§ 22.627   Effective radiated power limits.

   The effective radiated power (ERP) of transmitters operating on the channels
   listed in § 22.621 must not exceed the limits in this section.

   (a) Maximum ERP. The ERP must not exceed the applicable limits in this
   paragraph under any circumstances.
   Frequency range (MHz) Maximum ERP (watts)
   470-512                              1000
   928-929                                50
   932-933                                30
   941-942                               600
   952-960                               150

   (b)  470-512 MHz limits. The purpose of the rules in paragraphs (b)(1)
   through (b)(3) of this section is to reduce the likelihood that interference
   to television receiption 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.

   (1) Co-channel protection. The ERP of control transmitters must not exceed
   the limits in the tables in paragraphs (b)(1)(ii) and (b)(1)(iii) of this
   section. The limits depend upon the height above average terrain of the
   control transmitter antenna and the distance between the control transmitter
   and the nearest protected TV station location in paragraph (b)(1)(i) of this
   section.

   (i) 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 Jacksonville, IL, 39°45′52.2″ N. Lat. 90°30′29.5″ W. Long.
       Mt. Pleasant, MI, 43°34′24.1″ N. Lat. 84°46′21.1″ W. Long.
   476-482 MHz
   482-488 MHz
   488-494 MHz
   494-500 MHz
   500-506 MHz
   506-512 MHz Oxford, OH, 39°30′26.2″ N. Lat. 84°44′8.8″ W. Long.
   Washington, DC, 38°57′17.4″ N. Lat. 77°00′15.9″ W. Long.
   Champaign, IL, 40°04′11.1″ N. Lat. 87°54′45.1″ W. Long.
   Madison, WI, 43°03′01.0″ N. Lat. 89°29′15.4″ W. Long.
   Parkersburg, WV, 39°20′50.3″ N. Lat. 81°33′55.5″ W. Long.
   Fort Wayne, IN, 41°05′35.2″ N. Lat. 85°10′41.9″ W. Long.
   Lancaster, PA, 40°15′45.3″ N. Lat. 76°27′47.9″ W. Long.
   South Bend, IN, 41°36′26.2″ N. Lat. 86°27′48.1″ W. Long.
   Philadelphia, PA, 40°02′30.4″ N. Lat. 75°14′22.6″ W. Long.
       None.
   Johnstown, PA, 40°19′47.3″ N. Lat. 78°53′44.1″ W. Long.
   Washington, DC, 38°57′49.4″ N. Lat. 77°06′16.9″ W. Long.
   Waterbury, CT, 41°31′2.3″ N. Lat. 73°00′58.4″ W. Long.

   (ii)  Table  E-3  and  E-4  apply  to  control transmitters in the New
   York-Northeastern New Jersey and Cleveland urban areas that transmit on
   channels in the 476-482 MHz range and to control transmitters in the Detroit
   urban area that transmit on channels in the 482-488 MHz range.

   (iii) Tables E-5 and E-6 apply to all control transmitters except those to
   which Tables E-3 and E-4 apply.

   (2) Adjacent channel protection. The ERP of control transmitters must not
   exceed the limits in Table E-7. The limits depend upon the height above
   average terrain of the control transmitter antenna and the distance between
   the control transmitter and the nearest protected TV station location listed
   in this paragraph. 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)
       Madison, WI, 43°03′01.0″ N. Lat. 89°29′15.4″ W. Long. (15)
       Champaign, IL, 40°04′11.1″ N. Lat. 87°54′45.1″ W. Long. (15)
       San Diego, CA, 32°41′48.2″ N. Lat. 116°56′13.1″ W. Long. (15)
       Lancaster, PA, 40°15′45.3″ N. Lat. 76°27′47.9″ W. Long. (15)
       Parkersburg, WV, 39°20′50.3″ N. Lat. 81°33′55.5″ W. Long. (15)
   476-482 MHz South Bend, IN, 41°36′26.2″ N. Lat. 86°27′48.1″ W. Long. (16)
       Pittsburgh, PA, 40°26′46.2″ N. Lat. 79°57′50.2″ W. Long. (16)
       Mt. Pleasant, MI, 43°34′24.1″ N. Lat. 84°46′21.1″ W. Long. (14)
       Scranton, PA, 41°10′58.3″ N. Lat. 75°52′19.7″ W. Long. (16)
   482-488 MHz Hanover, NH, 43°42′30.3″ N. Lat. 72°09′14.3″ W. Long. (15)
       Fort Wayne, IN, 41°05′35.2″ N. Lat. 85°10′41.9″ W. Long. (15)
   488-494 MHz Salisbury, MD, 38°24′15.4″ N. Lat. 75°34′43.7″ W. Long. (16)
   494-500 MHz Philadelphia, PA, 40°02′30.4″ N. Lat. 75°14′22.6″ W. Long. (17)
   500-506 MHz Washington, DC, 38°57′17.4″ N. Lat. 77°00′15.9″ W. Long. (20)
   506-512 MHz Harrisburg, PA, 40°20′44.3″ N. Lat. 76°52′07.9″ W. Long. (21)

   (c) Los Angeles area. This paragraph applies only to control transmitters in
   the Los Angeles urban area that utilize an antenna height of 457 or more
   meters  (1500  or  more  feet)  above  mean sea level. The ERP of such
   transmitters must not exceed the following limits:
        Antenna height         ERP
     AMSL in meters (feet)    (Watts)
   457 (1500) to 610 (2000)       155
   611 (2001) to 762 (2500)       100
   763 (2501) to 914 (3000)        70
   915 (3001) to 1067 (3500)       50
   1068 (3501) to 1219 (4000)      40
   1220 (4001) to 1372 (4500)      30
   1373 (4501) and above           25

   Table E-3—Maximum ERP (Watts) for Control 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 § 22.627(b)(1)(ii). 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-4—Maximum ERP (Watts) for Control 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 § 22.627(b)(1)(ii). 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-5—Maximum ERP (Watts) for Control 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 § 22.627(b)(1)(iii). 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-6—Maximum ERP (Watts) for Control 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 § 22.627(b)(1)(iii). 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-7—Maximum ERP (Watts) for Control 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 § 22.627(b)(2). This table applies to control transmitters in the Boston,
   Chicago, Cleveland, Detroit, Los Angeles, New York-Northeastern New Jersey,
   Philadelphia, Pittsburgh and Washington, DC 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;  60 FR 9890 , Feb. 22, 1995; as amended at  63 FR 68946 , Dec. 14, 1998]

   return arrow Back to Top

470-512 MHz Trunked Mobile Operation

   return arrow Back to Top