1、QUESTION ITU-R 7-6/5*,*Characteristics of equipment for the land mobile servicebetween 25 and 6 000 MHz(1956-1966-1970-1974-1990-1992-1997-2007)The ITU Radiocommunication Assembly,consideringa) that there is a necessity for efficient use of the frequency bands allocated to the land mobileservice;b)
2、that an interchange of information on the requirements of administrations concerning thetechnical characteristics of equipment used in land mobile services between 25 and 6 000 MHz,would be advantageous in the development of those services;c) that an exchange of information among different countries
3、 concerning the practices appliedto the assignment of channels and the experience gained in the operation of land mobile servicesbetween 25 and 6 000 MHz is of value in general;d) that a certain measure of agreement may be desirable on the characteristics of the landmobile equipment that are used in
4、 the border areas of neighbouring countries to minimize mutualinterference;e) that a certain measure of agreement may also be desirable on the practices governing theallocation and use of channels in land mobile services between 25 and 6 000 MHz in border areas;f) that a degree of standardization is
5、 desirable, since the land mobile service connected tothe national network may form part of an international connection;g) that it is desirable to determine equipment technical characteristics, to facilitate theplanning of channel allocation in the land mobile bands;h) that it is also desirable to i
6、nvestigate the relationship between subjective measurementtechniques and objective measurement techniques for the various systems operating in the landmobile service,decides that the following Questions should be studied1 What are the technical requirements of administrations concerning equipment us
7、ed in landmobile services between 25 and 6 000 MHz that are of international importance in the developmentof such services, e.g. transmitter power, antenna characteristics, emission characteristics, frequencytolerance?2 To what extent would it be desirable to standardize the performance characterist
8、ics of landmobile equipment between 25 and 6 000 MHz internationally?_* This Question should be brought to the attention of the International Electrotechnical Commission (IEC)and the Telecommunication Standardization Sector.* Former Question ITU-R 7-6/8.- 2 -3 What are the equipment characteristics (and/or methods of measurement) for the variousland mobile services between 25 and 6 000 MHz?further decides1 that the results of the above studies should be included in one or more Recommendations;Reports or Handbooks;2 that the above studies should be completed by 2010.Category: S2
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