The separation distances in this section apply to fixed, mobile, and personal/portable white space devices with a location accuracy of ±50 meters. These distances must be increased by the amount that the location uncertainty of a white space device exceeds ±50 meters. Narrowband white space devices shall comply with the separation distances applicable to a fixed white space device operating with 30 dBm conducted power and 36 dBm EIRP across a 6 megahertz channel.
Type of station | Protected contour | ||
Channel | Contour (dBu) | Propagation curve | |
Analog: Class A TV, LPTV, translator and booster | Low VHF (2-6) | 47 | F(50,50) |
High VHF (7-13) | 56 | F(50,50) | |
UHF (14-69) | 64 | F(50,50) | |
Digital: Full service TV, Class A TV, LPTV, translator and booster | Low VHF (2-6) | 28 | F(50,90) |
High VHF (7-13) | 36 | F(50,90) | |
UHF (14-51) | 41 | F(50,90) |
Table 2 to Paragraph (a)(2)(v)
Mode II personal/portable white space devices | ||
Required separation in kilometers from co-channel digital or analog TV (full service or low power) protected contour | ||
16 dBm (40 mW) | 20 dBm (100 mW) | |
Communicating with Mode II or Fixed device | 1.3 | 1.7 |
Communicating with Mode I device | 2.6 | 3.4 |
Table 3 to Paragraph (a)(2)(v)
Fixed white space devices | ||||||||
Antenna height above average terrain of unlicensed devices (meters) | Required separation in kilometers from co-channel digital or analog TV (full service or low power) protected contour1 | |||||||
16 dBm (40 mW) | 20 dBm (100 mW) | 24 dBm (250 mW) | 28 dBm (625 mW) | 32 dBm (1,600 mW) | 36 dBm (4 W) | 40 dBm (10 W) | 42 dBm (16 W) | |
Less than 3 | 1.3 | 1.7 | 2.1 | 2.7 | 3.3 | 4.0 | 4.5 | 5.0 |
3-10 | 2.4 | 3.1 | 3.8 | 4.8 | 6.1 | 7.3 | 8.5 | 9.4 |
10-30 | 4.2 | 5.1 | 6.0 | 7.1 | 8.9 | 11.1 | 13.9 | 15.3 |
30-50 | 5.4 | 6.5 | 7.7 | 9.2 | 11.5 | 14.3 | 19.1 | 20.9 |
50-75 | 6.6 | 7.9 | 9.4 | 11.1 | 13.9 | 18.0 | 23.8 | 26.2 |
75-100 | 7.7 | 9.2 | 10.9 | 12.8 | 17.2 | 21.1 | 27.2 | 30.1 |
100-150 | 9.4 | 11.1 | 13.2 | 16.5 | 21.4 | 25.3 | 32.3 | 35.5 |
150-200 | 10.9 | 12.7 | 15.8 | 19.5 | 24.7 | 28.5 | 36.4 | 39.5 |
200-250 | 12.1 | 14.3 | 18.2 | 22.0 | 27.3 | 31.2 | 39.5 | 42.5 |
250-300 | 13.9 | 16.4 | 20.0 | 23.9 | 29.4 | 35.4 | 42.1 | 45.9 |
300-350 | 15.3 | 17.9 | 21.7 | 25.7 | 31.4 | 37.6 | 44.5 | 48.4 |
350-400 | 16.6 | 19.3 | 23.2 | 27.3 | 33.3 | 39.7 | 46.9 | 51.0 |
400-450 | 17.6 | 20.4 | 24.4 | 28.7 | 35.1 | 41.9 | 49.4 | 53.8 |
450-500 | 18.3 | 21.4 | 25.5 | 30.1 | 36.7 | 43.7 | 51.4 | 55.9 |
500-550 | 18.9 | 21.8 | 26.3 | 31.0 | 37.9 | 45.3 | 53.3 | 57.5 |
1 When communicating with Mode I personal/portable white space devices, the required separation distances must be increased beyond the specified distances by 1.3 kilometers if the Mode I device operates at power levels no more than 40 mW EIRP or 1.7 kilometers if the Mode I device operates at power levels above 40 mW EIRP.
