1、QUESTION ITU-R 243/5*System characteristics and sharing criteria for the fixed serviceoperating in frequency bands below 1 GHz(1997)The ITU Radiocommunication Assembly,consideringa) that the applications of systems in the fixed service (FS) in frequency bands below 1 GHzare not as extensive as those
2、 operating in frequency bands above 1 GHz;b) that the applications to other services are increasingly proposed in the frequency bandsbelow 1 GHz;c) that the FS in frequency bands below 1 GHz is playing an important role in certainapplications such as medium and low capacity telecommunication links f
3、or data and telephonecommunication;d) that these systems should be adequately protected from interference caused by systems inother services;e) that these systems have been extensively used for many years in certain countries includingdeveloping countries;f) that, however, the ITU-R is lacking data
4、on the basis of which sharing studies should becarried out,decides that the following Questions should be studied1 What are typical characteristics of systems in the FS operating in each frequency bandbelow 1 GHz allocated to the FS (see Notes 1 and 2)?2 What are preferred protection criteria for sy
5、stems in the FS below 1 GHz sharing frequencybands with other services (see Note 3)?NOTE 1 Administrations and other organizations (in particular, the Federative Republic of Braziland Finland) are requested to submit to the ITU-R FS system parameters (including applicableperformance objectives) for
6、frequency sharing in a format similar to those in the tables ofRecommendation ITU-R F.758.NOTE 2 Recommendations ITU-R F.754 and ITU-R F.1103 give preferred system characteristicsfor the FS in frequency bands below 1 GHz, but additional parameters are required for sharingstudies.NOTE 3 It is recognized that the protection criteria for systems in the FS below 1 GHz may bedifferent depending on the sharing scenario._* Former Question ITU-R 216/9.
