Toa M-864D Ver.2.2.0 - Manual (Page 54)

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7.5. fBS (feedback Suppressor function)
This function box is for monaural input and is used to set the FBS filter.
(1) Filter control field (2) Minimum frequency
adjustment button
(3) Maximum frequency
adjustment button
(4) Maximum amplitude
adjustment button
(5) Dynamic mode button
(6) Clear dynamic button
(7) Filter point control
(8) Filter point guard
button
(10) Graph/Table display
selector button
(9) Lock button (11) Scale setting button (12) Q indication button
(13) Minimum amplitude
adjustment button
1. filter Control field
Displays the FBS frequency characteristics when
in graph display mode. In table display mode, the
FBS filter’s parameter ON/OFF and guard settings
are displayed in table formats.
To set the display mode, click the Graph/Table
Display Selector Button (10).
(Table format display)
Select the filter point to be set in the Filter Point
Control (7) menu.
In graph display mode, protected filter point
gains and Q parameters can be changed by drag
operation.
2. Minimum frequency adjustment Button
Sets the minimum frequency for the graph display.
(Sets the left edge of a graph.)
The leftward pointing triangle button decreases
the frequency, and the rightward pointing triangle
button increases the frequency.
3. Maximum frequency adjustment Button
Sets the maximum frequency for the graph display.
(Sets the right edge of a graph.)
The leftward pointing triangle button decreases
the frequency, and the rightward pointing triangle
button increases the frequency.
4. Maximum amplitude adjustment Button
Sets the maximum amplitude for the graph display.
(Sets the upper limit of the graph.)
The downward pointing triangle button reduces the
amplitude and the upward pointing triangle button
increases the amplitude.
5. Dynamic Mode Button
Sets the dynamic FBS function ON/OFF.
Notes
• ON: When acoustic feedback is detected, the
FBS filter’s parameter is automatically
enabled, dynamically suppressing the
feedback.
• OFF: No automatic settings are performed for
the FBS filter’s parameter, and dynamic
feedback suppression is not enabled.
• Switching the button from ON to OFF clears the
filter that has been automatically created when
acoustic feedback was detected in dynamic mode.