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English
OVERVIEW
Front Panel
DFR22 FRONT PANEL
FIGURE 1
1.
INPUT/OUTPUT Level Meters:
•
CLIP.
Illuminates at 3 dB below clipping level.
•
0 VU
.
+4 dBu, -10 dBV; software selectable
. 0 dB is equal to +4
dBu by default. If the input or output sensitivity is changed to -10
dBV using the DFR22 software, 0 dB equals -10 dBV.
•
–20 dB.
Illuminates when the signal meets or exceeds the indi-
cated level.
•
MUTE.
Illuminates when input or output is muted.
2.
DFR Filter LEDs
. Illuminate when individual feedback filters are
active. When a filter changes or is added, an LED flashes, then
stays on.
3.
AUTO CLEAR Buttons and LEDs.
Press and release these but-
tons to configure Auto Clear mode for each channel. Press them
again to activate Auto Clear. When an Auto Clear LED illuminates,
Auto Clear is active on its corresponding channel.
4.
PRESS TO LOCK / HOLD TO CLEAR Button and LEDs.
Press
this button to lock filters at their current values. Holding this button
down will reset all feedback filters, even if they are locked. The
LED lights to indicate that the lock is active.
5.
BYPASS DFR FILTERS Button and LEDs.
Press these buttons
to suspend feedback reducer operation and remove feedback fil-
ters from the audio path. When a Bypass LED illuminates, feed-
back reduction is bypassed on the corresponding channel.
Bypass does not affect other processors (such as equalizers,
delay, limiters, etc.).
6.
LOAD Button.
Press this button to activate a selected preset.
7.
PRESET Indicator.
Shows the number of the currently active
preset. Blinks to show the number of the other presets in the
DFR22 when pressing the SELECT buttons.
8.
SELECT Buttons.
Press to scroll through the presets stored in
the DFR22.
9.
COMM LED.
Flashes in unison with the feedback filter LEDs
when the detector is deploying a new filter or changing an existing
one, and also blinks whenever the unit is communicating with a
connected computer.
10.
RS232 Port.
Connects the DFR22 to a computer.
11.
POWER LED.
Illuminates when 100-240 VAC power is applied to
the DFR22.
Back Panel
DFR22 REAR PANEL
FIGURE 2
1.
Power Connector.
Connects to 100-240 VAC power.
2.
Shure Link Interface.
Allows linking of up to 16 Shure Link
devices, which may be accessed by a computer.
3.
3-Pin RS-232 Port.
Connects the DFR22 to a computer. For use
with DFR22 software and control systems. Refer to the Computer
Connections section.
4.
CONTROL IN Pins
. Use control input pins for remote control of
preset switching, muting, and gain. Refer to the Control Pin Con-
nections section.
5.
DIP Switches.
Use Switches 1-4 to select a Shure Link Device
ID. Use Switch 5 to lock or unlock front panel controls. Refer to
the Front Panel Lockout section for information on locking front
panel controls.
6.
Output Connectors (Phoenix).
These active, cross-coupled,
balanced outputs can be used with balanced or unbalanced
inputs. They can be switched b4 dBu/-10 dBV line-level
operation, using the DFR22 software. Refer to the Audio Connec-
tions section.
7.
Output Connectors (XLR).
These active, cross-coupled, bal-
anced outputs can be used with balanced or unbalanced inputs.
They can be switched b4 dBu/-10 dBV line-level opera-
tion using the DFR22 software. Refer to the Audio Connections
section.
8.
Input Connectors (Phoenix)
. These active balanced inputs can
be used with balanced or unbalanced outputs. They cannot be
used simultaneously with an XLR connector for the same input.
They can be switched b4 dBu/-10 dBV line-level opera-
tion using the DFR22 software. Refer to the Audio Connections
section.
9.
Input Connectors (XLR).
These active balanced inputs can be
used with balanced or unbalanced outputs. They cannot be used
simultaneously with a Phoenix connector for the same input. They
can be switched b4 dBu/-10 dBV line-level operation
using the DFR22 software. See Audio Connections section for
more information.
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Summary of Contents for DFR22AZ
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