Tobii Pro Spectrum User manual

Tobii Pro Spectrum Eye Tracker
User’s Manual

User’s manual Tobii Pro Spectrum Eye Tracker
Version 2.0.10
08/2019
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Content subject to change without notice.
Please check Tobii web site www.tobiipro.com for updated
versions of this document.

Table of Contents
1 Introduction ................................................................................................................................... 1
1.1 Overview ..............................................................................................................................1
1.2 Basic operating principles ......................................................................................................1
1.3 Product versions ...................................................................................................................1
2 Hardware Package Content ......................................................................................................... 2
3 Product Care................................................................................................................................. 3
3.1 Transportation and storage ....................................................................................................3
3.2 Cleaning...............................................................................................................................3
3.3 Disinfection...........................................................................................................................3
3.4 Transporting the Pro Spectrum...............................................................................................3
3.5 Disposing of the Pro Spectrum ...............................................................................................3
4 Setting up the Pro Spectrum ........................................................................................................ 4
4.1 Ventilation ............................................................................................................................4
4.2 Testing environment ..............................................................................................................4
4.3 Mounting the monitor to the eye tracker unit ............................................................................4
4.4 Connecting the eye tracker ....................................................................................................5
4.4.1 Powering on the Pro Spectrum................................................................................5
4.5 Monitor settings ....................................................................................................................6
5 Setup Options ............................................................................................................................... 7
5.1 Mounting the Pro Spectrum on a VESA mount (setup 3 in the image above) ..............................8
5.2 Mounting a scene camera......................................................................................................8
6 Eye Tracker Configuration............................................................................................................ 9
6.1 Tobii Pro Eye Tracker Manager ..............................................................................................9
6.2 Keeping your eye tracker software and display setup updated ..................................................9
6.3 Upgrading and downgrading the eye tracker’s firmware ...........................................................9
6.4 Configuring Pro Spectrum in Tobii Pro Eye Tracker Manager ..................................................10
6.4.1 Changing the Pro Spectrum's frequency setting .....................................................10
6.4.2 Configuring Pro Spectrum for standalone use ........................................................10
7 Specific Features.........................................................................................................................11
7.1 User Calibration for Pro Spectrum ........................................................................................ 11
7.1.1 Binocular calibration............................................................................................. 11
7.1.2 Monocular calibration ........................................................................................... 11
7.2 Using the TTL input port for external event recording .............................................................12
7.3 Eye images.........................................................................................................................12
Appendix A Pro Spectrum – Specifications .................................................................................... 13
A1 Eye tracking specifications...................................................................................................13
A2 Unit specifications ...............................................................................................................14
A3 Compliance and certifications ..............................................................................................16
A4 Software Options ................................................................................................................18
Appendix B Recommended monitor ............................................................................................... 19
Appendix C Support, Learning Center, and Warranty ................................................................... 20
C1 Customer Support...............................................................................................................20
C1.1 Get Help Online ...................................................................................................20
C2 Learning Center ..................................................................................................................20
C3 Warranty information ...........................................................................................................20

Appendix D Glossary ...................................................................................................................... 21
Appendix E Safety and compliance ................................................................................................ 23
E1 Safety ................................................................................................................................23
E1.1 Emergency Warning.............................................................................................23
E1.2 Infrared Warning ..................................................................................................23
E1.3 Epilepsy Warning.................................................................................................23
E1.4 Child Safety.........................................................................................................23
E1.5 Do not open Tobii Pro Spectrum............................................................................23
E1.6 Environment........................................................................................................24
E2 Other limitations and considerations .....................................................................................24
E2.1 Intended use .......................................................................................................24
E2.2 Light conditions....................................................................................................24
E2.3 Eyelashes ...........................................................................................................24
E2.4 Droopy eyelids.....................................................................................................24

