CEPT T R 25-04 E-1988 Coordination in Frontier Regions of Frequencies for the Land Mobile Service in the Bands between 862 and 960 MHz《边境区862-960 MHz频段地面移动业务频率协调》.pdf
《CEPT T R 25-04 E-1988 Coordination in Frontier Regions of Frequencies for the Land Mobile Service in the Bands between 862 and 960 MHz《边境区862-960 MHz频段地面移动业务频率协调》.pdf》由会员分享,可在线阅读,更多相关《CEPT T R 25-04 E-1988 Coordination in Frontier Regions of Frequencies for the Land Mobile Service in the Bands between 862 and 960 MHz《边境区862-960 MHz频段地面移动业务频率协调》.pdf(3页珍藏版)》请在麦多课文档分享上搜索。
1、CEPT T/R*25-OYE m 232bYLY OOOb875 Y TIR 25-04 E Page 1 Recommendation T/R 25-04 (Stockholm 1977, revised in Vienna 1982 and Odense 1986) COORDINATION IN FRONTIER REGIONS OF FREQUENCIES FOR THE LAND MOBILE SERVICE IN THE BANDS BETWEEN 862 AND 960 MHz Recommendation proposed by the “Radiocommunication
2、s” Working Group T/WG 3 (R) Text of the Revised Recommendation adopted by the “Telecommunications” Commission: “The European Conference of Postal and Telecommunications Administrations, considering (a) that the Radio Regulations, as revised by the WARC, Geneva 1979, include allocations of frequency
3、bands above (b) that in all CEPT countries such allocations to the mobile service as a primary service are found in the band (c) that a radio system for the maritime mobile service may also operate in the above-mentioned band and that such (d) that it is necessary to draft directives with a view to
4、facilitating coordination in frontier areas, (e) that CEPT Members should be in a position to give timely guidance to their radio industry, and that it is in the interests of harmonization that such guidance should be the same in all CEPT countries, (f) that it is desirable, before these frequencies
5、 are brought into service, that certain factors capable of facilitating coordination in frontier areas be taken into account, (8) that all experience gained to date in the frequency bands below 500 MHz has shown that a large number of parameters (technical and operational) need to be standardized if
6、 wastage of frequencies in frontier areas is to be avoided, 790 MHz to the mobile service, except the aeronautical mobile service, between 862 and 960 MHz, a system could probably be used for the land mobile service, (h) that CEPT Members should utilize sub-bands in accordance with Recommendation T/
7、R 75-02 E, recommends that in future coordination of frequencies for the land mobile service between 862 and 960 MHz in frontier areas CEPT Members should take as their guidelines the following provisions: 1. that, for analogue systems, separation between channels should be the same in all CEPT Memb
8、er Countries, 1.1. that separation should be 25 kHz, 1.2. the central frequency in each channel should have the same value, taken from the series 862.0125 MHz + n x 25 kHz (n = O, 1,2, 3, .); interleaved channels with a central frequency given by the senes 862.025 MHz + n x 25 kHz (n = O, 1, 2, 3, .
9、) may also be used but are subject to the agreement of the Administrations affected, the same type of modulation should be used for the same frequency sub-bands in ali CEPT Member Countries, amplitude modulation should be prohibited for analogue-type signals, frequency separation for reception and t
10、ransmission should be 45 MHz, in the case of the allocation of sub-bands for specific uses, all Administrations should, as far as possible, reserve the same sub-bands for the same specific uses, in order to facilitate bilateral and multilateral coordination between Administrations, effective radiate
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