Hi,
I have a question for the EEG signal that is being recorded in a single channel EEG. is the final signal recorded/viewed on the GUI
a) Signal - (average of BIAS+SRB2)
or
b)Signal - (Bias-SRB2)
All EEG, EMG, ECG is differentially measured. In the default common reference condition, SRB2 acts like a signal bus for all the positive pins (IN1P through IN8P). Then the INxN per-channel pins are measured differentially against that reference bus.
Bias pin does not participate in the differential measurement at all. It is only used as a 'Ground' potential to center the differential amplifiers, and also to inject some small anti-mains out of phase current, to counter the strong mains influence.
Comments
Tuan, hi.
All EEG, EMG, ECG is differentially measured. In the default common reference condition, SRB2 acts like a signal bus for all the positive pins (IN1P through IN8P). Then the INxN per-channel pins are measured differentially against that reference bus.
Bias pin does not participate in the differential measurement at all. It is only used as a 'Ground' potential to center the differential amplifiers, and also to inject some small anti-mains out of phase current, to counter the strong mains influence.
No 'averaging' of the channels is done.
Regards, William