SR Research EyeLink Portable Duo User manual

EyeLink
®
Portable Duo User Manual
Version 1.0.2
Copyright ©2016-2017, SR Research Ltd.
EyeLink is a registered trademark of SR Research Ltd.,
Mississauga, Ontario, Canada

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©2016-2017 SR Research Ltd.
SAFETY MARKINGS
Read instructions before use.
For indoor use only.
DC Power
Class II Equipment, no protective earth required
Separate electrical and electronic collection.
Intertek Safety Mark: Compliance of this product with applicable
standards is certified by Intertek, an independent testing agency.
SAFETY WARNINGS
WARNING: Do not open or modify the EyeLink Portable Duo eye tracker in any way.
This may render the unit unsafe, resulting in shock or burn hazards, and will void the
warranty and safety certifications. No user-serviceable parts inside - contact SR
Research for all repairs.
WARNING: The EyeLink Portable Duo is not intended for use in an oxygen-rich
environment, or in the presence of flammable anaesthetics.
WARNING: The Host PC, and all peripherals connected to it with cables, should be
positioned out of reach of the participant (at least 120 cm away). Only devices included
with the system and clearly identified as suitable for contact with the participant (such
as a response device) should be within the participant’s reach.
WARNING: The operator should avoid simultaneously contacting the participant and
the computer, or any device connected with cables to the Host PC, such as a keyboard
or mouse, that were not included with the system and clearly identified as suitable for
contact with the participant.
WARNING: If the USB cable outer jacket is damaged, a shock hazard to the participant
may exist. Remove the unit from service immediately if such damage is found.

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WARNING: Do not place any objects on top of the EyeLink Portable Duo that could
block air circulation around the unit. If the unit has been inadvertently covered during
operation, it could be hot! Uncover it immediately, turn off its power source and let it
cool, before touching it or allowing participants near it.
WARNING: This unit is drip-proof and spill-resistant; it is not watertight or waterproof.
Any exposure to substantial quantities of fluids carries risk of danger to participants.
Unit should be taken out of service IMMEDIATELY after immersion or substantial spill
onto unit, and should be returned for inspection and repairs.
WARNING: The EyeLink Portable Duo is always powered while the Host PC is connected
and powered on. Therefore observe these precautions for participant safety:
• Before performing any cleaning other than wiping the optical window, power off the
Host PC or disconnect both plugs of the USB cable of the eye tracker (see Chapters 5
and 6).
• Do not cover or place any items on top of the EyeLink Portable Duo while the Host
PC is powered on, unless the eye tracker cable is disconnected from both USB ports.
Operating the unit while covered could cause it to overheat and possibly cause a burn
hazard.
• If the EyeLink Portable Duo fails to operate properly, is running at a higher than
normal temperature, or if the cable is damaged / the illuminator is not glowing,
disconnect the USB cable or turn off the Host PC, until the operator can troubleshoot
the system.
WARNING: Use of this equipment adjacent to or stacked with other equipment should
be avoided because it could result in improper operation. If such an arrangement is
unavoidable, please make sure to check the data from all equipment to ensure that it is
operating normally.
WARNING: Changes or modifications not expressly approved by the manufacturer will
void the warranty and authority to operate the equipment. This includes modification of
cables or opening unit without express instructions from the manufacturer.
WARNING: Use of cables other than those specified or provided by the manufacturer of
this equipment could result in increased electromagnetic emissions or decreased
electromagnetic immunity of this equipment and result in improper operation.
WARNING: Portable RF communications equipment (including peripherals such as
antenna cables and external antennas) should be used no closer than 30 cm (12 inches)
to any part of the EyeLink Portable Duo, including cables specified by the
manufacturer. Otherwise, degradation of the performance of this equipment could
result.
WARNING: This equipment was not tested for degradation of performance during
immunity testing. If degradation of performance is observed that is unacceptable, check
for sources of interference that may be responsible.

