K3BU at aol.com wrote: > Now on K2 waveform, there seems to be a magic: dit is generated before the > key is closed? Talking about "smart" rig? :-) Not really, the key is closed when upper trace is low, therefore RF is delayed ~21 ms for the first dit, and ~16 ms for the second. 73, Sinisa Yt1NT, VA3TTN