I am brand new to digital modes. So far just playing with PSK 31 and a little Olivia. I seem to have found the common PSK 31 freqs with the exception of 80 meters. As i understand it it's USB but 3.580 like DM 780 leads me to does not decode there. I tried going either side of 3.580 but I cannot get it to decode. Any suggestions for a new guy?