3.9 Wireless Network Deployment and Troubleshooting
Ubee Interactive
54
DDW3612 Subscriber User Guide • July, 2010
Formula
:
(Transmit Power,
use -30dBm
)
–
(Receiver Sensitivity,
use RSSI value
)
=
Allowable Free Space Loss
Allowable Free Space Loss
÷
Materials Attenuation Value
=
Optimal Distance
in Feet Between the Cable Modem and a Wireless Client
Example
:
(-30dBm)
-
(-67dBm)
=
37dBm (allowable free space loss for a 54Mbps
connection)
37dBm
÷
.24db/foot (for open space)
=
154.16 feet
6. Once you know the optimal feet distance between individual wireless clients and
the wireless cable modem, you can resolve and prevent some performance issues.
7. To check the wireless signal strength and speed, use the following steps for a
Windows computer connected wirelessly to the wireless cable modem. If the
wireless computer is not connected, refer to “Connect/Validate Wireless Clients”
on
page 10
.
Double-click the Wireless networking icon in the system tray.
Review the speed and signal strength in the Status window.
