CEPT T R 25-05 E-1988 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 尼斯1985年》.pdf

《CEPT T R 25-05 E-1988 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 尼斯1985年》.pdf》由会员分享，可在线阅读，更多相关《CEPT T R 25-05 E-1988 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 尼斯1985年》.pdf（5页珍藏版）》请在麦多课文档分享上搜索。

1、STD.CEPT TIR 25-05 E-ENGL 1988 M 232h414 0014h59 87T m T/R 25-05 E Page 1 Distribution: B 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 the “Radiocommwiications“ Working G

2、roup TNG 3 (R) Text of the Recommendation adopted by the “Telecommunications“ Commission: The European Conference of Postal and Telecommunications Administrations, consiakring (a) that development of the land mobile service in the band 174-230 MHz has recently commenced, (b) that it is desirable tha

3、t channelling arrangements for the land mobile services in the member countries of the CER should be harmonised, (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 geogr

4、aphical areas, (d) that, where possible, miform frequencies should be assigned in all the CER 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

5、height and the lowest possible radiated power should normally be used, (g) that the latest information concerning propagation and the minimum protected field strength necessary to obtain the performance required ought to be considered, (h) that Band III will continue to be used by most CEPT countrie

6、s for television, recommends in order to facilitate the coordination of land mobile assignments in the band 174-230 MHz in frontier areas, 1. that, wherever possible, the plan cited in Annex I shall be utilised for the land mobile service in the member countries of the CEP. 2. that the Administratio

7、ns 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 utilisation plan shall assign frequencies in the series: 174,000 MHz + n x 12.5 kHz (n=1,2,3,4 ,. ), 3. that frequency or phase modulation shall be us

8、ed, 4. that effective radiated power (e.1.p.) shall not exceed 25 watts and that, where possible, the e.r.p. and the antenna height shall be adjnsted in order to obtain complete coverage of the required service area, Edition of September 15,1988 5. that the coordination criteria given in Annex II sh

9、all be used for coordinating the land mobile service assignments in thk frequency band between the CEPT member counhies.” Left blank Annex I CHANNELLING PLAN FOR FREQUENCY SUB-BANDS BETWEEN 174 AND 230 MHz S Abbreviations: S = Single kequency simplex sub-bands. B = Base station transmit sub-bands. M

10、 = Mobile station transmit sub-bands. Notes: 1. 2. Separation distance for simplex or two-kequency duplex operation, 9 MHz. S Subbands (the Single Frequency Simplex Subbands) may also be utilised by low power systems or services operating on a non-intederence basis to land mobile or broadcasting ser

11、vices. Edition of September 15,1988 Annex II TECHNICAL CRITERLA FOR COORDINATION 1. The minimum protected median field strength shall be 22 dB (pV/m). 2. Calculations shail be carried out ushg CCIR Recommendation 3704 (Geneva 1982). Appropriate values for the interfering field for 10% of the time an

12、d 50% of the locations shall be used. Variations in field strength as a fuiidon of receiving antenna height above ground are currently being considered by the CCIR. 3. The protection ratio shall be 10 dB. Edition of September 15,1988 232b434 0034343 T8 W D DNK E EST F T/R 25-05 Planning and coordina

13、tion of the Land Mobile Services operating in the Band 174-230 MHz (Television Band III) No No Planned Under study Yes In this frequency band the broadcasting service is operational CZE No POR ROU S Planned No No In this frequency band the broadcasting service is operational SUI SVN TUR Planned No No