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Shure DFR11EQ User Manual

Digital feedback reducer and graphic equalizer with software interface for windows
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See also: User Manual , Quick Reference Manual
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Shure Brothers Incorporated
222 Hartrey Avenue
Evanston IL 60202-3696 U.S.A.
Model DFR11EQ User Guide
DFR11EQ
Digital Feedback Reducer and Graphic Equalizer
*
With Software Interface for Windows
1996, Shure Brothers Inc.
27A8523 (PJ)
Printed in U.S.A.

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  • Page 1 Main Menu Shure Brothers Incorporated 222 Hartrey Avenue Evanston IL 60202-3696 U.S.A. Model DFR11EQ User Guide DFR11EQ Digital Feedback Reducer and Graphic Equalizer With Software Interface for Windows 1996, Shure Brothers Inc. 27A8523 (PJ) Printed in U.S.A.

  • Page 2: Table Of Contents

    ............... . *Trademark Notifications Shure is a registered trademark of Shure Brothers, Inc. Windows is a registered trademark of Microsoft Corporation. Crystal is a trademark of Crystal Semiconductor Corporation.

  • Page 3: Introduction

    The DFR11EQ is designed for installed sound reinforcement applications: theater, conference rooms, meeting halls, etc. The DFR11EQ is also an effective setup tool for controlling major feedback modes in live music applications.

  • Page 4: The Dfr11Eq

    9-Pin RS-232 Port. Connects the unit to a switch. -Inch and XLR are driven independently computer. For use with DFR11EQ software and for and either can be balanced or unbalanced without DSP firmware upgrades. affecting the other. Input Connector—Combined XLR and -Inch.

  • Page 5: Dip Switches

    –10 dBV Shure Link Device ID When multiple DFR11EQ’s are linked, each one is assigned a Link Device ID, 0 through 15. DIP switches 1 through 4 on the rear panel are used to set the Link Device ID. To change the Device ID, align the switches according to the illustrations below.

  • Page 6: Dfr11Eq Theory

    After the DFR11EQ stops the feedback at one frequency, the sound system may start feeding back at another frequency. In this case, the DFR11EQ inserts another notch filter into the audio path at the new frequency. The DFR11EQ can insert a total of 10 notch filters to reduce feedback.
  • Page 7 10 filters have been set. After all 10 notch filters are set and a new feedback frequency is detected, the DFR11EQ will remove the oldest set dynamic filter and re-deploy it at the new feedback frequency. The fixed filters remain unchanged.

  • Page 8: Setup For Feedback Control

    WARNING: Other equipment may potentially be damaged after DFR11EQ power off if the DFR11EQ input is set to +4 and the output is set to –10. If the DFR11EQ input is set to +4 and the output is set to –10, then the DFR11EQ is acting as an attenuator, lowering the signal to the proper level for the power amplifier.

  • Page 9: Connecting The Dfr11Eq In A Sound System

    Connecting the DFR11EQ in a Sound System The DFR11EQ should be placed where an equalizer would be in a signal path — it should be the final piece of equipment a sound signal passes through before going to a power amplifier.
  • Page 10 Inserted Between Mixer and Monitor Since monitor loudspeakers and microphones are usually in close proximity, the DFR11EQ can be connected to stabilize a monitor system. Place a DFR11EQ on the aux output which goes to the monitor loudspeaker. For multiple monitor mixes, a DFR11EQ should be placed at the output of each monitor send.

  • Page 11: Computer Interface

    Overview This section describes the Windows based computer interface software which allows you to utilize the full features of the Shure DFR11EQ. By connecting the DFR11EQ to your computer, you can access additional control features to customize the operating characteristics of the feedback filters. The computer interface also allows access to the built-in digital, 30-band, -octave, constant-Q, graphic equalizer.
  • Page 12 NOTE: Multiple units can be assigned the same Device ID, enabling those units to be controlled simultaneously. 2. Using the supplied 5-pin DIN cable, connect the Shure Link OUT of the first unit (the one connected directly to the computer) to the Shure Link IN of the next unit. Repeat this connection for each unit to be networked.

  • Page 13: Software Functions

    Feedback Reducer Panel. The Feedback Reducer Panel contains many of the same controls available on the front panel of the DFR11EQ. In addition, the Feedback Reducer panel allows you to view the Frequency Response Curves. The Frequency...

