Error: No Optilink Head Found; Eyelink Data Storage; Customizing Your Physical.ini Settings - SR Research EyeLink 1000 Installation Manual

ERROR: no sync found!
AQ_STOP: Aborting acquisition

8.2.5 Error: No Optilink head found.

The following error is only seen when a fiber optic camera is used.
Found Optilink CL base, serial number CL1-*****
ERROR: No Optilink head found: check link or power
ERROR: EyeLink 1000 mode selected but hardware not operational:
Use the -x option to run in simulation mode.
Check the power for the Fiber Optic Camera Head and ensure all fiber optic cable
connections are secure.
8.3

EyeLink Data Storage

All EDF files that are created during the recording phase of each experiment will be saved to
C:\ELCL\DATA. This is the default directory into which EyeLink recording files (.EDF) are
stored. If the DATA drive cannot be found, all EyeLink data files will be saved into the
C:\ELCL\EXE directory. It is recommended to periodically boot into the Windows operating
system to back up your data.
8.4

Customizing Your PHYSICAL.INI Settings

The EyeLink 1000 PHYSICAL.INI file at C:\ELCL\EXE directory contains settings that tell the
system about physical characteristics of your setup that are important for proper visual angle
and eye velocity calculations. Any time you change your physical configuration (for example a
new monitor is used, the eye-to-screen viewing distance is changed, etc.) you should verify that
the PHYSICAL.INI still accurately reflects your setup.
The parameters in the PHYSICAL.INI file that change depending on the physical setup of your
system are:
screen_phys_coords – specifies the physical distance of the four edges of the presentation
surface to the center of the screen. The order of these measurements is left, top, right, bottom
and are specified in millimeters. For the default case of a 19" monitor this parameter will read.
screen_phys_coords = -188.0, 146.0, 188.0, -146.0
screen_pixel_coords – specifies the resolution of the display surface. Normally the EyeLink
1000 API at the start of an experiment programmatically adjusts this so you do not need to
manually change this setting. If the EyeLink 1000 programming API or Experiment Builder is
not being used, then the default value for this parameter will apply. The default value reads.
68 Testing the Host PC Installation
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