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©2016-2017 SR Research Ltd.
CONTACT ADDRESS
SR Research Ltd
35 Beaufort Drive
Ottawa, Ontario, K2L 2B9
Canada
Fax:
[phone]
Phone:
[phone]
Toll Free:
1-866-821-0731 (North America only)
Email:
[e-mail]
Sales:
http://www.sr-research.com
Support:
http://www.sr-support.com

©2016-2017 SR Research Ltd.
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Table of Contents
1!Introduction................................................................................................................1!
1.1!EyeLink Portable Duo System Configuration ......................................... 2!
1.1.1!Eye Tracking Unit............................................................................................2!
1.1.2!Host PC...........................................................................................................3!
1.1.3!Display PC ......................................................................................................4!
1.2!Supporting Documents ......................................................................... 5!
1.3!System Specifications ........................................................................... 7!
1.3.1!Operational / Functional Specifications...........................................................7!
1.3.2!Physical Specifications....................................................................................8!
2!EyeLink Portable Duo Host Software ......................................................................9!
2.1!Web User Interface (Web UI).................................................................. 9!
2.1.1!File Manager ...................................................................................................9!
2.1.2!Configuration Tool.........................................................................................14!
2.1.3!Tracker Initialization Files..............................................................................15!
2.1.4!Running the Web UI on the Display PC........................................................17!
2.2!Starting the Host Application .............................................................. 17!
2.3!Modes of Operation ............................................................................. 18!
2.4!EyeLink Portable Duo Host Application Navigation .............................. 19!
2.4.1!Setup Screen ................................................................................................20!
2.4.2!Calibration Screen.........................................................................................27!
2.4.3!Validation Screen ..........................................................................................30!
2.4.4!Drift Check/Drift Correct Screen....................................................................32!
2.4.5!Record Screen ..............................................................................................34!
3!An EyeLink Portable Duo Tutorial: Running an Experiment...............................39!
3.1!The Setup Screen................................................................................ 40!
3.2!Participant Setup ................................................................................ 41!
3.2.1!Participant Setup in Head-Stabilized Mode ..................................................41!
3.2.2!Participant Setup in Remote Head-Free-to-Move Mode...............................45!
3.3!Setting Pupil Thresholds ..................................................................... 52!
3.4!Setting the Corneal Reflection (CR) Threshold ..................................... 54!
3.5!Search Limits...................................................................................... 55!
3.6!Pupil Tracking Algorithm .................................................................... 55!

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3.7!Calibration.......................................................................................... 56!
3.8!Validation ........................................................................................... 60!
3.9!Improving Calibration Quality ............................................................. 61!
3.10!Recording Gaze Position .................................................................... 63!
3.11!Drift Checking and Drift Correction................................................... 63!
3.11.1!Enabling Drift Correction.............................................................................64!
3.11.2!Online Drift Correction.................................................................................64!
3.12!Exiting the Host Application.............................................................. 66!
3.13!EyeLink Portable Duo Setup Summary.............................................. 66!
3.14!Experiment Practice .......................................................................... 67!
3.15!Next Steps: Other Sample Experiments ............................................. 67!
4!Data Files..................................................................................................................71!
4.1!File Contents ...................................................................................... 71!
4.2!Recording EDF Files............................................................................ 72!
4.2.1!Recording from the EyeLink Portable Duo Host PC .....................................72!
4.2.2!Recording from the EyeLink API or SR Research Experiment Builder .........72!
4.3!The EyeLink On-Line Parser................................................................ 72!
4.3.1!Parser Operation...........................................................................................72!
4.3.2!Parser Limitations .........................................................................................73!
4.3.3!EyeLink Parser Configuration .......................................................................73!
4.3.4!Parser Data Type ..........................................................................................74!
4.3.5!Saccadic Thresholds.....................................................................................74!
4.3.6!Pursuit Thresholds ........................................................................................75!
4.3.7!Fixation Updates ...........................................................................................75!
4.3.8!Other Parameters..........................................................................................76!
4.3.9!Sample Configurations..................................................................................76!
4.4!File Data Types ................................................................................... 77!
4.4.1!Samples ........................................................................................................77!
4.4.2!Position Data.................................................................................................78!
4.4.3!Pupil Size Data..............................................................................................80!
4.4.4!Button Data ...................................................................................................81!
4.5!Events ................................................................................................ 81!
4.5.1!Messages......................................................................................................81!
4.5.2!Buttons ..........................................................................................................82!

