butterworth filter frequencies

[gareth1983]

Attached file shows the butterworth filter which I had implemented. I realise there's an error whenever the sampling frequency is less than 2f, by Nyquist theorem. Is there anyway I can do to make sure that the error message don't pop up, for example, if the sampling frequency is less than 2f, the connecting lines won't be able to connect.

I believe this applies to all filters and not only Butterworth.

[tinnitus]

hello,

with values used actually error is not on filter but with signal generator, 

i don't know exactly how you can have Fs> Fe/2 but if you want to intercept error,

you can use clear error in dialog palette to prevent popup error message

@+

Tinnitus

[ade77]

gareth1983 ,

The best way to go about it is to use bundle by name  cluster that contains the signal parameters and signal information as shown below. Then use a property node to force the relationship between the sampling freq and the signal freq. If you can not complete it let me know.

[S.AHMAD]

Hi,

Yes ,I agree with other discussion on forum.It is due to setting on the sine wave signal generator not on filter.If you want not to set the value <2fs then you can use the property node to restrict the setting.I attached the screen shoot of the filter setting.

Regards.

S.Ahmad