filter representation

[luz2]

Hello, I can't understand filters in Labview, help me please!. In the file before is first of all the signal that I'm trying filter, and its FFT.

Using filter 1 (bandpass from 0.001Hz to 30Hz ) I obtain the signal that you can see, and I don't understand nothing!!!!!!!!!!because frequencies until 150 pass without loads. Can you help me?Please, I can't understand.

Thanks

Luz

[DSPmchen]

Hi, Luz,

From your word file, I see the spec of Filer1 you use. The sampling freq is 5000Hz, while the pass band is about 30Hz. The pass band is quite narrow. However, the filter order is only 10. So it must have very broad transition band. In other words, the frequency response of this filter is very poor.

Would you please attach your VI and data?

Thanks.

[JaimeC]

Hi luz,

You opened around 5 forums questions about filters,

I answered you at that one:

http://forums.ni.com/ni/board/message?board.id=170&message.id=178057

So read that and probably would help you to understand,

Regards,

Jaime Cabrera

NI Applications Engineering