# Ganglion Input-Referred Noise?

GregoryG
Paris, France

Hi,

I am interested in using Ganglion or Cyton board to record Auditory Brainstem Response to click stimulus. To determine the feasibility, I need to know the Input-Referred Noise measured when the input is shorted together. For the Cyton board, all is in the ADS1299 datasheet on Table 1 to Table 5.

For the Ganglion board, I found 2 measured values on the forum.

The first one give a value of 1uVpp Input-Referred Noise at Fs=256Hz ("10 Minutes Noise Test Ganglion.txt")

https://github.com/OpenBCI/Ganglion-Prototype-Data

The second one give a value of 10uVpp Input-Referred Noise at Fs=256Hz

http://openbci.com/community/ganglion-review-input-noise-and-p300/

In both measurements, unfortunately the level of PGA gain is not specified... and it's obvious that gain will influence Noise value. Does someone know the value of Input-Referred Noise regarding the sampling frequency and PGA gain ?

Thanks,

I am interested in using Ganglion or Cyton board to record Auditory Brainstem Response to click stimulus. To determine the feasibility, I need to know the Input-Referred Noise measured when the input is shorted together. For the Cyton board, all is in the ADS1299 datasheet on Table 1 to Table 5.

For the Ganglion board, I found 2 measured values on the forum.

The first one give a value of 1uVpp Input-Referred Noise at Fs=256Hz ("10 Minutes Noise Test Ganglion.txt")

https://github.com/OpenBCI/Ganglion-Prototype-Data

The second one give a value of 10uVpp Input-Referred Noise at Fs=256Hz

http://openbci.com/community/ganglion-review-input-noise-and-p300/

In both measurements, unfortunately the level of PGA gain is not specified... and it's obvious that gain will influence Noise value. Does someone know the value of Input-Referred Noise regarding the sampling frequency and PGA gain ?

Thanks,

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