On Wed, Sep 23, 2009 at 02:04:35PM +0200, hanwen wrote: > Thanks Matt. > And how does the FPGA scaling with set_tx_scale_iq() work?
Don't use it. It's a bug that we expose it. (It's a final scaling that the library may someday use.) Eric > 2009/9/22 Matt Ettus <[email protected]> > > > hanwen wrote: > > > >> Hi GRers, > >> > >> What is the scaling of USRP2 TX/RX samples for float and short type? I > >> noticed that the absolute values of received float complex samples of USRP2 > >> are below 1. I remeber in USRP the values are +/-several thousand at > >> maximum > >> which match the resolution of ADC/DAC. But how are the samples of USRP2 are > >> scaled? > >> I also noticed that in gnuradio/usrp2/host/apps/tx_samples.cc there is a > >> FPGA scaling using set_tx_scale_iq(). How does it work? > >> > > > > In the USRP1 we use +/- 32767 as the floating point range. In the USRP2 we > > use +/- 1.0 > > > > Matt > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