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4.5.3!Eye Movement Events ..................................................................................82!
4.6!Setting File Contents........................................................................... 86!
4.6.1!Sample Data .................................................................................................86!
4.6.2!Event Data ....................................................................................................87!
4.6.3!Event Types ..................................................................................................88!
4.7!EDF File Utilities................................................................................. 88!
4.8!Using ASC Files .................................................................................. 89!
4.9!The ASC File Format ........................................................................... 90!
4.9.1!ASC File Structure ........................................................................................90!
4.9.2!Sample Line Format......................................................................................91!
4.9.3!Event Line Formats.......................................................................................93!
4.9.4!Data-Specification Lines ...............................................................................96!
4.10!Processing ASC Files ......................................................................... 98!
5!System Care...........................................................................................................100!
5.1!Periodic Inspection............................................................................ 100!
5.2!Cleaning and Disinfection ................................................................. 101!
6!Important Information ...........................................................................................104!
6.1!Electrical Safety ................................................................................ 104!
6.1.1!Power Source and Isolation ........................................................................104!
6.1.2!Disconnection..............................................................................................105!
6.1.3!Maintaining Participant Isolation .................................................................105!
6.1.4!Exposure to Fluids and Spills......................................................................106!
6.2!Eye Illumination Safety ..................................................................... 107!
6.2.1!Eye Safety and Comfort..............................................................................107!
6.2.2!Visibility of Illuminator..................................................................................107!
6.2.3!Illuminator Warm-Up Period........................................................................107!
6.3!SERVICING INFORMATION............................................................... 107!
6.4!Electromagnetic Compliance and Immunity ...................................... 108!
6.4.1!Suitable Electromagnetic Environments .....................................................108!
6.4.2!Sources of Interference and Degraded Performance .................................109!
6.4.3!Preserving Electromagnetic Compatibility...................................................109!
6.4.4!Other Electromagnetic Compatibility Statements........................................110!
6.5!Limited Hardware Warranty .............................................................. 110!
6.6!Limited Software Warranty................................................................ 111!

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6.7!Copyrights / Trademarks .................................................................. 112!

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List of Figures
Figure 1-1: EyeLink Portable Duo Eye Tracker, Showing Internal Camera Lens
and Illuminator .......................................................................................... 2!
Figure 1-2. Example Use Scenarios (Left: Eye Tracker Mounted on Top of a
Tripod; Right: Eye Tracker Installed on a Laptop Mount)............................. 3!
Figure 2-1: File Manager Screen..................................................................... 10!
Figure 2-2: EyeLink Portable Duo Host PC Application Overview .................... 19!
Figure 2-3: Example Setup Screen ................................................................. 20!
Figure 2-4: Example Calibration Screen ......................................................... 27!
Figure 2-5: Example Validation Screen........................................................... 30!
Figure 2-6: Example Drift Check/Drift Correct Screen.................................... 33!
Figure 2-7: Example Record Screen (Gaze Cursor View).................................. 35!
Figure 2-8: Example Record Screen (Plot View) ............................................... 36!
Figure 3-1: Example Setup Screen ................................................................. 40!
Figure 3-2: Camera Setup with Participants Wearing Glasses......................... 44!
Figure 3-3: Focusing the Camera Image ......................................................... 45!
Figure 3-4: Setup Screen in the Remote Mode ................................................ 46!
Figure 3-5: EyeLink Remote Target Placement................................................ 49!
Figure 3-6: Pupil and CR Thresholds and Bias Values .................................... 50!
Figure 3-7: Symptoms of Poor Pupil Threshold ............................................... 53!
Figure 3-8: Potential Pupil Threshold Issues when Viewing Screen Corners .... 54!
Figure 3-9: Corneal Reflection ........................................................................ 54!
Figure 3-10: Calibration Grid ......................................................................... 58!

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List of Tables
Table 1: EyeLink Portable Duo Configuration Files ......................................... 17!
Table 2: Cleaning and Disinfecting Rules...................................................... 102!
Table 3: Approved Cleaning and Disinfecting Methods, Ordered by Risk ....... 103!

