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 Title 47 - Telecommunication
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 470-512 Mhz Trunked Mobile Operation

  § 22.659 - Effective radiated power limits.

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  • § 22.659 Effective radiated power limits.

    The purpose of the rules in this section, which limit effective radiated power (ERP), is to reduce the likelihood that interference to television reception from public mobile operations on these channels will occur. The protected TV station locations specified in this section are the locations of record as of September 1974, and these do not change even though the TV stations may have been subsequently relocated.

    (a) Maximum ERP. The ERP of base transmitters must not exceed 100 Watts under any circumstances. The ERP of mobile transmitters must not exceed 60 Watts under any circumstances.

    (b) Co-channel protection from base transmitters. The ERP of base transmitters in the New York-Northeastern New Jersey urban area must not exceed the limits in the tables referenced in paragraphs (b)(2) and (b)(3) of this section. The limits depend upon the height above average terrain of the base transmitter antenna and the distance between the base transmitter and the nearest protected TV station location in paragraph (b)(1) of this section.

    (1) The protected TV station locations are as follows (all coordinates are referenced to North American Datum 1983 (NAD83)):

    Control transmitter frequency range Protected TV station location
    470-476 MHz Washington, DC, 38°57′17.4″ N. Lat. 77°00′15.9″ W. Long.
    476-482 MHz Lancaster, PA, 40°15′45.3″ N. Lat. 76°27′47.9″ W. Long.

    (2) Tables E-8 and E-9 of this section apply to base transmitters in the New York-Northeastern New Jersey urban area that transmit on channels in the 476-482 MHz range.

    (3) Tables E-10 and E-11 of this section apply to base transmitters in the New York-Northeastern New Jersey urban area that transmit on channels in the 470-476 MHz range.

    (c) Adjacent channel protection from base transmitters. The ERP of base transmitters must not exceed the limits in Table E-12 of this section. The limits depend upon the height above average terrain of the base transmitter antenna and the distance between the base transmitter and the nearest protected TV station location specified in paragraph (c)(1) of this section.

    (1) The protected TV station locations are as follows (all coordinates are referenced to North American Datum 1983 (NAD83)):

    Control transmitter frequency range Protected TV station location TV channel
    470-476 MHz Hanover, NH, 43°42′30.3″ N. Lat. 72°09′14.3″ W. Long (15)
    476-482 MHz
    482-488 MHz    		 Lancaster, PA, 40°15′45.3″ N. Lat. 76°27′47.9″ W. Long (15)
    Scranton, PA, 41°10′58.3″ N. Lat. 75°52′19.7″ W. Long (16)
    Hanover, NH, 43°42′30.3″ N. Lat. 72°09′14.3″ W. Long (15)

    Note: Coordinates are referenced to North American Datum 1983 (NAD83).

    (2) Table E-12 of this section applies to base transmitters in the New York-Northeastern New Jersey urban area.

    Table E-8 - Maximum ERP (Watts) for Base Transmitters (HAAT 152 Meters or Less)

    Distance to protected TV station in kilometers (miles) Antenna height above average terrain in meters (feet)
    15
    (50)     		30
    (100)     		46
    (150)     		61
    (200)     		76
    (250)     		91
    (300)     		107
    (350)     		122
    (400)     		137
    (450)     		152
    (500)
    209 (130) 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000
    201 (125) 1000 1000 1000 1000 1000 1000 1000 850 750 725
    193 (120) 1000 1000 1000 1000 900 750 675 600 550 500
    185 (115) 1000 1000 800 725 600 525 475 425 375 350
    177 (110) 850 700 600 500 425 375 325 300 275 225
    169 (105) 600 475 400 325 275 250 225 200 175 150
    161 (100) 400 325 275 225 175 150 140 125 110 100
    153 (95) 275 225 175 125 110 95 80 70 60 50
    145 (90) 175 125 100 75 50

    See § 22.659(b)(2). This table is for antenna heights of 152 meters (500 feet) or less above average terrain. For antenna heights between those in the table, use the next higher antenna height. For distances between those in the table, use the next lower distance.

