Yep, what they said. You need LTC (SMPTE) to provide your positional information. This would come from the Sync HD or I/O. A clock reference could come from a blackburst generator (most commonly), and your transport control could be handled by machine control.
...Or you could convert the video to quicktime and import it into your session.
Specifically though, if you have all that in place, The type (framerate) that is generated as well as the clocking information can be found under the Session Setup window (Command + 2). In that same window, check "using sync" under the "generate timecode" section.