Hi Eric, I did some calculations and something doesn't add up. As I mentioned in my last email, I am using usrp.sink_s. Thus, my samples are real shorts (16 bit). I verified the buffer size by printing out the buffer allocation size in gnuradio-core/src/lib/runtime/gr_buffer.cc. The size is 32KB.
If I am using an interpolation factor of 400, then my sample rate should be 128M/400=320k and thus the USB speed should be 320k*2B=640kB/s. With this number, the estimated delay for a sample to pass through the buffer should be 32k/640k=0.05s. The problem is, that I measure about 28ms. I think I shouldn't complain, since in reality the system is faster than what I calculated. Though I still would like to understand what's going on ;) Thomas _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
