Shure DFR22 User Manual

DFR22

Audio Processor

with Feedback Reduction

200 Shure Incorporated
27B8813 (Rev. )

Printed in U.S.A.

! IMPORTANT SAFETY INSTRUCTIONS !

WARNING: This product contains a chemical known to the State of California to cause cancer and birth

defects or other reproductive harm.

1. READ these instructions.

2. KEEP these instructions.

3. HEED all warnings.

4. FOLLOW all instructions.

5. DO NOT use this apparatus n ear water.

6. CLEAN ONLY with dry cloth.

7. DO NOT block any ventilati on openings. Install in accordance with the manu­facturer's instructions.

8. DO NOT install near any heat sources such as radiators, heat registers, stoves,
or other apparatus (including amplifiers) that produce heat.

9. DO NOT defeat the safety purpose of the polarized or grounding-type plug. A
polarized plug has two blades with one wider than the other. A grounding type
plug has two blades and a third grounding prong. The wider blade or the third
prong are provided for your safety. If the provided plug does not fit into your out­let, consult an electrician for replacement of the obsolete outlet.

10. PROTECT the power cord from being walked on or pinched, particularly at plugs,
convenience receptacles, and the point where they exit from the apparatus.

11. ONLY USE attachments/accessories specified by the manufacturer.

12.

13. UNPLUG this apparatus during lightning storms or when unused for long p eriods of
time.

14. REFER all servicing to qualified servi c e personnel. Servicing is required when the
apparatus has been da m ag ed in an y way, su ch a s p ower-supply cord or plug is dam ­aged, liquid has been spill ed or ob jec ts have fallen into the ap paratus, the apparatus
has been exposed to rain or mo isture, does not operate normally, or has been
dropped.

15. DO NOT expose the apparatus to dripping and splashing . DO NOT put objects filled
with liquids, such as vases, on the apparatus.

16. The MAINS plu g or an appliance coupler shall remain readily ope rable.

17. The airborne noise of the apparatus does not exceed 70dB (A).

18. Apparatus with CLASS I construction shall be connected to a MAINS socket outlet
with a protective earthing connection.

19. T o reduce t he risk of fi re or electr ic shock, do not expose this app aratus t o rain or
moisture.

20. Do not attempt to modify this product. Doing so could result in personal injury
and/or product failure.

This symbol indicates that there are important operating and
maintenance instructions i n t he lite ra ture a cco m panying this unit.

WARNING:

Voltages in this equipment are hazardous to life. No user-serviceable parts inside. Refer all servicing to qualified service personnel. The

safety certifications do not apply when the operating voltage is changed from the factory setting.

USE only with a cart, stand, trip od, brac ket, or t abl e
specified by the manufacturer, or sold with the
apparatus. When a cart is used, use caution when
moving the cart/apparatus combination to avoid
injury from tip-over.

This symbol indicates that dangerous voltage constituting a
risk of electric shock is present within this unit.

! CONSIGNES DE SÉCURITÉ IMPORTANTES !

1. LIRE ces consignes.

2. CONSERVER ces consignes.

3. OBSERVER tous les avertissements.

4. SUIVRE toutes les consignes.

5. NE PAS utiliser cet appareil à proximité de l'eau.

6. NETTOYER UNIQUEMENT avec un chiffon sec.

7. NE PAS obstruer les ouvertures de ventilation. Installer en respectant les con­signes du fabricant.

8. Ne pas installer à proximité d'une source de chaleur telle qu'un radiateur, une
bouche de chaleur, un poêle ou d'autres appareils (dont les amplificateurs) pro­duisant de la chaleur.

9. NE PAS détériorer la sécurité de la fiche polarisée ou de la fiche de terre. Une
fiche polarisée comporte deux lames dont l'une est plus large que l'autre. Une
fiche de terre comporte deux lam es et un e tr ois i èm e b roc he de mise à la terre.
La lame la plus large ou la troisième broche assure la sécurité de l'utilisateur. Si
la fiche fournie ne s'adapte p as à la pr ise é lect rique , dema nder à un é lect ricie n
de remplacer la prise hors normes.

