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Behringer DSP8024 manual

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Table of contents for the manual

  • Page 1

    Version 1.2 June 2001 User’s Manual www.behringer.com ULTRA-CURVE ® PRO DSP8024 ENGLISH[...]

  • Page 2

    2 UL TRA-CURVE PRO DSP8024 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[...]

  • Page 3

    3 UL TRA-CURVE PRO DSP8024 FOREWORD Dear Customer, welcome to the team of ULTRA-CURVE PRO users and thank you very much for expressing your confidence in BEHRINGER products by purchasing this unit. It is one of my most pleasant tasks to write this letter to you, because it is the culmination of many months of hard work delivered by our engineering [...]

  • Page 4

    4 UL TRA-CURVE PRO DSP8024 DSP8024 ULTRA-CURVEPRO Ultra-high performance digital stereo mainframe powered by two 24-bit high-speed digital signal processors s High-end AKM and CRYSTAL 24-bit AD/DA converters for ultra-high dynamic range and resolution s Open-ended & “future-proof” architecture allows for future software upgrades s Ultra-[...]

  • Page 5

    5 UL TRA-CURVE PRO DSP8024 T ABLE OF CONTENTS 1 . INTRODUCTION ..................................................................................................................... 6 1. 1 The design concept .......................................................................................................... ............... 6 1. 2 Before you be[...]

  • Page 6

    6 UL TRA-CURVE PRO DSP8024 1. INTRODUCTION The BEHRINGER ULTRA-CURVE PRO is a fully digital sound processing device based on DSPs and 24-bit A/D and D/A converters. The high-speed DSPs are capable of performing any process in fractions of a second, the only element governing their performance being the software. The enormous flexibility available m[...]

  • Page 7

    7 UL TRA-CURVE PRO DSP8024 The automatic servo function recognizes the presence of unbalanced connectors and adjusts the nominal level internally to avoid level differences between the input and output signals (6 dB correction). The optional digital input and output (AES/EBU interface) connections are balanced with a negative ground. High-quality c[...]

  • Page 8

    8 UL TRA-CURVE PRO DSP8024 + In each case pressing on the opposite key while holding the key being used will accelerate the operation being carried out. Fig. 1.2: The rear panel layout of the UL TRA-CUR VE PRO 9 This is the MAINS CONNECTOR/FUSE HOLDER/VOLTAGE SELECTOR. Before you connect the unit, please make sure that the displayed voltage corresp[...]

  • Page 9

    9 UL TRA-CURVE PRO DSP8024 2.1 EQ mode Fig. 2.1: Main EQ window of the UL TRA-CUR VE PRO The display shows a 31-band graphic equalizer, along with the main fader for overall level control — slightly separated on the right hand side. On the left are the pictograms for the softkeys, which are used to open the sub-menus. 2.1.1 Operating the graphic [...]

  • Page 10

    10 UL TRA-CURVE PRO DSP8024 When the limiter threshold is exceeded, the indication LIM will appear in the level meter display to indicate that the limiter is attenuating the output. With softkey A you leave the level meter, and return to the main EQ window. With softkey B you erase the maximum levels from the memory. With softkey C / you switch the[...]

  • Page 11

    11 UL TRA-CURVE PRO DSP8024 search means that the audio signal is continuously examined for signs of feedback. If feedback is detected, the ULTRA-CURVE PRO will assign an appropriate filter to the relevant frequency and apply narrow band attenuation, also known as a “ notch filter ” . The parameters which have been used will be continuously dis[...]

  • Page 12

    12 UL TRA-CURVE PRO DSP8024 question “ CLEAR PROGRAM IN MEMORY? ” which can be confirmed with . By using you can stop at this point and leave the settings as they are. We recommend that you make use of this feature whenever you have something completely new to do and have to start from scratch. This way, you can carry on without the danger that[...]

  • Page 13

    13 UL TRA-CURVE PRO DSP8024 Channel switching In the EDIT menu, you can switch back and forth between the two channels, using softkey C. The pictogram for softkey C will show you which channel is active, and whether or not the channels are connected to each other via the stereolink function: left channel, stereolink on right channel, stereolink on [...]

