I have the dataset IIa from BCI Competition 2003. I would like to know that what will I have todo to get the absolute values of EEG signals in microVolts. I have read that the amplification used for this dataset was 20000. Does that mean simply dividing the signal values by 20000 would give me absolute values ?
Please help....
Amplification of BCI2000 System EEG Signals
Conversion factor ...
Hi,
The numbers are in units of A/D units. The conversion factor to micro Volts is 0.008.
I hope this helps,
Gerv
The numbers are in units of A/D units. The conversion factor to micro Volts is 0.008.
I hope this helps,
Gerv
data acquisition ...
Faisal,
This completely depends on the bit resolution of your A/D converter and the input range of your A/D card/EEG system. The easiest thing is if you acquire a signal with a known amplitude, and then see how large it is. This will determine the conversion factor.
Gerv
This completely depends on the bit resolution of your A/D converter and the input range of your A/D card/EEG system. The easiest thing is if you acquire a signal with a known amplitude, and then see how large it is. This will determine the conversion factor.
Gerv
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