10. PROTÉGER le cordon d'alimentation afin que personne ne marche dessus et
que rien ne le pince, en particulier au niveau des fiches, des pris es de courant
et du point de sortie de l'appareil.

11. UTILISER UNIQUEMENT les accessoires spécifiés par le fabricant.

Ce symbole indique la présence d'une tension dangereuse dans

l'appareil constituant un risque de choc électrique.

AVERTISSEMENT :

sonnel qualifié. Les certifications de sécurité sont invalidées lorsque le réglage de tension d'usine est changé.

Les tensions à l'intérieur de cet éq uipeme nt peuv ent être mort elles. Aucune pièce interne répa rable p ar l 'utili sateur. Confier toute réparation à du per-

12.

13. DÉBRANCHER l'appareil pendant les orages ou quand il ne sera pas utilisé pendant
longtemps.

14. CONFIER toute réparation à du personnel qualifié. Des réparations sont nécessaires
si l'appareil est endomm ag é de quelque façon que ce soit, co m me par exemple : cor­don ou prise d'alimentation endommagé, liquide renversé ou objet tombé à l'intérieur
de l'appareil, exposition de l'appar eil à la plui e ou à l'humid ité, app areil qui n e marche
pas normalement ou que l'on a fait tomber.

15. NE P AS exposer cet appareil aux égouttures et aux éclaboussements. NE PAS poser
des objets contenant de l'eau, com m e des vases, sur l'appareil.

16. La prise SECTEUR ou un adaptateur d'alimentation doit toujours rester prêt(e) à être
utilisé(e).

17. Le bruit aérien de l'appareil ne dépasse pas 70 dB (A).

18. L'appareil de construction de CLASSE I doit être raccordé à une prise SECTEUR
dotée d'une protection par mise à la terre.

19. Pour réduire les risques d'incendie ou de choc électrique, ne pas exposer cet
appareil à la pluie ou à l'humidité.

20. Ne pas essayer de modifier ce produit. Une telle opération est susceptible
d'entraîner des blessures ou la défaillance du produit.

UTILISER uniquement avec un chariot, un pied, un trépied,
un support ou une table spécifié par le fabricant ou vendu

avec l'appareil. Si un chariot est utilisé, déplacer l 'ensemble
chariot-appareil avec précaution afin de ne pas le renverser,

ce qui pourrait entraîner des blessures.

Ce symbole indique que la documentation fournie avec l'appareil contient
des instructions d'utilisation et d'entretien importantes.

ENGLISH

DESCRIPTION

The DFR22 Audio Processor with Feedback Reduction is a 2–input, 2–output digital audio processor. It is designed to equalize sound system
response, provide dynamics processing and alignment delay, and automatically detect and control acoustic feedback. A built-in 2 X 2 matrix
mixer allows either or both inputs to be routed to either or both outputs, with additional controls for levels and polarity.

The DFR22 is ideal for installed sound reinforcement applications, such as houses of worship, theaters, and meeting facilities. It is also a
powerful setup tool in live music applications. Using the DFR22’s drag–and–drop graphical user interface, processors can be placed any­where in the signal path.

DFR22 Features

S Shure’s patented digital feedback reduction algorithm:

– Now includes stereo DFR processing capability
– New Auto Clear mode clears dynamic filters after a pre-

set change or power cycle. Dynamic filters can be auto­matically removed after a specified number of hours.

S Configurable signal path with drag and drop Windows inter-

face. Includes graphic and parametric EQ, up to 10 seconds
of delay, compression, limiting, gating, automatic gain control,
ducking, and a fully configurable two–way crossover.

S Phoenix and XLR connectors for each input and output
S Compatible with USB to serial port converters.