Introduction
©2016-2017 SR Research Ltd.
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1 Introduction
This section introduces the technical capabilities and supporting
documentation for the EyeLink Portable Duo eye tracker. The EyeLink Portable
Duo eye tracker is intended for researchers who require high-quality eye
tracking data both in and out of the laboratory. The eye tracker illuminates the
participant’s face and eyes with invisible near-infrared light; an internal USB
camera acquires up to 2000 images per second. The camera images are
processed by the attached Host PC to identify landmarks on the eyes and face,
allowing measurement of the participant’s gaze location.
The EyeLink Portable Duo, with IEC 60601-1 medical certification, meets the
requirements for use in medical environments (e.g., more stringent electrical
isolation, easier cleaning, etc.). These goals are met by adopting a unitary
design with a simple enclosure, and with no exposed parts such as lenses or
illuminator arrays. In addition to providing electrical isolation from internal
parts and cable entry protection, this enclosure also provides low thermal
resistance to keep the internal parts (especially the sensor) cool while radiating
sufficient heat to keep its temperature within safety requirements. The compact
design of the eye tracking unit makes the EyeLink Portable Duo easier to
transport and simpler to set up compared to other models of EyeLink eye
trackers.
Another unique design feature of the EyeLink Portable Duo is its built-in
capability for dual use as either a high-accuracy head-stabilized eye tracker or
as a head free-to-move remote eye tracker. By adopting a compact, yet highly
sensitive lens and illumination module, the EyeLink Portable Duo can operate
in two distinct modes with the same set of eye tracking hardware (i.e., no
change of lens or illumination module is required). The head-stabilized and
remote modes can be easily accessed through the Host Application, and share
the same application programming interface (API) and EyeLink Data File (EDF)
output. This allows experimenters to seamlessly switch between data collection
and analysis modes that best suit their particular experimental paradigm or to
accommodate different participant populations.
The EyeLink Portable Duo operates at an extremely low noise level, which is
required for accurate gaze-contingent paradigms, and which offers researchers
the high levels of data quality that careful research demands. EyeLink systems
are the only modern commercial eye-tracking equipment to run on a real-time
operating system; running on such an operating system ensures low temporal
variability and near-instant access to eye data measures. Compared to other
remote systems on the market, the EyeLink Portable Duo provides high-
accuracy eye tracking data with extremely low noise.

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Introduction
©2016-2017 SR Research Ltd.
A typical EyeLink Portable Duo setup consists of two computers – one, which is
called the Host PC, connects to the eye tracker and is dedicated to data
collection. The second computer is referred to as the Display PC, and is
generally used for the presentation of stimuli to a participant. The two
computers are connected via an Ethernet link that allows the transfer of critical
information between the two computers. This transfer allows the Display PC
access to the eye data, such as ongoing gaze position and saccade and fixation
events (which are being processed and recorded on the Host PC). It also allows
the transfer of camera images from the camera/Host PC to the Display PC
during participant setup. Similarly, the Display PC can send information to the
Host PC over that same Ethernet connection, allowing Display PC applications
to direct the collection of data and mark critical experimental events, such as
the onset of experimental stimuli, in the eye tracking data file. This message
passing also allows events collected by I/O devices on the Display PC (e.g.,
button boxes, microphones, etc.) to be marked in the data file.
IMPORTANT: Please examine the safety information for the EyeLink Portable
Duo system which can be found in Section 6.
1.1 EyeLink Portable Duo System Configuration
1.1.1 Eye Tracking Unit
Figure 1-1: EyeLink Portable Duo Eye Tracker,
Showing Internal Camera Lens and Illuminator
The EyeLink Portable Duo eye tracker comes with a high-speed USB camera (on
the left side of the unit) and an infrared illuminator (on the right side of the
ISOMETR IC VIEW
WINDOW R EMOVED
FR ONT VIEW
WINDOW R EMOVED
RIGHT VIEW
WITH C ABLE ENTRY

