Thanks Matt. And how does the FPGA scaling with set_tx_scale_iq() work? 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 >
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