Soft dB Opus Suite Data Logger Module - Manual (Page 44)

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The frequency response graph represents the filter response for the current filter parameters. You
don’t have to use any button to update the frequency response graph; the graph is automatically
updated when the filter parameters change. The filter parameters are described in the following
table:
Filter Parameters Description
There are five available filter types: 1) ButterWorth 2) Chebyshev
3) Inverse Chebyshev 4) Elliptic and 5) Bessel.
The filter function control allows selecting a Lowpass, Highpass,
Bandpass or Bandstop filter. When a Lowpass or Highpass filter is
selected, only the Fc low parameter is available. The Fc high parameter
is available for the Bandpass and Bandstop selections only.
This parameter allows specifying the cut-off frequency of Lowpass and
HighPass filters and the low cut-off frequency of Bandpass and
Bandstop filters.
This parameter allows specifying the high cut-off frequency of the
Bandpass and Bandstop filters. This parameter is not used for the
Lowpass and Highpass selections.
This is the filter order. This parameter is available for all filter type
selections.
This parameter is used only for the Elliptic and Chebyshev filter types.
This parameter is the tolerable passband ripple of the filter. It must be
greater than zero and expressed in decibels.