I am currently using an iSCAN ETL 200 to track eye movements with a task in Psychtoolbox-3. There is a signal shown in the Psychtoolbox control screen, as well as a signal shown in the iSCAN program. However, I am confused about how to calibrate the eye signal with the Psychtoolbox. I use the Psychtoolbox calibration with the 3x3 blue dot calibration. I was wondering if there are any guides or manuals that are out there to help me with setting up an iSCAN with Psychtoolbox.