Extracting Status Information (Electrode Offset, CMS in range)

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KatPa
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Joined: Thu Nov 16, 2017 2:30 pm

Extracting Status Information (Electrode Offset, CMS in range)

Post by KatPa » Thu Nov 16, 2017 2:33 pm

Dear,

I was wondering if it is possible to extract somehow the status information about the electrode offset and the CMS in range from the BDF files? I know it is saved somewhere (as I can see it an the BDF reader), but I don't know how to extract this information into a readable file format (for R or Matlab). Does anyone have an idea for that?

Thank you,
Katharina

Coen
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Re: Extracting Status Information (Electrode Offset, CMS in range)

Post by Coen » Mon Nov 20, 2017 4:49 pm

Status information is coded in the Most Significant Byte (8 Most Significant Bits) of the trigger/status channel (always the last channel), see https://www.biosemi.com/faq/trigger_signals.htm

Offsets are the DC values of the channels, see viewtopic.php?t=56

Best regards, Coen (BioSemi)

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