On Mon, Jul 27, 2009 at 7:06 AM, Johnathan Corgan < jcor...@corganenterprises.com> wrote:
> On Mon, Jul 27, 2009 at 06:28, Dimitris Symeonidis<azim...@gmail.com> > wrote: > > > Do we even need timestamps, or are the samples aligned (interleaved) > > anyway, even with the standard FPGA image? We don't care about > > absolute time, just time (phase) difference between the two channels. > > With the standard image, if you've set the mux and number of channels > appropriately, then the interleaved channels are coherently sampled > (assuming you are using daughterboards with coherent local > oscillators.) > > Regarding the inband code, this has become unmaintained; we've already > removed it on our 3.3 development trunk. The host code will get > rewritten using the 3.3 message passing architecture. The FPGA code > has issues (as you've noted), and I think there are some patches > floating around that fix some of them, but haven't gotten integrated. > Eric might have a better handle on this. > You can try some firmwares that Eric Schneider built in an attempt to fix the timestamps with 2 channels: http://www.schneider-group.com/gnuradio/r9581-ets-inband_2rxhb_2tx.zip Search for his name on the list archives and you'll find the discussion. - George
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