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EN 302 977 V2.1.1 Standard



#equipment #present #may #document #operation


Radio equipment Directive (2014/53/EU)

  Last Official Journal reference

Tuesday 22nd of March 2022


Satellite Earth Stations and Systems (SES); Harmonised Standard for Vehicle-Mounted Earth Stations (VMES) operating in the 14/12 GHz frequency bands covering the essential requirements of article 3.2 of the Directive 2014/53/EU


The present document applies to Earth Stations located on board Vehicles, which have the following characteristics. In-vehicle Services Interface Stabilization & Tracking mechanism Antenna Enclosure / Radome Control and Monitoring Function Antenna Controller Modem External mounted equipment (EME) Internally mounted equipment (IME) Externally or internally mounted equipment LNA BDC HPA BUC Radio Antenna Control Facility Interface Figure 1: VMES System Overview • The VMES may transmit and receive data when the vehicle is in motion and also when the vehicle is stationary. • The VMES operates on wheeled or tracked vehicles and, therefore, may be subject to occasional disturbances and interruptions in the satellite link. • The VMES is operating as part of a satellite network (e.g. star, mesh or point-to-point) used for the distribution and/or exchange of information. • The VMES is comprised of all the equipment, electrical and mechanical, from the antenna itself to the interface with other communications equipment on a vehicle (usually referred to as the terrestrial interface). • The VMES transmits on single carrier in the frequency range 14,00 GHz to 14,50 GHz, which is a band allocated to the Fixed Satellite Services (FSS) (Earth-to-space) among other services. However, operation of the VMES is intended to be restricted to the lower half of the band in and near those countries that have allocated Fixed Service (FS) to the upper half. Local regulation may permit operation in the upper half of the band. NOTE 1: For the purposes of the present specification, OFDM modulation is considered as a single carrier. • The VMES receives in one or more frequencies within the range from 10,70 GHz to 12,75 GHz in bands allocated to the Fixed Satellite Services (FSS) (space-to-Earth) or the Broadcast Satellite Service (BSS) (space-to-Earth), depending on the ITU Region where the VMES is located. • The VMES uses linear or circular polarization. • The VMES is designed to operate through a geostationary satellite (or a cluster of co-located geostationary satellites) that is at least 3° away from any other geostationary satellite operating in the same frequencies and over the same coverage area. NOTE 2: Satellites may be spaced closer than 3°. In such cases, the satellite operator will inform the VMES client of the requirements of the system coordination agreements. • The VMES transmits at elevations greater than or equal to 7° relative to the local horizon. • The VMES is designed for unattended operation. • The VMES is designed for both mobile and stationary operation. In the case of stationary operation, the VMES should not be accessible to the general public and operated safely. • The VMES is controlled and monitored by an Antenna Control Facility (ACF). This function may be performed centrally (e.g. for a network of VMESs with a central hub) or it could be performed within the VMES for autonomous control. The ACF is outside the scope of the present document. The present document applies to the VMES with its ancillary equipment and its various telecommunication ports, and when operated within the boundary limits of the operational environmental profile as declared by the applicant and when installed as required by the applicant's declaration or in the user documentation. The present document is intended to cover the provisions of Directive 2014/53/EU [9] (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 spectrumin order to avoid harmful interference". NOTE 3: Operational requirements are defined by national administrations and by relevant ECC Decisions. 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 Directive 2014/53/EU [9] (RE Directive) may apply to equipment within the scope of the present document. NOTE 4: A list of such ENs is included on the web site


Wednesday 12th of April 2017

  Essential Requirement

Article 3(2)

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