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Radio Path Planning
3-5
A wireless bridge link is deployed to connect building A to a
building B, which is located three miles (4.8 km) away. Mid-way
between the two buidings is a small tree-covered hill. From the
above table it can be seen that for a three-mile link, the object
clearance required at the mid-point is 5.3 m (17.4 ft). The
tree-tops on the hill are at an elevation of 17 m (56 ft), so the
antennas at each end of the link need to be at least 22.3 m (73 ft)
high. Building A is six stories high, or 20 m (66 ft), so a 2.3 m
(7.5 ft) mast or pole must be contructed on its roof to achieve the
required antenna height. Building B is only three stories high, or 9
m (30 ft), but is located at an elevation that is 12 m (39 ft) higher
than bulding A. To mount an anntena at the required height on
building B, a mast or pole of only 1.3 m (4.3 ft) is needed.
Warning:
Never construct a radio mast, pole, or tower near overhead
power lines.
Note:
Local regulations may limit or prevent construction of a high radio
mast or tower. If your wireless bridge link requires a high radio
mast or tower, consult a professional contractor for advice.
Antenna Position and Orientation
Once the required antenna height has been determined, other
factors affecting the precise position of the wireless bridge must
be considered:
•
Be sure there are no other radio antennas within 2 m (6 ft) of
the wireless bridge
•
Place the wireless bridge away from power and telephone
lines
•
Avoid placing the wireless bridge too close to any metallic
reflective surfaces, such as roof-installed air-conditioning
equipment, tinted windows, wire fences, or water pipes
Содержание 2888W-M
Страница 22: ...TABLE OF CONTENTS xx ...
Страница 36: ...Introduction 1 14 ...
Страница 44: ...Network Configuration 2 8 ...
Страница 64: ...Hardware Installation 4 12 ...
Страница 76: ...Initial Configuration 5 12 ...
Страница 169: ...Status Information 6 93 ...
Страница 170: ...System Configuration 6 94 ...
Страница 296: ...Command Line Interface 7 126 ...
Страница 304: ...Specifications B 6 ...
Страница 310: ...Cables and Pinouts C 6 ...
Страница 316: ...Glossary Glossary 6 ...
Страница 321: ......
Страница 322: ...SMC2888W S SMC2888W M ...