Re: Lots of noise on the CH1 of my Olimex SMT?

Hi Leo, thanks for taking the time to read me:


> 1)  was channel 1 connected to your passive electrode or to your active 
> electrode?

both channels were connected to passive electrodes


> 2) what was the source of the 2 channels?

Fp1/2 and F7/8 (loosely)

> 3) what was the time interval on the horizontal axis?

it was in seconds I think

> 4) did you use the same kind of (shielded) cables on both channels?

Yes


> If the cables where not both shielded, it could case this effect; if 
> they were both shielded, then perhaps you interchanged the connection
> from the shield of ch1 with the internal wire. 

they are shielded and I've tripled checked them with a multimeter, the
connections are fine


I've redone a test: 2 identical passive electrodes, one channel at a time, the
electrodes stay in place on the scalp, I just plug them on the CH1 and then on
CH2, here are the results:

CH1

http://imageshack.us/a/img600/6706/ch1w.jpg

CH2

http://imageshack.us/a/img191/2076/ch2qf.jpg

even when touching the USB, the signal on CH1 looks a bit fuzzier, I don't know.


Kris.





------------------------------------------------------------------------------
Everyone hates slow websites. So do we.
Make your web apps faster with AppDynamics
Download AppDynamics Lite for free today:
http://p.sf.net/sfu/appdyn_sfd2d_oct