Tobii Pro Pro Spectrum, User Manual

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Pro Spectrum User Manual v2.1 20
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 cal-
ibration, or by selecting to calibrate first one eye and then the other. In this case one can suc-
cessfully calibrate even if only one eye was successfully calibrated. One can improve a successful
calibration by redoing the calibration, 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 col-
lected 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 for your research, you can
improve a calibration by redoing the entire calibration or recalibrating the points with missing data
for the eye of interest. Proceed with calibrating the other eye if desired.
Available in:
l
Tobii Pro Eye Tracker Manager, when selecting Calibration mode you can choose between:
Both eyes, Right eye or Left eye
l
Tobii Pro SDK, when using Screen based Monocular calibration class/methods
For more information on how to calibrate Tobii Pro Spectrum using Tobii Pro Eye Tracker Man-
ager, read the Learn article,
Performing a monocular calibration with the Tobii Pro Spectrum .
For more information on the Binocular and Monocular calibration using Tobii Pro SDK, visit
developer.tobii.com .
7.2 Use the TTL input port for external event recording
Tobii 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 timestamp accuracy better than 50 µs. The detected
events are available in decimal format (0–255) through either Pro Lab or 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 parallell TTL input (DBc9)
TTL levels: Vin <0,8 V=>; Vin > 2 V => Logical 1
Pinning: pin 1-8: inputs; pin 9: GND
Input voltage interval: 0-5 V
Connector shielding: connect to system chassis ground