES) providing Low Bit Rate Data Communications (LBRDC) using Low Earth Orbit (LEO) satellites and which have the following characteristics:
- the MES as covered by the present document are a Based MES (BMES), a Vehicle mounted MES (VMES), or a Portable MES (PMES);
- the MESs operate through satellites in Low Earth Orbit (LEO) as part of a network providing Low Bit Rate Data Communications (LBRDC);
- these radio equipment are designed to operate in all or any part of the frequency bands given in table 1.
- The MESs have to be part of a satellite network and controlled and monitored by a Network Control Facility (NCF). The specification of the NCF is outside the scope of the present document.
Table 1: Frequency ranges in Transmit and Receive frequencies
MES Transmit frequencies and Service allocations (MHz); MES Receive frequencies and Service allocations (MHz)
148 to 149,9; MSS; 137 to 137,025; MSS;
149,9 to 150,05; MSS; 137,025 to 137,175; MSS;
235 to 322; MSS; 137,175 to 137,825; MSS;
335,4 to 399,9; MSS; 137,825 to 138; mss;
399,9 to 400,05; MSS; 235 to 322; MSS;
335,4 to 399,9; MSS;
400,15 to 401; MSS
NOTE 1: The acronyms "MSS" and "mss" refer to mobile satellite service (See list of abbreviations). Capital letters "MSS" refer to Primary MSS service. Lower case "mss" refers to secondary MSS service.
The present document is intended to cover the provisions of article 3.2 of Directive 2014/53/EU (RE Directive).
NOTE 2: The relationship between the present document and essential requirements of article 3.2 of the Directive 2014/53 is given in Annex A.