Sec.  27.4   Terms and definitions.

   Link to an amendment published at  72 FR 48843 , Aug. 24, 2007.

   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.

   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  Sec. 27.1201(c) contained in the edition of 47 CFR
   parts 20 to 39, revised as of October 1, 2005, or  Sec.  Sec. 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  Sec. 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.

   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 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  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;  69 FR 72031 , Dec. 10, 2004;  71 FR 35189 , June 19, 2006;  72 FR 27709 ,
   May 16, 2007]