QSC Audio DSP-3 manual

DSP-3 Digital Signal Processor Amplifier Accessory Hardware Manual *TD-000087-00* TD-000087-00 Rev .D[...]

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3 T ABLE OF CONTENTS Warnings, Explanation of Graphical Symbols, and FCC Statement ..............................................................4 Section 1: INTRODUCTION Overview ......................................................................................................5 General Use Guidelines............................................[...]

EXPLANATION OF GRAPHICAL SYMBOLS The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsu- lated “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 equi[...]

Section 1: Introduction- Overview 5 The DSP-3 is a digital signal processor ( or DSP ) accessory for audio power amplifiers designed to reduce the need for exter- nal signal processing while increasing overall system reliability through distributed intelligence. It is intended primarily for QSC’s CX, DCA, and Powerlight2 series amplifiers and mou[...]

IMPORTANT! Pleas read before operating the DSP-3 with your audio system. The DSP-3 is a professional level DSP product that allows the user 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 config[...]

This quick start section is for those users who want to get up and running with the DSP-3 and Signal Manager software as quickly as possible. It is in no way a substitute for reviewing the contents of the entire hardware manual. It is intended for people familiar with the equipment discussed and should be followed up with a review of the manual and[...]

Section 1: Introduction- Quick Start 3 CONNECT THE AUDIO INPUTS If your using....... the CHANNEL 1 INPUT & CHANNEL 2 INPUT connectors the DataPort input (QSC CM16a or related products) Then you need to...... connect your input signal source to terminal block connectors (refer to page 18) and plug the connectors into the CHAN- NEL 1 INPUT and CH[...]

9 Section 1: Introduction- Quick Start 5 INST ALL THE SOFTW ARE 1. Place the QSC Signal Manager CD in your computer’s CD drive (typically the D: drive). The installation program should run automatically after several seconds; if it does not, then proceed with step 2: 2. Run D:Setup.exe (replace D: with the drive letter designator appropriate fo[...]

6 EST ABLISH COMMUNICA TION BETWEEN THE DSP-3 & THE COMPUTER Section 1: Introduction- Quick Start At this point, you should have everything “up and running”. In the Signal Manager application, check the COMMUNICATION STATUS PANE (lower right corner of the Signal Manager window, see above). If the COMMUNICATION STATUS PANE indicates..... ONL[...]

Section 1: Introduction- Quick Start The last applied configuration that is “running” in the DSP-3 when it is turned off becomes the active configuration again once the power is turned back on to the DSP-3. This ensures that the system “comes up” just as it was left last time it was powered down. If you decide to edit an existing configurat[...]

Section 1: Introduction- Basic Connector & Indicator Descriptions 12 RS-232 - This DB-9 fe- male jack is where the serial cable between the DSP-3 and the computer is plugged in. FRONT P ANEL CH 1 INPUT, CH 2 INPUT - These terminal-block jacks (receptacles) are where you connect the line-level audio inputs to the DSP-3. They are electronically b[...]

Section 1: Introduction- Basic Connector & Indicator Descriptions 13 REAR P ANEL OVERALL DATAPORT (unlabeled)- This is the “output” DataPort. If the DSP-3 is directly mounted on a 2-RU QSC DataPort equipped amplifier, this connector plugs into the amplifier’s DataPort connector. If used with 3-RU QSC DataPort equipped amplifi- ers, the DS[...]

Section 1: Introduction- List of Functions & Features 14 DSP-3 Hardware Features (full set available to QSC DataPort equipped amplifiers): High- and Low-Pass Crossover Selectable responses: Butterworth (6,12,18 or 24 dB per octave slope) Bessel (6,12,18 or 24 dB per octave slope) Linkwitz-Riley (12 or 24 dB per octave slope) Graphical response [...]

Section 1: Introduction- List of Functions & Features 15 Parametric EQ Adjustable frequency Adjustable gain Adjustable Q factor Ability to bypass all EQ with a single mouse click Ability to add or delete EQ Graphical response curve provided in software Assignable anywhere in the signal chain Signal Compressor Adjustable attack and release times[...]

Section 1: Introduction- Block Diagram 16[...]

Section 1: Introduction- T echnical Overview 17 Audio Input Path There are two audio channels each with two input connectors, a balanced 3-pin ‘euro’ terminal block jack and an electronically balanced DataPort input. The inputs are protected with a filter that prevents radio frequency interference. The inputs have software- selectable full scal[...]

