I made tests with the bladeRF at 30 MHz bandwidth, and I was able to see the spectrum just fine, not matter if I used a USB2 or a USB3 cable. No hacks, no switching chunks of the spectrum, just using a standard receiver program. The lost samples are not a problem as longs as you do not want to listen in.
Ralph. From: discuss-gnuradio-bounces+ralph=schmid....@gnu.org [mailto:discuss-gnuradio-bounces+ralph=schmid....@gnu.org] On Behalf Of Jorge Gallo Sent: Thursday, January 29, 2015 4:07 PM To: Martin Braun Cc: GNURadio Discussion List Subject: Re: [Discuss-gnuradio] USRP B200 host BW with USB 3.0/2.0 Martin, The alternative of a USB 3.0 is not having 5 USRPs. It is just reading 5 times at different centrer frequencies in order to get 40MHz information although that information will not be gathered at the same time. For my application I just need to "see" the sprectrum. I do not need to demodulate data so that it would be fine to proceed that way. However i would rather get 40MHz in a row. Many thanks, Jorge On 29 January 2015 at 14:07, Martin Braun <martin.br...@ettus.com <mailto:martin.br...@ettus.com> > wrote: On 01/29/2015 01:48 PM, Jorge Gallo wrote: > I understand the given values of host bandwidth for each protocol: > > USB 2.0 8 (MS/s @ 16-bit I/Q) If you go down to 8-bit I&Q, you will get twice that amount, if that's any help. > USB 3.0 61.44 (MS/s @ 16-bit I/Q) > > > > However I would like to process 40MHz of analogue BW in GNURadio over > USB 2.0 > > > I fully understand a continuous reception is not possible to manage > since it would require 40 IQ MS/s and I am limited to 8MS/s. > > > > However, is it possible to take snapshots of 40MHz over the time so that > I am able to receive bits of 40MHz with USB 2.0 which are not continuous > in time? > > Are there buffers in the FPGA that manage this kind of operation? None big enough for anything useful. It seems like attaching a USB3.0 connector would be simpler than running 5 USRPs? Not that I would complain about the sales :) M _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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