Wireless Ethernet Bridge User Manual

Configuration Link Speed & Power Settings
Trango Broadband Wireless — Atlas5010 page 20
Link Speed & Power Settings
Users may change the radio’s over-the-air data rate and conducted output power using the speed an d power
commands. Keep in mind that the lower data rates offer higher receiver sensitivity and higher allowable
conducted RF power in the ISM band. The following table shows the relatio n between speed settings,
modulation scheme, receiver sensitivity, and allowable maximu m power settings for each band. The lowest
power setting for all bands in –4 d Bm.
Speed Setting
(over-the-air rate)
(Mbps)
Modulation
Scheme
Receiver
Sensitivity
(dB)
Max Power
ISM Band
(dBm)
6 BPSK -92 21
12 QPSK -87 19
18 QPSK -85 19
24 16QAM -84 18
36 16QAM -80 18
48 64QAM -75 17
54 64QAM -73 17
In this example the user sets the power to 19dBm and the speed to 24 Mbps:
#> power 19
Execution in progress...
.
19 dBm (-4..19)
Success.
#> speed 24
24 Mbps
Success.
#>
MU Autoscan Feature Description
This feature allows the RU to actively search all chann els and polarizations for its peer MU in the even t of a
disassociation. This feature is useful if the user frequently changes the channel/polarization of the MU . If enabled, the
autoscanmu rou tine in the RU performs a search for the peer MU by actively scanning all available channels and
polarizations.
Notes regarding the auto scanmu feature:
• The RU will not activate the autoscan process after first 60 second s of turning on opmode.
• The RU will start the auto scan process If RU loses asso ciation for more than 10 seconds,.
• The whole process will scan all available frequencies and polarizations in chann el tab les. The radio will spend
10 to 12 seconds for each frequency.
• For each freq uency, radio will survey b oth polarizations, H and V. It will record the following information:
• association
• average RSSI of receiving P5010M pack ets
• After scanning all available frequ encies in ch annel plan, the radio will select the chann el based on the strongest
average RSSI for receiving packets.
• If no channel is selected after completing the cycle, the process will start again.
Example:
#> autoscanmu on
Success.
#>