User's Manual

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Specifications are subject to change without notice.
User GuideBlueBridge Designer II
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: [phone] • Fax: [phone]
Auto Feedback Suppression - The Auto Feedback Suppression module creates a notch filter around loud frequencies to eliminate
Feedback. There are eight bands that automatically adjust to create the filters as necassary. Certain master parameters used to fine
tune the module are described below.The Threshold (-100dB to 10 dB, 0.1dB steps) parameter is the minimum level before suppression
will occur. The lower the Sensitivity (very low, low, medium, high very high) the higher the level of the offending tone needs to be
before suppression. Maximum Depth (0dB to 40 dB, 0.01dB steps) sets the largest amount of attenuation applied to the offending tone.
Notch Step Size (0.5dB to 3 dB, 0.01dB steps) sets the rate Maximum Depth is reached. The starting minimum bandwidth of the filter
provided is set by Default Bandwidth. Recycle Delay (0.1hr to 100hr dB, 0.01dB steps) is the minimum length of time a notch filter is
held before the attenuation is reduced by the Notch Step Size. Use Recycle Enable to activate Recycle Delay. Level, Frequency and
Bandwidth for each band are displayed in the module. Use Type to switch between Dynamic (Dyn) and Fixed filter types.
Fig 86