[Eeglablist] Biosemi electrodes and EEG data acquisition with PCI-DAS6402/16

Jacob Anderson ande2523 at umn.edu
Fri Feb 3 14:59:55 PST 2017


Dear Victor,

BioSemi electrodes will only work with the BioSemi amp/ADC box. The
electrode is fitted with a preamplifier I believe, so they active
electrodes instead of passive.There is some decent documentation on the
BioSemi website describing their methods, see the DRL/CM for how BioSemi
deals with grounding and reference.  I don't think what your trying to do
will work, esp without amplifying the signal.

Jake



On Thu, Feb 2, 2017 at 4:17 PM, Victor Flores Benites <suryavf at gmail.com>
wrote:

> Dear all,
>
> I and colleagues are implementing a laboratory in our university.
> We have an 32 electrode array of Biosemi for setup in an analog
> adquisition system. We use a PCI-DAS6402/16 data acquisition card to
> digitize the EEG signal.
>
> We have some questions:
>
>    - The biosemi electrodes have an internal circuit (
>    https://www.biosemi.com/pics/pin_bundle1_large.jpg
>    <https://www.biosemi.com/pics/pin_bundle1_large.jpg>). Is that circuit
>    an impedance adaptor or an amplifier?
>    - We have configured PCI-DAS6402/16 data acquisition card in
>    64-channel single-ended mode pin out. We think that the reference electrode
>    must be connected to the LLGND pin. Is this correct?
>    - To which pin should the ground electrode be connected?
>
>
> Thanks for your help!
>
> --
> Victor Flores Benites
> Bachiller en Ingeniería Electrónica - UNI
> Investigador - Universidad de Lima
> +(51) 975712054 <+51%20975%20712%20054> - RPM: #975712054
> suryavf at gmail.com | vfloresb at uni.pe
>
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-- 
*************************************************
Jacob E. Anderson, MA
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