Table 4 to Paragraph (a)(2)(v)
Personal/portable white space devices | |
Required separation in kilometers from adjacent channel digital or analog TV (full service or low power) protected contour | |
20 dBm (100 mW) | |
Communicating with Mode II or Fixed device | 0.1 |
Communicating with Mode I device | 0.2 |
Table 5 to Paragraph (a)(2)(v)
Fixed white space devices | |||||||
Antenna height above average terrain of unlicensed devices (meters) | Required separation in kilometers from adjacent channel digital or analog TV (full service or low power) protected contour1 | ||||||
20 dBm (100 mW) | 24 dBm (250 mW) | 28 dBm (625 mW) | 32 dBm (1,600 mW) | 36 dBm (4 W) | 40 dBm (10 W) | 42 dBm (16 W) | |
Less than 3 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.3 |
3-10 | 0.1 | 0.2 | 0.2 | 0.2 | 0.3 | 0.4 | 0.5 |
10-30 | 0.2 | 0.3 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 |
30-50 | 0.3 | 0.3 | 0.4 | 0.5 | 0.7 | 0.8 | 1.0 |
50-75 | 0.3 | 0.4 | 0.5 | 0.7 | 0.8 | 0.9 | 1.0 |
75-100 | 0.4 | 0.5 | 0.6 | 0.8 | 1.0 | 1.1 | 1.3 |
100-150 | 0.5 | 0.6 | 0.8 | 0.9 | 1.2 | 1.3 | 1.5 |
150-200 | 0.5 | 0.7 | 0.9 | 1.1 | 1.4 | 1.5 | 1.7 |
200-250 | 0.6 | 0.8 | 1.0 | 1.2 | 1.5 | 1.7 | 1.9 |
250-300 | 0.7 | 0.8 | 1.0 | 1.3 | 1.6 | 2.1 | 2.3 |
300-350 | 0.7 | 0.9 | 1.1 | 1.4 | 1.8 | 2.2 | 2.4 |
350-400 | 0.8 | 1.0 | 1.2 | 1.5 | 1.9 | 2.4 | 2.7 |
400-450 | 0.8 | 1.0 | 1.3 | 1.6 | 2.1 | 2.6 | 2.9 |
450-500 | 0.8 | 1.1 | 1.4 | 1.7 | 2.1 | 2.7 | 2.9 |
500-550 | 0.9 | 1.2 | 1.5 | 1.8 | 2.2 | 2.8 | 3.0 |
1 When communicating with a Mode I personal/portable white space device that operates at power levels above 40 mW EIRP, the required separation distances must be increased beyond the specified distances by 0.1 kilometers.
Table 6 to Paragraph (d)(1)
White space device transmitter power | Required separation in kilometers from the areas specified in § 90.303(a) of this chapter | |||
Co-channel operation | Adjacent channel operation | |||
Up to 250 meters HAAT | Greater than 250 meters HAAT | Up to 250 meters HAAT | Greater than 250 meters HAAT | |
Up to 4 watts EIRP | 134.0 | 158.0 | 131.0 | 155.4 |
Greater than 4 watts and up to 10 watts EIRP | 136.0 | 169.8 | 131.5 | 166.0 |
Greater than 10 watts and up to 16 watts EIRP | 139.2 | 171.1 | 132.2 | 166.2 |
Table 7 to Paragraph (d)(2)
White space device transmitter power | Required separation in kilometers from operations authorized by waiver outside of the areas specified in § 90.303(a) of this chapter | |||
Co-channel operation | Adjacent channel operation | |||
Up to 250 meters HAAT | Greater than 250 meters HAAT | Up to 250 meters HAAT | Greater than 250 meters HAAT | |
Up to 4 watts EIRP | 54.0 | 78.0 | 51.0 | 75.4 |
Greater than 4 watts and up to 10 watts EIRP | 56.0 | 89.8 | 51.5 | 86.0 |
Greater than 10 watts and up to 16 watts EIRP | 59.2 | 91.1 | 52.2 | 86.2 |
Observatory | Latitude (deg/min/sec) | Longitude (deg/min/sec) |
Arecibo Observatory | 18 20 37 N | 066 45 11 W |
