#acl FriedemannBunjes:read,write,delete,revert All:read
#format wiki
#language en
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= the eyetracker calibration is not working =

 * First of all, check if the eyetracker produces a correct signal:
  * Video eyetracker:
   * Is the image of good quality?
   * Is the eyetracker software able to fit the pupil correctly?
   * Do you see an eye position trace for all relevant gaze directions?
 * Is the voltage of the adjusted eye, produced by the eyetracker, connected to the eye X/Y connectors of the nrec data acquisition box?
 * Is nrec getting any valid data? Try to activate "raw data" below the eye position panel to display the acquired voltages.
 * Did you select the menu entry {{{nrec - reset calibration}}} before starting the calibration experiment?