My advice would be to definetly do all the calculations outside of the loop.Also you will want to use double buffering if you can. I'm not sure if that card will do that or not.what the AI C scan uses is a circular buffer which means if you do not read the data fast enough then you will get buffer overuns and lose data.Try taking out the calc. and run it and see if that helps if not you will have to use the AI config AI start AI read and AI Stop VI's and set this up.If you can use DAQmx then try using the I/O assistant(labview 7.0 only) Sorry I cannot be of more assistance.
Joe
