Manual modification of BDF files

Chanel · Post by **Chanel** » Mon Jul 30, 2007 9:31 am

Hi,

I'm coming to you because of a problem I encountered 2 times
during my EEG acquisition step. I use a seelf-modified version of the
acti-view sofware to get some trigger from another software (wich is not the best to obtain accurate timing but at leat it works). Until now
everything was working fine but on the last two recordings a trigger is
missing. I don't know why but this is not the point here. I just want to
know if you are aware of any way to modify the content of the .bdf so
that I add the triggers by hand ?

Guillaume Chanel

Post by **Coen** » Fri Aug 10, 2007 10:41 am

Please refer to the LabVIEW code of the cropper and decimater tools as an example of how to modify BDF files afterwards. In addition, study how ActiView adds the "start epoch" trigger bit to the BDF file. Combining these code examples should solve your problem.

Best regards, Coen (BioSemi)