Alessandro, You may be over-driving the DAC, which will generate very bad IMD. You have to be careful when summing signals as the total floating point value must never exceed +/- 1.0. If you are summing two signals then set your sinusoid amplitude to 0.5. Summing 4 set it to 0.25.
Lou _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
