Page:United States Statutes at Large Volume 54 Part 2.djvu/1296

 2517 54 STAT.] INTER-AMERICAN-RADIO COMMUNICATIONS-DEC. 13, 1937 TABLE IV 1 GzNURAL FBRQUmINCY ALLOCATION TO VABIOUS SBEVICES 4000-25000 Kc/s. Ante, pp. 1447,1449. (See special note below) Frequency (Kc/s) Service 4000- 5500 Fixed and Mobile (1) 5500- 5570 Maritime Mobile 5570- 5700 Aeronautical 5700- 5900 Fixed 5900- 6000 Fixed (2) 6000- 6150 Broadcasting (3) 6150- 6675 Mobile (International air calling frequency 6210 Kc/s) 6675- 7000 Fixed 7000- 7300 Amateur 7300- 8200 Fixed 8200- 8550 Mobile 8550- 8900 Fixed and Mobile 8900- 9500 Fixed 9500- 9600 Broadcasting (3) 9600- 9700 Fixed (2) 9700-11000 Fixed. 11000-11400 Mobile. 11400-11700 Fixed. 11700-11900 Broadcasting (3) 11900-12300 Fixed 12300-12825 Mobile 12825-13350 Fixed and Mobile. 13350-14000 Fixed 14000-14400 Amateur 14400-15100 Fixed 15100-15350 Broadcasting (3) 15350-16400 Fixed 16400-17100 Mobile 17100-17750 Fixed and Mobile 17750-17800 Broadcasting (3) 17800-21450 Fixed 21450-21550 Broadcasting (3) 21550-22300 Mobile 22300-24600 Fixed and Mobile 24600-25000 Mobile ' [Modified by the Cairo, 1938, revision (Treaty Series 948).] NOTES (1) 46006-500 Kol/s. The high contracting parties each agree to make a special study of this band of frequencies with a view to solving the problem of national broadcasting in those countries within the central sone located to the south of Panama. This study should be presented to the Cairo Conference for consideration and should be accompanied by pertinent recommendations based on the following considerations: a. The use of directional antennas by broadcasting stations to avoid inter- ference to services carried on in other regions. b. Determination of the maximum night power for broadcasting stations within this band of frequencies. c. The maximum total width of the broadcast band within the frequency range 4500-5200 Kc/s. should be not greater than 300 Kc/s. (2) 5900-6000 and 9600-9700 Kc/s. The proposals of Brazil to assign the frequency bands 5900 to 6000 Ke/s. and 9600 to 9700 kc/s. to broadcasting shall be studied prior to the Cairo Conference in accordance with Note 3 below.

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