Hi
I have a signal with with FFT peak at 66Hz as shown ( figure at the top).
I wish to filter out this frequency.
Here's what i wish to ask:
1. Since the LabVIEW versio i am using does not have an inbuilt notch filter, i decided to use a Bandstop filter.
I feel that a precise bandstop ( very liitle stop band) can act as a notch filter or at least help in my case.
Is this true? Or notch filter cant be realized from bandstop? Am I wrong in thinking so?
2. I made a bandstop filter. gave a passband of around 3-4Hz centered at 66Hz BUT no matter what order i choose, The response no doubt filters out the the required band but adds other frequencies! (as shown- figure at the bottom)
What am I doing wrong?
applying a filter is pretty straight-forward isnt it?
Kindly help