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Calculating Range & Clearance
The Dynamic Range Budget
Outdoor Antenna Installation Guide D-9
Table D-4 Actual Clearance and Typical Range
Dynamic
Range
Optimal
Clearance
Line-of-Sight Clearance that is Actually Available
5 m (16.5 ft) 10 m (33 ft) 15 m (50 ft) 20 m (66 ft)
meters (ft) km (mi) km (mi) km (mi) km (mi)
106.8 dB 5.8 (19.1) 2.0 (1.2) 2.1 (1.3) 2.1 (1.3) 2.1 (1.3)
108.5 dB
6.5 (21.4) 2.2 (1.4) 2.5 (1.6) 2.5 (1.6) 2.5 (1.6)
109.8 dB* 7.0 (23.0) 2.4 (1.5) 2.9 (1.8) 2.9 (1.8) 2.9 (1.8)
110.2 dB 7.2 (23.7) 2.5 (1.6) 3.0 (1.9) 3.0 (1.9) 3.0 (1.9)
111.5 dB*
7.8 (25.7) 2.7 (1.7) 3.6 (2.2) 3.6 (2.2) 3.6 (2.2)
113.2 dB* 8.7 (28.6) 3.1 (1.9) 4.3 (2.7) 4.3 (2.7) 4.3 (2.7)
113.8 dB 9.0 (29.6) 3.2 (2.0) 4.6 (2.9) 4.6 (2.9) 4.6 (2.9)
115.5 dB
10.1 (33.2) 3.6 (2.2) 5.6 (3.5) 5.6 (3.5) 5.6 (3.5)
116.8 dB* 11.1 (36.5) 3.9 (2.4) 6.2 (3.9) 6.5 (4.0) 6.5 (4.0)
117.2 dB 11.5 (37.8) 4.1 (2.5) 6.5 (4.0) 6.8 (4.2) 6.8 (4.2)
118.5 dB*
12.6 (41.5) 4.4 (2.7) 7.3 (4.5) 8.0 (5.0) 8.0 (5.0)
120.2 dB* 14.4 (47.4) 5.1 (3.2) 10 (6.2) 9.7 (6.0) 9.7 (6.0)
120.8 dB 15.1 (49.7) 5.2 (3.2) 8.2 (5.1) 10.3 (6.4) 10.3 (6.4)
122.5 dB
17.5 (57.6) 5.7 (3.5) 9.1 (5.7) 12.0 (7.5) 12.0 (7.5)
123.8 dB* 19.8 (65.1) 6.4 (4.0) 9.6 (6.0) 12.7 (7.9) 14.6 (9.1)
124.2 dB 20.6 (67.8) 6.7 (4.2) 10.1 (6.3) 12.7 (7.9) 15.3 (9.5)
125.5 dB*
23.5 (77.3) 7.1 (4.4) 10.7 (6.6) 14.1 (8.8) 16.9 (10.5)
127.2 dB* 28.5 (93.8) 7.8 (4.8) 11.8 (7.3) 14.9 (9.3) 17.9 (11.1)