Behringer SHARK DSP110 User manual

SHARK® DSP110
Userss Manual
Version 1.2 April 2001
www.behringer.com
ENGLISH

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SHARK DSP110
This symbol, wherever it appears,
alerts you to the presence of
uninsulated dangerous voltage inside
the enclosure - voltage that may be
sufficient to constitute a risk of shock.
This symbol, wherever it appears, alerts
you to important operating and
maintenance instructions in the
accompanying literature. Read the
manual.
SAFETY INSTRUCTIONS
CAUT ON: To reduce the risk of electrical shock, do not remove
the cover (or back). No user serviceable parts inside;
refer servicing to qualified personnel.
WARN NG: To reduce the risk of fire or electrical shock, do not
expose this appliance to rain or moisture.
DETAILED SAFETY INSTRUCTIONS:
All the safety and operation instructions should be read before the appliance is operated.
Retain Instructions:
The safety and operating instructions should be retained for future reference.
Heed Warnings:
All warnings on the appliance and in the operating instructions should be adhered to.
Follo instructions:
All operation and user instructions should be followed.
Water and Moisture:
The appliance should not be used near water (e.g. near a bathtub, washbowl, kitchen sink, laundry tub, in a
wet basement, or near a swimming pool etc.).
Ventilation:
The appliance should be situated so that its location or position does not interfere with its proper ventilaton.
For example, the appliance should not be situated on a bed, sofa rug, or similar surface that may block the
ventilation openings: or placed in a built-in installation, such as a bookcase or cabinet that may impede the
flow of air through the ventilation openings.
Heat:
The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other
appliances (including amplifiers) that produce heat.
Po er Source:
The appliance should be connected to a power supply only of the type described in the operating instructions
or as marked on the appliance.
Grounding or Polarization:
Precautions should be taken so that the grounding or polarization means of an appliance is not defeated.
Po er-Cord Protection:
Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed
upon or against them, paying particular attention to cords and plugs, convenience receptacles and the point
where they exit from the appliance.
Cleaning:
The appliance should be cleaned only as recommended by the manufacturer.
Non-use Periods:
The power cord of the appliance should be unplugged from the outlet when left unused for a long period of
time.
Object and Liquid Entry:
Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings.
Damage Requiring Service:
The appliance should be serviced by qualified service personnel when:
- The power supply cord or the plug has been damaged; or
- Objects have fallen, or liquid has been spilled into the appliance; or
- The appliance has been exposed to rain; or
- The appliance does not appear to operate normally or exhibits a marked change in performance; or
- The appliance has been dropped, or the enclosure damaged.
Servicing:
The user should not attempt to service the appliance beyond that which is described in the Operating
nstructions. All other servicing should be referred to qualified service personnel.

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SHARK DSP110
1. INTRODUCTION
Thank you very much for expressing your confidence in B HRING R products by
purchasing the SHARK DSP110.
+This manual first describes the terminology used, so that you can fully
understand the DSP110 and its functions. Please read the manual carefully
and keep it for future reference.
1.1 The concept
With the SHARK DSP110 you purchased a device that combines an automatic Feedback
Destroyer using the ingenious search algorithms of our F DBACK
D STROY RPRO DSP1124P, a variable Delay Line (adjustable in msec, feet and
meter), a ULN (Ultra-Low Noise) microphone pre-amp with Phantom Power, an
automatic Noise Gate, a variable Low Cut filter and a Compressorall in one ultra-
rugged and compact case. Still, the SHARK can be operated intuitively and expanded
to a multi-channel system using another four SHARKs and an optionally available 19"
rack mount kit. The SHARKs 24-bit A/D and D/A converters guarantee a precise
reproduction of your program material.
High volume levels and the use of ever more sophisticated monitoring systems with
a multitude of speaker cabinets have led to a greater potential risk of feedback loops
in sound reinforcement systems. So far, audio engineers have been using conventional
1/3-octave equalizers to suppress unwanted feedback. However, the individual filters
of such an Q, with their relatively wide bandwidth, have quite an impact on the sound
image. With the B HRING R SHARK (minimum bandwidth: 1/60 of an octave) you
are now free to either choose the trial and error method to suppress feedback with
graphic equalizers, or to assign this task to the DSP110, so that you can give your
music your undivided attention. Using extremely narrow-bandwidth filters, the
SHARKDSP110 eliminates only unwanted feedback, without affecting your music.
