Cabletron Systems 802.11 - Manual (Page 14)

Site Preparation Guide
8
Other Considerations
The strength of each transmitted signal must be considered when planning your
antenna installation. Two parameters are usually listed to indicate transmitted signal
strength: output power of the radio transmitter, and gain of the antenna system.
• Output Power of radio equipment is often subject to maximum limits as
defined by local radio regulations. Consequently output power is not by
definition the way to enhance wireless performance.
• High gain antennas are larger in size than low gain antennas, and are
characterized by a narrow focus of the radio beam. These two characteristics
make it more difficult to aim the antennas, and/or adjust antenna alignment to
optimize the performance of the wireless point-to-point link.
With these points in mind, the design of antennas and components supplied with the
RoamAbout Outdoor Kit are based upon the following principles:
• An output power and antenna gain that comply with the maximum limits as
defined by local governing bodies concerning radio transmissions.
• Enhanced radio sensitivity for optimal reception of RoamAbout radio signals
transmitted by remote antennas.
The following distances are required before contacting the Antenna Installation
Company:
Distance between the antennas:
Cable length needed at building A:
Cable length needed at building B:
Height of building A:
Height of building B:
All possible obstacles which can
interfere with the defined radius.