[Eeglablist] Biosemi Event Markers

[Lloyd Smith]

Hi, Nikita.  Your assumption is correct.  ActiveTwo encodes the
conjunction of the two bits as a different integer value on the Status
channel.  EEGLAB will analyze the Status channel upon loading a BDF
dataset and place a unique event marker at the rising edge of changes on
the Status channel.  Be sure that you are using the latest release of
EEGLAB, since there are some improvements in handling events in BDF data
files in the latest release.

 

Lloyd Smith

Owner

 

Cortech Solutions, LLC

321 N. Front Street, Suite 113

Wilmington, NC 28401 USA

Tel: 910-362-1143

Fax: 910-362-1147

Cell: 910-431-2811

E-mail: LSmith at cortechsolutions

Web: www.cortechsolutions.com

________________________________

From: Nikita Kuznetsov [mailto:nikitakuznetsov at yahoo.com] 
Sent: Monday, August 06, 2007 3:28 PM
To: eeglablist at sccn.ucsd.edu
Subject: [Eeglablist] Biosemi Event Markers

 

Dear all,

I have a question about event markers in Biosemi. We used DAQtoobox to
send triggers for the onset of each experimental condition. And it seems
like separate trigger codes are being sent each time one pin is set to
'high' which is great for us. Does anyone know if a unique trigger code
can be assigned to an event if we set a two or more pins to 'high'? For
example, pin 20 'high' and pin 21 'high' should give a different code
than just 20 'high' or 21 'high'. I hope my question makes sense, or
I'll try to explain it better.

Thanks in advance,
Nikita   

  

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