[Elecraft] FSK D transmit

[Jim Rhodes]

OK, I have done some fat fingered thing to my K3. For years I have been
running RTTY in FSK D mode. All of a sudden, right before Field Day of
course, it decides that it will not transmit in that mode. Not using PTT
over com port, direct using my home made interfaces I have been using for
years or even pressing the XMIT button on the front panel. When I press
XMIT the VFO B display says "N/A". All other modes seem to be fine
including AFSK A and DATA A. So something tells me this has to be operator
error, but I don't remember changing anything. Does anyone have an idea
what I did?