User's Manual

Elpro Technologies 450U-E Wireless Ethernet Modem & Device Server User Manual
58 www.cooperbussmann.com/wirelessresources Rev Version 1.0.12-Beta7
Diagnosing Low Throughput:
If normal communications between modems is poor, Channel Utilisation can be used to confirm whether or not the poor
results were due to interference. If the Channel Utilisation is seen to be high, then this will confirm that poor throughput
was due to other RF interference. Alternatively if the Channel Utilisation is seen to be low (indicating little interference),
then the poor throughput would more likely be attributed to poor RSSI - which could be confirmed on the Connectivity
page.
Channel Utilisation Graphs:
Channel Survey screen displays a graph showing the percentage of time that a channel is being utilised by any of the
following causes:
1. The connected modem is transmitting.
2. The connected modem is receiving valid data from other modems.
3. The connected modem has detected RF noise or interference from some other source.
Channel Survey shows the Channel Utilisation and Noise Floor Graph with 1 second, 1 minute and 1 hour periods.
Figure 64 - Channel Utilization Seconds
The first screen shows a percent of the overall radio traffic on the channel that is currently being used.
Figure 65 Background Noise (Sec)
The next screen shot shows the radio background noise level for the last 60 seconds.