1 Introduction
1.1 Overview
This user manual describes the features and functionalities of the Pro Spectrum eye tracker. The Pro Spectrum can be
used in various setups, either with an attached monitor or as s standalone unit, to perform eye tracking with physical ob-
jects. The typical setup is having the Pro Spectrum connected to a PC running Pro Lab, see the image below.
The design enables the subject to move naturally during recording while still achieving high accuracy and precision.
1.2 Basic operating principles
The Pro Spectrum use infrared illuminators to generate reflection patterns on the corneas of the subject’s eyes. These pat-
terns, plus other visual data about the subject, are collected by image sensors. Sophisticated image-processing algorithms
identify relevant features, including the eyes and the corneal reflection patterns. Complex mathematics is used to calculate
the 3D position of each eyeball and the gaze point on the screen (or when a screen isn’t used, for the gaze point on the ob-
ject); in plain words, it tells you where the subject is looking.
Eye trackers from Tobii Pro are designed for use in indoor office environments and for tracking on humans.
1.3 Product versions
The Pro Spectrum is available in four product versions: 1200 Hz, 600 Hz, 300 Hz and 150 Hz. The values denote the eye
tracker’s maximum sampling frequency, but it can be used at lower settings as well. The 600 Hz, 300 Hz and 150 Hz ver-
sions can be upgraded to a faster version. Contact your sales representative or Tobii Pro for more information.
Tobii Pro Spectrum Eye Tracker User’s manual v.2.0.10 - en-US 1 Introduction 1

2 Hardware Package Content
A. Angle meter I. USB cable for connection between the PC and the moni-
tor’s integrated USB hub
B. Measuring tape J. Cold shoe for mounting of a user camera
C. Power cables for monitor (UK, US, EU and Aus/China) K. DisplayPort cable
D. Monitor L. HDMI cable
E. Eye tracker M. Cleaning cloth
F. Monitor mounting bracket N. Fabric cord sleeve for collecting the cables
G. Power cables for eye tracker (UK, US, EU and Aus/
China)
O. Ethernet cable
H. Power adaptor for eye tracker
22 Hardware Package Content Tobii Pro Spectrum Eye Tracker User’s manual v.2.0.10 - en-US

3 Product Care
3.1 Transportation and storage
For transportation and storage, the recommended range for temperature and humidity for the device is as follows:
•Temperature: -40°C to 70°C (-40°F to 158°F)
•Humidity: 20% to 95% (no condensation on the device)
The Pro Spectrum is not waterproof or water resistant. The device should not be kept in excessively humid, damp
or wet conditions. Do not submerge the device in water or in any other liquid. Be careful not to spill liquids on the
device.
3.2 Cleaning
Before cleaning the Pro Spectrum, unplug all cables. Use a soft, slightly damp, lint-free cloth. Avoid getting moisture in
openings on the device. Don’t use window cleaners, household cleaners, aerosol sprays, solvents, alcohol, ammonia, or
abrasives to clean the device.
Keep in mind that scratches on the front surface of the eye tracker may cause impaired eye tracking
performance.
3.3 Disinfection
The surfaces of the Tobii Pro Spectrum can be cleaned with Isopropyl alcohol using a moist, soft, lint-free, non-scratching
cloth. Do not let liquid Isopropyl alcohol enter into the unit. Be careful not to scratch the front filter surface as it is part of the
optical system and scratches will reduce the product's performance.
3.4 Transporting the Pro Spectrum
Before storage or shipping, disconnect all cables and use the travel case and packaging materials provided.
3.5 Disposing of the Pro Spectrum
Do not dispose of Pro Spectrum in general household or office waste. Follow your local regulations for disposal of elec-
tronic equipment.
Tobii Pro Spectrum Eye Tracker User’s manual v.2.0.10 - en-US 3 Product Care 3

