§ 15.703   Definitions.

   (a) Available channel. A six-megahertz television channel, as specified in
   § 73.603 of this chapter, which is not being used by an authorized service at
   or near the same geographic location as the TVBD and is acceptable for use
   by an unlicensed device under the provisions of this subpart.

   (b) Contact verification signal. An encoded signal broadcast by a fixed or
   Mode II device for reception by Mode I devices to which the fixed or Mode II
   device has provided a list of available channels for operation. Such signal
   is for the purpose of establishing that the Mode I device is still within
   the  reception  range  of  the fixed or Mode II device for purposes of
   validating the list of available channels used by the Mode I device and
   shall be encoded to ensure that the signal originates from the device that
   provided the list of available channels. A Mode I device may respond only to
   a contact verification signal from the fixed or Mode II device that provided
   the list of available channels on which it operates. A fixed or Mode II
   device shall provide the information needed by a Mode I device to decode the
   contact  verification  signal at the same time it provides the list of
   available channels.

   (c) Fixed device. A TVBD that transmits and/or receives radiocommunication
   signals at a specified fixed location. A fixed TVBD may select channels for
   operation itself from a list of available channels provided by a TV bands
   database, initiate and operate a network by sending enabling signals to one
   or  more fixed TVBDs and/or personal/portable TVBDs. Fixed devices may
   provide to a Mode I personal/portable device a list of available channels on
   which the Mode I device may operate under the rules, including available
   channels above 512 MHz (above TV channel 20) on which the fixed TVBD also
   may operate and a supplemental list of available channels above 512 MHz
   (above TV channel 20) that are adjacent to occupied TV channels on which the
   Mode I device, but not the fixed device, may operate.

   (d) Geo-location capability. The capability of a TVBD to determine its
   geographic  coordinates  within  the  level  of  accuracy specified in
   § 15.711(b)(1), i.e. 50 meters. This capability is used with a TV bands
   database approved by the FCC to determine the availability of TV channels at
   a TVBD's location.

   (e) Mode I personal/portable device. A personal/portable TVBD that does not
   use an internal geo-location capability and access to a TV bands database to
   obtain a list of available channels. A Mode I device must obtain a list of
   available channels on which it may operate from either a fixed TVBD or Mode
   II personal/portable TVBD. A Mode I device may not initiate a network of
   fixed and/or personal/portable TVBDs nor may it provide a list of available
   channels to another Mode I device for operation by such device.

   (f) Mode II personal/portable device. A personal/portable TVBD that uses an
   internal geo-location capability and access to a TV bands database, either
   through  a  direct  connection  to the Internet or through an indirect
   connection to the Internet by way of fixed TVBD or another Mode II TVBD, to
   obtain a list of available channels. A Mode II device may select a channel
   itself and initiate and operate as part of a network of TVBDs, transmitting
   to and receiving from one or more fixed TVBDs or personal/portable TVBDs. A
   Mode II personal/portable device may provide its list of available channels
   to a Mode I personal/portable device for operation on by the Mode I device.

   (g) Network initiation. The process by which a fixed or Mode II TVBD sends
   control signals to one or more fixed TVBDs or personal/portable TVBDs and
   allows them to begin communications.

   (h) Operating channel. An available channel used by a TVBD for transmission
   and/or reception.

   (i)  Personal/portable  device.  A TVBD that transmits and/or receives
   radiocommunication  signals  at unspecified locations that may change.
   Personal/portable devices may only transmit on available channels in the
   frequency bands 512-608 MHz (TV channels 21-36) and 614-698 MHz (TV channels
   38-51).

   (j) Receive site. The location where the signal of a full service television
   station is received for rebroadcast by a television translator or low power
   TV  station,  including a Class A TV station, or for distribution by a
   Multiple Video Program Distributor (MVPD) as defined in 47 U.S.C. 602(13).

   (k) Sensing only device. A personal/portable TVBD that uses spectrum sensing
   to determine a list of available channels. Sensing only devices may transmit
   on any available channels in the frequency bands 512-608 MHz (TV channels
   21-36) and 614-698 MHz (TV channels 38-51).

   (l) Spectrum sensing. A process whereby a TVBD monitors a television channel
   to detect whether the channel is occupied by a radio signal or signals from
   authorized services.

   (m) Television band device (TVBD). Intentional radiators that operate on an
   unlicensed basis on available channels in the broadcast television frequency
   bands at 54-60 MHz (TV channel 2), 76-88 MHz (TV channels 5 and 6), 174-216
   MHz (TV channels 7-13), 470-608 MHz (TV channels 14-36) and 614-698 MHz (TV
   channels 38-51).

   (n) TV bands database. A database system that maintains records of all
   authorized services in the TV frequency bands, is capable of determining the
   available channels as a specific geographic location and provides lists of
   available channels to TVBDs that have been certified under the Commission's
   equipment authorization procedures. TV bands databases that provide lists of
   available channels to TVBDs must receive approval by the Commission.

   [ 75 FR 75835 , Dec. 6, 2010]

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