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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 and 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 relation between speed settings,
modulation scheme, receiver sensitivity, and allowable maximum power settings for each band. The lowest
power setting for all bands in –4 dBm.
Speed Setting
(over-the-air rate)
(Mbps)
Modulation
Scheme
Receiver
Sensitivity
(dB)
Max Power
High (ISM) Band
(dBm)
Max Power
Low (U-NII)
(dBm)
6 BPSK -92 21 7
12 QPSK -87 19 7
18 QPSK -85 19 7
24 16QAM -84 18 7
36 16QAM -80 18 7
48 64QAM -75 17 7
54 64QAM -73 17 7
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 channels and polarizations for its peer MU in the event of a
disassociation. This feature is useful if the user frequently changes the channel/polarization of the MU . If enabled, the
autoscanmu routine in the RU performs a search for the peer MU by actively scanning all available channels and
polarizations.
Notes regarding the autoscanmu feature:
• The RU will not activate the autoscan process after first 60 seconds of turning on opmode.
• The RU will start the auto scan process If RU loses association for more than 10 seconds,.
• The whole process will scan all available frequencies and polarizations in channel tables. The radio will spend
10 to 12 seconds for each frequency.
• For each frequency, radio will survey both polarizations, H and V. It will record the following information:
• association
• average RSSI of receiving P5010M packets
• After scanning all available frequencies in channel plan, the radio will select the channel 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.
#>