What is the difference between the different filters that are predefined in Labview(equi-ripple, FIR, Butterworth,etc). How do I get their freq responses?

[Ronak]

Which filter should I use if I am trying to design a Bandpass filter for a passband freq range between 50-100Hz? I don't understand the difference betweenthe equi-ripple,butterworth and fir filters. I thought that I could use any one of these. Is there any way to find the frequency responces of the predefined Filters that are available on labview.

[LocalDSP]

The actual frequency response of your filter is returned by the VI as "filter information". It is a cluster that contains both the magnitude and phase responses of your filter so you can for example unbundle the magnitude cluster and simply pass it to a waveform graph.

You can find more details on the difference between the different filters in the LabVIEW Analysis Concept manual. Go to Start>>Programs>>National Instruments>>LabVIEW x.y>>>Search the LabVIEW Bookshelf. Then in the Concept and Techniques section select the Analysis Concept document (name may vary depending on your LabVIEW version). There you'll find a chapter on Digital Filters.