On 07/07/2010 09:05 AM, Garrett Wenger wrote:
Marcus, First of all, thanks for responding so quickly.I looked on the USRP2 faq and I did see that the DAC rate was listed as 400 MS/s, but later on in the faq it says: The FPGA talks to the DAC at 100 MS/s just like it talks to the ADC at 100 MS/s. The interpolation from 100 MS/s to 400 MS/s happens inside the DAC chip itself. Unless you are doing something fancy, you can think of the DAC as operating at 100 MS/s. If I am just misunderstanding that and I do need to use 400 MS/s as my DAC rate, is there some upper limit to what the samples per symbol value can be? Since interpolation has to be between 4 and 512, the lowest possible values that I could use to get a 10kbps would be 80 samples per symbol with 500 as my interpolation rate.
Do all sample rate calculations based on a 100 MS/s DAC, just like the ADC. So an interp rate on transmit of X will have the same sample rate as using decim rate X on receive.
Matt _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
