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470 Subpart A—Terminology

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470 Subpart A—Terminology § 2.1 47 CFR Ch. I (10–1–05 Edition) Subpart M—Advance Approval of (c) The following terms and defini- Subscription TV Transmission Systems tions are issued: Accepted Interference. 1 Interference at ADVANCE APPROVAL PROCEDURE a higher level than defined as permis- 2.1400 Application for advance approval sible interference and which has been under part 73. agreed upon between two or more ad- ministrations without prejudice to Subpart N—FCC Procedure for Testing other administrations. (RR) Class A, B and S Emergency Position Indicating Radiobeacons (EPIRBs) Active Satellite. A satellite carrying a station intended to transmit or re- GENERAL transmit radiocommunication signals. 2.1501 Introduction. (RR) 2.1503 Test environment. Active Sensor. A measuring instru- 2.1505 Test instrumentation and equipment. ment in the earth exploration-satellite service or in the space research service ENVIRONMENTAL AND OPERATIONAL TEST by means of which information is ob- PROCEDURES tained by transmission and reception 2.1507 Test frequencies. of radio waves. (RR) 2.1509 Environmental and duration tests. Adaptive System. A 2.1511 Measurements of radiated emissions. 2.1513 Measurements of modulation charac- radiocommunication system which teristics. varies its radio characteristics accord- 2.1515 Spectral measurements. ing to channel quality. (RR) Administration. Any governmental de- DATA RECORDING/REPORTING REQUIREMENTS partment or service responsible for dis- 2.1517 Data recording/reporting require- charging the obligations undertaken in ments. the Constitution of the International FIGURE 1 TO SUBPART N—MEASUREMENT SITE Telecommunication Union, in the Con- FIGURE 2 TO SUBPART N—TYPICAL AUDIO vention of the International Tele- WAVEFORM communication Union and in the Ad- FIGURE 3 TO SUBPART N—EXAMPLE OF IDEAL ministrative Regulations. (CS) EPIRB SPECTRUM FIGURE 4 TO SUBPART N—EXAMPLE OF EPIRB Administration. Any governmental de- CARRIER COMPONENT partment or service responsible for dis- charging the obligations undertaken in AUTHORITY: 47 U.S.C. 154, 302a, 303, and 336, unless otherwise noted. the Convention of the International Telecommunication Union and the SOURCE: 28 FR 12465, Nov. 22, 1963, unless Regulations. (CONV) otherwise noted. Aeronautical Earth Station. An Earth EDITORIAL NOTE: Nomenclature changes to station in the fixed-satellite service, part 2 appear at 63 FR 54077, Oct. 8, 1998. or, in some cases, in the aeronautical mobile-satellite service, located at a Subpart A—Terminology specified fixed point on land to provide a feeder link for the aeronautical mo- § 2.1 Terms and definitions. bile-satellite service. (RR) (a) Where a term or definition ap- Aeronautical Fixed Service. A radio- pears in this part of the Commission’s communication service between speci- Rules, it shall be the definitive term or fied fixed points provided primarily for definition and shall prevail throughout the safety of air navigation and for the the Commission’s Rules. regular, efficient and economical oper- (b) The source of each definition is ation of air transport. (RR) indicated as follows: Aeronautical Fixed Station. A station CS—Annex to the Constitution of the in the aeronautical fixed service. (RR) International Telecommunication Aeronautical Mobile Off-Route (OR) Union (ITU) Service. An aeronautical mobile service CV—Annex to the Convention of the ITU 1 The terms permissible interference and ac- FCC—Federal Communications Com- cepted interference are used in the coordina- mission tion of frequency assignments between ad- RR—ITU Radio Regulations ministrations. 470 VerDate Aug<31>2005 06:12 Nov 01, 2005 Jkt 205195 PO 00000 Frm 00480 Fmt 8010 Sfmt 8010 Y:\SGML\205195.XXX 205195 Federal Communications Commission § 2.1 intended for communications, includ- than a survival craft station, located ing those relating to flight coordina- on board an aircraft. (RR) tion, primarily outside national or Allocation (of a frequency band). Entry international civil air routes. (RR) in the Table of Frequency Allocations Aeronautical Mobile Route (R) Service. of a given frequency band for the pur- An aeronautical mobile service re- pose of its use by one or more terres- served for communications relating to trial or space radiocommunication safety and regularity of flight, pri- services or the radio astronomy service marily along national or international under specified conditions. This term civil air routes. (RR) shall also be applied to the frequency Aeronautical Mobile-Satellite Off-Route band concerned. (RR) (OR) Service. An aeronautical mobile- Allotment (of a radio frequency or radio satellite service intended for commu- frequency channel). Entry of a des- nications, including those relating