Tips for best signal acquisition

• When recording biopotential signals (EEG, ECG, EOG, or EMG), ensure your laptop is not connected to its charger and maintain a minimum distance of 5 meters from any AC-powered appliances (e.g., motors, refrigerators) to minimize interference noise and get better signal acquisition. Our body is essentially a “bag of salt water”, when electodes are connected to our body it acts like an antenna picking up surrounding electromagnetic signals also known as Radio/AC interference noise. This interference noise includes radio waves (usually filtered in hardware) and 50Hz/60Hz AC noise from appliances, which is typically removed through software filtering.

  

  tip for better signal acquisition

• Before placing electrodes on your body, prepare your skin thoroughly using Nuprep skin preparation gel to remove dead skin cells, oils, & other substances. This will enhance the connection of electrodes to the skin surface and also decrease the skin-electrode impedance which results in better signal acquisition. For more information, you can check out the complete Skin Preparation Guide.

• The electrode placements are different for recording different biopotential signals. So make sure you are placing the electrodes at the correct positions. For more information, you can check out gel electrodes usage guide.

• Gel electrodes are meant to be used only once and then discarded afterwards.

• Ensure that gel electrodes are properly in contact with the skin. If the electrodes start to peel off during extended use, it’s time to replace them with new ones. Usually it happens when you are sweating.

• Sit stable while recording the biopotential signals as swinging or moving BioAmp Cable can induce cable movement noise.