Two EEGs plus AIB

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juank
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Joined: Tue May 20, 2008 6:32 pm
Location: Laboratorio de Neurociencia Integrativa, Depto de Física, FCEyN, UBA, Argentina
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Two EEGs plus AIB

Post by juank » Mon Feb 24, 2014 1:29 pm

Hi,

I wanted to connect two EEG in daisy chain (I already did it in previous experiments) and the AIB. Can I do this? Which SPEEDMODE I have to use?

Thanks a lot!
Best,
Juan

Coen
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Re: Two EEGs plus AIB

Post by Coen » Mon Feb 24, 2014 1:45 pm

You can do this with a bit improvisation:

EEG 1: sppedmode 0
EEG 2: speedmode 1
AIB: speedmode 2

You will then see the AIB channels in ActiView as monopolar (EEG) channel 1-32 of Box 3 (with the AIB tab-page greyed out). The AIB channels will be saved in the BDF file with channel labels 3-1, 3-2 etc. The only thing to watch our for is that the gain declared in the file header will be a factor 4 to high for the AIB channels (AIB has LSB = 125 nV, while the file header will declare LSB = 31.25 nV for all channels, both EEG and AIB).

Best regards, Coen (BioSemi)

juank
Posts: 9
Joined: Tue May 20, 2008 6:32 pm
Location: Laboratorio de Neurociencia Integrativa, Depto de Física, FCEyN, UBA, Argentina
Contact:

Re: Two EEGs plus AIB

Post by juank » Mon Feb 24, 2014 1:59 pm

Thanks a lot! I'll try that!

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