Hardware Manual DSP-30 Computer Configurable Digital Signal Processor *TD-000097-00* TD-000097-00 Rev.C 1 WARNING! WHILE QSC HAS ENDEAVORED TO DEVELOP AND PRODUCE THE MOST DEPENDABLE AND ROBUST DIGITAL SIGNAL PROCESSOR (DSP) AUDIO PRODUCT FOR YOUR USE, DUE TO THE UNLIMITED AND POTENTIALLY DESTRUCTIVE (TO THE SOUND SYSTEM) CONFIGURATIONS THAT MAY BE APPLIED TO THE DSP BY THE USER, QSC CANNOT BE HELD RESPONSIBLE FOR DAMAGES RESULTING FROM ANY DEVIATION OR FAILURE BY THE USER TO STRICTLY FOLLOW THE RECOMMENDATIONS SET FORTH IN THE OWNER'S MANUAL FOR THE INTEGRATION OF THE DSP AND SIGNAL MANAGER SOFTWARE WITH YOUR SOUND SYSTEM. ALL RISKS ATTENDANT TO INTEGRATION OF USER-CONFIGURABLE DSP PRODUCTS WITH YOUR SOUND SYSTEM ARE ASSUMED BY YOU. WHILE QSC STRIVES TO SUPPLY THE HIGHEST QUALITY TECHNICAL SOLUTIONS FOR DIGITAL SIGNAL PROCESSING, IN NO EVENT WILL QSC OR ITS SUPPLIERS BE HELD LIABLE FOR ANY DAMAGES, CONSEQUENTIAL, INCIDENTAL, OR OTHERWISE, INCLUDING ANY CLAIMS FOR LOST PROFITS AND/OR SAVINGS RESULTING FROM ANY ATTEMPTED INTEGRATION OF THE DSP AND SIGNAL MANAGER SOFTWARE WHICH DOES NOT STRICTLY ADHERE TO THE MANUAL'S RECOMMENDATIONS. IMPORTANT SAFETY INFORMATION: PLEASE REVIEW! EXPLANATION OF GRAPHICAL SYMBOLS Federal Communications Commission (FCC) Information NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a commercial installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case the user will be required to correct the interference at his or her own expense. The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to humans. The exclamation point within an equilateral triangle is intended to alert the users to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: To reduce the risk of electric shock, do not remove the cover. No user-serviceable parts inside. Refer servicing to qualified service personnel. WARNING: To prevent fire or electric shock, do not expose this equipment to rain or moisture. SAFEGUARDS Electrical energy can perform many useful functions. This unit has been engineered and manufactured to assure your personal safety. Improper use can result in potential electrical shock or fire hazards. In order not to defeat the safeguards, observe the following instructions for its installation, use and servicing. 2 Table of Contents INTRODUCTION Product Overview..................................................................4 Front and Rear Panel Illustrations and Dimensions.................4 INSTALLATION Unpacking..................................................................................................6 What is Included...................................................................................6 Mounting............................................................................................6 Connections: Balanced Audio Connector Pinouts........................7 Unbalanced Audio Connector Pinouts................................8 Audio Inputs and Outputs..........................................9 RS-232 Port....................................................................10 System Requirements...........................................................................11 Software Installation...........................................................................11 USE Control, Indicator, and Connector Descriptions..................12 General Use Guidelines.................................................................14 Presets....................................................................................15 How to save presets into the DSP-30...........................................15 How to recall Presets ...............................................................16 Lockout feature use.......................................................................17 Contact closure Feature .............................................................18 RS-232 pinout.........................................................................19 Application Example....................................................................20 SPECIFICATIONS.......................................................................................................................................................22 ARCHITECT'S & ENGINEER'S SPECIFICATION..............................................................................................24 QSC INFORMATION Maintenance, Warranty & QSC Contact Information................................25 © Copyright 2002, QSC Audio Products, Inc. QSC® is a registered trademark of QSC Audio Products, Inc., Costa Mesa, CA "QSC" and the QSC logo are registered with the U.S. Patent and Trademark Office 3 Introduction: Overview and Illustrations Overview The DSP-30 and Signal Manager software combine easy-touse, customizable, two-channel DSP with simple operatingmode selection that requires only two buttons to operate. It can be used with all amplifiers and is housed in a 1-RU , 19-inch rack-mount steel chassis. Sampling frequency is 48 kHz. with 24-bit resolution. Dynamic range is greater than 93dB. It is absolutely rugged and dependable in the spirit of all QSC professional audio products and fully suited for the rigors of touring use. Processing capabilities of the DSP-30 include compressors, limiters, delays, parametric EQ, high/low pass filters, high/low shelf filters, test signal generators (sine-wave, pink- and white-noise), splitters/mixers, polarity reversal, gain/attenuation, and metering. A feature called "Predictive Delay" enables the DSP-30's compressors and limiters to produce less signal distortion than their analog counterparts, especially for fast attack times. Predictive delay adds time delay to the signal path and must be accounted for to maintain proper time allignment. Using the Signal Manager software, predictive delay may be turned on or off; when on, it will provide time delay information to the operator. The DSP-30 provides powerful signal processing while keeping operation as simple. Preset operating modes are userselectable by scrolling through the list of numbered Presets on the front panel display