Hi,
Just looking for advise on the best way to measure superimposed frequencies on my raw data. The raw data (voltage versus time) is ultimately a noisy sine wave with a frequency of 1Hz. I need to determine where the noise is coming from, i.e. is it vibrational, electrical or surrounding noise, hence requiring the frequency of the noise if possible.
Any advise on the best way of filtering the data would be appreciated. Currently I am using a butterworth filter with a cutoff setting of 1.5Hz. The original data was sampled at 1.5KHz so the noise was measured and so could be filtered during postprocessing.
Also when filtering I don't want to loose important data i.e. sudden peaks or drops.
Regards,
John.