SHARK® DSP110
Users’s Manual
Version 1.2 April 2001
www.behringer.com
ENGLISH
SHARK DSP110
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SHARK DSP110
1. INTRODUCTION
Thank you very much for expressing your confidence in BEHRINGER 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 FEEDBACK DESTROYER 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 ultrarugged 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 EQ, with their relatively wide bandwidth, have quite an impact on the sound image. With the BEHRINGER 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.
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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 BEHRINGER, 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 BEHRINGER SHARK in a standard 19" rack, together with another four SHARKs. The rack mount kit requires 2U of rack space.
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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 BEHRINGER 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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1.3 Control elements
Fig. 1.2: Front panel control elements of the DSP110
1The CLIP LEVEL METER shows you whether or not the digital circuitry is
driven correctly. Any corrections can be made with the CLIP LEVEL control
. Be sure that the CLIP LED won’t light up.
2The CLIP LEVEL control lets you adapt the internal gain optimally to the digital circuitry. If gain is too high (CLIP LED lights up), raise the CLIP LEVEL value by turning the control to the right (and vice versa). Thus, you can shift the operating level upwards/downwards.
+The CLIP LEVEL 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 LEDs symbolize the units of the parameters that can be adjusted on the display 
.
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4The 4-digit DISPLAY reads the absolute values of the adjusted parameters.
5The FB-D FILTER STATUS LEDs 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 ACTIVE button). When a filter is off, its LED is not lit.
sFree filters which automatically search for feedback frequencies and whose activity is shown by a flashing LED.
sSet filters which can be reconfigured as free (searching) filters, when all filters are currently in use.
sPermanently set filters which must be RESET to be reconfigured as free filters.
Once a filter has been set, its LED lights up.
6The DELAY 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 DELAY function. The control LED 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. Example: for a value of 1,500.0 msec, the display reads “1500” when you press the DELAY 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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9The LOW 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” LEDs 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 LEDs 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 LED starts flashing.
10Use 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 LED of the GATE button lights up while you are entering a value. Pressing the GATE button for a longer time (please wait, until all five parameter LEDs light up) enables the GATE LEARN function, which automatically sets the Noise Gate threshold by analyzing the program material and adjusting the value accordingly (value detected plus 2 dB). In GATE LEARN mode, the GATE key’s control LED starts flashing. As long as the LED flashes, the detected value is read on the display, when the LED stops flashing, the value is raised by +2 dB.
11The 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 DENSITY parameter, which controls the compression density from 0 (no processing) to 100 (maximum compression). Press the COMPRESSOR button a second time to adjust the SPEED parameter which controls the Compressor’s attack and release times from 10 to 1000 msec. The “msec” LED lights up as soon as you select the SPEED parameter.
12The FILTER 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 LED lights up during data entry. Briefly press the FILTER 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 FILTER key longer (please wait, until all five parameter LEDs light up) activates the FILTER LEARN 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 FILTER key once again activates the FILTER LEARN function.
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