  • Page 14

    14 UL TRA-CURVE PRO DSP8024 possibly causing the noises mentioned above. SHEL VING SLOPE This is a tool which you can use to easily add high shelving, low shelving and bell-shaped response curves to the graphic equalizer (see section 2.1.5 on previous page). LIMIT THRESHOLD The ULTRA-CURVE PRO has an integrated digital limiter to protect against ov[...]

  • Page 15

    15 UL TRA-CURVE PRO DSP8024 f: the frequency in Hertz of the selected band, act: the level present as the display was frozen, max: the highest level reached on this frequency up to the point in time when the display was frozen (the maximum values stored in memory can be replaced). + The levels displayed in the RTA refer to the digital maximum. PROG[...]

  • Page 16

    16 UL TRA-CURVE PRO DSP8024 increasing the decay results in a slower display. + Short decays are necessary to display fast processes, whereas using long decays with static signals will result in a “quieter” display, which is usually desirable for this type of signal. 2.2.5 RTA setup The RTA SETUP menu is opened by pressing the SETUP key. The RT[...]

  • Page 17

    17 UL TRA-CURVE PRO DSP8024 = sine wave, OFF = signal generator off or INPUT = input signal. White noise is composed of multitudes of sine waves packed close together, of equal amplitude, whose phases are random compared to each other (statistically different from each other). Their “ density ” or, spectral intensity is constant at any given fr[...]

  • Page 18

    18 UL TRA-CURVE PRO DSP8024 more than 12 dB to reach the desired frequency response. If this is the case, you may assume that the loudspeaker system being used is not capable of reproducing this frequency (typically if it is a very low or high frequency). The ULTRA-CURVE PRO will therefore completely avoid the boosting of this frequency to any exte[...]

  • Page 19

    19 UL TRA-CURVE PRO DSP8024 rates, the ULTRA-CURVE PRO will be muted for approx. 1 sec., as all the filter parameters have to be recalculated. In purely analog mode the 48 kHz rate should be used. Apart from the fact that the high sample rate gives the widest frequency response and correspondingly the best possible sound, at this rate the fastest s[...]

  • Page 20

    20 UL TRA-CURVE PRO DSP8024 MIDI Here the MIDI function is switched on or off. Toggle between ON and OFF with the +/- buttons. CHANNEL This field indicates the current MIDI channel. OMNI MODE signifies that MIDI commands from all channels are received. SND MEMORY DUMP You can send a MIDI dump using the +/- buttons. The complete memory will be trans[...]

  • Page 21

    21 UL TRA-CURVE PRO DSP8024 To obtain the best results the following points should be paid close attention to: Experience has shown that, before beginning to use the equalizer, it is sensible to listen to a variety of music and speech material with which you are thoroughly familiar, playing these references “ straight ” through the system witho[...]

  • Page 22

    22 UL TRA-CURVE PRO DSP8024 Positions 1 and 2 are about three feet directly in front of the loudspeaker system, positioned halfway between the middle and high frequency components. These measurements can be used as a control of the basic system functions. Position 3 is about seven feet in front of the stage centre. Measurements taken here should sh[...]

  • Page 23

    23 UL TRA-CURVE PRO DSP8024 musicians — their hearing will recover sensitivity during a pause — the end result is that you recover valuable headroom. If you are repeatedly using the same monitor loudspeakers, you can save the EQ settings which you have set for these speakers (store them under names such as wedge 15" or drumfill). Extremely[...]

  • Page 24

    24 UL TRA-CURVE PRO DSP8024 the stage the same clear, direct sound as those with better positions. In order to compensate for the time differences existing between the main L and R loudspeakers and those further away, the signal to the latter will be sent through an electronic delay device. This usually is a separate line-delay unit designated sole[...]

  • Page 25

    25 UL TRA-CURVE PRO DSP8024 4 . “TRUE RESPONSE” CHARACTERISTIC The BEHRINGER ULTRA-CURVE PRO differs greatly from conventional graphic equalizers, in its filter concept and resulting method of operation. Conventional graphic equalizers are, by the physical nature of their design, subject to strong interaction between adjacent filters, resulting[...]

