Chebyshev Coefficients (Not in Base Package)

Generates the set of filter coefficients to implement an IIR filter as specified by the Chebyshev filter model. You can pass these coefficients to the IIR Cascade Filter VI to filter a sequence of data. Details

filter type specifies the passband of the filter.

0Lowpass
1Highpass
2Bandpass
3Bandstop
sampling freq: fs is the sampling frequency and must be greater than zero. The default is 1.0.
high cutoff freq: fh is the high cutoff frequency. The VI ignores this parameter when filter type is 0 (Lowpass) or 1 (Highpass). When filter type is 2 (Bandpass) or 3 (Bandstop), high cutoff freq: fh must be greater than low cutoff freq: fl.
low cutoff freq: fl is the low cutoff frequency and must observe the Nyquist criterion.

where is the cutoff frequency, and is the sampling frequency.

Note  All cutoff frequencies must be less than half .
ripple is the ripple in the passband. ripple must be greater than zero and expressed in decibels. The default is 0.1.
order is the order of the IIR filter and must be greater than zero.
IIR Filter Cluster contains three elements: filter structure, Reverse Coefficients, and Forward Coefficients.
filter structure indicates either IIR second-order or IIR fourth-order filter stages.
Reverse Coefficients is the reverse coefficients of the IIR cascade filter.
Forward Coefficients is the forward coefficients of the IIR cascade filter.
error returns any error or warning from the VI. Refer to Signal Processing Error Codes for more information about these conditions.

Chebyshev Coefficients Details

Refer to Chebyshev Filters for more information designing and using Chebyshev filters. The Chebyshev Coefficients VI is a subVI of the Chebyshev Filter VI.