Overview, Front Panel, Back Panel

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 indicated 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 buttons 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 but- tons to suspend feedback reducer operation and remove feed- back filters from the audio path. When a Bypass LED illumi- nates, feedback 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 ex- isting 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 is ap- plied to the DFR22.

Back Panel

U.S. PATENT NO. 5,999,631

OTHER PATENT PROTECTION

APPLIED FOR

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 de- vices, which may be accessed by a computer.

3.3-PinRS-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 Connections section.

5.DIP Switches. Use Switches 1–4 to select a Shure Link De- vice ID. Use Switch 5 to lock or unlock front panel controls. Re- fer to the Front Panel Lockout section for information on lock- ing front panel controls.

6.Output Connectors (Phoenix). These active, cross– coupled, balanced outputs can be used with balanced or un- balanced inputs. They can be switched between +4 dBu/–10 dBV line–level operation, using the DFR22 software. Refer to the Audio Connections section.

7.Output Connectors ( XLR). These active, cross–coupled, balanced outputs can be used with balanced or unbalanced in- puts. They can be switched between +4 dBu/–10 dBV line–lev- el operation 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 can- not be used simultaneously with an XLR connector for the same input. They can be switched between +4 dBu/–10 dBV line–level operation 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 in- put. They can be switched between +4 dBu/–10 dBV line–level operation using the DFR22 software. See Audio Connections section for more information.