There was a typo in the documentation, thanks for pointing it out! it’s now been corrected to uV as it should be.
You’ll notice that the signal are offset by about 825 uV. This is a peculiarity of the hardware design, but it doesn’t affect the measurements. To get rid of that offset, you can do the following:
- Compute mean amplitude of each channel (over entire recording, or part of it)
- Subtract the mean amplitude from each respective channel
Your EEG signals will be centered around 0 uV, and have a range of approximately 100-200 uV.
Finally, the method that you describe will “compress” the data so that values that fall between (mean - originalMin) and (mean + originalMax) now fall between newMin and newMax. It can be useful depending on your application, but does not achieve the same thing as the method described above, which only makes sure your data is centered around 0 uV.