§ 1.30001   Definitions.

   For purposes of this subpart:

   (a) Wavelength at the AM frequency. In this subpart, critical distances from
   an  AM  station  are  described  in terms of the AM wavelength. The AM
   wavelength, expressed in meters, is computed as follows:

   (300 meters)/(AM frequency in megahertz) = AM wavelength in meters.

   For example, at the AM frequency of 1000 kHz, or 1 MHz, the wavelength is
   (300/1 MHz) = 300 meters.

   (b) Electrical degrees at the AM frequency. This term describes the height
   of a proposed tower as a function of the frequency of a nearby AM station.
   To  compute tower height in electrical degrees, first determine the AM
   wavelength in meters as described in paragraph (a) of this section. Tower
   height  in electrical degrees is computed as follows: (Tower height in
   meters)/(AM wavelength in meters) × 360 degrees = Tower height in electrical
   degrees. For example, if the AM frequency is 1000 kHz, then the wavelength
   is 300 meters, per paragraph (a) of this section. A nearby tower 75 meters
   tall is therefore [75/300] × 360 = 90 electrical degrees tall at the AM
   frequency.

   (c)  Proponent. The term proponent refers in this section to the party
   proposing tower construction or significant modification of an existing
   tower or proposing installation of an antenna on an AM tower.

   (d) Distance from the AM station. The distance shall be calculated from the
   tower coordinates in the case of a nondirectional AM station, or from the
   array center coordinates given in CDBS or any successor database for a
   directional AM station.

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