JALLON Pierre 201932 wrote: > Dear all, > > > > According the USRP v4 description: > > http://www.ettus.com/downloads/usrp_v4.pdf > <http://www.ettus.com/downloads/usrp_v4.pdf> > > the usrp is able to process signals up to 16MHz. > > > > As the USB port is limited to 60MB/s, and if the samples are coded on 32 > bits (16 for Q and 16 for I), the maximal bandwidth equals 15MHz. The USRP can code signals as 32 bits (16 for Q and 16 for I) In this case the usrp is able to process signals up to 8 MHz. The USRP can also code signals as 16 bits (8 for Q and 8 for I) In that case the usrp is able to process signals up to 16 MHz. > > > > Which version is correct? > > > > Furthermore, considering that the first ADC works at 64Ms/s, the > available rate for the USB equals: > > 32/2 (is it available ?) > > 32/3 > > 32/4 > > 32/5 > > ... > > 32/256 > > > > Am I right ? the first ADC works at 64Ms/s, the available rate for the USB equals: 64/4 (64/4 is only available with halfband filter disabled) 64/8 64/12 64/16 64/20 ... 64/256
The halfband filter in the usrp firmware has a minimal decimation rate of 8. That is why 64/4 is only available with halfband disabled. Martin > > > > Thank you for your answers, > > > > Pierre Jallon > > > > > ------------------------------------------------------------------------ > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
