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The present document applies to Mobile Earth Station (MES) radio equipment which have the following characteristics: 
• the MES has both transmit and receive capabilities and operate in a Satellite-Personal Communications 
Network (S-PCN). An S-PCN MES can be a handheld, portable, vehicle-mounted, host connected, semi-fixed 
or fixed equipment, or can be an element in a multi-mode terminal. It consists of a number of modules with 
associated connections and user interface, or can be a self-contained single unit; 
• these MESs are controlled and monitored by Control Monitoring Functions (CMF). The CMF is outside the 
scope of the present document; 
• if the MES is an element in a multi-mode terminal, unless otherwise stated in the present document, its 
requirements apply only to the S-PCN MES element of the terminal operating in the MSS frequency bands 
given in table 1; 
• the MES is capable in operating in all or part of the frequency bands shown in table 1. 
Table 1: Mobile Satellite Service (MSS) frequency bands 
MES 
MSS frequency bands 
Transmit 
Receive 
1 610 MHz to 1 626,5 MHz 
1 613,8 MHz to 1 626,5 MHz 
Receive 
2 483,5 MHz to 2 500,0 MHz 
NOTE: The relationship between the present document and essential requirements of article 3.2 of Directive 
2014/53/EU [i.3] is given in annex A.

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 
149,9 to 150,05 
MSS 
137,025 to 137,175 
MSS 
235 to 322 
mss 
MSS 
137,175 to 137,825 
335,4 to 399,9 
MSS 
MSS 
137,825 to 138 
399,9 to 400,05 
mss 
MSS 
235 to 322 
335,4 to 399,9 
MSS 
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 [i.3] (RE Directive). 
NOTE 2: The relationship between the present document and essential requirements of article 3.2 of the Directive 
2014/53 [i.3] is given in Annex A.