ALink-5801a
Wireless LAN Outdoor Bridge
ALCON Telecommunications Co., Ltd.
26
Note:
In order to maximize the system performance, it is recommended
to follow the following suggestions.
For
Master Bridge
, it is recommended to set data rate into “best” on
Master Bridge to communicate with Slave Bridges of different distance
and signal strength.
For
Slave Bridge
, it is recommended to check or predict the received
signal strength at the Slave Bridge, and pick a supported data rate
according to the following table.
Note
:
3 to 5dB
additional margin is
recommended to maintain a reliable link.
Basic
Mode
Modulation Data
Rate
(Mbps)
Minimum
RX Sensitivity
BPSK 6
-88
BPSK 9
-87
QPSK 12
-86
QPSK 18
-84
16QAM 24
-81
16QAM 36
-76
64QAM 48
-72
64QAM 54
-68
Table 1 5GHz RX Sensitivity VS. Data Rate
7)
Transmit Power
Available selection of Transmit Power are Full, Half (-3dB),
Quarter (-6dB), Eighth (-9dB), and Minimum. Select the appropriate Transmit
Power according to the distance and environmental factor between Bridges.
8)
RTS/CTS Threshold
In order to prevent the transmission collision in a hidden
nodes environment, Bridge may send a RTS (Request To Send) before
transmitting the data frame and expect to receive a CTS (Clear To Send) from
remote Bridge. You may define a threshold for those frame size greater than
the threshold need to activate RTS/CTS mechanism. The valid range is
between 256 and 2346. Set low value to this threshold may avoid collision, but
