Modes Of Operation - SR Research EyeLink Portable Duo User Manual

on the lower-left corner of the Setup screen. The latest Host software can be
downloaded from the SR Research support website
and can be installed using the System Update tool (see instructions in Section
5.1 "Host Software Update" of the EyeLink Portable Duo Installation Guide).
From the Web UI, the Host Application can be started by clicking on the tracker
icon ( ) from either the File Manager or the Configuration tool. To close the
Host Application, press the Ctrl+Alt+Q key combination on the Host PC
keyboard, or go to the Setup screen, click on the "Exit" button, and choose the
"Exit" option. To turn off the Host PC, click the "Shutdown" button on the Web
UI.
If the eye tracker fails to start, please watch closely for the error message that is
displayed. The complete error message is written to the eye.log file in the
"\elcl\data" folder and is retrievable through the File Manager. Consult section
"5.2 Troubleshooting Instructions" of the EyeLink Portable Duo Installation
Guide for common troubleshooting tips. Click on the tracker icon on the File
Manager to restart the Host Application. If the problem persists, please contact
support@sr-research.com.

2.3 Modes of Operation

The EyeLink Host Software is designed to be used in two different operating
modes:
Link: In Link mode, the eye tracker can be controlled by the Display PC via
commands sent over the Ethernet link. The degree of Display PC control is
dependent only on the display application itself. With appropriate programming,
it is possible to have full control of the tracker via the Display PC. SR Research
Experiment Builder software and various other programming interfaces have
been designed to facilitate interacting with the Host PC. A common scenario is
to have the application on the Display PC send commands to the Host PC/eye
tracker to start participant setup and calibration, while the
operator/experimenter can use the EyeLink Host PC's keyboard to remotely
monitor and control data collection, perform drift correction, and handle
problems if they occur.
Standalone: In Standalone mode, the Host PC/eye tracker acts as an
independent system, controlled by the operator via the Host Application tracker
interface and keyboard. In such a setup the Host PC may still be connected to a
display-generating computer for the purpose of displaying calibration targets
only. There are two possible data output modes when running the EyeLink
Portable Duo as a standalone system. These output modes are not mutually
exclusive:
18 EyeLink Portable Duo Host Software
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