This support note applies to Neuroscan’s EEG systems that accept 16 bits of external triggers, e.g . SynAmps or SynAmps RT. Information about connecting to the Grael is available on a separate page.
Using SCAN
Neuroscan’s SCAN software has been superseded by Curry, and m-pod’s interface to Neuroscan hardware was developed long after SCAN’s last major release.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, which can also be used for m-pod support. 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.
When Connected to a Riponda or RB-x40 Response Pad
Seen by Neuroscan as
For
Trigger bit 7
USB bit 7
Trigger bit 6
USB bit 6
Trigger bit 5
USB bit 5
Trigger bit 4
USB bit 4
Trigger bit 3
USB bit 3
Trigger bit 2
USB bit 2
Trigger bit 1
USB bit 1
Trigger bit 0
USB bit 0
Response bit 7
Light sensor
Response bit 6
—
Response bit 5
—
Response bit 4
—
Response bit 3
—
Response bit 2
—
Response bit 1
—
Response bit 0
—
Note
This default signal mapping is the most compatible with Neuroscan’s STIM software.
Some signals such as key presses are not available by default, but you can edit the signal mapping easily.
Note:
When used with a Lumina 3G controller, similar info applies.
When Connected to StimTracker
Trigger Value
For
Notes
Trigger bit 7
Trigger bit 6
Trigger bit 5
Trigger bit 4
Trigger bit 3
Trigger bit 2
Trigger bit 1
Trigger bit 0
Response bit 7
Response bit 6
Response bit 5
Response bit 4
Response bit 3
Response bit 2
Response bit 1
Response bit 0
USB bit 7
Quad model only
USB bit 6
Quad model only
USB bit 5
USB bit 4
Quad model only
USB bit 3
USB bit 2
USB bit 1
USB bit 0
Light sensor 1
Light sensor 2
Microphone
Audio (“L” or “R”)
Response key 4
Response key 3
Response key 2
Response key 1
m-pod contains a powerful microprocessor that can reassign any input signal to any output line, and without any significant delay. It can also assign multiple signals to the same output line.
The tables above describe the factory default. If your experiment or lab setup requires different output, Cedrus provides a free utility for configuring your m-pod. After you use it, your configuration is saved to flash memory so that it’s remembered even after you power off m-pod.
Last Revision: Aug 1, 2018
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