47 C.F.R. § 22.627

Current through November 30, 2024

Section 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)
Distance to protected TV station in kilometers (miles)	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)
Distance to protected TV station in kilometers (miles)	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)
Distance to protected TV station in kilometers (miles)	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)
Distance to protected TV station in kilometers (miles)	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)
Distance to protected TV station in kilometers (miles)	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.

47 C.F.R. §22.627

59 FR 59507, Nov. 17, 1994; 60 FR 9890, Feb. 22, 1995, as amended at 63 FR 68946, Dec. 14, 1998