Trouble shooting

Noise on all electrodes of the same board:

Tgis is certainly due to scalp electrode on th board that are not properly set on the patient. If they are loose, they contaminated the whole board when they move.

Solutions:

• scalp electrodes should be on the separate board
• if they share a board with macroelectrodes they should be unplugged if they are not properly fixed on the patient

50 Hz noise on micros because of the bed