title: LabVIEW Real-Time Timed Loop resolution
body: <p>we are using LabVIEW Real-Time with the PXI-8110 Controller.
  I am facing the following problem:
  I have a loop with 500µs period time (time-loop) and no other task. I write the time each loop iteration into ram and then save the data afterwords.
  It is necessary that the period is exact, but I see that it is 500µs with +/- 25 µs.
  The clock for the timed loop is 1 MHz.</p>
  
  <p>How is it possible to have 500µs - 25µs. I would understand if I get 500µs + xx µs when my compution is to heavy. But till now I just do an addition nothing more.</p>
  
  <p>So does anyone have a clue what is going wrong?
  I thought it would be possible to have resolution of 1µs as NI advertise (if the computation isn't so heavy).</p>
  
  <p>Thanks.</p>