to ignated frequency channel in an agreed flight coordination, primarily outside plan, adopted by a competent con- national and international civil air ference, for use by one or more admin- routes. (RR) istrations for a terrestrial or space Aeronautical Mobile-Satellite Route (R) radiocommunication service in one or Service. An aeronautical mobile-sat- more identified countries or geo- ellite service reserved for communica- graphical area and under specified con- tions relating to safety and regularity ditions. (RR) of flights, primarily along national or Altitude of the Apogee or Perigee. The international civil air routes. (RR) altitude of the apogee or perigee above Aeronautical Mobile-Satellite Service. A a specified reference surface serving to mobile-satellite service in which mo- represent the surface of the Earth. bile earth stations are located on board (RR) aircraft; survival craft stations and Amateur-Satellite Service. A radio- emergency position-indicating radio- communication service using space beacon stations may also participate in stations on earth satellites for the this service. (RR) same purposes as those of the amateur Aeronautical Mobile Service. A mobile service. (RR) service between aeronautical stations Amateur Service. A radio- and aircraft stations, or between air- communication service for the purpose craft stations, in which survival craft of self-training, intercommunication stations may participate; emergency and technical investigations carried position-indicating radiobeacon sta- out by amateurs, that is, by duly au- tions may also participate in this serv- thorized persons interested in radio ice on designated distress and emer- technique solely with a personal aim gency frequencies. (RR) and without pecuniary interest. (RR) Aeronautical Radionavigation-Satellite Amateur Station. A station in the Service. A radionavigation-satellite amateur service. (RR) service in which earth stations are lo- Assigned Frequency. The centre of the cated on board aircraft. (RR) frequency band assigned to a station. Aeronautical Radionavigation Service. (RR) A radio-navigation service intended for Assigned Frequency Band. The fre- the benefit and for the safe operation quency band within which the emission of aircraft. (RR) of a station is authorized; the width of Aeronautical Station. A land station in the band equals the necessary band- the aeronautical mobile service. width plus twice the absolute value of the frequency tolerance. Where space NOTE: In certain instances, an aeronautical stations are concerned, the assigned station may be located, for example, on frequency band includes twice the max- board ship or on a platform at sea. (RR) imum Doppler shift that may occur in Aircraft Earth Station. A mobile earth relation to any point of the Earth’s station in the aeronautical mobile-sat- surface. (RR) ellite service located on board an air- Assignment (of a radio frequency or craft. (RR) radio frequency channel). Authorization Aircraft Station. A mobile station in given by an administration for a radio the aeronautical mobile service, other station to use a radio frequency or 471 VerDate Aug<31>2005 06:12 Nov 01, 2005 Jkt 205195 PO 00000 Frm 00481 Fmt 8010 Sfmt 8010 Y:\SGML\205195.XXX 205195 § 2.1 47 CFR Ch. I (10–1–05 Edition) radio frequency channel under speci- Community Reception (in the broad- fied conditions. (RR) casting-satellite service). The reception Base Earth Station. An earth station of emissions from a space station in in the fixed-satellite service or, in the broadcasting-satellite service by some cases, in the land mobile-satellite receiving equipment, which in some service, located at a specified fixed cases may be complex and have anten- point or within a specified area on land nae larger than those for individual re- to provide a feeder link for the land ception, and intended for use: (1) by a mobile-satellite service. (RR) group of the general public at one loca- Base Station. A land station in the tion; or (2) through a distribution sys- land mobile service. (RR) tem covering a limited area. (RR) Broadcasting-Satellite Service. A radio- Coordinated Universal Time (UTC). communication service in which sig- Time scale, based on the second (SI), as nals transmitted or retransmitted by defined in Recommendation ITU–R space stations are intended for direct TF.460–6. reception by the general public. NOTE: For most practical purposes associ- NOTE: In the broadcasting-satellite service, ated with the ITU Radio Regulations, UTC is the term direct reception shall encompass equivalent to mean solar time at the prime both individual reception and community re- meridian (0° longitude), formerly expressed ception. (RR) in GMT. (RR) Broadcasting Service. A Coordination Area. When determining radiocommunication service in which the need
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