  • Page 14: Using The Feedback Reducer Panel

    This is identical to the rear panel EQ Bypass DIP switch. Mute Button and LED To mute the audio signal of the DFR11EQ, click on the MUTE button. The LED will illuminate and no sound will pass through. Clear Filters Button and LED Click on the CLEAR button to clear all feedback filters.

  • Page 15: Using The Graphic Equalizer

    Main Menu Using the Graphic Equalizer Adjusting Bands The DFR11EQ graphic equalizer looks and functions just like a conventional graphic equalizer. Each slider controls a -octave band centered around the frequency indicated above each slider. When a slider is selected, the center of the slider turns green.

  • Page 16: Viewing Response Curves

    Clicking on the BOTH button displays the composite response of the graphic equalizer and the deployed feedback filters. Here you can see how the equalized sound is affected by the feedback filters. Exiting the DFR11EQ Application To Exit 1. Click on File in the main menu bar.

  • Page 17: Accessing Connected Dfr11Eqs

    4. In the DFR1 1EQ Serial Port window, select an available COM port on the computer. 5. Click on the OK button. NOTE: The COM port selection is saved in the DFR11EQ file, and will not need to be selected again unless you need to change the hardware configuration.

  • Page 18: Dfr11Eq Settings

    Locking the Front Panel... Clicking on the Front panel lockout box will deactivate the front panel buttons of the DFR11EQ hardware. Lockout is indicated by an X in the box. The Front Panel lockout does not affect the Power button.

  • Page 19: Scenes

    Main Menu Scenes Once a DFR11EQ has been set up with a desired combination of settings, they can be stored on disk as a Scene. Although the DFR11EQ automatically saves the current scene in internal memory, other scenes can be saved to disk. Scenes are useful for reducing setup time when multiple units require similar settings.

  • Page 20: Appendices

    +6 dBu minimum (at –10 dBV setting) CERTIFICATIONS Total Harmonic Distortion DFR11EQ: UL Listed and cUL Listed to UL 813 and CSA < 0.05% at 1 kHz, +4 dBu, 20 to 20 kHz C22.2 No. 1. Authorized under Verification provision of LED Signal Indicators FCC Part 15 as a Class B Digital Device.

  • Page 21: Appendix B. Rack Mounting The Dfr11Eq

    Main Menu Appendix B. Rack Mounting the DFR11EQ The DFR11EQ comes in a -rack chassis specially designed for sturdiness. The sagging and bending found in most -rack designs is eliminated — the brackets and straddle bars are designed to ensure that the units will be installed securely.

  • Page 22: Appendix C. Connectors And Cables

    Main Menu Appendix C. Connectors and Cables NOTE: Except for the Shure Link cable, none of the cables shown come supplied with the DFR11EQ. Audio Connectors DFR11EQ Audio Output DFR11EQ Audio Input Connector: XLR (male) 1/4-inch Connector: XLR (female) 1/4-inch...
  • Page 23 Main Menu -in. to -in. Balanced – SLEEVE RING TYPICAL APPLICA TIONS Mixer Line Out to DFR11EQ Input DFR11EQ Output to Amplifier Input DFR11EQ Output to Mixer Sub Return – SLEEVE RING Mixer Send to DFR11EQ Input Mixer Sub Send to DFR11EQ Input DFR11EQ Output to Mixer Sub Return -in.
  • Page 24 Main Menu XLR (female) to -in. Balanced PIN 1 PIN 2 TYPICAL APPLICA TIONS Mixer Line Out to DFR11EQ Input DFR11EQ Output to Amplifier Input – DFR11EQ Output to Mixer Sub Return PIN 3 Mixer Send to DFR11EQ Input SLEEVE –...

  • Page 25: Digital Connectors And Cables

    TO COMPUTER 17 19 21 23 25 COMPUTER 25-PIN RS-232 CONNECTOR (MALE) 9-PIN MALE — TO DFR11EQ DFR11EQ RS-232 CONNECTOR FEMALE Shure Link Cable — 5-Pin DIN Cable (MIDI-compatible cable) FUNCTION PIN # — DATA SHIELD SHURE LINK IN DATA —...

  • Page 26: Appendix D. Warranty

    Your letter should include all pertinent details including applicable model or part numbers and a brief description of the problem. Do not mail any units or parts to Shure unless requested to do so by Shure’s Service Department. Any returned items must have prior authorization.
  • Page 27 Main Menu Notes...
  • Page 28 Main Menu The Sound of Professionals...Worldwide Shure Brothers Incorporated 222 Hartrey Avenue Evanston, IL 60202–3696 U.S.A.

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