Using the matlab fda tool for designing a notch filter

Creating a 50 Hz notch filter for data collected at 1500 HZ.

The following parameters were entered into the Matlab fda tool for designing filters.

Filter Type= band stop

Design Method= IIR Butterworth

Filter Order Specify Order= 2

Frequency Specifications Fs= 1500 Hz , Fc1=48, Fc2=52

Under the menu option in the fdatool, select Convert To Single Section

The Single Section, Direct Form II coefficients from Matlab are:

Numerator: 0.9916918276 , -1.9401100454 , 0.9916918276

Denominator: 1.0 , -1.9401100454 , 0.983383655

This translates into the following Visual3D plugin coefficients

/A0=0.9916918276

/A1=-1.9401100454

/A2=0.9916918276

/B1=1.9401100454

/B2=-0.983383655

These coefficients are entered into the following Visual3D command

Butterworth_Filter

! /SIGNAL_TYPES=

! /SIGNAL_FOLDER=ORIGINAL

! /SIGNAL_NAMES=

! /RESULT_FOLDER=PROCESSED

! /RESULT_SUFFIX=

/A0=0.9916918276

/A1=-1.9401100454

/A2=0.9916918276

/B1=1.9401100454

/B2=-0.983383655

! /NUM_REFLECTED=50

! /TOTAL_BUFFER_SIZE=50

! /NUM_BIDIRECTIONAL_PASSES=1

;