Weidmuller WI-MOD-945-E: 900Mhz Wireless Ethernet & Device Server v2.16 User Manual
Page 86
Weidmuller Wireless Ethernet Modem & Device Server WI-MOD-945-E User Manual
Page 86
www.weidmuller.com
Rev 2.136
that it has been enabled and the module has been reset. Each press of the “Measure Throughput” button will perform a
TCP throughput test of 10 second duration.
You will see the message “Performing Iperf Test” text and if you look at the modules you will see the TX/Link & RX Led’s
flashing very fast as it performs the test. Approximately 10 seconds later a graph showing the actual throughput over the
10 second period and a calculated average will be displayed.
The graph below shows the data throughput range between 8 and 14.5Mbits per second with an overall average of
10.9Mbits per second.
It is recommended to perform this throughput test a number of times to get better sample of the overall throughput.
Figure 72 - Iperf Throughput
The expected throughput will depend on a number of things, the distance setting, selected channel width, and whether
using the internal Iperf utility or running Iperf externally on a laptop or PC (at both ends of the link).
The following table shows the estimated throughput results based on real world communications. These estimates are not
necessarily the maximum that are achievable in the modems but are used more as a guideline to determine the
performance of the radio link.
The Iperf throughput result provides an excellent measure of the performance of a radio link. In general, if the results you
get are a lot worse than the best case values listed below, this is a certain indication that the radio link has either poor
RSSI, or high noise or interference, or both.
For RSSI or Received Signal Strength Indication see section 4.1 -
For information on checking interference or noise see section 4.2 - Channel Survey (Utilisation)
Distance
Setting
Iperf
Location
20MHz
Channel
10MHz
Channel
5MHz
Channel
1.25MHz
Channel
2.5MHz
Channel
1000m
Internal
10.5 Mbps 7.5 Mbps
5. Mbps
2.4 Mbps
1.4 Mbps
1000m
External
16. Mbps
10.5 Mbps 6. Mbps
2.8 Mbps
1.5 Mbps
3000m
Internal
10. Mbps
7. Mbps
4.7 Mbps
2.4 Mbps
1.4 Mbps
3000m
External
15. Mbps
9. Mbps
6. Mbps
2.7 Mbps
1.5 Mbps
5000m
Internal
9. Mbps
6. Mbps
4.5 Mbps
2.3 Mbps
1.4 Mbps
5000m
External
13. Mbps
8. Mbps
6. Mbps
2.6 Mbps
1.5 Mbps
10000m
Internal
7. Mbps
5. Mbps
4. Mbps
2.2 Mbps
1.3 Mbps
10000m
External
10. Mbps
7. Mbps
5. Mbps
2.4 Mbps
1.4 Mbps