Table A-Base Station-Cochannel Frequencies (50 dB Protection) Maximum Effective Radiated Power (ERP)1
Distance in kilometers (miles):2 | Antenna height in meters (feet) (AAT) | |||||||||
15 (50) | 30.5 (100) | 45 (150) | 61 (200) | 76 (250) | 91.5 (300) | 106 (350) | 122 (400) | 137 (450) | 152.5 (500) | |
260 (162) | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 |
257 (160) | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 800 |
249 (155) | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 875 | 775 | 700 | 625 | 575 |
241 (150) | 1,000 | 1,000 | 950 | 775 | 725 | 625 | 550 | 500 | 450 | 400 |
233 (145) | 850 | 750 | 650 | 575 | 500 | 440 | 400 | 350 | 320 | 300 |
225 (140) | 600 | 575 | 475 | 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 |
1 The effective radiated power (ERP) and antenna height above average terrain (AAT) shall not exceed the values given in this table.
2 At this distance from transmitter site of protected UHF television station.
Table B-Base Station-Cochannel Frequencies (40 dB Protection) Maximum Effective Radiated Power (ERP)1
Distance in kilometers (miles):2 | Antenna height in meters (feet) (AAT) | |||||||||
15 (50) | 30.5 (100) | 45 (150) | 61 (200) | 76 (250) | 91.5 (300) | 106 (350) | 122 (400) | 137 (450) | 152.5 (500) | |
209 (130) | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 |
201 (125) | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 850 | 750 | 725 |
193 (120) | 1,000 | 1,000 | 1,000 | 1,000 | 900 | 750 | 675 | 600 | 550 | 500 |
185 (115) | 1,100 | 1,000 | 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 |
1 The effective radiated power (ERP) and antenna height above average terrain shall not exceed the values given in this table.
2 At this distance from the transmitter site of protected UHF television station.
Table C-Mobile and Control Station-Distance Between Associated Base Station and Protected Cochannel TV Station
[50 dB protection]
Effective radiated power (watts) of mobile unit and control station | Distance | |
Kilometers | Miles | |
200 | 249 | 155 |
150 | 243 | 151 |
100 | 233 | 145 |
50 | 217 | 135 |
25 | 201 | 125 |
10 | 188 | 117 |
5 | 180 | 112 |
Table D-Mobile and Control Station-Distance Between Associated Land Mobile Base Station and Protected Cochannel TV Station
[40 dB protection]
Effective radiated power (watts) of mobile unit and control station | Distance | |
Kilometers | Miles | |
200 | 209 | 130 |
150 | 201 | 125 |
100 | 193 | 120 |
50 | 185 | 115 |
25 | 177 | 110 |
10 | 169 | 105 |
5 | 161 | 100 |
Table E-Base Station Adjacent Channel Frequencies Maximum Effective Radiated Power (ERP)1
Distance in kilometers (miles):2 3 | Antenna height in meters (feet) (AAT) | |||||||||
15 (50) | 30.5 (100) | 45 (150) | 61 (200) | 76 (250) | 91.5 (300) | 106 (350) | 122 (400) | 137 (450) | 152.5 (500) | |
108 (67) | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 |
106 (66) | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 750 |
104 (65) | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 825 | 650 | 600 |
103 (64) | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 775 | 625 | 500 | 400 |
101 (63) | 1,000 | 1,000 | 1,000 | 1,000 | 1,000 | 650 | 450 | 325 | 325 | 225 |
99 (62) | 1,000 | 1,000 | 1,000 | 1,000 | 525 | 375 | 250 | 200 | 150 | 125 |
98 (61) | 1,000 | 1,000 | 700 | 450 | 250 | 200 | 125 | 100 | 75 | 50 |
96 (60) | 1,000 | 1,000 | 425 | 225 | 125 | 100 | 75 | 50 |
1 The effective radiated power (ERP) and antenna height above average terrain (AAT) shall not exceed the values given in this table.
2 At this distance from transmitter site of protected UHF television station.
3 The minimum distance is 145 km (90 miles) where there are mobile units associated with the base station. See sec. 90.307(d).
Table "F"-Decibel Reduction/Power Equivalents
dB reduction below 1 kW | ERP permitted (figures rounded) |
1 | 795 |
2 | 630 |
3 | 500 |
4 | 400 |
5 | 315 |
6 | 250 |
7 | 200 |
8 | 160 |
9 | 125 |
10 | 100 |
11 | 80 |
12 | 65 |
13 | 50 |
14 | 40 |
15 | 30 |
16 | 25 |
17 | 20 |
18 | 15 |
19 | 12 |
20 | 10 |
21 | 8 |
22 | 6 |
23 | 5 |
24 | 4 |
25 | 3 |
26 | 2.5 |
27 | 2 |
28 | 1.5 |
29 | 1.25 |
30 | 1 |
47 C.F.R. §90.309
Section 0.231 (d) of the Commission's Rules and secs. 4(i) and 303 of the Communications Act, as amended
Section 0.231(d) of the Commission's Rules and secs. 4(i) and 303 of the Communications Act, as amended