4 Setting up the Pro Spectrum
4.1 Ventilation
As with most electronic devices, the Pro Spectrum generates heat during use and needs adequate ventilation. Allow for
free air flow around the unit and never cover it as this will restrict the air flow and lead to overheating.
4.2 Testing environment
The Pro Spectrum is best kept in dry conditions at room temperature. The recommended range for temperature and hu-
midity during operation is as follows:
•Temperature: 15°C to 30°C (59°F to 86°F)
•Humidity: Max 20% to 95% (no condensation on the device)
4.3 Mounting the monitor to the eye tracker unit
The Pro Spectrum is delivered with the monitor already mounted. If this for any reason is not the case, e.g. someone has
been using the unit as a standalone eye tracker, you need to reattach the monitor to the base. You mount and remove the
monitor swiftly thanks to its one-screw fastening.
Procedure for affixing the mounting bracket:
1. Make sure the eye tracker is placed on an even and steady surface.
2. Hold the monitor firmly and insert the lower end of the mounting bracket into the slot on the top of the eye tracker.
3. When the lower end of the mounting bracket is fully inserted into the slot, gently tilt the screen forward.
4. When the mounting bracket is in place, secure it by pushing the lock knob downwards and turning it until it is firmly
in place.
44 Setting up the Pro Spectrum Tobii Pro Spectrum Eye Tracker User’s manual v.2.0.10 - en-US

If you need to remove the monitor, repeat the above steps in the reverse order.
4.4 Connecting the eye tracker
The Pro Spectrum is connected to a standard Ethernet network with a RJ–45 connector.
Procedure for attaching the power supply:
1. Attach the supplied Ethernet cable to the corresponding Ethernet socket on the eye tracker.
2. Attach the other end of the Ethernet cable to the Ethernet socket on your PC. It is also possible to connect the eye
tracker to a switch connected to your LAN.
3. Attach the supplied power adapter cable to the corresponding outlet on the eye tracker.
a. Choose the power cable with the power plug suited for the electrical outlet and connect the other end to the AC
adapter.
b. If neither of the power plugs suits your needs, please contact your sales representative or Tobii Pro Support for
assistance.
c. Insert the power cable plug to a mains power outlet.
4.4.1 Powering on the Pro Spectrum
The Pro Spectrum’s power switch is located on its back side. We recommend that you shut off the unit after the workday or
for longer periods of inactivity.
During startup, the illuminators in the front of the Pro Spectrum, lit up one by one to indicate that the LED-hardware is OK.
Approximately 20 seconds after you power on, a short beep is heard, indicating that the processor module has loaded the
BIOS and now begins to load the operating system.
After another 20 seconds two long beeps are heard, indicating that the system is ready for use.
If anything goes wrong (no matter the cause), you hear three short beeps about 40 to 50 seconds after the powering-on se-
quence, followed by a short pause and then another three short beeps.
Tobii Pro Spectrum Eye Tracker User’s manual v.2.0.10 - en-US 4 Setting up the Pro Spectrum 5

You turn off the eye tracker by pressing the power switch. During shut down, the power switch indicator lamp flashes. De-
pending on the unit’s internal state, powering down can take up to 20 seconds.
You force a shutdown of the Pro Spectrum by pressing the power switch for at least 5 seconds.
4.5 Monitor settings
The Pro Spectrum is supplied with a pre-mounted 23.8” monitor.
Note that the monitor has two power switches: one main power switch on the backside and one ON/OFF switch
on the front. Make sure the main switch is ON before starting the monitor with the ON/OFF switch.
1. Attach the supplied DisplayPort or HDMI cable to the corresponding connector on your computer.
It is possible to use any of the other display interfaces on the monitor as well. However, for the best per-
formance we recommend DisplayPort or HDMI, depending on what your PC is equipped for.
2. Choose the power cable with the plug suited for the wall outlet and connect the other end to the corresponding out-
let on the monitor.
3. Insert the power cable plug to a power outlet.
4. If neither of the plugs works with your power outlet, please contact your sales representative or Tobii Pro Support
for assistance.
64 Setting up the Pro Spectrum Tobii Pro Spectrum Eye Tracker User’s manual v.2.0.10 - en-US

