CEPT T R 25-05 E-1985 Planning and Coordination of the Land Mobile Services Operating in the Bands 174-230 MHz (Television Band III)《174-230 MHz频带(电视频带III)中运行地面移动业务规划和协调》.pdf
《CEPT T R 25-05 E-1985 Planning and Coordination of the Land Mobile Services Operating in the Bands 174-230 MHz (Television Band III)《174-230 MHz频带(电视频带III)中运行地面移动业务规划和协调》.pdf》由会员分享,可在线阅读,更多相关《CEPT T R 25-05 E-1985 Planning and Coordination of the Land Mobile Services Operating in the Bands 174-230 MHz (Television Band III)《174-230 MHz频带(电视频带III)中运行地面移动业务规划和协调》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Page 1 G9 TR25-05 E Recommendation T/R 25-05 (Nice 1985) PLANNING AND COORDINATION OF THE LAND MOBILE SERVICES OPERATING IN THE BANDS 174-230 MHz (TELEVISION BAND III) Recommendation proposed by “Radiocommunications” Working Group T/WG 3 (R) Text of the Recornmeridation adopted by the “Telecommiriic
2、ations” Commission : “The European Conference of Postal and Telecommunications Administrations, considering (a) that development of the land mobile service in the band 174-230 MHz has recently commenced, (b) that it is desirable that channelling arrangements for the land mobile services in the membe
3、r countries of the CEPT should be harmonized, (c) that such arrangements will help relieve difficulties of coordination, in particular in frontier areas, and thereby minimise delays in reaching agreement on assignments in those geographical areas, (d) that, where possible, uniform frequencies should
4、 be assigned in all the CEPT countries, (e) that use of the same type of modulation would also facilitate coordination between Administrations, (f) that in order to reduce the risks of harmful interference, the lowest possible antenna height and the lowest possible (g) that the latest information co
5、ncerning propagation and the minimum protected field strength necessary to obtain (h) that Band III will continue to be used by most CEPT countries for television, recommends in order to facilitate the coordination of land mobile assignments in the band 174-230 MHz in frontier areas, 1. that, wherev
6、er possible, the plan cited in Annex I shall be utilised for the land mobile service in the member countries of the CEPT, 2. that the Administrations which have not yet reached a final decision on designating the nominal frequencies for assignment or which are in a position to alter their normal uti
7、lisation plan shall assign frequencies in the series: 174,000 MHz -I- n x 12.5 kHz (n = 1, 2, 3, 4, .), 3. that frequency or phase modulation shall be used, 4. that effective radiated power (e.r.p.) shall not exceed 25 watts and that, where possible, the e.r.p. and the antenna height shall be adjust
8、ed in order to obtain complete coverage of the required service area, 5. that the coordination criteria given in Annex II shall be used for coordinating the land mobile service assignments in this frequency band between the CEPT member countries.” radiated power should normally be used, the performa
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