DSP-3 Digital Signal Processor - QSC

1 DSP-3 Digital Signal ProcessorAmplifier Accessory Hardware Manual*TD-000087-00*TD-000087-00 page intentionally left OF CONTENTSW arnings, Explanation of Graphical Symbols, and FCC 1: Use & Indicator Descriptions, Features and 2: is to QSC DataPort Equipped to the Accessory Remote Mounting Audio Inputs and to the DataPort of the to RS-232 the DSP-3 to Accessory External DC Power 3: Signal MANAGER SOFTWARES ystem 4: 5: ARCHITECT S & ENGINEER S 6: APPENDIXDataPort Pinout ..31 Terminal Block Connector Part Number Operation 7: QSC INFORMATIONM aintenance, Warranty & QSC Contact Copyright 2001, 2002, QSC Audio Products, is a registered trademark of QSC Audio Products, Inc.

2 , Costa Mesa, CA QSC and the QSC logo are registered with the Patent and Trademark OfficeEXPLANATION OF GRAPHICALSYMBOLSThe lightning flash with arrowhead symbol, within anequilateral triangle, is intended to alert the user to thepresence of uninsulated dangerous voltage withinthe product s enclosure that may be of sufficientmagnitude to constitute a risk of electric shock exclamation point within an equilateral tri-angle is intended to alert the users to the pres-ence of important operating and maintenance(servicing) instructions in the literature accom-panying the : To reduce the risk of electricshock, do not remove the cover. No user-serviceable parts inside. Refer servicing toqualified service : To prevent fire or electric shock,do not expose this equipment to rain OF ELECTRIC SHOCKDO NOT OPENF ederal CommunicationsCommission (FCC)InformationNOTE: This equipment has been tested and found tocomply with the limits for a Class B Digital device,pursuant to Part 15 of the FCC Rules.

3 These limits aredesigned to provide reasonable protection againstharmful interference in a residential installation. Thisequipment generates, uses, and can radiate radiofrequency energy and, if not installed and used inaccordance with the instructions, may cause harmfulinterference to radio communications. However, thereis no guarantee that interference will not occur in aparticular installation. If this equipment does causeharmful interference to radio or television reception,which can be determined by turning the equipment offand on, the user is encouraged to try to correct theinterference by one or more of the following mea-sures:-Reorient or relocate the receiving the separation between the equipment andthe the equipment into an outlet on a circuitdifferent from that to which the receiver is the dealeror an experiencedradio/TV tech-nician for energy can perform many useful functions.

4 This unithas been engineered and manufactured to assure your personalsafety. Improper use can result in potential electrical shock or firehazards. In order not to defeat the safeguards, observe thefollowing instructions for its installation, use and SAFETY INFORMATION: PLEASE REVIEW!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) CONFIGURATIONSTHAT MAY BE APPLIED TO THE DSP BY THE USER, QSC CANNOT BE HELD RESPONSIBLE FOR DAMAGES RESULTING FROM ANY DEVIATIONOR FAILURE BY THE USER TO STRICTLY FOLLOW THE RECOMMENDATIONS SET FORTH IN THE OWNER S MANUAL FOR THE INTEGRATIONOF THE DSP-3 AND Signal MANAGER SOFTWARE WITH YOUR SOUND RISKS ATTENDANT TO INTEGRATION OF USER-CONFIGURABLE DSP PRODUCTS WITH YOUR SOUND SYSTEM ARE ASSUMED BY QSC STRIVES TO SUPPLY THE HIGHEST QUALITY TECHNICAL SOLUTIONS FOR Digital Signal PROCESSING, IN NO EVENT WILLQSC OR ITS SUPPLIERS BE HELD LIABLE FOR ANY DAMAGES, CONSEQUENTIAL, INCIDENTAL, OR OTHERWISE.

5 INCLUDING ANY CLAIMSFOR LOST PROFITS AND/OR SAVINGS RESULTING FROM ANY ATTEMPTED INTEGRATION OF THE DSP-3 AND Signal MANAGERSOFTWARE WHICH DOES NOT STRICTLY ADHERE TO THE MANUAL S 1: Introduction- Overview5 The DSP-3 is a Digital Signal Processor (or DSP ) accessory foraudio power amplifiers designed to reduce the need for exter-nal Signal processing while increasing overall system reliabilitythrough distributed intelligence. It is intended primarily forQSC s CX, DCA, and Powerlight2 series amplifiers and mountsdirectly to the rear panel of the 2-RU, 2-channel models of theseamplifiers. Pre-August, 1999 date-code of the CX, DCA andPowerlight2, and all ISA models will require use of an externalpower supply. Use of the DSP-3 with Powerlight modelsrequires remote mounting, external power supply and use of aspecial interconnect cable ( only).

