SRBox Line Noise Artifacts - Mains Hums

[David McFarlane]

Daniela,

Never had a problem with electrical noise from the SRBox, however on 
our fMRI system we had a problem with hum in our subject audio 
system.  Among other things we added a line isolator to reduce any 
ground loops, we got rid of the hum but since we made other changes I 
do not know how much the isolator helped.  Sorry, I do not remember 
what exactly we bought, but it was probably something from Tripp Lite.

-- David McFarlane, Michigan State University


At 12/17/2008 10:00 AM Wednesday, you wrote:
>On Nov 21, 6:26 pm, Daniela <daniela.pfabi... at univie.ac.at> wrote:
> > Hello!
> >
>I have to ask again - does anyone have similar problems using the
>SRBox by PST.net?
>
> >
> > Our SRBox is responsible for remarkable line noise artifacts in the
> > ongoing EEG (for example: if the SRBox is moved unwittingly during
> > data acquisition, high amplitude artifacts are occuring for 
> nearly a second; another
> > example: if the subject puts his/her hand on the SRBox 50Hz line
> > noise is immediatly visible in the EEG).
> >
> >
> > Yours sincerly,
> > Daniela Pfabigan
> >
> > Brain Research Lab
> > Faculty of Psychology
> > University of Vienna


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