Effacer les filtres
Effacer les filtres

Change frequency level after filter

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vu ngothanh
vu ngothanh le 14 Mai 2015
Commenté : Star Strider le 15 Mai 2015
First grahp í the source data. After I filter it, I got the grahp 2. But as you can see, in the second grahp, the yelow line(I don't know how to call it) is not the same with the 0-0 line(blue). So I want to change the frequency level from 0,5 to 0. How can I do it.
Thanks in advance

Réponse acceptée

Star Strider
Star Strider le 14 Mai 2015
You seem to be using a low-pass filter. Use a bandpass filter instead, with a low-frequency cutoff that will eliminate the D-C offset (value at 0 Hz), and with the high-frequency cutoff you used in your original low-pass filter.
  8 commentaires
vu ngothanh
vu ngothanh le 15 Mai 2015
Thank you very much. I has just fix it as you say. it work. Thank you one more time
Star Strider
Star Strider le 15 Mai 2015
My pleasure!

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