Learn About The Law
Get help with your legal needs
FindLaw’s Learn About the Law features thousands of informational articles to help you understand your options. And if you’re ready to hire an attorney, find one in your area who can help.
Code of Federal Regulations Title 47. Telecommunication § 47.22.659 Effective radiated power limits
Current as of January 02, 2025 | Updated by Findlaw Staff
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 |
Lancaster, PA, 40°15′45.3″ N. Lat. 76°27′47.9″ W. Long |
(15) |
|
482-488 MHz |
||
|
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 |
30 |
46 |
61 |
76 |
91 |
107 |
122 |
137 |
152 |
|
|
(50) |
(100) |
(150) |
(200) |
(250) |
(300) |
(350) |
(400) |
(450) |
(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 |
305 |
457 |
610 |
762 |
914 |
|
|
(500) |
(1000) |
(1500) |
(2000) |
(2500) |
(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 |
30 |
46 |
61 |
76 |
91 |
107 |
122 |
137 |
152 |
|
|
(50) |
(100) |
(150) |
(200) |
(250) |
(300) |
(350) |
(400) |
(450) |
(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 |
46 |
61 |
76 |
91 |
107 |
122 |
137 |
152 |
|
|
(100) |
(150) |
(200) |
(250) |
(300) |
(350) |
(400) |
(450) |
(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. |
Cite this article: FindLaw.com - Code of Federal Regulations Title 47. Telecommunication § 47.22.659 Effective radiated power limits - last updated January 02, 2025 | https://codes.findlaw.com/cfr/title-47-telecommunication/cfr-sect-47-22-659/
FindLaw Codes may not reflect the most recent version of the law in your jurisdiction. Please verify the status of the code you are researching with the state legislature before relying on it for your legal needs.
Was this helpful?
Welcome to FindLaw's Cases & Codes
A free source of state and federal court opinions, state laws, and the United States Code. For more information about the legal concepts addressed by these cases and statutes, visit FindLaw’s Learn About the Law.
Latest Blog Posts
For Legal Professionals
Need to Find an Attorney?
Search our directory by legal issue
Enter information in one or both fields (Required)