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Chapter 41
Filter VIs
The first stopband of the filter region goes from zero (DC) to lower stop freq. The passband
region goes from lower pass freq to higher pass freq, and the second stopband region goes
from higher stop freq to the Nyquist frequency.
Equiripple BandStop
Generates a bandstop FIR digital filter with equi-ripple characteristics using the
Parks-McClellan algorithm and higher pass freq, lower pass freq, # of taps, lower stop
freq, higher stop freq, and sampling frequency: fs. The VI then filters the input sequence
X to obtain the bandstop, filtered, linear-phase sequence Filtered Data.
The first passband region of the filter goes from zero (DC) to lower pass freq. The stopband
region goes from lower stop freq to higher stop freq, and the second passband region goes
from higher pass freq to the Nyquist frequency.
Equiripple HighPass
Generates a highpass FIR filter with equi-ripple characteristics using the Parks-McClellan
algorithm and # of taps, stop freq, high freq, and sampling freq. The VI then filters the input
sequence X to obtain the highpass, filtered, linear-phase sequence Filtered Data.
The stopband of the filter goes from zero (DC) to stop freq. The transition band goes from
stop freq to high freq, and the passband goes from high freq to the Nyquist frequency.
LabVIEW Function and VI Reference Manual
41-6
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