5 Setup Options
1. The Pro Spectrum as delivered with the monitor mounted on the eye tracker
2. The Pro spectrum as a standalone eye tracker without monitor
3. Eye tracker and monitor together on a VESA 100x100 mount.
(Instructions of how to remove the stand and mount the eye tracker and monitor on the VESA mount are in the sec-
tion below.)
4. Standalone with monitor
You can use the eye tracker with another monitor, but that is not recommended (see Appendix B).
Tobii Pro Spectrum Eye Tracker User’s manual v.2.0.10 - en-US 5 Setup Options 7

5.1 Mounting the Pro Spectrum on a VESA mount (setup 3 in the image
above)
The Pro Spectrum can be mounted on a standard VESA 100x100 mount. Proceed in the following way:
1. Remove the stand by unscrewing the two screws from the underside (see image below).
2. Fold the two legs upwards so they lie neat against the eye tracker’s side panels (as in setup 3 in the Setup Options-
image above). Make sure they don’t cover the ventilation holes on the side panel.
3. Attach the VESA mount to the bracket with four screws.
5.2 Mounting a scene camera
Beneath the eye tracker there is a mount used for attaching a scene camera (purchased separately).
Mounting procedure:
1. Attach the enclosed mounting bracket to your camera unit.
2. Slide the assembly into the scene camera mount and tighten the screw.
85 Setup Options Tobii Pro Spectrum Eye Tracker User’s manual v.2.0.10 - en-US

6 Eye Tracker Configuration
Tobii Pro Spectrum is configured via Tobii Pro Eye Tracker Manager.
6.1 Tobii Pro Eye Tracker Manager
Tobii Pro Eye Tracker Manager is free software available on the Tobii Pro Products webpage.
Pro Eye Tracker Manager helps you manage your screen-based eye tracker. It lets you see which eye tracker firmware
and software versions you are running and also facilitates applicable updates where applicable. It provides:
• Drivers and Firmware installation or updates
• Display setup
• Positioning guide
• User calibration
• Gaze visualization*
You can read more about Tobii Pro Eye Tracker Manager and how it works with Tobii Pro eye trackers (specifica-
tions) on our Tobii Pro Eye Tracker Manager Product page.
References in the manual to Tobii Pro Eye Tracker Manager refer to the latest version available on Tobii Pro’s
website.
*Gaze visualization in Pro Eye Tracker Manager lets you quickly evaluate the quality of the eye tracking data.
The Gaze visualization overlaps data only on the Pro Eye Tracker Manager screen while Pro Eye Tracker Man-
ager is open.
6.2 Keeping your eye tracker software and display setup updated
Updates
From time to time, Tobii Pro releases updates for an eye tracker’s applicable driver and firmware in order to improve per-
formance and/or introduce new functionalities. Please check the Tobii Pro website regularly for news and information about
updates about your eye tracker. We recommend that you activate updates and notifications in Pro Eye Tracker Manager.
How to activate notifications and updates in Pro Eye Tracker Manager:
1. Click to expand the drop-down list at the top of Pro Eye Tracker Manager.
2. Toggle the switches for notifications. Orange means they are activated.
3. If a software update is available, the available update has a clickable orange link.
4. Select an interface language. The default is English.
Display setup updates
Use Pro Eye Tracker Manager whenever you change computers or display setups.
All references to Pro Eye Tracker Manager assume that you are using the latest version of this free software.
6.3 Upgrading and downgrading the eye tracker’s firmware
You can determine which firmware version your connected Pro Spectrum uses by reading the details on the displayed card
with your eye tracker’s name in Pro Eye Tracker Manager. Firmware versions are listed on the Drivers & Firmware tab.
You can upgrade or downgrade the firmware by resetting the eye tracker to factory defaults and then reinstalling the de-
sired firmware version.
Downgrading:
1. Turn on the eye tracker and confirm that it appears in Pro Eye Tracker Manager.
Tobii Pro Spectrum Eye Tracker User’s manual v.2.0.10 - en-US 6 Eye Tracker Configuration 9