Green Bank Telescope (GBT) | 38 25 59 N | 079 50 23 W |
Very Long Baseline Array (VLBA) Stations: | ||
Pie Town, NM | 34 18 04 N | 108 07 09 W |
Kitt Peak, AZ | 31 57 23 N | 111 36 45 W |
Los Alamos, NM | 35 46 30 N | 106 14 44 W |
Ft. Davis, TX | 30 38 06 N | 103 56 41 W |
N. Liberty, IA | 41 46 17 N | 091 34 27 W |
Brewster, WA | 48 07 52 N | 119 41 00 W |
Owens Valley, CA | 37 13 54 N | 118 16 37 W |
St. Croix, VI | 17 45 24 N | 064 35 01 W |
Hancock, NH | 42 56 01 N | 071 59 12 W |
Mauna Kea, HI | 19 48 05 N | 155 27 20 W |
North latitude (deg/min/sec) | West longitude (deg/min/sec) |
35 25 56.28 | 107 44 56.40 |
35 15 57.24 | 107 41 27.60 |
33 52 14.16 | 107 30 25.20 |
33 22 39.36 | 107 49 26.40 |
33 57 38.52 | 109 36 10.80 |
34 04 46.20 | 109 34 12.00 |
34 27 20.88 | 109 12 43.20 |
35 15 30.24 | 108 25 55.20 |
North latitude (deg/min/sec) | West longitude (deg/min/sec) |
34 08 18.24 | 111 36 46.80 |
33 54 10.08 | 109 38 20.40 |
32 09 25.56 | 113 42 03.60 |
31 29 15.72 | 111 33 43.20 |
33 20 36.60 | 113 36 14.40 |
34 09 20.52 | 112 34 37.20 |
North latitude (deg/min/sec) | West longitude (deg/min/sec) |
36 25 54.12 | 106 06 07.20 |
36 32 26.88 | 105 59 27.60 |
36 45 23.40 | 105 48 03.60 |
36 48 10.44 | 105 30 21.60 |
36 13 37.92 | 105 26 38.40 |
35 38 40.92 | 105 48 36.00 |
35 36 51.48 | 105 49 30.00 |
34 06 17.28 | 107 10 48.00 |
34 16 18.12 | 107 17 16.80 |
35 21 22.68 | 106 51 07.20 |
North latitude (deg/min/sec) | West longitude (deg/min/sec) |
30 42 16.92 | 103 55 22.80 |
30 35 49.92 | 103 41 52.80 |
30 32 35.88 | 103 43 04.80 |
30 25 20.64 | 103 49 48.00 |
30 24 30.24 | 103 52 30.00 |
30 26 14.28 | 103 57 54.00 |
30 33 03.60 | 104 09 10.80 |
30 40 03.36 | 104 05 9.60 |
30 43 11.28 | 103 58 48.00 |
North latitude (deg/min/sec) | West longitude (deg/min/sec) |
42 03 27.00 | 90 54 16.56 |
41 59 03.12 | 90 46 49.44 |
41 34 19.20 | 90 51 11.16 |
41 19 27.12 | 90 58 58.80 |
41 02 09.96 | 91 07 18.84 |
41 07 51.24 | 92 03 44.64 |
41 50 03.12 | 92 36 20.16 |
42 28 50.16 | 91 44 35.16 |
North latitude (deg/min/sec) | West longitude (deg/min/sec) |
48 18 00.36 | 119 35 27.60 |
48 16 40.08 | 119 34 51.60 |
48 15 20.52 | 119 34 33.60 |
48 12 26.64 | 119 34 08.40 |
48 07 51.96 | 119 34 33.60 |
48 06 44.64 | 119 34 48.00 |
47 58 44.40 | 119 36 03.60 |
47 55 06.60 | 119 37 40.80 |
47 52 48.72 | 119 39 03.60 |
48 00 49.68 | 119 59 06.00 |
48 26 59.64 | 119 46 04.80 |
48 26 08.52 | 119 43 22.80 |
North latitude (deg/min/sec) | West longitude (deg/min/sec) |
37 05 49.56 | 118 02 13.20 |
37 03 27.36 | 118 01 08.40 |
36 29 09.96 | 118 06 50.40 |
36 30 48.60 | 118 11 56.40 |
36 37 08.04 | 118 16 37.20 |
37 25 12.72 | 118 41 16.80 |
37 27 30.24 | 118 41 02.40 |
37 44 45.96 | 118 39 03.60 |
37 59 49.92 | 118 32 09.60 |
37 46 12.72 | 118 20 09.60 |
North latitude (deg/min/sec) | West longitude (deg/min/sec) |
18 29 15.36 | 64 22 38.28 |
18 06 51.12 | 64 08 03.84 |
18 04 31.44 | 64 06 12.24 |
18 02 02.76 | 64 04 33.96 |