S Front and back panel RS232 ports:

– 3–pin Phoenix connector on back panel.
– DB9 connector on front panel; requires only TX, RX, and

GND to be connected.

S Three pre–loaded presets:

– Preset 1: Two mono 16 filter DFRs.
– Preset 2: A stereo 16 filter DFR.
– Preset 3: A mono 16 filter DFR on each input. Each input

is routed to each output.

S Preset selector and indicator for up to 16 presets
S Control input pins for setting up remote preset, volume, and

mute controls

PACKING LIST

S Power Cable
S 5-pin DIN ShureLink Cable
S 4 Rackmount Screws with Nylon Washers

S Five 3-Pin Block Connector Terminals (for audio input/output

and RS–232 communication)

S One 6-pin Block Connector Terminals (for control inputs)
S One DFR22 Software CD–ROM and Online User Guide

REQUIREMENTS
Power Requirements

S 100–240 Vac, 50/60 Hz
S 45 W maximum

Computer Requirements

S 20 MB of hard drive space
S CD ROM drive
S RS–232 serial port and cable, or approved USB-to-Serial port

adapter*

S VGA monitor with 640 x 480/256 color, or higher resolution
S Mouse or other pointing device

Windows Version Processor Speed RAM

98, Second Edition Pentium 166 MHz 48 MB
NT Pentium 233 MHz 64MB
ME Pentium 300 MHz 64 MB
2000 Professional Pentium 300 MHz 96 MB
XP Professional, Home Pentium 300 MHz 128 MB

*Most USB-to-serial port adapters work well with the DFR22. To see the latest list of fully approved adapters, visit http://www.shure.com/mixers/models/dfr22.asp

NOTE: Processor speed and memory requirements vary, depend­ing on the version of Windows and number of background applica­tions you are running. Operating the DFR22 software simulta­neously with programs such as SIA–Smaart
requires a faster processor and more RAM. The chart below lists
the minimum requirements for running the DFR22 software with no
other applications––including virus protection, firewall, instant
messaging, or email––in the background.



or Gold Line TEFt

SOFTWARE INSTALLATION

1. Insert supplied CD into your CD-ROM drive and follow the on-
screen instructions.

2. If installation does NOT start automatically, click on the [Start]
button the the Windows taskbar and select [Run...] from the
pop-up menu.

3. Type [D:/setup}, where “D” is your CD-ROM drive letter.

4. Click OK and follow the on-screen instructions.

USING THE DFR22 SOFTWARE

Instructions for the DFR22 software are available in PDF format on
the CD-ROM included with the system, or on the Shure web site at
www.shure.com.

NOTE: Register this product by filling out and mailing the enclosed
registration card, or register online at the Shure web site
(www.shure.com). Registration allows you to receive information
about software updates as they become available.

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ENGLISH

OVERVIEW
Front Panel

DFR22 FRONT PANEL

1. INPUT/OUTPUT Level Meters:

– CLIP. Illuminates at 3 dB below clipping level.
–0 VU.

– –20 dB. Illuminates when the signal meets or exceeds the

– 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.

+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.

indicated level.

Figure 1

5. BYPASS DFR FILTERS Button and LEDs. Press these but-
tons to suspend feedback reducer operation and remove feed­back filters from the audio path. When a Bypass LED illumi­nates, 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 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 is ap-
plied to the DFR22.

Back Panel

U.S. PATENT NO. 5,999,631
OTHER PATENT PROTECTION
APPLIED FOR

DFR22 REAR PANEL

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
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. 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 between +4 dBu/–10
dBV line–level operation, using the DFR22 software. Refer to
the Audio Connections section.

Figure 2

7. Output Connectors ( XLR). These active, cross–coupled,
balanced outputs can be used with balanced or unbalanced in­puts. They can be switched between +4 dBu/–10 dBV line–lev­el 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 can­not 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 in­put. They can be switched between +4 dBu/–10 dBV line–level
operation using the DFR22 software. See Audio Connections
section for more information.

2