On Wed, 2006-08-09 at 15:26 +0200, Vincenzo Pellegrini wrote: > thanks Eric, thanks Lee. > > octave import function worked straightforward, and was actually very > useful. > > I still have some doubts about the 8bit samples. > > I have tried the usrp_fft.py, but when I do require 8bit samples through > the provided command line option, the fft sink displays nothing at all, > even if the applications seems to be running all right. > the same happens when I import the python code for 8bit conversion into > my scripts. any hint?
Turn the gain up. The 8-bit samples are formed by sending only the 8 most significant bits of the 16-bit samples. So, if your signal is too small, it will be dropped. With a 50 Ohm load on the Tx/Rx port of my RFX-2400, I get no signal when the gain is at or below 53 dB. The noise floor appears when the gain is set to a value greater than 53 dB. -Lee _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
