Contributions:Biosemi2ADC

Synopsis

Alpha Version of the BIOSEMI acquisition module.

Location

http://www.bci2000.org/svn/trunk/src/contrib/SignalSource/Biosemi

Versioning

Authors

Samuel A. Inverso (samuel.inverso@gmail.com), Yang Zhen

Version History

Revision 1.2 2005/12/14 15:24:15 mellinger: Fixed state name typo in Process(). Revision 1.1 2005/12/12 00:05:24 sinverso: Initial Revision: Working and tested offline. Not tested in real experiments.

Source Code Revisions

Initial development: 960
Tested under: --
Known to compile under: 1658
Broken since: --

Functional Description

Acquires from a Biosemi Act2. Tested with a MK1, may work on a MK2.

Converts the signal to microvolts before sending it.

In Source parameters you can set the module to postfix the BIOSEMI trigger channels after the signal channels. i.e. if you acquire 64 channels of EEG, and set postfix to true, channels 0 to 63 will be EEG and channels 64 to 79 will be trigger channels 0 to 15. Warning: If postfix trigger channels is 0, the trigger values will not be saved in the data files and are not recoverable.

Installation

Copy the Labview_DLL.dll to the prog directory for the module to work.

Parameters

PostfixTriggers

Make the triggers 16 channels and place them after end of EEG channels?

0: no (they will not be saved at all),
1: yes, post fix them.

TriggerScaleMultiplier

A number to multiply triggers by to scale them to the visualization range.

States

BatteryLow

Set to 1 when hardware reports low battery state.

Mode

The mode corresponding to the one on the front of the Biosemi box.

MK2

Set to 1 when connected to an MK2.