Hi, what Jeon writes is correct so far, but two comments: > You can check XCVR2450's dsp rate
XCVR2450 is your daughterboard, not your USRP. The mainboard has a master clock rate. 100M is a good example, because it's the MCR of the USRP N2x0. > But in case of LFTX, LFRX, it is 200k. As explained above, it's not a feature of the daughterboard, but of your USRP. My assumption would be the minimum rate for you is 100M/512 = 192.something kHz And as Jeon pointed out, you should see a warning on the console, saying which sampling rate was actually used. Now, I'm not quite sure what tools you're using that use the uhd_interface.uhd_transmitter and uhd_interface.uhd_receiver, but if it's one of the benchmark_* scripts, you will need to adjust symbol rate or samples_per_symbol, or likely both, to yield a valid sampling rate. Best regards, Marcus On 30.08.2015 23:42, Jeon wrote: > Note before the text: my answer might have some incorrect terminologies. > > I am unable to know how to set the sample rate and sps for my device. > > > 1. DSP rate should be an integer multiple of sampling rate > > You can check XCVR2450's dsp rate by `uhd_usrp_probe` command. Let's > say it is 100M (not a true value!) > If you set sampling rate to 30k, 100M/30k = 3.333k, not an integer > > 2. There is some lower limit of sampling rate > > Since I've never used XCVR2450, I don't know the exact value of it. > But in case of LFTX, LFRX, it is 200k. > If 50k that you've set is below such lower limit, you can see warning > message on the console. > > Regards, > Jeon. > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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