1. INTRODUCTION

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SHARK DSP110
Fig. 1.1: Typical feedback loop
1.2 Before you begin
Your SHARK was carefully packed in the factory and the packaging is designed to
protect the unit from rough handling. Nevertheless, we recommend that you carefully
examine the carton and its contents for any signs of physical damage, which may have
occurred during transit.
+If the unit is damaged, please do not return it to B HRING R, but notify
your dealer and the shipping company immediately, otherwise claims for
damage or replacement may not be granted. Shipping claims must be made
by the consignee.
The optionally available rack mount kit allows you to mount your B HRING R SHARK
in a standard 19" rack, together with another four SHARKs. The rack mount kit requires
2U of rack space.
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SHARK DSP110
Be sure that there is enough air space around the unit for cooling and please do not
place the SHARK on high-temperature devices such as power amps, etc. to avoid
overheating.
Please use the enclosed power supply to connect the unit to the mains. The supply
complies with all applicable safety standards.
+Please note that all units must be grounded properly. For your own safety,
you should never remove any ground connectors from electrical devices
or power cords or render them inoperative.
Further information can be found in chapter 3 INSTALLATION.
As a standard the audio inputs and outputs of the B HRING R SHARK DSP110 are
fully balanced. If possible, connect the unit to other devices in a balanced configuration
to allow for maximum interference immunity. The automatic servo function detects
unbalanced connections and compensates the level difference automatically (6dB
correction).
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SHARK DSP110
1.3 Control elements
Fig. 1.2: Front panel control elements of the DSP110
1The C IP EVE METER shows you whether or not the digital circuitry is
driven correctly. Any corrections can be made with the CLIP L V L control
. Be sure that the CLIP L D wont light up.
2The C IP EVE control lets you adapt the internal gain optimally to the digital
circuitry. If gain is too high (CLIP L D lights up), raise the CLIP L V L value by
turning the control to the right (and vice versa). Thus, you can shift the operating
level upwards/downwards.
+The CLIP L V L control does not affect the input/output levels, but adapts
the audio signal as optimally as possible to the threshold of the digital
circuitry.
3These five EDs symbolize the units of the parameters that can be adjusted on
the display .
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SHARK DSP110
4The 4-digit DISP AY reads the absolute values of the adjusted parameters.
5The FB-D FI TER STATUS EDs display the status of each of the 12 individual
filters. The SHARK uses four different filter modes:
sDisabled filters (which can be re-enabled with the ACTIV button). When a
filter is off, its L D is not lit.
sFree filters which automatically search for feedback frequencies and whose
activity is shown by a flashing L D.
sSet filters which can be reconfigured as free (searching) filters, when all filters
are currently in use.
sPermanently set filters which must be R S T to be reconfigured as free filters.
Once a filter has been set, its L D lights up.
6The DE AY button allows you to adjust the Delay Line time. Press the button
several times to either choose msec, feet or meter. The last unit selected will be
stored and recalled next time you use the D LAY function. The control L D
lights up while you are making your entries. The setting range is from 0 to
2,500.0 msec, 0 to 2,818.2 feet, and 0 to 859.00 meters. When you are using
high values, the 4-digit display reads the last figure only when you start editing
with the UP/DOWN buttons. xample: for a value of 1,500.0 msec, the display
reads 1500 when you press the D LAY button, and 500.0 when you start
editing. In this way, you can use extremely small steps when editing parameters.
+To speed up the selection, briefly press the key located next to the UP or
DOWN key. The selection speed will be increased with each additional key
press. This function can be used for all parameter edits.
7The DOWN button lowers the parameter values shown in the display .
8The UP button raises these parameter values.
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SHARK DSP110
9The OW CUT button lets you enter the high pass filters cut-off frequency
(20 to 150 Hz). When set to OFF the filter is inoperative. The control and Hz
L Ds light up while you are entering a value. Use the UP/DOWN buttons to
edit. Pressing the LOW CUT button for a longer time (please wait, until all
five parameter L Ds light up) enables the keypad lock feature which prevents
inadvertent editing of parameters and settings. When the keypad lock is enabled,
the LOW CUT keys control L D starts flashing.
