EVS-EN 301 721 V2.1.1:2016

The present document applies to Mobile Earth Stations (MES) providing Low Bit Rate Data Communications
(LBRDC) using Low Earth Orbiting (LEO) satellites and which have the following characteristics:
- the MES could be 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 types are capable of operating in all or any part of the frequency bands given in table 1.
Table 1: Frequency ranges
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 LMSS 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 LMSS 235 to 322 MSS
335,4 to 399,9 MSS
400,15 to 401 MSS
The present document is intended to cover the provisions of Directive 2014/53/EU [7] (RE Directive) article 3.2 which
states that "….radio equipment shall be so constructed that it both effectively uses and supports the efficient use of
radio spectrum in order to avoid harmful interference".
In addition to the present document, other ENs that specify technical requirements in respect of essential requirements
under other parts of article 3 of the RE Directive [7] may apply to equipment within the scope of the present document.
NOTE 1: A list of such ENs is included on the ETSI web site.
NOTE 2: The MESs are controlled and monitored by a Network Control Facility (NCF). The NCF is outside the
scope of the present document.