    Table E-9 - Maximum ERP (Watts) for Base Transmitters (HAAT More Than 152 Meters)

    Distance to protected TV station in kilometers (miles) Antenna height above average terrain in meters (feet)
    152 (500) 305 (1000) 457 (1500) 610 (2000) 762 (2500) 914 (3000)
    209 (130) 1000 447 219 117 71 46
    193 (120) 500 209 95 50 30 19
    177 (110) 225 91 35 19 11 8
    161 (100) 100 30 10 5 3 2
    153 (95) 50 13 5 3 2 1

    See § 22.659(b)(2). This table is for antenna heights of more than 152 meters (500 feet) above average terrain. For intermediate values of height and/or distance, use linear interpolation to obtain the maximum permitted ERP.

    Table E-10 - Maximum ERP (Watts) for Base Transmitters (HAAT 152 Meters or Less)

    Distance to protected TV station in kilometers (miles) Antenna height above average terrain in meters (feet)
    15
    (50)     		30
    (100)     		46
    (150)     		61
    (200)     		76
    (250)     		91
    (300)     		107
    (350)     		122
    (400)     		137
    (450)     		152
    (500)
    261 (162) 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000
    257 (160) 1000 1000 1000 1000 1000 1000 1000 1000 1000 800
    249 (155) 1000 1000 1000 1000 1000 875 775 700 625 575
    241 (150) 1000 1000 950 775 725 625 550 500 450 400
    233 (145) 850 750 650 575 500 440 400 350 320 300
    225 (140) 600 575 465 400 350 300 275 250 230 225
    217 (135) 450 400 335 300 255 240 200 185 165 150
    209 (130) 350 300 245 200 185 160 145 125 120 100
    201 (125) 225 200 170 150 125 110 100 90 80 75
    193 (120) 175 150 125 105 90 80 70 60 55 50

    See § 22.659(b)(3). This table applies for antenna heights of 152 meters (500 feet) or less above average terrain. For antenna heights between those in the table, use the next higher antenna height. For distances between those in the table, use the next lower distance.

    Table E-11 - Maximum ERP (Watts) for Base Transmitters (HAAT More Than 152 Meters)

    Distance to protected TV station in kilometers (miles) Antenna height above average terrain in meters (feet)
    152 (500) 305 (1000) 457 (1500) 610 (2000) 762 (2500) 914 (3000)
    261 (162) 1000 501 282 170 110 71
    241 (150) 400 209 110 60 36 23
    225 (140) 225 102 50 28 16 10
    209 (130) 100 48 21 11 7 5
    193 (120) 50 19 9 5 3 2

    See § 22.659(b)(3). This table is for antenna heights of more than 152 meters (500 feet) above average terrain. For intermediate values of height and/or distance, use linear interpolation to obtain the maximum permitted ERP.

    Table E-12 - Maximum ERP (Watts) for Base Transmitters

    Distance to protected TV station in kilometers (miles) Antenna height above average terrain in meters (feet)
    30
    (100)     		46
    (150)     		61
    (200)     		76
    (250)     		91
    (300)     		107
    (350)     		122
    (400)     		137
    (450)     		152
    (500)
    108 (67) 1000 1000 1000 1000 1000 1000 1000 1000 1000
    106 (66) 1000 1000 1000 1000 1000 1000 1000 1000 750
    105 (65) 1000 1000 1000 1000 1000 1000 825 650 600
    103 (64) 1000 1000 1000 1000 1000 775 625 500 400
    101 (63) 1000 1000 1000 1000 440 400 350 320 300
    100 (62) 1000 1000 1000 525 375 250 200 150 125
    98 (61) 1000 700 450 250 200 125 100 75 50
    97 (60) 1000 425 225 125 100 75 50

    See § 22.659(c)(2). This table applies to base transmitters in the New York-Northeastern New Jersey urban areas. This table is for antenna heights of 152 meters (500 feet) or less above average terrain. For antenna heights between those in the table, use the next higher antenna height. For distances between those in the table, use the next lower distance.

    [59 FR 59507, Nov. 17, 1994, as amended at 63 FR 68947, Dec. 14, 1998]