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Broadcast IP Systems
Lancaster Court |8 Barnes Wallis Road|Fareham|Hampshire|PO15 5TU|UK
Tel:
+44 (0)1376 390647
www.broadcastipsystems.com
The command line
iperf –u –p 1234 –c <destination ip address> –b 10M
does the following
-u sets UDP mode
-p 1234 sets a port to use (this could be anything but has to match on client and server)
-c <ip address of server>
-b 10M sets 10Mbit/s transfer
You should now see data being received on the ‘receive’ computer, with a report of the
actual transfer rate in Mbps.
LOADING AN OPTION FILE
Having the correct option file is crucial for successful operation; they tell the modem the
correct TX & RX parameters for the particular satellite channel and also provide location
information, which is crucial, as the iDirect system relies on each modem in the network
having its own individual time-slot as to when it is able to transmit. The timing of each slot is
extremely critical and the path length of the signal from the earth’s surface has a significant
impact, hence each modem must know its exact position on the Earth’s surface for the system
to function correctly. If the information is wrong, a mis-match in signal timing will occur and
the modem will not be allowed to transmit.
There are two types of option file: