Manuale d’uso / di manutenzione del prodotto DSP1100P del fabbricante Behringer
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1 E User´s Manual Bedienungsanleitung D Version 1.0 October 1998 FEEDBACKDESTROYER ® PRO DSP1100P www.behringer.de.
2 acc. to the Directives 89/336/EWG and 73/23/EWG We, BEHRINGER INTERNA TIONAL GmbH Hanns-Martin-Schleyer-Straße 4 D - 47877 Willich Name and address of the manufacturer or the introducer of the prod.
3 E This symbol, wherever it appears, alerts you to the presence of uninsulated dangerous voltage inside the enclosure - voltage that may be sufficient to con- stitute a risk of shock. This symbol, wherever it appears, alerts you to important operating and mainte- nance instructions in the accompanying literature.
4 DSP1100P FEEDBACKDESTROYERPRO Ultra-high performance 2-channel digital Feedback Destroyer / Parametric EQ powered by a 24-bit high-speed DSP s 20-bit A/D and D/A converters with 64/128 times o.
5 E FOREWORD Dear Customer, Welcome to the team of FEEDBACKDESTROYERPRO users and thank you very much for expressing your confidence in BEHRINGER products by purchasing this unit.
6 T ABLE OF CONTENT 1 . INTRODUCTION . .. . . . ............................................................................................................... 7 1. 1 The design concept .................................................................
7 E 1. INTRODUCTION With the FEEDBACK DESTROYER PRO you have purchased a highly useful device for the control of sound reinforcement systems, which will enable you to focus your attention on what is essential: your music.
8 Electrostatic charges might affect the operation of the FEEDBACKDESTROYERPRO! For further information on correct installation see chapter 5 Installation. As a standard the audio inputs and outputs on the BEHRINGER FEEDBACKDESTROYERPRO are fully balanced.
9 E On start-up; all active filters (AU/SI) are indicated by flashing LEDs. When feedback has been detected and dealt with, the LED stops flashing. When all filters are set the oldest automatic filter starts flashing, indicating that it will be the next filter to handle new feedback.
10 Fig. 1.3: Function keys and jog wheel 5 With the JOG WHEEL , a continuous rotary control, you can freely edit the selected parameters. Turn the wheel clockwise to increase the values, or counterclockwise to reduce them.
11 E + Press and keep the keys FILTERSELECT and STORE before powering up the FEEDBACK DESTROYER PRO. Then switch on the FEEDBACK DESTROYER PRO and keep the two keys pressed for about one second. The program numbers are counted up and reset to their original default settings.
12 2.1 Activating/deactivating the filters In OF mode, the corresponding filter is deactivated and can be activated by selecting one of the modes described below. 2.2 Manual filters / parametric equalizer The FEEDBACK DESTROYER PRO allows you to freely process any music signals.
13 E only after about one second, which is indicated by a dot in the lower right corner of the display. After loading the data, the FEEDBACK DESTROYER PRO enables the preset and the dot disappears. This brief interruption avoids the direct activation of every preset, as you scroll through the preset list with the jog wheel.
14 2.4.4 Storing programs Use the STORE key to store the program. Basically, all parameter changes in Parametric EQ mode can be saved. Filters working in Single-Shot or Auto mode will adjust and store the required parameters automatically. Example: s You recall a program for editing.
15 E via MIDI. Accordingly, the value 1 enables MIDI controller #18 so that you can modify or replace presets with a remote MIDI device or a sequencer. In this case the actual settings will be stored directly to the location that corresponds to the controller value.
16 3.1 Level setting Take care to set levels properly on the FEEDBACKDESTROYERPRO! Low levels deteriorate the dynamics of the music signal, which results in a poor, weak and noisy sound. On the other hand, excess levels overdriving the converters in the FEEDBACKDESTROYERPRO should also be avoided.
17 E situations. Before applying the FEEDBACK DESTROYER PRO, it is therefore advisable to remove the condition causing the feedback problems. For example, try different microphone positions! Use the FEEDBACKDESTROYERPRO in the monitor path and in single channels with critical signals.
18 3.4 Using the FEEDBACK DESTROYER PRO in single channels and sub-groups Master Out P .A. System Sub-Group Insert Channel Insert Fig. 3.3: Inserting the FEEDBACK DESTROYER PRO in single channels and .
