Cabletron Systems FLIU-1, Руководство по установке

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SITE PLANNING AND INSTALLATION
Page 2 - 5
2.5.1 WIRELESS HUB ANTENNA
The FreeLINK Ethernet Hub supports up to 62 wireless
transceivers from an antenna within a service area with a radius of
80 meters. In actuality, the service area size depends upon physical
limitations such as walls, cabinets, stanchions, etc. However, the
spread spectrum radio transmission technology has good
dispersion characteristics, and will ßood irregular areas with the
transmission signal effectively.
The antenna can transmit and receive in 360 degrees of rotation,
focusing on an area from 30 degrees above to 30 degrees below the
horizon. The horizon, in this case is the vertical center of the
transmitting antenna (see Figure 2-6, Wireless Hub Antenna
Service Area). The Wireless Hub Antenna should be positioned
from a minimum of four feet above the ßoor to a maximum of one
foot below the room ceiling. All workstation transceivers must be
within the 80 meter working radius of the Wireless Hub Antenna.
Figure 2-6. Wireless Hub Antenna Service Area
Transmitter Horizon
+30 Deg.
-30 Deg
80 Meter Radius
NOTE:
Building construction can affect these parameters.
FreeLink.Ch2.fixed Page 5 Wednesday, April 19, 2000 3:59 PM