6 Refer to the Appen-dix for application information. The DSP-3 can also be usedwith amplifiers that do not have a QSC DataPort (older QSCmodels, non-QSC models) with a reduced feature set and remote mounting/external Signal processing capabilities include an Input Com-pressor-limiter, multiple Parametric Filters, High- and Low-PassFilters, a Shelf Filter, Muting, Attenuation, Multiple Delays,Polarity Reversal, Audio Routing and Post Crossover AudioMixing. Analog-to- Digital and Digital -to-analog converters are24 bit resolution, 48 kHz. sampling rate. Additionally, the post-DSP output signals are daisy-chainable for connection to asecond amplifier. Input sensitivity is selectable and dynamicrange is greater than 93 dB. Inputs and the post-DSP outputs areelectronically balanced.

7 See Hardware Features for , the DSP-3 is a small module that piggybacks onto the back panel of the specified QSC amplifiers. It connectsdirectly to the DataPort on the back panel and is secured withsupplied hardware. When used with other amplifiers, the DSP-3 is mounted remotely on a rack-mount accessory that providesa solid physical mounting include three D-sub type connections; a DB-9connector acts as the RS-232 interface and an HD-15 through-connector provides the DataPort interface to the amplifier andother QSC DataPort products (if used). The exposed side hasfour terminal block connectors; 2 audio inputs and 2 post DSPoutputs. There is also a power receptacle for using the DSP-3with amplifiers that do not provide the required power throughtheir DataPort, such as the ISA-series, older QSC amplifiers andnon-QSC amplifiers.

8 There are two LED s; a blue one to indicatepower status and a green one to indicate the presence of aninput Signal to the of the DSP-3 is accomplished with the supplied QSCS ignal Manager software. Networked control using theQSControl platform is also possible (refer to QSControl docu-mentation for details). Please refer to the software documenta-tion (software Help file and file) for feature-set andoperation information. This software provides an easy-to-usegraphical user interface where DSP objects are placed ontoa palette and interconnects are drawn. This interface allows foralmost infinite configuration of the DSP-3 to the host computer is made byconnecting a serial cable between the DSP-3 s RS-232 port andthe host PC s available COM port. Once the DSP-3 has beensetup as desired and the configuration saved to the DSP-3 ,connection to the PC is no longer required.

9 This feature allowsessentially tamper-proof amplifier DSP setup. Further changescan be implemented in the field by simply connecting a PC ( computer) and loading the new setup into the : Powerlight and Powerlight amplifiers require that pin #9 be removed from the remotemounting interconnect cable. Amplifier damage may result from use of cable that has pin #9 connections VGA computer monitor cables have pin #9 removed and are usable. Check before use!IMPORTANT! Pleas read before operating the DSP-3with your audio DSP-3 is a professional level DSP product that allows theuser to produce virtually unlimited Signal Processor varia-tions and configurations. Because of the infinite configura-tion possibilities of Digital Signal processing and the DSP-3 ,it is possible to create configurations that may result inunwanted signals or uncontrollable outputSignal Manager has no way of knowing if the DSP configu-ration you have designed will produce the results you intendto produce.

10 You can create Signal loops in your configurationthat may oscillate and you may damage your sound systemif you apply such configurations to the DSP-3 . When applyingan untested configuration or when designing or experiment-ing with the DSP-3 , it is a very good idea to turn down theamplifier s physical gain controls. That way, you won tdamage your speakers or create very loud sounds if you applya configuration that doesn t do what you thought it a general rule, DO NOT CREATE Signal LOOPS! Do notmix the output of a DSP object back into its own input! Thereis nothing useful to achieve by doing that, you will only createan oscillator that could damage you speakers. Also, USE THESINE AND NOISE GENERATOR OBJECTS WITH GREAT CAU-TION! These objects produce signals that can harm yourspeakers.