Hi!
On 18.10.2016 23:00, Aldalbahi, Adel wrote: > > 00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network > Connection (rev 04) > Subsystem: Dell Device 052c > Flags: bus master, fast devsel, latency 0, IRQ 29 > Memory at f7d00000 (32-bit, non-prefetchable) [size=128K] > Memory at f7d39000 (32-bit, non-prefetchable) [size=4K] > I/O ports at f080 [size=32] > Capabilities: <access denied> > Kernel driver in use: e1000e > Uh-oh. You've got the only malfunctioning Intel gigabit ethernet controller known to mankind :( It is known to drop packets sometimes. You must use a different one :( > > Marcus, > when I unplug the RX dautherboread from the USRP or block the > photodetector and run the flow graph i get the same BER mentioned > above i.e 0.007... how can this be possible even if there is nothing > at receiver to compare with? I totally agree with you there is no > perfect results in real world but I think the BER block should react > at least when blocking path. do you still agree with me that there is > something wrong with the flow graph and not the network? No. The network is 100% broken when you see a single "D". I don't know about the BER sink, this might be a separate issue, but as long as packets are dropped, every effort on your side to optimize transmission is in vain. Best regards, Marcus
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