Page:United States Statutes at Large Volume 54 Part 2.djvu/201

 54 STAT.] MULTILATERAL-TELECOMMUNICATION-APR. 8, 1938 1421 and the frequency which this emission should have (frequency noti- fied or frequency chosen by the operator). [11] Power of a radio transmitter: The power of a radio transmitter is the power supplied to the antenna. For the types of transmitters indicated hereinafter, the following data are applicable: [12] Continuous wave radiotelegraphy:In the case of a transmitter employing type-Al or -A2 emissions the power is that delivered to the antenna during the marking (key-closed) condition. [13] Conventional double-sideband type: In the case of an am- plitude-modulated wave transmitter of the conventional double- sideband type the power in the antenna is represented by two numbers, one indicating the value of the carrier-wave power supplied to the antenna and the other indicating the actual maximum percentage of modulation used.1 [14] Other types: In the case of amplitude-modulated wave trans- mitters of other than the conventional double-sideband type, the maximum power delivered to the antenna shall be given as the power of the transmitter. [15] §2 [16] Fixed service: A service carrying on radio communication of any kind between fixed points, with the exception of the broadcasting services and special services. [18] Mobile service: A radio service carried on between mobile and land stations and by mobile stations communicating among them- selves, excluding special services (see the annex to the Convention). 49tat. 2443. [19] Aeronautical service: A radio service carried on between aircraft stations and land stations and by aircraft stations among themselves. This term shall also apply to fixed and special radio services intended to insure the safety of aerial navigation. [20] Broadcastingservice: A service carrying on the broadcasting of transmissions intended to be received by the general public; this service shall include exclusively: * [21] (a) radiotelephone service: service carrying on the broad- casting of transmissions for reception at a distance of voice and music; [22] (b) television service: service carrying on the broadcasting of transmissions for the visual reception at a distance of fixed or moving objects. s [23] Facsimile service: A service making transmissions for the re- production at a distance of fixed images in a permanent form. 4 L24] Special service: A telecommunication service carried on espe- cially for the needs of a specific service of general interest and not [171 I This percentage shall be expressed in z percent. [28] See the exception "facsimile service" [nos. 23 and 30]. [29] "Objects" is used here in the optical sense of the word. [301 ' This facsimile service may be carried on by broadcasting Dtation., fxed stations, or mobile service stations.

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