The easiest way to do this is to interpolate the position data to give the same effect as a longer time interval. For example if you need an effective update of 200ms, then you can set the card to 50 ms and upsample the position data by a factor of 4. This will achieve the same effect as controuring through the original coordinates at 200ms. A simple linear interpolation would probably give good results and a spline would be even better.
Regards,
Brent R.
Applications Engineer
National Instruments