User`s manual

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 4-17 Adaptive Filter Recall 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

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

few moments as the coefficients are uploaded from the PCAP II Plus.

NOTE: If the recalled adaptive filter settings require additional PCAP II Plus resources that

might be used by other filter stages, a warning will appear and the PCAP II Plus filter

stages will be reconfigured.

When recalling any filter settings, the existing filter settings will be stored in a file entitled

“Previous Filter Settings.cof”. This feature will allow you to reload the previous settings should

you decide they are needed.

Other files may be listed in the working folder entitled “Previous Filter 1 Settings.cof” or

“Previous Left Filter 1 Settings.cof”. These files are created when loading a PCAP II Plus

settings (“.*.dac”) file that contains adaptive filters. These file contain the settings and

coefficients from when this settings file was created.

Upon loading the adaptive filter settings and coefficients the filter will be frozen (the adaptation

will be disabled).