I'm testing a URI on a server with a scope connected When I send audio to the URI (CLI> radio tune txvoice 500), PTT activates the red LED (scope confirms), and the scope responds to the LEFT_AC start and stop (ramped dc offset), but no tone. I've checked both channels. I'm wondering if I have something set incorrectly. What am I missing? Here are my tx settings. hdwtype=0 txboost=1 txctcssfreqs=107.2 txprelim=no txlimonly=no txtoctype=notone txmixa=composite txmixb=composite duplex=1 eeprom=0 Thanks, Bob kk6ecm