and selecting. The DSP-30 will mute, reconfigure, and unmute in a fraction of a second, providing smooth transitions free of thumps, clicks and other undesirable audio artifacts. The contact closure input feature allows for instantaneous gain changing and other programmable uses. Use the QSC Signal Manager software to create the preset configurations. Please refer to page 11 for computer system requirements and software installation guidelines. For instructions for creating a simple signal processing chain, refer to the software help file. QSC's Signal Manager software provides an easy-to-use graphical user interface where DSP "objects" are placed onto a workspace and interconnects are drawn. This interface allows almost infinite configuration possibilities. Signal Manager transfers the preset data to the DSP-30 through a serial data cable. The cable connects between the computer's COM port and the DSP-30's RS-232 port. Once the presets have been loaded, connection to the computer is no longer required. This feature allows essentially tamper-proof DSP setup. Stored presets can be recalled using the front panel Select button. Modification of stored presets, or the creation of new presets can be implemented by connecting a computer and loading the new presets into the DSP. The DSP-30 will provide many years of reliable, professional quality signal processing. From all of us at QSC Audio Products, "Thank you." Front Panel Power `on' indicator LED Power switch Browse button Accept button Signal indicator LED's RS-232 connector Multi-segment LED numeric display Rear Panel Input Connectors Output Connectors AC Power Connector 4 Introduction: Illustrations and Dimensions Dimensions 5 Installation: Unpacking and Mounting Unpacking There are no special unpacking precautions. However, it is recommended you keep the original packing material for reuse in the rare event that service be required. If service is required and the original packing material is not available, ensure that the unit is adequately protected for shipment (strong box of appropriate size , sufficient packing material to prevent load-shifting or impact damage). What is included in the carton: Item 123456Description DSP-30 Digital Signal Processor Self-adhesive rubber feet Hardware Manual (this document) Signal Manager Software CD IEC Power Cord 3 x #18 AWG RS-232 cable (6 ft.) Quantity 1 4 1 1 1 1 Mounting The DSP-30 can be used in or out of an equipment rack. Adhesive rubber feet are included for non-rack mount installations. Use them to prevent the unit from scratching or marring support surfaces. Rack Mounting Rack mount the DSP-30 by supporting it from underneath while aligning the mounting holes with the threaded screw holes in the rails; install all four mounting screws and washers and tighten securely. Ensure use of all four mounting screws in order to minimize the chance of bending or distorting the rack mount ears. Rack mounting is optional. Support the Rear for Portable/Mobile Installations If the DSP-30 is to be transported while in a rack, we recommend supporting the rear of the chassis. This will help prevent the unit from being damaged from the increased mechanical stresses of portable and mobile use. The DSP30's chassis includes integral rear mounting tabs for securing to the rack mounting ears. 6 Installation: Balanced Audio Connections Connecting Audio Inputs and Outputs All audio connections should be balanced to ensure the best performance. Unbalanced signals may be used if necessary; follow the wiring guidelines below for recommended unbalanced termination. The audio input jacks are female 3-pin XLR /TRS "combo" connectors. They will accept male XLR plugs or TRS (tip-ring-sleeve) 1/4-inch phone plugs. The audio output jacks are male 3-pin XLR connectors. BALANCED Balanced connection is recommended for all inputs. The XLR - TRS "combo" inputs are electronically balanced. Balanced input cables are recommended to minimize noise pick up and prevent ground loops. Refer to the pinouts provided (below) for proper connection. XLR TRS (1/4 inch) TRS- tip, ring, sleeve (3 conductors) Suitable only for inputs. 7 Installation: Unbalanced Audio Connections Connecting Audio Inputs and Outputs All audio connections should be balanced to ensure the best performance. Unbalanced signals may be used if necessary; follow the wiring guidelines below for recommended unbalanced termination. The audio input jacks are female 3-pin XLR /TRS "combo" connectors. They will accept male XLR plugs or TRS (tip-ring-sleeve) 1/4-inch phone plugs. The audio output jacks are male 3-pin XLR connectors. UNBALANCED Unbalanced inputs can be used if required. If unbalanced audio sources are used, it is preferable to use an appropriate audio transformer (or other unbalanced-to-balanced "converter") to provide a balanced input. If this is not possible, then it is recommended that the negative terminal and shield terminal be connected to one another with a jumper wire. XLR TS (1/4-inch phone) This style of plug automatically connects the negative terminal to shield when inserted in the jack. TRS (1/4-inch) NOTE for above abbreviations: TRS- tip, ring, sleeve (3 conductors) TS- tip, sleeve (2 conductors) 8 Installation: Connecting Audio Connections Audio Inputs and Outputs Once the input and output cables have been properly wired, they can be connected to the receptacles on the rear panel of the DSP-30. INPUTS- Input jacks are "combo" style. They accept either male XLR or 1/4-inch diameter TRS phone plugs. Plug line level audio source into the input jacks. Use balanced connections wherever possible. OUTPUTS- Output jacks are male XLR style. They accept female XLR plugs. Connect the DSP outputs to the next audio device in the signal chain (this is usually a professional audio power amplifier). Use balanced connections wherever possible. Rear Panel Audio Connections Basic Audio Connections The basic application shown is representative of most simple installations. The audio source outputs (console output, media player) are connected to the DSP's input ja ...