Cedrus manufactures a StimTracker signal adapter board that makes it possible to interface with Neuroscan’s EEG data recorders. The signal adapter uses and comes with a standard DB25 cable. This document describes the signals that the signal adapter board makes available to Neuroscan.
Using SCAN
Neuroscan’s SCAN software has been superseded by Curry, and StimTracker’s interface to Neuroscan hardware was developed long after SCAN’s last major release. Consequently, only Trigger bits 0-7 can be detected by SCAN.
Using Curry 7.0.5 or later
Curry version 7.0.5 or later implements direct support for StimTracker. To use:
•
Click on Amplifier Control button
•
Click on Advanced button
•
Click on Trigger Settings button
The Trigger Settings dialog (screen) appears. Select the Cedrus StimTracker radio button.
Ground is on DB25 pin 25. See also the note in Using StimTracker about the rate at which the LEDs flash in StimTracker’s front panel.
StimTracker Signal
Seen by Neuroscan as
Comments
Event marker bit 7
Trigger bit 7
Event marker bit 6
Trigger bit 6
Event marker bit 5
Trigger bit 5
Event marker bit 4
Trigger bit 4
Event marker bit 3
Trigger bit 3
Event marker bit 2
Trigger bit 2
Event marker bit 1
Trigger bit 1
Event marker bit 0
Trigger bit 0
Light sensor 1
Response bit 7
Light sensor 2
Response bit 6
Microphone
Response bit 5
Audio L+R
Response bit 4
StimTracker will produce output when the volume rises above the preset threshold on either the left audio channel or the right audio channel
TTL input, line 4
Response bit 3
TTL input, line 3
Response bit 2
TTL input, line 2
Response bit 1
TTL input, line 1
Response bit 0
Last Revision: April 18, 2013
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