17Protection requirements

17 Protection requirements

ITU-R Recommendations (1) Licensees of 2.5 GHz spectrum licences should have regard to: (a) ITU-R Recommendation M.1464 “Characteristics of non-meteorological radiolocation radars and characteristics and protection criteria for sharing studies for the aeronautical radionavigation and radars in the radiodetermination service operating in the frequency band 2 700-2 900 MHz” for characteristics for coordination with ground-based radars; (b) ITU-R Recommendation M.1461 “Procedures for determining the potential for interference between radars operating in the radiodetermination service and systems in other services” for information on procedures for coordination; (c) ITU-R Recommendation M.1849 “Technical and operational aspects of ground-based meteorological radars” for technical and operational characteristics of meteorological radars and related interference protection criteria. ARS (2) Protection is to be afforded for all licensed fixed receivers used for ARS operating in the frequency band 2700 MHz to 2900 MHz, included in the Register before a fixed transmitter operating under a 2.5 GHz spectrum licence was included in the Register. (3) Coordination is typically required for all fixed transmitters located within 10 kilometres of a fixed receiver used for ARS that is included in the Register with the station class ‘AL’. Department of Defence (4) Protection is to be afforded for all radiocommunications receivers operating in the frequency band 2700 MHz to 2900 MHz for a radiodetermination service used by the Department of Defence. Protection is achieved if the out-of-band emissions from a station operating under a spectrum licence in the 2.5 GHz band do not exceed a maximum power flux density limit of ‑125 dBm/MHz/m2 at the antenna height, at the radar site. (5) Additional guidance on coordination with radiodetermination services operated by the Department of Defence is provided in RALI MS 35. RLS (6) Protection is to be afforded to all licensed fixed receivers used for RLS operating in the frequency band 2700 MHz to 2900 MHz, included in the Register before a fixed transmitter operating under a 2.5 GHz spectrum licence was included in the Register. (7) Coordination is typically required for all fixed transmitters located within 20 kilometres of a fixed receiver used for RLS that is included in the Register with the station class ‘LR’.