Tommy,
Simple answer (which has been offered several times here – check archives for more) is that “fractional” speeds like 23.97 and 59.95 always apply in American and other 60 Hz & NTSC countries, while 60 only applies when shooting 25/50fps for PAL countries. It has to do with NTSC convention adopted to include color burst in the signal when the broadcast world adopted color many years ago. The wrong setting will confound sound sync and cause you untold agony, expense and aggrevation!
In the Varicam it’s set as systems frequency on the “Options” page. To repeat; always use 59.94 unless you’re shooting 25p or 50p (i) for PAL broadcast.
JS