Honeywell XYR301E, Руководство пользователя

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XYR301E Wireless Ethernet User Manual
Page 44 April 2012
Bursting
Selecting this option can increase the data throughput by reducing the overheads
associated with wireless transmissions.
Enable Iperf Server
Enable Iperf Server function in the modem. Iperf is used for performing Radio surveys
or radio path testing. See section 4.5
―
Throughput Test
Fixed Noise Floor Allows the Radio Receiver Noise Floor (and therefore sensitivity) to be moved above
any interference. What this will do is essentially stop the radio communicating with
devices with lower signal strength. For use in areas where there is a greater amount of
interference
Fixed Noise Floor
900MHz FHSS band can have many sources of interference. This interference can sometimes be a problem due to the
way 802.11 devices communicate. Standard 802.11 communications uses a system called
―
Clear Channel Assessment
which means the radio will listen before transmission and if the channel is busy it will hold off regardless of the level
of signal. If the background interference is high due to other radio systems or noise you can raise the Fixed Noise floor
to compensate. The Channel Utilisation page can be used to identify excess noise / interference. Raising the Noise
Floor will block out any receive signal levels below the value configured under
―
Fixed Noise Floor
―
on the
Advanced Radio Configuration page? The value must be entered as a negative dBm number and should be at least 8dB
greater than the weakest RSSI of any connected modems, otherwise communications may be lost. E.g if the interfering
noise levels are around -80 dB you can raise the Noise floor to -70dB to block out any signals below making sure the
RSSI levels of any connected modules are not below this Noise Floor as they will not communicate. The Connectivity
page can be used to determine what other systems are around and what their RSSI levels are. After configuring the
fixed noise floor, confirm that the Channel Utilisation has dropped to a desirable level, and where possible perform an
iperf Throughput Test to confirm acceptable performance