§ 74.709   Land mobile station protection.

   (a) Stations in the Land Mobile Radio Service, using the following
   channels in the indicated cities will be protected from interference
   caused by low power TV or TV translator stations, and low power TV and
   TV translator stations must accept any interference from stations in
   the land mobile service operating on the following channels:
         City         Channels      Coordinates
                                Latitude   Longitude
   Boston, MA            14, 16 42°21′24″  071°03′24″
   Chicago, IL           14, 15 41°52′28″  087°38′22″
   Cleveland, OH         14, 15 41°29′51″  081°41′50″
   Dallas, TX                16 32°47′09″  096°47′37″
   Detroit, MI           15, 16 42°19′48″  083°02′57″
   Houston, TX               17 29°45′26″  095°21′37″
   Los Angeles, CA   14, 16, 20 34°03′15″ 118°18′28″
   Miami, FL                 14 25°46′37″  080°11′32″
   New York, NY      14, 15, 16 40°45′06″  073°59′39″
   Philadelphia, PA      19, 20 39°56′58″  075°09′21″
   Pittsburgh, PA        14, 18 40°26′19″  080°00′00″
   San Francisco, CA     16, 17 37°46′39″  122°24′40″
   Washington, DC        17, 18 38°53′51″  077°00′33″

   (b) The protected contours for the land mobile radio service are 130
   kilometers from the above coordinates, except where limited by the
   following:

   (1) If the land mobile channel is the same as the channel in the
   following list, the land mobile protected contour excludes the area
   within 145 kilometers of the corresponding coordinates from list below.
   Except if the land mobile channel is 15 in New York or Cleveland or 16
   in Detroit, the land mobile protected contour excludes the area within
   95 kilometers of the corresponding coordinates from the list below.

   (2) If the land mobile channel is one channel above or below the
   channel in the following list, the land mobile protected contour
   excludes the area within 95 kilometers of the corresponding coordinates
   from the list below.
          City        Channel     Coordinates
                              Latitude  Longitude
   San Diego, CA           15 32°41′48″ 116°56′10″
   Waterbury, CT           20 41°31′02″ 073°01′00″
   Washington, DC          14 38°57′17″ 077°00′17″
   Washington, DC          20 38°57′49″ 077°06′18″
   Champaign, IL           15 40°04′11″ 087°54′45″
   Jacksonville, IL        14 39°45′52″ 090°30′29″
   Ft. Wayne, IN           15 41°05′35″ 085°10′42″
   South Bend, IN          16 41°36′20″ 086°12′44″
   Salisbury, MD           16 38°24′15″ 075°34′45″
   Mt. Pleasant, MI        14 43°34′24″ 084°46′21″
   Hanover, NH             15 43°42′30″ 072°09′16″
   Canton, OH              17 40°51′04″ 081°16′37″
   Cleveland, OH           19 41°21′19″ 081°44′24″
   Oxford, OH              14 39°30′26″ 084°44′09″
   Zanesville, OH          18 39°55′42″ 081°59′06″
   Elmira-Corning, NY      18 42°06′20″ 076°52′17″
   Harrisburg, PA          21 40°20′44″ 076°52′09″
   Johnstown, PA           19 40°19′47″ 078°53′45″
   Lancaster, PA           15 40°15′45″ 076°27′49″
   Philadelphia, PA        17 40°02′30″ 075°14′24″
   Pittsburgh, PA          16 40°26′46″ 079°57′51″
   Scranton, PA            16 41°10′58″ 075°52′21″
   Parkersburg, WV         15 39°20′50″ 081°33′56″
   Madison, WI             15 43°03′01″ 089°29′15″

   (c) A low power TV or TV translator station application will not be
   accepted if it specifies a site that is within the protected contour of
   a co-channel or first adjacent channel land mobile assignment.

   (d) The low power TV or TV translator station field strength is
   calculated from the proposed effective radiated power (ERP) and the
   antenna height above average terrain (HAAT) in pertinent directions.

   (1) The field strength is calculated using Figure 10c of § 73.699 (F(50,
   10) charts) of part 73 of this chapter.

   (2) A low power TV or TV translator station application will not be
   accepted if it specifies the same channel as one of the land mobile
   assignments and its field strength at the land mobile protected contour
   exceeds 52 dBu.

   (3) A low power TV or TV translator station application will not be
   accepted if it specifies a channel that is one channel above or below
   one of the land mobile assignments and its field strength at the land
   mobile protected contour exceeds 76 dBu.

   (e) To protect stations in the Offshore Radio Service, a low power TV
   or TV translator station construction permit application will not be
   accepted if it specifies operation on channels 15, 16, 17 or 18 in the
   following areas. West Longitude and North Latitude are abbreviated as
   W.L. and N.L. respectively.

   (1) On Channel 15: west of 92°00′ W.L.; east of 98°30′ W.L.; and south
   of a line extending due west from 30°30′ N.L., 92°00′ W.L. to 30°30′
   N.L., 96°00′ W.L.; and then due southwest to 28°00′ N.L., 98°30′ W.L.

   (2) On Channel 16: west of 86°40′ W.L.; east of 96°30′ W.L.; and south
   of a line extending due west from 31°00′ N.L., 86°40′ W.L. to 31°00′
   N.L., 95°00′ W.L. and then due southwest to 29°30′ N.L., 96°30′ W.L.

   (3) On Channel 17: west of 86°30′ W.L.; east of 96°00′ W.L.; and south
   of a line extending due west from 31°00′ N.L., 86°30′ W.L. to 31°30′
   N.L., 94°00′ W.L. and then due southwest to 29°30′ N.L., 96°00′ W.L.

   (4) On Channel 18: west of 87°00′ W.L.; east of 95°00′ W.L.; and south
   of 31°00′ N.L.

   [ 47 FR 21499 , May 18, 1982, as amended at  50 FR 12027 , Mar. 27, 1985;
    50 FR 33942 , Aug. 22, 1985;  69 FR 31906 , June 8, 2004]

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