FIR filter supports arbitrary range of frequency
sampling method , and Rectangle, bartlett, triangular,
cosine, hanning, bartlett_hanning, hamming, blackman,
blackman_Harris, tukey, Nuttall, FlatTop, Bohman,
Parzen, Lanczos, kaiser, gaussand dolph_chebyshev,
window method design.
IIR filter support "Butterworth", "Chebyshev I",
"Chebyshev II", "Elliptic" type of filter design
Note: The oscilloscope factory calibration, if you are not satisfied with the
measurements, can manual calibration, the specific reference oscilloscope
instructions.
Note: The specific speed recorder with computer processing speed, and if use
high sampling rate, the situation may break.