Sec.  22.625   Transmitter locations.

   

   Link to an amendment published at  70 FR 19309 , Apr. 13, 2005.

   This section governs where point-to-multipoint transmitters on the
   channels listed in Sec. 22.621 may be located.

   (a) 928-960 MHz. In this frequency range, the required minimum
   distance separation between co-channel fixed transmitters is 113
   kilometers (70 miles). However, this requirement may be waived if the
   applicant submits an engineering analysis that shows that no
   interference would be caused to either system. In such a case, a
   developmental authorization may be issued (see Sec. 22.415). If no
   interference is experienced during the term of the developmental
   authorization, the licensee may apply for a regular authorization.

   (b) 470-512 MHz. The purpose of the rule in paragraph (b)(1) of this
   section is to define the areas in which the 470-512 MHz channels are
   allocated for public mobile use. The purpose of the rules in
   paragraphs (b)(2) and (b)(3) of this section is to reduce the
   likelihood that interference to television reception from public
   mobile operations on these channels will occur.

   (1) Control transmitter locations. Control transmitter locations must
   be within 80 kilometers (50 miles) of the designated locations in this
   paragraph.


------------------------------------------------------------------------
                 Urban area                  N. latitude   W. longitude
------------------------------------------------------------------------
Boston, MA.................................  42°21[m  71°03[min]
                                             in]24.4[sec       22.2[sec]
                                                       ]
Chicago, IL................................  41°52[m  87°38[min]
                                             in]28.1[sec       22.2[sec]
                                                       ]
Cleveland, OH..............................  41°29[m  81°41[min]
                                             in]51.2[sec       49.5[sec]
                                                       ]
Dallas, TX.................................  32°47[m  96°47[min]
                                             in]09.5[sec       38.0[sec]
                                                       ]
Detroit, MI................................  42°19[m  83°02[min]
                                             in]48.1[sec       56.7[sec]
                                                       ]
Houston, TX................................  29°45[m  95°21[min]
                                             in]26.8[sec       37.8[sec]
                                                       ]
Los Angeles, CA............................  34°03[m  18°14[min]
                                             in]15.0[sec       31.3[sec]
                                                       ]
Miami, FL..................................  25°46[m  80°11[min]
                                             in]38.6[sec       31.2[sec]
                                                       ]
New York, NY...............................  40°45[m  73°59[min]
                                             in]6.4[sec]       37.5[sec]
Philadelphia, PA...........................  39°56[m  75°09[min]
                                             in]58.4[sec       19.6[sec]
                                                       ]
Pittsburgh, PA.............................  40°26[m  79°59[min]
                                             in]19.2[sec       59.2[sec]
                                                       ]
San Francisco-Oakland, CA..................  37°46[m  122°24[min
                                             in]38.7[sec      ]43.9[sec]
                                                       ]
Washington, DC.............................  38°53[m  77°00[min]
                                             in]51.4[sec       31.9[sec]
                                                       ]
------------------------------------------------------------------------
Note: Coordinates are referenced to North American Datum 1983 (NAD 83).

   (2) Protection from intermodulation interference. Control transmitter
   locations must be at least 1.6 kilometers (1 mile) from the main
   transmitter locations of all TV stations transmitting on TV channels
   separated by 2, 3, 4, 5, 7, or 8 TV channels from the TV channel
   containing the frequencies on which the control station will transmit.
   This requirement is intended to reduce the likelihood of
   intermodulation interference.

   (3) Co-channel protection from control transmitters with high
   antennas. This paragraph applies only to control transmitters that
   utilize an antenna height of more than 152 meters (500 feet) above
   average terrain. The distance between the location of such a control
   transmitter and the applicable protected TV station location specified
   in this paragraph must equal or exceed the sum of the distance from
   the control transmitter location to the radio horizon in the direction
   of the specified location and 89 kilometers (55 miles--representing
   the distance from the main transmitter location of the TV station to
   its Grade B contour in the direction of the control transmitter). The
   protected TV station locations in this paragraph are the locations of
   record as of September 1974, and these do not change even though the
   TV stations may have been subsequently relocated.

   (i) The protected TV station locations are as follows:


------------------------------------------------------------------------
  Control transmitter frequency range     Protected TV station location
------------------------------------------------------------------------
470-476 MHz............................  Washington, DC
                                          38°57[min]17[sec]
                                          77°00[min]17[sec]
476-482 MHz............................  Lancaster, PA
                                          40°15[min]45[sec]
                                          76°27[min]49[sec]
------------------------------------------------------------------------

   (ii) The distance to the radio horizon is calculated using the
   following formula:
   [MATH:  :MATH]

   where

   d is the distance to the radio horizon in kilometers

   h is the height of the antenna center of radiation above ground level
   in meters

   [ 59 FR 59507 , Nov. 17, 1994, as amended at  63 FR 68946 , Dec. 14, 1998]