Sec. 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:
------------------------------------------------------------------------
Coordinates
City Channels -------------------------
Latitude Longitude
------------------------------------------------------------------------
Boston, MA.......................... 14, 16 42 deg.21'2
4' 071 deg.03'
24'
Chicago, IL......................... 14, 15 41 deg.52'2
8' 087 deg.38'
22'
Cleveland, OH....................... 14, 15 41 deg.29'5
1' 081 deg.41'
50'
Dallas, TX.......................... 16 32 deg.47'0
9' 096 deg.47'
37'
Detroit, MI......................... 15, 16 42 deg.19'4
8' 083 deg.02'
57'
Houston, TX......................... 17 29 deg.45'2
6' 095 deg.21'
37'
Los Angeles, CA..................... 14, 20 34 deg.03'1
5' 118 deg.14'
28'
Miami, FL........................... 14 25 deg.46'3
7' 080 deg.11'
32'
New York, NY........................ 14, 15 40 deg.45'0
6' 073 deg.59'
39'
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Philadelphia, PA.................... 19, 20 39 deg.56'5
8' 075 deg.09'
21'
Pittsburgh, PA...................... 14, 18 40 deg.26'1
9' 080 deg.00'
00'
San Francisco, CA................... 16, 17 37 deg.46'3
9' 122 deg.24'
40'
Washington, DC...................... 17, 18 38 deg.53'5
1' 077 deg.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.
------------------------------------------------------------------------
Coordinates
City Channel -------------------------
Latitude Longitude
------------------------------------------------------------------------
San Diego, CA........................ 15 32 deg.41'4
8' 116 deg.56'
10'
Waterbury, CT........................ 20 41 deg.31'0
2' 073 deg.01'
00'
Washington, DC....................... 14 38 deg.57'1
7' 077 deg.00'
17'
Washington, DC....................... 20 38 deg.57'4
9' 077 deg.06'
18'
Champaign, IL........................ 15 40 deg.04'1
1' 087 deg.54'
45'
Jacksonville, IL..................... 14 39 deg.45'5
2' 090 deg.30'
29'
Ft. Wayne, IN........................ 15 41 deg.05'3
5' 085 deg.10'
42'
South Bend, IN....................... 16 41 deg.36'2
0' 086 deg.12'
44'
Salisbury, MD........................ 16 38 deg.24'1
5' 075 deg.34'
45'
Mt. Pleasant, MI..................... 14 43 deg.34'2
4' 084 deg.46'
21'
Hanover, NH.......................... 15 43 deg.42'3
0' 072 deg.09'
16'
Canton, OH........................... 17 40 deg.51'0
4' 081 deg.16'
37'
Cleveland, OH........................ 19 41 deg.21'1
9' 081 deg.44'
24'
Oxford, OH........................... 14 39 deg.30'2
6' 084 deg.44'
09'
Zanesville, OH....................... 18 39 deg.55'4
2' 081 deg.59'
06'
Elmira-Corning, NY................... 18 42 deg.06'2
0' 076 deg.52'
17'
Harrisburg, PA....................... 21 40 deg.20'4
4' 076 deg.52'
09'
Johnstown, PA........................ 19 40 deg.19'4
7' 078 deg.53'
45'
Lancaster, PA........................ 15 40 deg.15'4
5' 076 deg.27'
49'
Philadelphia, PA..................... 17 40 deg.02'3
0' 075 deg.14'
24'
Pittsburgh, PA....................... 16 40 deg.26'4
6' 079 deg.57'
51'
Scranton, PA......................... 16 41 deg.10'5
8' 075 deg.52'
21'
Parkersburg, WV...................... 15 39 deg.20'5
0' 081 deg.33'
56'
Madison, WI.......................... 15 43 deg.03'0
1' 089 deg.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 Sec. 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 deg.00' W.L.; east of 98 deg.30' W.L.;
and south of a line extending due west from 30 deg.30' N.L., 92 deg.00'
W.L. to 30 deg.30' N.L., 96 deg.00' W.L.; and then due southwest to
28 deg.00' N.L., 98 deg.30' W.L.
(2) On Channel 16: west of 86 deg.40'W.L.; east of 96 deg.30'W.L.;
and south of a line extending due west from 31 deg.00'N.L.,
86 deg.40'W.L. to 31 deg.00'N.L., 95 deg.00'W.L. and then due southwest
to 29 deg.30'N.L., 96 deg.30'W.L.
(3) On Channel 17: west of 86 deg.30'W.L.; east of 96 deg.00'W.L.;
and south of a line extending due west from 31 deg.00'N.L.,
86 deg.30'W.L. to 31 deg.30'N.L., 94 deg.00'W.L. and then due southwest
to 29 deg.30'N.L., 96 deg.00'W.L.
(4) On Channel 18: west of 87 deg.00'W.L.; east of 95 deg.00'W.L.;
and south of 31 deg.'N.L.
[47 00 FR 21499 , May 18, 1982, as amended at 50 FR 12027 , Mar. 27, 1985; 50 FR 33942 , Aug. 22, 1985]
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