Introduction
©2016-2017 SR Research Ltd.
3
unit). The lens and illuminator components allow for a more compact enclosure,
while supplying the high light output and sensitivity required for fast sampling
rates and low noise levels. All image processing and data recording is handled
by a laptop or desktop Host PC, which connects to the eye tracker with a high-
speed USB 3.0 cable.
The eye tracking unit can be mounted on a tripod and sit below the display that
the participant views during the experiment. If a laptop is used as a Display
computer, a laptop mount option can be used so that eye tracking can be done
on the laptop screen. Since the EyeLink Portable Duo’s eye tracking unit is near
the stimulus display, no electronics need to be near the participant’s head. The
eye tracker can operate in either a head-stabilized mode (any head support can
be used) or in a head free-to-move Remote mode.
Figure 1-2. Example Use Scenarios (Left: Eye Tracker
Mounted on Top of a Tripod; Right: Eye Tracker
Installed on a Laptop Mount)
1.1.2 Host PC
The EyeLink Portable Duo Host PC performs real-time eye tracking at either up
to 2000 samples per second while computing the gaze position of the
participant on the Display PC’s monitor. The Host PC also performs on-line
detection and analysis of eye-motion events such as saccades, blinks, and
fixations. In addition to the sample data, these events are stored in a data file
on the Host PC. They can be sent via the Ethernet link to the Display PC with
minimal delay, or output as analog signals (if the optional analog/digital I/O
card is installed in a workstation Host PC). From the Host PC, the operator
performs participant setup and monitors the viewing position of the participant
during the experiment.

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Introduction
©2016-2017 SR Research Ltd.
The Host PC:
•Uses a timing-sensitive operating system which allows the eye tracker to
safeguard data acquisition and minimize delays in online data access, and
offer very low variability in the latency of this data access.
•Functions either as standalone eye tracker or as one controlled by a Display
PC when connected to that Display PC via Ethernet.
•Communicates with the EyeLink camera through USB 3.0 ports. A
workstation Host PC can also house an optional analog output/digital I/O
card.
•Integrates all the eye tracking functionality, including participant setup,
calibration, sending real-time data through an Ethernet link or optional
analog output card, and data recording.
•Can be configured remotely via commands sent over the Ethernet link from
the Display PC.
•Shows real-time feedback of eye data during calibration and data recording,
allowing the Display PC to be devoted to accurate stimulus delivery.
1.1.3 Display PC
The Display PC presents stimuli during experiments and, via the Ethernet Link,
can control key eye tracking functions such as calibration and data collection.
Online eye and gaze position can be received from the EyeLink Host PC via the
Ethernet link making gaze-contingent paradigms possible. Licenses can be
acquired from SR Research for Experiment Builder, a sophisticated program
that assists researchers in creating EyeLink experiments on Windows and Mac
OS X via a graphical user interface that eliminates the need for complex
scripting.
For users who wish to program their own experiments in other programming
environments, a wide range of options exist for accessing and controlling data
acquisition on the Display PC. A C/C++ programming API with example code
exists for Windows, Mac OS X, and Linux. Additionally, several programming
environments (e.g., Psychtoolbox for MATLAB, E-Prime, Presentation, Python,
LabView, and anything with access to the Windows Common Object Model
[COM] interface) have freely-available wrappers for this API, which allow you to
interface with the EyeLink system from these programming environments. For
full details and links to downloadable resources, visit and join the SR Research
support forums at http://www.sr-support.com.