10 Use the GATE button to adjust the threshold of the internal Noise Gate (-96 dB
through -44 dB). When set to OFF, the Noise Gate is inoperative. The control
L D of the GAT button lights up while you are entering a value. Pressing the
GAT button for a longer time (please wait, until all five parameter L Ds light
up) enables the GAT L ARN function, which automatically sets the Noise
Gate threshold by analyzing the program material and adjusting the value
accordingly (value detected plus 2 dB). In GAT L ARN mode, the GAT keys
control L D starts flashing. As long as the L D flashes, the detected value is
read on the display, when the L D stops flashing, the value is raised by +2 dB.
11 The COMPRESSOR button gives you access to two parameters that let you
adapt the DSP110s Compressor function to the program material. Press the
button once to adjust the D NSITY parameter, which controls the compression
density from 0 (no processing) to 100 (maximum compression). Press the
COMPR SSOR button a second time to adjust the SP D parameter which
controls the Compressors attack and release times from 10 to 1000 msec. The
msec L D lights up as soon as you select the SP D parameter.
12 The FILT R key allows you to set the feedback detection sensitivity within a
range from 1 (no sensitivity) through 100 (full sensitivity). The default value is
50. The control L D lights up during data entry. Briefly press the FILT R key a
second time to edit the maximum attenuation of the FB-D filter (from -3 dB
through -48 dB in steps of 3). Pressing the FILT R key longer (please wait, until
all five parameter L Ds light up) activates the FILT R L ARN function, which
automatically searches for feedback frequencies and assigns free filters to the
frequencies found. Now you can enter the number of filters (standard: 9) to be
used for permanent feedback suppression. Although the remaining filters are
also used to eliminate feedback frequencies, they are released once new
feedback occurs. Pressing the FILT R key once again activates the FILT R
L ARN function.
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SHARK DSP110
+When both FILT R L D and display stop flashing, the FILT R L ARN function
has been completed. Press the FILT R key to cancel the function. After a
short delay, the unit returns to the FILT R menu.
The FILT R L ARN function generates short feedback-causing signals that
are sent back to the DSP110s input, where feedbacks are detected and
suppressed. The FILT R L ARN function is an useful tool for live concerts that
prevents filters from being released prematurely. Fixed filters can only be
reconfigured as free, searching filters by means of a R S T. In normal mode,
which is activated after power-up, set filters are automatically released one after
the other, when free filters are needed to search and destroy feedback
frequencies.
+To ensure that the FILT R L ARN function works properly, the short
feedback-causing signals are output with a level of -18 dB below digital
maximum. However, the feedback caused during the FILT R L ARN
procedure will be limited by the compressor to -30 dB below digital
maximum. Please note that considerable volume levels can still occur,
which is why you should use the FILT R L ARN function only before the
concert/event begins.
13 nable the ACTIVE button to set inoperative filters to automatic search mode.
When this button is up (control L D is off), those filters are inoperative which
have not yet found a feedback frequency. Pressing the ACTIV button for a
longer time (please wait, until all five parameter L Ds light up) enables the
R S T function. All filters will be reset, i.e. set to automatic search mode.
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SHARK DSP110
Fig 1.3: Rear panel control elements and connectors of the DSP110
14 This is the SHARKs balanced X R output.
15 This is the SHARKs balanced X R input.
16 The MIC GAIN control adjust the input signal gain, when the INPUT L V L
switch has been pressed (position: MIC). To adjust microphone levels you
can use the CLIP L V L indicator, by setting the CLIP L V L control to mid-
travel position. Please make sure that the CLIP L D will not light up.
17 Use the POWER SUPP Y CONNECTOR to hook up the SHARKs external
power supply.
18 This is the SHARKs balanced JACK output, which carries the same signal as
the XLR output.
19 The OUTPUT EVE switch controls the reference level provided by the outputs
of the DSP110. Possible values are: +4 dBu or microphone level.
1. INTRODUCTION