Different event codes (triggers) in EEGLAB

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Joined: Wed Nov 25, 2020 2:47 pm

Different event codes (triggers) in EEGLAB

Post by DrCri »

Hello everyone,
After reading several posts about it, I am not sure how to fix my problem with triggers.

Currently I send triggers from Python through the serial port.
During the session I can perfectly visualize all the codes (triggers) in the continuum, but when I open my dataset in EEGLAB the codes are completely different.
The waves and everything else is fine, the problem is with the event codes.
In fact, I don't even know if these "new codes" correspond to the original events I programmed : for instance, instead of a 2 a 64514 appears.

I'd like to find out why this is happening and how to fix it, any help is really welcome.

Best regards,

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Re: Different event codes (triggers) in EEGLAB

Post by Coen »

- Use the ""analog" display mode to inspect the 16 separate trigger lines.
- Use positive logic: pull all 16 lines low between the triggers.
- To see the same numbers as "decimal" display mode: split the 16 trigger bits in two 8-bit groups.

Best regards, Coen (BioSemi)

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