Introduction
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The Display PC:
•Runs experiment presentation software to control presentation of the
experimental materials to the participant while interfacing with the
EyeLink eye tracker.
•Can configure and control the EyeLink tracker, and have access to real-
time data including gaze position, eye movement events, and response box
button presses with minimal delay and low variability in timing.
•Runs applications focused on stimulus generation and control of the
experiment sequence. Relying on the Host PC for data acquisition and
registering responses makes millisecond-accurate timing possible, even
when the Display PC is running under Windows.
•Supports data file viewing and conversion tools such as EyeLink Data
Viewer and EyeLink EDF2ASC converter, to assist researchers in analysis
of the data obtained.
1.2 Supporting Documents
The EyeLink Portable Duo User Manual (this document) contains information
on using the eye tracker hardware, the Host PC application, tutorials on
participant setup and calibration, and the basics of running an experiment.
Information on system safety and maintenance can also be found in Chapters 5
and 6 of this document.
Additional documents are also available:
•EyeLink Portable Duo Installation Guide – Describes a standard EyeLink
Portable Duo system layout as well as the steps required to install the
EyeLink Portable Duo hardware and software on both the Host and Display
PCs.
•EyeLink Programmer’s Guide – Provides suggestions on how to program
experiments with EyeLink Portable Duo in Windows, including a review of
sample experiments and documentation of supported functions.
•SR Research Experiment Builder User Manual – Introduces an optional
visual experiment creation tool for creating EyeLink experiments on 32-/64-
bit Windows and Mac OS X. This software allows for a wide range of
sophisticated experimental paradigms to be created by someone with little or
no programming or scripting experience.
•EyeLink Data Viewer User’s Manual – Introduces an optional data analysis
tool, EyeLink Data Viewer, which allows interactive display, filtering,
extraction and summarizing of EyeLink EDF data.

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Introduction
©2016-2017 SR Research Ltd.
NOTE: Please be sure to check http://www.sr-support.com for the latest
product and documentation updates.

Introduction
©2016-2017 SR Research Ltd.
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1.3 System Specifications
1.3.1 Operational / Functional Specifications
Head-stabilized Mode
Remote Mode
(Head free-to-move)
Average Accuracy1
Down to 0.15° (0.25° to 0.5° typical)
0.25-0.5° typical
Sampling rate
Monocular: 250,500,1000,2000 Hz
Binocular: 250,500,1000,2000 Hz
Monocular: 250,500,1000 Hz
Binocular: 250,500,1000 Hz
End-to-End Sample Delay2
1000 Hz: M=1.88 ms SD=0.36 ms
2000 Hz: M=1.34 ms SD=0.18 ms
500 Hz: M=3.21 ms SD=0.61 ms
1000 Hz: M=2.10 ms SD=0.37 ms
Blink/Occlusion Recovery
1.0 ms @ 1000 Hz
0.5 ms @ 2000 Hz
2.0 ms @ 500 Hz
1.0 ms @ 1000 Hz
Spatial Resolution3
0.01°
Noise with Participants4
Filter (Off/Normal/High):
1000 Hz: 0.03°/0.02°/0.01°
2000 Hz: 0.05°/0.03°/0.02°
Filter (Off/Normal/High):
500 Hz: 0.03°/0.02°/0.01°
1000 Hz: 0.05°/0.03°/0.01°
Eye Tracking Principle
Dark Pupil - Corneal Reflection
Pupil Detection Models
Centroid or Ellipse Fitting
Ellipse Fitting
Pupil Size Resolution4
0.1% of diameter
Gaze Tracking Range
Customizable – Default is 32 º horizontally ×25 º vertically
Allowed Head Movements
Without Accuracy Reduction
±25 mm horizontal or vertical
20 cm ×20 cm at 52 cm
Optimal Camera-Eye Distance
42 - 62 cm
Glasses Compatibility
Excellent
On-line Event Parsing
Fixation / Saccade / Blink / Fixation Update
EDF File and Link Data Types
Gaze, Raw, and HREF eye position data/ Pupil size / Online events /
Buttons / Messages / Digital inputs
Real-Time Operator Feedback
Eye position gaze cursor superimposed on static image or position
traces with camera images and tracking status.
Specifications are preliminary and subject to change without notice.
1Measured with real eye fixations at multiple screen positions on a per subject basis.
2Time from physical event until first registered sample is available via Ethernet or Analog output. Optional
data filter algorithm adds one sample delay for each filtering level.
3Measured with an artificial eye.
4Measured with real subject fixations.

