Image difference 0..30Hz VS 0..120Hz
Image difference 0..30Hz VS 0..120Hz
Sampling = 480 Hz.
HG1, HG2, HG3, HG4: 256 FFT to show 0..120Hz
HG1-B, HG2 -B, HG3 -B, HG4 -B: 1024 FFT to show 0..30Hz
HG1x & HG1x-B is same time point.
HG2x & HG2x-B is same time point.
HG3x & HG3x-B is same time point.
HG4x & HG4x-B is same time point.
Image difference 0..30 Hz VS 0..120Hz