User`s manual

138
4.9: COEFFICIENT DISPLAY WINDOW
Application:
Particularly when setting up the Ref Canceller filter, it is often useful to display the impulse
response (filter coefficients) of the filter. Additionally, it is sometimes desirable to know the
precise time-domain response of any of the General Filter stages. For these reasons, the
Coefficient Display window has been provided.
The Filter stage to be displayed is specified in the Filter combo box within the Display block
by clicking on the desired Filter. The number of filter coefficients to be displayed is specified
by the Number of Coefficients control by clicking on the desired number; this causes the
specified number of coefficients to be horizontally scaled to fit within the available display
area. Regardless of the length of the Filter, the last selection in the combo box causes all
coefficients in that Filter to be displayed.
Vertical scaling of the Filter's coefficients for display is accomplished by clicking on the
desired Zoom factor. Supported Zoom factors range from 1X to 200X.
A moveable Marker allows Time, Value, and Coefficient number readout at any point in the
Coefficient Display. The marker can be turned on and off; also, the visualization grid can be
turned on and off as needed.
Finally, the Coefficient Display window is fully sizeable, and can utilize all the available
display area for viewing if desired. Controls can be hidden using the Hide Controls checkbox,
and printouts can be generated using the Print button.