17 59 26.52 | 64 03 09.36 |
17 56 43.80 | 64 01 59.52 |
17 53 56.04 | 64 01 04.80 |
17 51 03.96 | 64 00 25.56 |
17 48 09.72 | 64 00 02.16 |
17 42 19.08 | 63 58 57.36 |
17 39 07.92 | 63 58 15.96 |
17 42 10.44 | 64 39 37.44 |
17 43 57.00 | 64 50 46.32 |
18 07 24.24 | 66 02 36.96 |
18 16 13.80 | 65 44 56.04 |
North latitude (deg/min/sec) | West longitude (deg/min/sec) |
44 08 59.64 | 71 32 01.68 |
43 46 24.60 | 71 18 57.60 |
42 58 41.88 | 71 15 14.04 |
42 29 25.08 | 71 52 51.96 |
42 34 05.88 | 72 07 08.76 |
42 34 41.52 | 72 09 41.76 |
42 55 47.28 | 72 55 03.72 |
North latitude (deg/min/sec) | West longitude (deg/min/sec) |
20 11 01.32 | 153 03 43.20 |
20 00 52.92 | 152 35 56.40 |
19 46 42.60 | 152 35 34.80 |
19 32 33.36 | 152 36 28.80 |
19 18 31.68 | 152 38 38.40 |
19 04 44.04 | 152 42 07.20 |
18 51 16.56 | 152 46 51.60 |
18 38 15.72 | 152 52 44.40 |
18 25 46.56 | 152 59 49.20 |
18 13 55.20 | 153 07 55.20 |
18 02 46.68 | 153 17 06.00 |
17 52 26.40 | 153 27 14.40 |
17 42 57.96 | 153 38 16.80 |
17 35 20.04 | 153 50 45.60 |
17 27 52.20 | 154 03 10.80 |
17 21 27.00 | 154 16 15.60 |
17 16 08.40 | 154 29 49.20 |
17 11 57.84 | 154 43 51.60 |
17 08 57.48 | 154 58 08.40 |
17 07 09.12 | 155 12 43.20 |
17 23 53.52 | 155 27 21.60 |
19 29 13.92 | 155 36 21.60 |
19 47 53.88 | 155 29 27.60 |
19 48 52.92 | 155 27 39.60 |
19 48 58.68 | 155 27 14.40 |
Mode II Personal/Portable White Space Devices
600 MHz band wireless uplink spectrum Minimum co-channel separation distances in kilometers between white space devices and any point along the edge of a polygon representing the outer edge of base station or other radio facility deployment | ||
16 dBm (40 mW) | 20 dBm (100 mW) | |
Communicating with Mode II or Fixed device | 5 | 6 |
Communicating with Mode I device | 10 | 12 |
Fixed White Space Devices
Antenna height above average terrain of unlicensed devices (meters) | 600 MHz band wireless uplink spectrum Minimum co-channel separation distances in kilometers between white space devices and any point along the edge of a polygon representing the outer edge of base station or other radio facility deployment* | ||||||
16 dBm (40mW) | 20 dBm (100 mW) | 24 dBm (250mW) | 28 dBm (625 mW) | 32 dBm (1600 mW) | 36 dBm (4 W) | 40 dBm (10 W) | |
Less than 3 | 5 | 6 | 7 | 9 | 12 | 15 | 19 |
3-10 | 9 | 11 | 14 | 17 | 22 | 27 | 34 |
10-30 | 15 | 19 | 24 | 30 | 38 | 47 | 60 |
30-50 | 20 | 24 | 31 | 38 | 49 | 60 | 60 |
50-75 | 24 | 30 | 37 | 47 | 60 | 60 | 60 |
75-100 | 27 | 34 | 43 | 54 | 60 | 60 | 60 |
100-150 | 33 | 42 | 53 | 60 | 60 | 60 | 60 |
150-200 | 39 | 49 | 60 | 60 | 60 | 60 | 60 |
200-250 | 43 | 54 | 60 | 60 | 60 | 60 | 60 |
*When communicating with Mode I personal/portable white space devices, the required separation distances must be increased beyond the specified distances by 5 kilometers if the Mode I device operates at power levels no more than 40 mW EIRP or 6 kilometers if the Mode I device operates at power levels above 40 mW EIRP.