2. Restart Pro Spectrum by inserting a pointy device (i.e. a straightened paper clip) into the recessed reset button
hole, located between the power connector and the data port on the connector panel at the back of the eye tracker.
Keep pressing the reset button till you hear a beep.
3. The Pro Spectrum eye tracker restarts one or more times. This is not an error. After a while, your eye tracker ap-
pears in Pro Eye Tracker Manager again.
4. On the Drivers & Firmware tab in Pro Eye Tracker Manager, select the desired firmware version from the list and
click the Install button.
Upgrading:
1. Turn on the eye tracker and confirm that it appears in Pro Eye Tracker Manager.
2. On the Drivers & Firmware tab in Pro Eye Tracker Manager, select the desired firmware version from the list and
click the Install button.
6.4 Configuring Pro Spectrum in Tobii Pro Eye Tracker Manager
In Pro Eye Tracker Manager you can change some settings for your Pro Spectrum. For instance, you can create and recall
setups for using the eye tracker in standalone mode and change the eye tracker’s frequency.
6.4.1 Changing the Pro Spectrum's frequency setting
1. Start Pro Eye Tracker Manager. Pro Spectrum will displays as a “card” in the list of available eye trackers at the top.
2. Select Pro Spectrum by clicking on it.
3. On the Drivers & Firmware tab, you can select the desired frequency setting from the drop-down list.
Option with reduced infrared light: If you change the sampling frequency to 60 or 120 Hz, you reduce the bright-
ness of the infrared light from the eye tracker. This is useful when you want a highly unobtrusive setup for the par-
ticipant. This low visibility option is only available for 60 and 120 Hz.
6.4.2 Configuring Pro Spectrum for standalone use
1. Start Pro Eye Tracker Manager on your computer. All available eye trackers appear in the “Connected Eye Track-
ers” pane.
2. Select Pro Spectrum by clicking on it.
3. On the Overview tab, locate Display Setup and click the ellipsis button to the right. On the drop-down menu, click
New.
4. Follow the instructions in each configuration step, including naming your new setup.
5. When finished, your new setup appears in the drop-down list of display setups.
6. To confirm that Pro Spectrum can detect the participant’s eyes, enable the Position Guide at the bottom left of Pro
Eye Tracker Manager. Once activated, you should be able to see two circles in a face contour.
10 6 Eye Tracker Configuration Tobii Pro Spectrum Eye Tracker User’s manual v.2.0.10 - en-US