  • Page 26

    26 UL TRA-CURVE PRO DSP8024 Fig. 4.2: UL TRA-CUR VE PRO with “true response” Fig. 4.3: Combination of 4.1 and 4.2—with the fader positions added 5 . ULTRA-CURVE PRO STRUCTURE 5. 1 Hardware The analog input signals first pass through the electronic balancing amplifier and are then fed to the A/D converters. Here they are converted into a time [...]

  • Page 27

    27 UL TRA-CURVE PRO DSP8024 to one of the A/D converter inputs. Switching onto a particular input can be carried out in the RTA or RTA SETUP menu. The digital input signal goes straight through the transformer balanced input directly to the DSPs (applicable only when the AES/EBU option is installed). Switching between the analog and digital input s[...]

  • Page 28

    28 UL TRA-CURVE PRO DSP8024 At first, the level will be determined before processing. This information is sent to and displayed by the level meter. Apart from this the input signal will be delayed if a delay time is set. Once again, a level will be determined, this time from the delayed signal. This will be used to control the noise gate. At the sa[...]

  • Page 29

    29 UL TRA-CURVE PRO DSP8024 6. INSTALLATION 6.1 Mains connection Before you switch on the unit, check that it is configured to match your AC mains voltage requirements. If it 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 damag[...]

  • Page 30

    30 UL TRA-CURVE PRO DSP8024 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 / Shield Sleeve = Ground / Shield Tip Ti p Sleeve Sleeve Strain relief clamp Strain relief clamp Ring = cold (-ve) For connect[...]

  • Page 31

    31 UL TRA-CURVE PRO DSP8024 Fig. 6.2: Adaptor S/PDIF out > UL TRA-CURVE PRO AES/EBU in Connecting from the ULTRA-CURVE PRO AES/EBU output to an S/PDIF input will probably not work, because the copy prohibit function present at the S/PDIF device will be triggered by a channel status bit, or possibly another AES/EBU defined bit, preventing data tr[...]

  • Page 32

    32 UL TRA-CURVE PRO DSP8024 ULTRA-CURVE PRO is switched off. If you decide to replace the battery yourself please note that you will invalidate your warranty. + Disconnect the ULTRA-CURVE PRO from mains before opening the enclosure. + Warning: Danger of explosion when battery is placed incorrectly! Replace only with the same type (see technical spe[...]

  • Page 33

    33 UL TRA-CURVE PRO DSP8024 Status By t es Program Changes Pcxx c = Channel xx = Program (0..99) Controll er Control l er Offs et adjustable from 0 t o 64 * Ccxx c = Channel xx = Number Da ta Byte s Parameter Range EQ Left 0 - 127 Master Level Left 0 - 127 EQ Right 0 - 127 Master Level Right 0 - 127 20 Hz, 25 Hz, ..., 16 kHz, 20 k Hz Definiti on Co[...]

  • Page 34

    34 UL TRA-CURVE PRO DSP8024 8. TECHNICAL SPECIFICATIONS Analog audio inputs Connectors XLR and 1/4" TRS connectors T y p e servo-balanced input with RF rejection Impedance 50 kOhm balanced, 25 kOhm unbalanced Max. input Level +21 dBu balanced and unbalanced CMRR typical 40 dB, >55 dB @ 1 kHz Analog audio outputs Connectors XLR and 1/4"[...]

  • Page 35

    35 UL TRA-CURVE PRO DSP8024 Digital delay T y p e digital stereo delay Maximum delay time 2.5 s, independently adjustable for each channel Minimum resolution 0.1 msec Delay unit seconds, meters or feet Level meter T yp e Digital level meter with simultaneous graphical display of peak and RMS values Attack/Decay (RMS) 60 dB/s Attack (Peak) 1 sample [...]

  • Page 36

    36 UL TRA-CURVE PRO DSP8024 The information contained in this manual is subject to change without notice. No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording of any kind, for any purpose, without the express written permission of BEHRINGER Spezielle Stud[...]