Here is a little written tutorial that I authored on how to upconvert SD to HD using the AJA Kona 3 capture card. I used this card extensively on my last show as we incorporated a lot of SD stock footage on our DVCPRO HD timeline. This card made the process rather easy. While my article is specific about how to get SD to DVCPRO HD, it illustrates the process and you can plug in any HD format FCP can handle, which is most.
We also used this card to output our shows…cross converting our DVCPRO HD 720p 23.98 timeline to 1080psf 23.98 on HDCAM…in real time as we output.