Apple Cinema Tools 4 - Manual (Page 103)

If you used serial device control, the timecode mismatch may have happened because
you didn’t set the appropriate timecode offset in Final Cut Pro for the specific deck you
used. You need to make this setting once per deck, per computer. For more information,
see the section about calibrating the timecode signal in the Final Cut Pro documentation.
7 If you entered new numbers in the fields, click Save. Otherwise, if the values were already
correct, close the window.
103 Chapter 6 Entering and Modifying Database Information