7 Specific Features
7.1 User Calibration for Pro Spectrum
The Pro Spectrum calibration procedure allows for robust eye tracking research by facilitating workflows that take into con-
sideration your research questions, as well as the characteristics of your participant.
Pro Spectrum supports:
1. Binocular calibration
2. Monocular calibration
7.1.1 Binocular calibration
The binocular calibration is successful if enough data has been collected to successfully calibrate both eyes. Calibration re-
sults are presented for all the points in which data has successfully been collected for both eyes. To improve a calibration,
you can redo the entire calibration or recalibrate the points for which data is missing or not good enough for your research.
This is an efficient and powerful method to calibrate your participant’s eyes, suitable for most research questions and for
most participants.
Available in:
• Tobii Pro Lab, when selecting the Calibration stimuli in the Design Timeline
• Tobii Pro SDK, when using screen-based calibration class/methods
7.1.2 Monocular calibration
Pro Spectrum’s monocular calibration functionality lets you to collect eye tracking data optimized for each of the eyes of
the participant. Pro Spectrum can robustly identify the left and right eyes, irrespective if only one eye or both are visible to
the eye tracking sensors. For increased confidence in some cases, you could choose to cover the eye that is not tracked,
but this is not required.
This functionality is useful if one eye causes the binocular calibration process to fail. This could happen, for example, due
to severe strabismus, or if one eye is a prosthetic.
Separate calibration for the two eyes is also useful for research into binocular coordination and fixation disparity, or in situa-
tions where you would like the calibration to pass even if only one eye could be tracked.
Note that a default calibration is used for the eye that was not selected for calibration or that has failed to calibrate. During
the recording, Pro Spectrum will continue to search for both eyes because it is less likely to find data for the uncalibrated
eye. Nevertheless, Pro Spectrum will report the data for the uncalibrated eye when available.
Pro Spectrum allows for two types of monocular calibration:
• Both eyes
• Only one eye – left or right
Depending on how the calibration flow is implemented in the software, you can choose to perform a calibration for both
eyes at a time; calibrate only one eye – left or right; or calibrate first one eye, and then the other.
Calibrating both eyes at a time:
Using the Monocular calibration functionality provides more granularity for your calibration results, reporting on whether
the participant’s left, right or both eyes have been successfully calibrated. Results will be presented for each point. In this
case you can successfully calibrate even if only one eye was correctly calibrated. You can improve a successful calibration
by redoing the calibration, or by selecting to calibrate first one eye and then the other. In this case one can successfully cal-
ibrate even if only one eye was successfully calibrated. One can improve a successful calibration by redoing the calibra-
tion, or by selecting to calibrate only one eye, and then the other.
Calibrating only one eye at a time:
Using the Monocular calibration functionality lets you calibrate only one of your participant´s eyes, while ignoring the other
eye. In this case, a calibration is successful if enough data has been collected for the eye of interest and the other eye is
ignored. The calibration results report how good the calibration was for the eye of interest. If the data is not good enough
Tobii Pro Spectrum Eye Tracker User’s manual v.2.0.10 - en-US 7 Specific Features 11

for your research, you can improve a calibration by redoing the entire calibration or recalibrating the points with missing da-
ta for the eye of interest. Proceed with calibrating the other eye if desired.
Available in:
•Tobii Pro Eye Tracker Manager, when selecting Calibration mode you can choose between: Both eyes, Right eye
or Left eye
•Tobii Pro SDK, when using Screen based Monocular calibration class/methods
For more details on how to calibrate Tobii Pro Spectrum using Tobii Pro Eye Tracker Manager, read Performing a monocu-
lar calibration with the Tobii Pro Spectrum.
For more details on the Binocular and Monocular calibration using Tobii Pro SDK, visit developer.tobii.com
7.2 Using the TTL input port for external event recording
The Pro Spectrum is equipped with a digital data input port that records events in up to eight parallel TTL signals. The
events are recorded with a time-stamp accuracy better than 50 µs. The detected events are available in decimal format (0–
255) through either Pro Lab or the Pro SDK. The TTL signal can be combined to obtain up to 256 different events.
Any digital signal source fulfilling the electrical specification can be connected to the tracker, for example the Cedrus
Stimtracker.
Interface: 8–bit parallel TTL input (DBc9)
TTL levels: Vin < 0.8 V => Logical 0; Vin > 2 V => Logical 1
Pinning: pin 1-8: inputs; pin 9: GND
Input voltage interval: 0–5 V
Connector shielding: connected to system chassis ground
Input configuration: inputs (pin 1-8) are connected to pull up resistors and are opto-isolated.
7.3 Eye images
Eye images are available in 10Hz from the Spectrum eye tracker. Each eye tracking camera provides 5Hz image stream.
During tracking mode (i.e. when the eye tracker detects eyes), the image resolution is 496x175, except when for 1200 Hz
when the resolution is 384x105. During gaze recovery (i.e. when the eye tracker doesn’t detect eyes), the image resolution
is 640x512.
The eye images are accessed via Pro SDK. They are also visible in Eye Tracker Manager.
12 7 Specific Features Tobii Pro Spectrum Eye Tracker User’s manual v.2.0.10 - en-US

