Regardless of whether you use the stock FPGA design or a custom one to do raw data capture you are going to run up against the basic limits of 1GB/s i.e 1Gb/S = 125MB/S = 62.5M 16bit samples/S
The stock image is always going to want to send an I and Q channel, and has the option of either 25MSamples/S @ 16bit or 50MSample/S @ 8bits and it's going to pass the data through either 1 or 2 low pass FIR filters to decimate to that data rate. Even if you write a very custom FPGA design that packs 14bit data efficiently and uses a raw UDP transport, you would be doing well to achieve 70MSample @14bits over ethernet since real world performance never quite matches theoretical. Interesting project though, the USRP could definitely be a useful generalized scientific data capture device. -ian On Jun 22, 2013, at 8:11 PM, n...@gu.pe wrote: > I'm looking at using USRPs for data acquisition in a physics project using an > LFRX. > Rather than for more typical SDR applications. I'd be interested in hearing > from > anyone who's done this. > > At first however I was wondering if this application sounds feasible, is it > crazy to > use the USRP for non-SDR applications? Are their other better suited devices? > > I'd like to use it to replace this product: > http://sine.ni.com/nips/cds/view/p/lang/en/nid/209713 > And possibly eventually integrate into our own PCB, I guess the n200 is still > mostly open hard/software? > > So real rather than IQ data I guess. I'd like to samples at 100MS/s 14bit, > and stream it > over the network, would this require changing the FPGA code? > > I've pinged a few people off list, so apologies if this is a duplicate, I'll > post here > if I receive a reply. > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
