Elpro Technologies 450U-E Wireless Ethernet Modem & Device Server User Manual
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Rev Version 1.0.12-Beta7
attempt, TX retries and TX Ack messages from below.
All RX Frames
All data frames received by the radio being monitored. This is the default for chart two
and will display only received Elpro data frames.
TX First Attempt Messages
The amount of time spent transmitting first attempt messages from the modem. This
option and the following two are useful for breaking down the amount of time that is
spent transmitting messages into normal transmissions, retries and acknowledgements.
TX Retries
The percentage of time spent transmitting retry messages from the modem.
TX Acknowledge messages
The percentage of time spent transmitting acknowledgment messages from the modem
and Broadcast messages.
Radio Hold off
The percentage of time that the radio has spent holding off from transmitting data,
possibly because the channel is busy.
RX to this radio
The percentage of time receiving messages specifically for the radio being monitored, i.e.
valid Elpro radio communication frames from other modems in the system that are
specifically addressed to this modem.
RX to other radios
The percentage of time receiving valid Elpro messages addressed to other radios within
the system.
RX acknowledgements
The percentage of time receiving acknowledge messages
RX Errors
The percentage of time dealing with Elpro radio receive error messages, i.e. corrupted
data, Data Collisions, etc.
By configuring the different chart options from above we can get a clear idea of the percentage of time spent handling
transmit and receive messages and/or the amount of other receive data that can be heard at the radio.
Configure what is to be logged from the drop down list, select a time interval,
hanges and the charts will
then redraw the graphs and display below the settings. Each graph will display a percent channel utilisation using the
selected criteria and time interval (Seconds, Minutes or Hours).
Example One.
Chart one show all transmit data frames over the radio link and chart two shows Rx valid Elpro data frames being
received from any sources (Any Elpro 450U-E data frames). We can see from this that there is a large amount of Transmit
data being sent toward the end of the chart and the receive data in chart two also shows an increase in traffic. From this
we can deduce that the radio itself or a device on the Ethernet network it transmitting large amounts of data.
Figure 68 - Custom Survey 1