I have a question about my program . I do these steps :
first , I input the signal.
second , I filtered the signal. (filter type : butterworth , band pass filter , 10 ~ 500Hz)
third , I put the filtered signal into discrete wavelet transform vi , and it output on waveform.
forth, To see the signal clearly , I use the array subset vi to cut the length
(40000 points , 20000 points , 10000 points , 10000 points , they are four parts)
But , it's very weird when I see it's frequency . It should be (500Hz ~ 250Hz) , (250Hz~125Hz) , (125Hz~62.5Hz) , (62.5Hz ~ 10Hz) like the picture 2 .
So , I find the help of discrete wavelet transform vi , and I find the picture 1 to see it . I try to use the analysis filter of discrete wavelet transform vi but the result of it is more weird.
I have no idea how to dealing these four parts frequency .
Who can give some suggestions？
I put the input signal , vi program , picture 1 and picture 2 under the article.
