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© 2003 Shure Incorporated DFR22 Software Guide 68
Digital Feedback Reducer (DFR)
Bypass
Click to disengage DFR notch filtering. Bypass also locks the DFR, preventing deployment of new filters. When
bypass is active, the button appears lighted in red. The default setting is inactive.
Clear
Click this button to clear filter settings. It opens the “Clear” dialog (Figure 7-20 on page 85), which
provides you with the option to clear all filter settings, or to clear only selected filter settings.
Auto Clear
Click this button to open the “Auto Clear” dialog, as described on page 72. This feature allows you to specify if
and when the DFR should clear the dynamic filters that it has allocated, and remove changes to fixed filter
depth. The button appears lighted in green when this feature is active. The default setting is inactive.
Front Panel
Use this control to assign the DFR processor to the front panel LEDs and controls. When a
DFR is assigned to the front panel, active filters will light the LEDs on the row(s) you have
specified and the front panel buttons will control the processor. For a description of the front
panel buttons, refer to the Installation Guide. Only one DFR can be assigned to any given row of the front
panel. The default setting is “Unassigned.”
Snapshot
This feature allows you to freeze an image of the current response curve by clicking the [TAKE] but-
ton and then display it in the background for comparison by clicking the [
SHOW] button. The [SHOW]
button appears lighted in green when the snapshot is displayed. For a more in-depth description of
the snapshot feature, see the Snapshots section on page 35.
Bypass active
Bypass inactive
Auto clear active
Auto clear inactive
Processor Settings
Mono DFR
[Unassigned]
[Row A]
[Row B]
Stereo DFR
[Unassigned]
[Rows A & B]
Note: In the signal flow diagram, when you copy and paste a DFR block that is assigned to the front
panel, the new pasted block will not be assigned. When you cut and paste a DFR block that has
been assigned to the front panel, it remains assigned.