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Determine the Cut-off frequency of Low Pass Filter

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Hi,

 

Have a class assignment where we are given a subVI "dlsimfilter2" with a Voltage and Amplitude Input and a Voltage ouput, which is a low pass filter.

 

The object of the assignment is to determine the cut-off frequency of the filter itself using whatever method deemed appropriate. My solution uses the cut off as .707 of the output voltage to determine the cut off frequency.I use a boolean led to activate once this value is reached and then that triggers the casee loop to determine and display the maximum value that the frequency was at.

 

Just looking for thoughts on how I could tidy up the solution so that i could replace the dlsimfilter easily with another low pass filter quickly without too much re-wiring as that is the next step. There are other filters that need to be tested sequentially.

 

G2S


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