On Mon, Apr 21, 2008 at 6:16 PM, Johnathan Corgan <[EMAIL PROTECTED]> wrote: > The "full scale" output to the RFX boards is +-32767.0. It is not > recommended that you actually use this, as it will drive the RFX > output stages into a strongly non-linear operating range, increasing > noise and spurious signals significantly. From empirical > measurements, the RFX boards can only get to about 15% full scale > before they go into gain compression. That would be about +-5000 into > usrp.sink_c.
Just for the knowledge of the list and to better understand the hardware, in the application defined by the original poster a constant envelope GMSK signal is being used. With that being said: a) Should the compression of the output stages really affect his constant envelope GMSK signal? b) Is there any future enhancement scheduled to feed the daughterboard a normalized signal with a "backoff" in dB which will try to ensure linearity? The answer to (a) is just for my own curiosity whereas the answer to (b) might be helpful for people investigating OFDM, or M-QAM signals where the PAPR might be upwards of 10 to 12 dB. Brian _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