19 E 3.7 Special remarks 3.7 .1 Digital overflow When using the FEEDBACK DESTROYER PRO as a parametric equalizer (Parametric EQ mode) and applying extreme attenuation values in the low end range of the frequency spectrum (below 50Hz), you should perhaps set several filters to process the same frequency.
20 The range of sound pressure levels or the dynamic range of human hearing encompasses a factor of 10,000,000. This enormous range of values is difficult to handle and additionally does not represent the subjective perception of sound, since human hearing tends to use a logarithmic curve.
21 E 0 dB -2 dB -4 dB -6 dB -8 dB -10 dB -12 dB 1 kHz 5 kHz 200 Hz Bandwidth = 600 Hz Filter attenuated by 8 dB at 1kHz Center frequency = 1 kHz -3 dB Fig. 4.2: T ypical equalizer filter curve The filter bandwidth can also be expressed in octaves (as on the FEEDBACK DESTROYER PRO).
22 Microphone Mixing Console Power Amp Speaker Box Fig. 4.3: T ypical feedback loop Basically, any microphone signal passing through an amplifier is liable to generate feedback.
23 E Of course, you can use the FINE button to fine tune to frequencies between the standard ISO frequencies (in 1/60-octave steps) within a range of 1/3 octave. Hz 20 25 31, 5 40 50 63 80 100 125 160 2 00 250 315 400 500 630 800 kHz 1 1, 25 1, 6 2 2, 5 3, 15 4 5 6, 3 8 10 12, 5 16 20 T ab.
24 s Quick filter settings can be realized by using standard ISO values for the allocation of frequency bands. Subsequently, you can fine tune the frequency of your choice. 4. 5 Digital audio processing In order to convert an analog signal - e.g. music - into a series of digital words, a so-called Analogue to Digital Converter or ADC is used.
25 E Quantization Steps U (V oltage) -8 -7 -6 -5 -4 -3 -2 Digital Words 1111 111 0 1 101 1 100 101 1 1010 1001 1000 0000 t (Time) 0001 0010 001 1 0100 0101 01 10 01 11 Conversation Rate 8 7 6 5 4 3 1 2 3 4 5 6 7 8 -1 -2 -3 -4 -5 -6 -7 -8 Quantization Errors (Noise) Continuous Analog Signal Fig.
26 does not comply, then it is necessary to switch the operating voltage to the correct supply requirements BEFORE turning on the unit, otherwise the unit could be severely damaged. You will find this combined fuse holder/voltage selector at the back, adjacent to the IEC receptacle.
27 E Unbalanced use of mono 1/4" jack plugs Ring Balanced use of stereo 1/4" jack plugs Balanced use with XLR connectors 1 2 3 2 1 3 Input Output Tip = Signal Tip = hot (+ve) Sleeve = Ground.
28 5.5 Operating level Switch To adapt the FEEDBACK DESTROYER PRO to the used operating level, the unit can be switched between homerecording level (-10dBV) and professional level (+4dBu). Use the LED bars on the frontpanel to deter- mine the optimal setting.
29 E 6. 2 Preset table Preset Filter 1 Filte r 2 Filter 3 Filter 4 Filter 5 Filte r 6 Filter 7 Filter 8 Filter 9 Filte r 10 Filte r 11 Filte r 12 1 L SI SI SI SI SI SI SI SI SI AU AU AU R SI SI SI SI .
30 6.3 MIDI implementation Parameter Nam e Display Range Midi Control Number Control Value Rang e LEDs Couple Left Right IN on IN off IN flashing Filter Select 1..12 10 0..11 Filter Mode OF, PA, A U, SI 11 0..3 Engine 12 0,1,2 0 1 2 Frequency 20 (Hz).
31 E 6. 4 Specifications Analog Inputs Connectors XLR and 1/4" jack Type R F filtered, servo balanced input Impedance 6 0 k O h m s balanced, 30 kOhms unbalanced Nominal Operating Level - 10dBV to +4dBu Max.
32 this modification/adaptation shall not be considered a defect in materials or workmanship. The warranty does not cover any such modification/adaptation, irrespective of whether it was carried out properly or not.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Behringer DSP1100P è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Behringer DSP1100P - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Behringer DSP1100P imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Behringer DSP1100P ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Behringer DSP1100P, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Behringer DSP1100P.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Behringer DSP1100P. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Behringer DSP1100P insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
