EOG - Direct current (DC) versus Alternatice current (AC)

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anais
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Joined: Thu Oct 01, 2020 9:31 am

EOG - Direct current (DC) versus Alternatice current (AC)

Post by anais »

Hello,

I would like to record EOG signal in order to analyze the position of the eyes. In the litterature, they recommend a Direct Current Amplifier (because the Alternative Current genetares a drift to zero after each eye movement). Is there a possibility to record the signal in a Direct Current with BioSemi? If yes, how?

Thanks in advance,

Anaïs

Coen
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Re: EOG - Direct current (DC) versus Alternatice current (AC)

Post by Coen »

The BioSemi ActiveTwo system has a DC amplifier, signals saved to file are always DC.

Switch the high-pass filter (left sidebar) off to display the signals in DC mode during recording. Note: the filters (as well as all other controls) in the left sidebar do not affect the data saved to file. Bandwidth saved to file is always DC to 1/5th of the sample rate (as indicated in the right sidebar).

Best regards, Coen (BioSemi)

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