Re: [Discuss-gnuradio] High packet loss problem (samples dropped?) and fusb parameters

[Matt Ettus]

George Nychis wrote:
> Maybe we can bring this thread up one more time.  Michael found me on 
> campus and I've been trying to help with this.
>
> We're attempting to use the 802.15.4 (OQPSK) blocks that a UCLA 
> wireless group wrote, available here:
> http://acert.ir.bbn.com/projects/gr-ucla/
>
> Using file source/sinks, we can successfully encode/decode packets 
> with absolutely no packet loss.  As soon as we connect the blocks with 
> the USRP, we experience relatively high packet loss (~2%) using coax 
> (very high SNR, low noise).  I would expect 0% packet loss, as I see 
> using every single other modulation scheme in GNU Radio with 
> benchmark_tx/rx.
>
> We are generating absolutely no overrun/underrun between the 
> transmitter and receiver, so I'm not exactly sure what could be the 
> problem here.
>
> Any other ideas?

Does the code do frequency offset correction?  What about timing?

Matt