From: lenngray (lenngray_at_yahoo.com)
Date: 2002-01-09 19:42:31
It also occurred to me that another issue about the
ProComp setup might be of interest to you guys.
The EEG pre-amps (for left and right channel) each
have three wires coming out of them -- "ground",
"reference", and "active". The reference (the way
I was taught to use the system) is clipped and pasted
to the upper part of the ear, whereas the ground is
clipped and pasted to the earlobes. It appears that
those grounds, (left and right connected together,)
_are_ the DRL of the EEG system. The biosemi DRL
originated in the _heart_ monitoring case, and seems
to come from the standard practice in _that_ realm.
Using the earlobes might mitigate your oscillations.
- Lenny Gray -
This archive was generated by hypermail 2.1.4 : 2002-07-27 12:28:36 BST