Hi everyone, first time posting on here. This question may have been answered in the past, I'm not too sure, but I couldn't find a clear answer. I've always wanted to get RTTY set up right, and so far I have been using AFSK configured on FLDigi. However, I've always wanted to try true FSK keying. I know the radio has an FSK mode built into it to narrow the passband for FSK, but I wanted to know how I could interface it to my computer for keying it. I already have a simple USB line running for cat control and audio. I also have a USB to Serial COM port for CW keying through N1MM. Has anyone ever done this before without buying a Rigblaster or Signalink? Thank you.