On Tue, Aug 16, 2011 at 8:38 PM, Marcus D. Leech <mle...@ripnet.com> wrote:
> ** > On 08/16/2011 11:32 PM, Page Jack wrote: > > my USRP N200 sometimes receive data wrong, I don't know where is the > problem in my application or > in hardware? So I wonder what ethernet protocol does usrp use and is it > reliable to transmit data? > > Regards! > > > Do you mean samples are received incorrectly, or your high-level data > packets are received incorrectly. > > The transport protocol used is based on UDP, which has no inherent > error-recovery mechanism, but > when carried over a local ethernet connection, should have a > vanishingly-tiny error rate. Vastly more > likely that UHD-level UDP packets will get dropped due to buffer resource > issues than actual data > errors on the packets. > > Keep in mind that what UHD "carries" is just samples of an analog > phenomenon. While it carries those > samples quite faithfully, the samples themselves may be distorted in many > different ways that affect > their "fidelity". > > > > > -- > Principal Investigator > Shirleys Bay Radio Astronomy Consortiumhttp://www.sbrac.org > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > The ethernet card should through out any ethernet frames that do not pass a check sum. So you should not receive any frames with errors. --Colby
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