Determining the Antenna Locations
Determining the Antenna Locations
The following factors determine the locations where you can place the antennas relative to one another and the distances between them:
•Type of antennas. The RoamAbout antennas are described in Antenna Models on page 1‐9.
•Length of cable connecting the antenna to the AP.
•Data rate required.
•In a LAN‐to‐LAN network, the distance between the buildings.
•Obstructions in the signal path.
•In a wireless infrastructure network, the area around the antenna where clients need to communicate with the AP.
Typically, the RoamAbout directional and omni‐directional antennas are installed on rooftops. The directional antenna can also be installed on the side of a building. The following sections describe the factors that affect the range of the antennas.
Distances with Cables
Table 1‐2 lists the distances for the RBT‐4102, RBT‐4102‐EU, and the RBT‐4102 ‐BG. The distances include the cables at both ends. For every 6 dBi of cable loss, divide the distance by two. For every 10 dBi of cable loss, divide the distance by three.
. | Notes: |
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| • Be sure to calculate the cable loss at both ends, and include the pigtails. |
• The distance miles listed are approximate.
•If the
Table
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GHz | Antenna | Cables used | Rate | Throughput | Miles |
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5.7- 5.8
For use in North America only.
Pigtail and the | 54 Mbit/s | 21 Mbit/s | 2 | |
36 Mbit/s | 17 Mbit/s | 4 | ||
each end | ||||
24 Mbit/s | 13 Mbit/s | 6 | ||
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| 6 Mbit/s | 4.5 Mbit/s | 8 | |
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Pigtail and the | 54 Mbit/s | 21 Mbit/s | 1.2 | |
36 Mbit/s | 17 Mbit/s | 2.4 | ||
each end | ||||
24 Mbit/s | 13 Mbit/s | 3.5 | ||
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| 6 Mbit/s | 4.5 Mbit/s | 5 | |
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Pigtail and the | 54 Mbit/s | 21 Mbit/s | 0.8 | |
36 Mbit/s | 17 Mbit/s | 1.6 | ||
each end | ||||
24 Mbit/s | 13 Mbit/s | 2.3 | ||
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| 6 Mbit/s | 4.5 Mbit/s | 3.3 |
RoamAbout Antenna Site Preparation and Installation Guide
