User`s manual

4.4.1.1: Storing Adaptive Filter Settings and Coefficients

This section relates to both the Reference Canceller and the 1-Channel Adaptive Filter. Each of

these filters allows the user to store the filter settings of the adaptive filter as well as the

coefficients stored within the filter.

When clicking the Store button a window will appear (Figure 4-16) displaying the current

working folder and showing all the previously stored adaptive filter settings files. If there have

been no previous settings stored then no other files will be listed. These files have the extension

“*.cof”. Coefficients stored from a 1-Channel filter can be loaded by a Reference Canceller and

vice versa, although this is not recommended.

Figure 4-16 Adaptive Filter Store Settings Window

Before the OK button will be enabled a valid settings file name must be entered. Once a valid

name is entered, click OK to store the adaptive filter settings. All details about the filter will be

stored, including it’s number of taps and the value of each coefficient. After clicking OK, wait a

few moments as the coefficients are downloaded from the PCAP II Plus. The filter will be frozen

(adaptation will be disabled) while this download takes place.

4.4.1.2: Recalling Adaptive Filter Settings and Coefficients

This section relates to both the Reference Canceller and the 1-Channel Adaptive Filter. Each of

these filters allows the user to recall the filter settings of the adaptive filter as well as the

coefficients stored within the filter.

To recall an adaptive filter’s settings, click the Recall button on the adaptive filter’s configuration

window. After clicking the button the Recall window will appear (Figure 4-17) displaying the