Personal/Portable White Space Devices
600 MHz band wireless uplink spectrum Minimum adjacent channel separation distances in kilometers between white space devices and any point along the edge of a polygon representing the outer edge of base station or other radio facility deployment | |
20 dBm (100 mW) | |
Communicating with Mode II or Fixed device | 0.1 |
Communicating with Mode I device | 0.3 |
Fixed White Space Devices
Antenna height above average terrain of unlicensed devices (meters) | 600 MHz band wireless uplink spectrum Minimum adjacent channel separation distances in kilometers between white space devices and any point along the edge of a polygon representing the outer edge of base station or other radio facility deployment* | |||||
20 dBm (100 mW) | 24 dBm (250mW) | 28 dBm (625 mW) | 32 dBm (1600 mW) | 36 dBm (4 W) | 40 dBm (10 W) | |
Less than 3 | 0.1 | 0.2 | 0.2 | 0.3 | 0.4 | 0.4 |
3-10 | 0.3 | 0.3 | 0.4 | 0.5 | 0.6 | 0.8 |
10-30 | 0.4 | 0.6 | 0.7 | 0.9 | 1.1 | 1.4 |
30-50 | 0.6 | 0.7 | 0.9 | 1.2 | 1.4 | 1.8 |
50-75 | 0.7 | 0.9 | 1.1 | 1.4 | 1.8 | 2.2 |
75-100 | 0.8 | 1.0 | 1.3 | 1.6 | 2.0 | 2.6 |
100-150 | 1.0 | 1.3 | 1.6 | 2.0 | 2.5 | 3.1 |
150-200 | 1.2 | 1.4 | 1.8 | 2.3 | 2.9 | 3.6 |
200-250 | 1.3 | 1.6 | 2.0 | 2.6 | 3.2 | 4.1 |
*When communicating with Mode I personal/portable white space devices, the required separation distances must be increased beyond the specified distances by 0.1 kilometers.
Table 23 to Paragraph (j)(1)(i)
Required co-channel separation distances in kilometers from edge of polygon | |
16 dBm (40 mW) | |
Communicating with Mode II or Fixed device | 0.38 |
Communicating with Mode I device | 0.76 |
Table 24 to Paragraph (j)(1)(ii)
Antenna height above average terrain of unlicensed devices (meters) | Required co-channel separation distances in kilometers from edge of polygon |
16 dBm (40 mW) | |
Less than 3 | 0.38 |
3-10 | 0.70 |
10-30 | 1.20 |
30-50 | 1.55 |
50-75 | 1.90 |
75-100 | 2.20 |
100-150 | 2.70 |
150-200 | 3.15 |
200-250 | 3.50 |
Table 25 to Paragraph (j)(2)(i)
Required adjacent channel separation distances in meters from edge of polygon | ||
16 dBm (40 mW) | 20 dBm (100 mW) | |
Communicating with Mode II or Fixed device | 8 | 13 |
Communicating with Mode I device | 16 | 26 |
Table 26 to Paragraph (j)(2)(ii)
Required adjacent channel separation distances in meters from edge of polygon | |||||
16 dBm (40 mW) | 20 dBm (100 mW) | 24 dBm (250 mW) | 28 dBm (625 mW) | 32 dBm (1600 mW) | 36 dBm (4 watts) |
8 | 13 | 20 | 32 | 50 | 71 |
47 C.F.R. §15.712