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Introduction
©2016-2017 SR Research Ltd.
1.3.2 Physical Specifications
Physical
Anodized aluminum enclosure, acrylic optical window
Device Model
USB1000-880-WA
Focus Option
Focus adjustment wheel (installed)
Lens Option
25 mm lens
Water and Ingress
Rating
•IP21
•Drip-proof and spill-resistant
Dimensions
206.0mm W ×44.4mm H ×109.5mm D
Weight
930g w/o cable, 1050g including cable
Power Requirements
•5.0V, 1800 mA from USB 3.0 ports on Host PC
•Continuous Operation
Connection
2 meter USB 3.0 cable (data and power plugs), integrated with unit
Grounding
Class II (insulated, no protective earth required)
Computer
Requirements:
•Host computer supplied with the system
Internal Illuminator
•Eye exposure: less than 1 mW/cm²at > 300 mm from illuminator
•IEC 62471 compliant (Exempt device)
Operating conditions
•15°C to 25°C, 30%-75% humidity (non-condensing).
•0-2000 m (0-6500 ft) altitude (70-106 kPa)
•For indoor use only
•Not for use in oxygen-rich environments or in the presence of
flammable anesthetics
Storage and
Transportation
conditions
•-10°C to 60°C, 10%-90% humidity (non-condensing)
•0-2000 m (0-6500 ft) altitude. (70-106 kPa)
•Allow to warm to room temperature before use after storage at
temperatures below 10°C to prevent condensation
Isolation
Cable and enclosure insulated from USB power
Electromagnetic
compatibility
•FCC Part 15, Subpart B: Class B
•CISPR 11:-- Class B
•60601-1-2 Medical Device EMC Compatibility, Ed.3 (2007-03)
Certifications
IEC 60601-1 ed. 3., AAMI ES60601-1, CSA C22.2#60601-1 ed. 3.1, IEC
62366 ed. 1, ISO 15004-1, ed. 1, ISO 15004-2, IEC 62471 ed. 1, ISO
14971. ed. 2, IEC 60601-1-6 ed. 3.0, IEC 60601-1-2, ed. 4

EyeLink Portable Duo Host Software
©2016-2017 SR Research Ltd.
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2 EyeLink Portable Duo Host Software
This chapter covers the following topics:
•Web User Interface (Web UI)
•Starting the Host Application
•Modes of operation
•Basic tracker interface
2.1 Web User Interface (Web UI)
The Web User Interface (Web UI) is a tool supplied with the EyeLink Portable
Duo eye tracker that allows users to access files from the Host PC, configure
eye tracker settings, and perform Host software updates. This tool can be run
on both the Host PC and the Display PC. On the Host PC, you can access this
interface by simply pressing Ctrl+Alt+Q to exit the current eye tracking
session/Host PC Application or by clicking the “Exit” button on the Setup
screen of the Host PC Application, and then clicking the “Exit EyeLink” button.
On the Display PC, you can access this interface by typing 100.1.1.1 in the
address bar of a browser (e.g., Chrome, Firefox; detailed instructions for
running the Web UI on the Display PC are provided in section 2.1.4).
The Web UI consists of a File Manager and a Configuration Tool.
2.1.1 File Manager
The EyeLink Portable Duo Host Application runs on QNX, a Unix-like real-time
operating system, allowing the eye tracker to minimize delays in data
acquisition and transmission and to provide very low data access variability.
The File Manager allows the users to see how the Host PC’s files are organized
and to copy, move, rename, download, upload, and edit files.
The File Manager consists of a title bar, a browser URL (if running from the
Display PC side), a toolbar, a tree view panel, a folder view panel, and a
preview/edit panel (see Figure 2-1).

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EyeLink Portable Duo Host Software
©2016-2017 SR Research Ltd.
Figure 2-1: File Manager Screen
1) Titlebar – this displays “SR Research EyeLink File Manager”.
2) Browser URL – this is configured as http://100.1.1.1/FileManager.html
by default. This URL depends on the IP address configuration of the Host PC
(100.1.1.1 is the default Host PC address).
3) Toolbar – this contains a list of buttons that perform actions on the
currently selected files/folders. From left to right, the buttons on the toolbar
are:
Tracker
Clicking on this icon will start the EyeLink Portable Duo
Host application if the camera is attached to the USB
3.0 ports on the Host PC.
Configuration
Switches to the Configuration interface, allowing users
to change some of the tracker settings.
Show/Hide Tree
Toggles on/off the visibility of the Tree View panel.
Show/Hide
Preview/Edit Panel
Toggles on/off the visibility of the Preview/Edit panel.