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
HG1 & HG1-B is same time point.
HG2 & HG2-B is same time point.
HG3 & HG3-B is same time point.
HG4 & HG4-B is same time point.
Image difference 0..30 Hz VS 0..120Hz