§  27.4   Terms and definitions.

   Advanced wireless service (AWS). A radiocommunication service licensed
   pursuant to this part for the frequency bands specified in §  27.5(h).

   Affiliate. This term shall have the same meaning as that for
   “affiliate” in part 1, §  1.2110(b)(5) of this chapter.

   Assigned frequency. The center of the frequency band assigned to a
   station.

   Attended operation. Operation of a station by a designated person on
   duty at the place where the transmitting apparatus is located with the
   transmitter in the person's plain view.

   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.

   Booster service area. A geographic area to be designated by an
   applicant for a booster station, within which the booster station shall
   be entitled to protection against interference as set forth in this
   part. The booster service area must be specified by the applicant so as
   not to overlap the booster service area of any other booster authorized
   to or proposed by the applicant. However, a booster station may provide
   service to receive sites outside of its booster service area, at the
   licensee's risk of interference. The booster station must be capable of
   providing substantial service within the designated booster service
   area.

   Broadband Radio Service (BRS). A radio service using certain
   frequencies in the 2150-2162 and 2496-2690 MHz bands which can be used
   to provide fixed and mobile services, except for aeronautical services.

   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).

   Commercial EBS licensee. A licensee authorized to operate on EBS
   channels pursuant to the provisions of §  27.1201(c) contained in the
   edition of 47 CFR parts 20 to 39, revised as of October 1, 2005, or
   § §  74.990 through 74.992 contained in the edition of 47 CFR parts 70 to
   79, revised as of October 1, 2004, of this chapter, and that does not
   meet the eligibility requirements of §  27.1201(a).

   Documented complaint. A complaint that a party is suffering from
   non-consensual interference. A documented complaint must contain a
   certification that the complainant has contacted the operator of the
   allegedly offending facility and tried to resolve the situation prior
   to filing. The complaint must then specify the nature of the
   interference, whether the interference is constant or intermittent,
   when the interference began and the site(s) most likely to be causing
   the interference. The complaint should be accompanied by a videotape or
   other evidence showing the effects of the interference. The complaint
   must contain a motion for a temporary order to have the interfering
   station cease transmitting. The complaint must be filed with the
   Secretary's office and served on the allegedly offending party.

   Educational Broadband Service (EBS). A fixed or mobile service, the
   licensees of which are educational institutions or non-profit
   educational organizations, and intended primarily for video, data, or
   voice transmissions of instructional, cultural, and other types of
   educational material to one or more receiving locations.

   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.

   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.

   Lower Band Segment (LBS). Segment of the BRS/EBS band consisting of
   channels in the frequencies 2496-2572 MHz.

   Middle Band Segment (MBS). Segment of the BRS/EBS band consisting of
   channels in the frequencies 2572-2614 MHz.

   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)

   Point-to-point Broadband station. A Broadband station that transmits a
   highly directional signal from a fixed transmitter location to a fixed
   receive location.

   Portable device . Transmitters designed to be used within 20
   centimeters of the body of the user.

   Public Safety Broadband Licensee. The licensee of the Public Safety
   Broadband License in the 763-768 MHz and 793-798 MHz bands.

   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.

   Remote control. Operation of a station by a designated person at a
   control position from which the transmitter is not visible but where
   suitable control and telemetering circuits are provided which allow the
   performance of the essential functions that could be performed at the
   transmitter.

   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.

   Sectorization. The use of an antenna system at any broadband station,
   booster station and/or response station hub that is capable of
   simultaneously transmitting multiple signals over the same frequencies
   to different portions of the service area and/or simultaneously
   receiving multiple signals over the same frequencies from different
   portions of the service area.

   Studio to transmitter link (STL). A directional path used to transmit a
   signal from a station's studio to its transmitter.

   Temporary fixed broadband station. A broadband station used for the
   transmission of material from temporary unspecified points to a
   broadband station.

   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.

   Unattended operation. Operation of a station by automatic means whereby
   the transmitter is turned on and off and performs its functions without
   attention by a designated person.

   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.

   Upper 700 MHz D Block license. The Upper 700 MHz D Block license is the
   nationwide license associated with the 758-763 MHz and 788-793 MHz
   bands.

   Upper Band Segment (UBS). Segment of the BRS/EBS band consisting of
   channels in the frequencies 2614-2690 MHz

   Wireless communications service. A radiocommunication service licensed
   pursuant to this part for the frequency bands specified in §  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;  69 FR 72031 , Dec. 10, 2004;  71 FR 35189 , June 19,
   2006;  72 FR 27709 , May 16, 2007;  72 FR 48843 , Aug. 24, 2007;  77 FR 62462 , Oct. 15, 2012]

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