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Bridge Link Planning
3-4
.
Note that to avoid any obstruction along the path, the height of
the object must be added to the minimum clearance required for a
clear radio line-of-sight. Consider the following simple example,
illustrated in the figure below.
Total Link
Distance
Max Clearance
for 60% of First
Fresnel Zone at
5.8 GHz
Approximate
Clearance for
Earth
Curvature
Total
Clearance
Required at
Mid-point of
Link
0.25 mile (402 m)
4.5 ft (1.4 m)
0
4.5 ft (1.4 m)
0.5 mile (805 m)
6.4 ft (1.95 m)
0
6.4 ft (1.95 m)
1 mile (1.6 km)
9 ft (2.7 m)
0
9 ft (2.7 m)
2 miles (3.2 km)
12.7 ft (3.9 m)
0
12.7 ft (3.9 m)
3 miles (4.8 km)
15.6 ft (4.8 m)
1.8 ft (0.5 m)
17.4 ft (5.3 m)
4 miles (6.4 km)
18 ft (5.5 m)
3.2 ft (1.0 m)
21.2 ft (6.5 m)
5 miles (8 km)
20 ft (6.1 m)
5 ft (1.5 m)
25 ft (7.6 m)
7 miles (11.3 km)
24 ft (7.3 m)
9.8 ft (3.0 m)
33.8 ft (10.3 m)
9 miles (14.5 km)
27 ft (8.2 m)
16 ft (4.9 m)
43 ft (13.1 m)
12 miles (19.3 km) 31 ft (9.5 m)
29 ft (8.8 m)
60 ft (18.3 m)
15 miles (24.1 km) 35 ft (10.7 m)
45 ft (13.7 m)
80 ft (24.4 m)
17 miles (27.4 km) 37 ft (11.3 m)
58 ft (17.7 m)
95 ft (29 m)
A
B
3 miles (4.8 km)
5.4 m
17 m
20 m
2.4 m
12 m
9 m
1.4 m
Visual Line of Sight
Radio Line of Sight
Summary of Contents for 2888W-M
Page 22: ...TABLE OF CONTENTS xx ...
Page 36: ...Introduction 1 14 ...
Page 44: ...Network Configuration 2 8 ...
Page 64: ...Hardware Installation 4 12 ...
Page 76: ...Initial Configuration 5 12 ...
Page 169: ...Status Information 6 93 ...
Page 170: ...System Configuration 6 94 ...
Page 296: ...Command Line Interface 7 126 ...
Page 304: ...Specifications B 6 ...
Page 310: ...Cables and Pinouts C 6 ...
Page 316: ...Glossary Glossary 6 ...
Page 321: ......
Page 322: ...SMC2888W S SMC2888W M ...