[Code of Federal Regulations] [Title 47, Volume 2] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 47CFR27.4] [Page 372-373] TITLE 47--TELECOMMUNICATION CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) PART 27_MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES--Table of Contents Subpart A_General Information Sec. 27.4 Terms and definitions. Advanced wireless service (AWS). A radiocommunication service licensed pursuant to this part for the frequency bands specified in Sec. 27.5(h). Affiliate. This term shall have the same meaning as that for ``affiliate'' in part 1, Sec. 1.2110(b)(5) of this chapter. Assigned frequency. The center of the frequency band assigned to a station. Authorized bandwidth. The maximum width of the band of frequencies permitted to be used by a station. This is normally considered to be the necessary or occupied bandwidth, whichever is greater. Average terrain. The average elevation of terrain between 3 and 16 kilometers from the antenna site. Base station. A land station in the land mobile service. Broadcast services. This term shall have the same meaning as that for ``broadcasting'' in section 3(6) of the Communications Act of 1934, i.e., ``the dissemination of radio communications intended to be received by the public, directly or by the intermediary of relay stations.'' 47 U.S.C. 153(6). Effective Radiated Power (ERP) (in a given direction). The product of the power supplied to the antenna and its gain relative to a half- wave dipole in a given direction. Equivalent Isotropically Radiated Power (EIRP). The product of the power supplied to the antenna and the antenna gain in a given direction relative to an isotropic antenna. Fixed service. A radio communication service between specified fixed points. Fixed station. A station in the fixed service. [[Page 373]] Guard band manager. The term Guard band manager refers to a commercial licensee in the 746-747 MHz, 762-764 MHz, 776-777 MHz, and 792-794 MHz bands that functions solely as a spectrum broker by subdividing its licensed spectrum and making it available to system operators or directly to end users for fixed or mobile communications consistent with Commission Rules. A Guard band manager is directly responsible for any interference or misuse of its licensed frequency arising from its use by such non-licensed entities. Land mobile service. A mobile service between base stations and land mobile stations, or between land mobile stations. Land mobile station. A mobile station in the land mobile service capable of surface movement within the geographic limits of a country or continent. Land station. A station in the mobile service not intended to be used while in motion. Mobile service. A radio communication service between mobile and land stations, or between mobile stations. Mobile station. A station in the mobile service intended to be used while in motion or during halts at unspecified points. National Geodetic Reference System (NGRS). The name given to all geodetic control data contained in the National Geodetic Survey (NGS) data base. (Source: National Geodetic Survey, U.S. Department of Commerce) Portable device. Transmitters designed to be used within 20 centimeters of the body of the user. Radiodetermination. The determination of the position, velocity and/ or other characteristics of an object, or the obtaining of information relating to these parameters, by means of the propagation properties of radio waves. Radiolocation. Radiodetermination used for purposes other than those of radionavigation. Radiolocation land station. A station in the radiolocation service not intended to be used while in motion. Radiolocation mobile station. A station intended to be used while in motion or during halts at unspecified points. Radionavigation. Radiodetermination used for the purpose of navigation, including obstruction warning. Satellite Digital Audio Radio Service (satellite DARS). A radiocommunication service in which compact disc quality programming is digitally transmitted by one or more space stations. Time division multiple access (TDMA). A multiple access technique whereby users share a transmission medium by being assigned and using (one-at-a-time) for a limited number of time division mulitplexed channels; implies that several transmitters use one channel for sending several bit streams. Time division multiplexing (TDM). A multiplexing technique whereby two or more channels are derived from a transmission medium by dividing access to the medium into sequential intervals. Each channel has access to the entire bandwidth of the medium during its interval. This implies that one transmitter uses one channel to send several bit streams of information. Universal Licensing System. The Universal Licensing System (ULS) is the consolidated database, application filing system, and processing system for all Wireless Radio Services. ULS supports electronic filing of all applications and related documents by applicants and licensees in the Wireless Radio Services, and provides public access to licensing information. Wireless communications service. A radiocommunication service licensed pursuant to this part for the frequency bands specified in Sec. 27.5. [62 FR 9658, Mar. 3, 1997, as amended at 62 FR 16497, Apr. 7, 1997; 63 FR 68954, Dec. 14, 1998; 65 FR 3145, Jan. 20, 2000; 65 FR 17602, Apr. 4, 2000; 67 FR 41854, June 20, 2002; 68 FR 66286, Nov. 25, 2003; 69 FR 5714, Feb. 6, 2004]