Page:United States Statutes at Large Volume 54 Part 2.djvu/373

 54STAT.] MULTILATERAL-TELECOMMUNICATION-APR. 8, 1938 Note I.- The administrations shall endeavor to profit by the progress of the art in order to reduce frequency tolerances progressively. Note 2.-It shall be understood that ship stations working in shared bands must observe the tolerances applicable to land stations and must conform to article 7 §21 (2) (a). [No. 186]. Note S.- Radiotelephone stations with less than 25 watts' power, employed by maritime beacons for communications with beacons isolated at sea, shall be comparable, with reference to frequency stability, to mobile stations indicated in C above. Note 4. - Sh ips equipped with a transmitter, the power of which is under 100 watts, working in the band of 1,560-4,000 kc (192.3 -75 m), shall not be subject to the stipulations of column 1. APPENDIX 2 Table of Tolerances for the Intensity of Harmonics of Fixed, Land, and Broadcasting Stations (See article 6) 1593 Ante, p. 1471. Ante, p. 1429. Frequency bands Frequency under 3,000 kc (wavelength above 100 m) Frequency above 3,000 kc (wavelength under 100 m) Tolerances The field intensity produced by any har- monic must be under 300 pv/m at 5 km from the transmitting antenna. The power of a harmonic in the antenna must be 40 db under the power of the fundamental, but in no case may it be above 200 milliwatts.2 I With regard to tolerances for mobile stations, an attempt shall be made to achieve, so far as possible, the figures specified for fixed stations. A transmitter the harmonic intensity of which is not above the figures specified but which nevertheless causes interference, must be subjected to special measures intended to eliminate such interference. I I

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