Appendix A Pro Spectrum –
Specifications
A1 Eye tracking specifications
The characteristics of the gaze data from an eye tracker are described in terms of accuracy and precision. Accuracy indi-
cates the angular average distance from the actual gaze point to the one measured by the eye tracker. Gaze precision indi-
cates the spatial variation between successive samples collected when the subject fixates at a specific point on a stimuli.
Eye-tracking technique Binocular bright and dark pupil tracking
Two cameras capture stereo images of both eyes for the ac-
curate measurement of eye gaze and eye position in 3D
space, as well as pupil diameter
Sampling frequency 60, 120, 150, 300, 600 or 1200 Hz (max. frequency depends
on product version)
Accuracy* 0.3° at optimal conditions (down to 0.16°)
Precision* 0.06° RMS at optimal conditions (down to 0.04°)
Precision filtered* 0.01° RMS at optimal conditions
Maximum gaze angle 30°
Freedom of head movement Width x height: 34 cm x 26 cm (13.5’’ x 10’’) at 65 cm (at least
one eye tracked).
Operating distance 55 to 75 cm (22’’ and 30’’) from the eye tracker reference
point
Total system latency Less than three frames (eg. <2.5 ms at 1200 Hz)
Blink recovery time One frame (immediate)
Gaze recovery time Less than 150 ms
Recommended monitor Supplied 23.8” monitor (see note below)
Data output (for each eye) Timestamp
Gaze origin
Gaze point
Pupil diameter
Eye image data stream Eye image stream frequency is approx. 2x5 Hz
Zoomed-in eye images are available in tracking mode
Full-frame camera images available in gaze recovery mode
TTL input stream 8–bit time-stamped data (256 event codes)
Event-driven detection with a timestamp accuracy of 50 µs
User calibration options Standard calibration, 1-14 calibration points
Additional options to calibrate only one eye (left/right), or one
eye at the time.
Tracker and client time synchronization Integrated synchronization between the eye tracker time do-
main and the client computer time domain, with an accuracy
of 100 µs.
*Tobii Pro uses an extensive test method to measure and report performance and data quality. Please download
the data quality test report for more detailed information: https://www.tobiipro.com/tobii-pro-spectrum/.
Tobii Pro Spectrum Eye Tracker User’s manual v.2.0.10 - en-US Appendix A Pro Spectrum – Specifications 13

For more information about output data and the supplementary data stream, see the Pro SDK documentation
here: http://www.tobiipro.com/product-listing/tobii-pro-sdk/.
A2 Unit specifications
The Pro Spectrum is an integrated eye tracker with a removable 23.8’’ monitor. Removing the monitor transforms the inte-
grated eye tracker into a standalone eye tracker.
Eye tracker
Dimensions 55 cm x 18 cm x 6 cm (22” x 7” x 2’’)
The eye tracker is mounted on a stand which raises it 9 cm
(approximately 4”) from the surface.
Weight 5.1 kg (11.4 lbs.)
With the power supply unit, the weight is 5.7 kg (12.9 lbs.)
Eye tracker processing Integrated in the eye tracker unit
User camera mount Standard 1/4” thread
Connectors TTL input: 8-bit (DB-9 connector)
Communication: Ethernet (RJ-45 connector)
Power supply: 24 VDC (5.5 mm connector)
Power Maximum rated power consumption: 96 W
Typical power consumption: 60 W
External power supply Input: 100-240 VAC 50/60 Hz
Maximum rated power consumption: 120 W
No load power consumption: <0.15 W
Energy efficiency level: VI
Complies with EISA 2007/DoE, NRCan, AU/NZ MEPS, EU
ErP and CoC Version 5
14 Appendix A Pro Spectrum – Specifications Tobii Pro Spectrum Eye Tracker User’s manual v.2.0.10 - en-US