Section 2: Installation- Unpacking and Mounting 18 UNPACKING There are no special unpacking precautions for the DSP-3. However, it is recommended that you keep the original packing material for reuse in the rare event that service be required for your DSP-3. If service is required and the original packing material is not available, insure that the [...]

Section 2: Installation- Remote mounting (4-ch., Powerlight & non QSC amp ’ s) 19 REMOTE MOUNTING THE DSP-3 : 4-Channel CX and DCA , Powerlight series, and all non-QSC amplifiers Use of the DSP-3 with the 4-channel CX and DCA and all Powerlight amplifiers requires the remote mounting of the DSP-3. Use with non- QSC amplifiers also requires re[...]

20 Section 2: Installation- Connections CONNECTING AUDIO INPUTS AND OUTPUTS: The audio inputs and outputs of the DSP-3 use 3-pin “Phoenix”-type (Euro-style) terminal block connectors. These connectors allow pre- wiring of inputs without any soldering and allow for rerouting of audio inputs by simply interchanging connector locations without the[...]

21 Section 2: Installation- Connections DATAPORT Connection- This section applies to those users interfacing with the QSC DataPort products. If using the DataPort for your audio inputs, DO NOT use the terminal block inputs. If the DataPort is used only for control & monitoring of the amplifier (no audio input through the DataPort), then audio i[...]

Section 2: Installation- Connections 22 DAISY-CHAINING THE DSP-3 OUTPUTS TO ADDITIONAL AMPLIFIERS The DSP-3 provides audio output jacks for each channel. These outputs may be used for daisy-chaining the post-DSP signal to other amplifiers or for monitoring purposes. The signal on the output jacks is post-DSP. All signal processing functions done by[...]

Section 2: Installation- Application Examples DSP-3 Directly Mounted to QSC Amplifier. Audio Inputs via Terminal Block Inputs DSP-3 Directly Mounted to QSC Amplifier. Networked OR Local Control. Audio Inputs via DataPort. The following examples show basic hook up information that assumes a two-channel, full range audio signal driving the load. Refe[...]

Section 2: Installation- Application Examples DSP-3 Remotely Mounted used with QSC DataPort Amplifier. Audio Input via Terminal Block Inputs DSP-3 Directly Mounted to QSC Amplifiers, Networked Control via QSCcontrol Products 24 NOTE: External accessory power supply may be required on older models, see Appendix for application information.[...]

DSP-3 Remotely Mounted connected to any Non-DataPort Amplifier. Audio Input via Terminal Block Inputs Section 2: Installation- Application Examples 25[...]

26 Section 3: Signal Manager Software- Software Installation Software Installation- 1. Insert the CD labeled QSC DSP-3 Signal Manager into your CD drive (typically drive “D:”). If your computer has AUTORUN enabled, the installation utility will start automatically. If it does not, then proceed to step 2, below. Otherwise, proceed to step 3. 2. [...]

Section 3: Specifications Frequency response 20 Hz–10 kHz ±0.3 dB (term. block inputs) at 3dB below full 20 Hz–20 kHz ±0.7 dB (term. block inputs) scale input voltage 20 Hz–20 kHz±0.2 dB (DataPort inputs) Distortion <0.01% THD+N @ +4 dBu out Delay (throughput) 687.5 microseconds Dynamic range >93 dB unweighted 20 Hz–20 kHz, 1.5V, 4[...]

Dimensions Physical Height 3.50 inches Width 3.75 inches Depth 1.38 inches Weight 0.59 lbs (0.27 kg) Mounting Direct mount to amplifier or remote mount Operating temperature 0 to 50° Celsius Accessory External Power Supply AC Input Voltage 80–240 VAC AC Input Current 0.3 Amps rms Frequency 50 to 60 Hz Output Voltage 15 VDC Output Current 300 mil[...]

Section 4: Architect ’ s and Engineer ’ s Specifications The Digital Signal Processor (DSP) shall provide two independent channels of DSP for signal delivery to QSC DataPort equipped power amplifiers. The processing shall be distributed with the DSP module mounted directly to the rear of the power amplifiers. Output Peak Limiter —For each aud[...]

Section 5: Appendix- DataPort Pinout Description of Encode Signals encode 1 Bridge mode & power detect encode 2 Temperature, channel 1 encode 3 Standby mode detect encode 4 Temperature, channel 2 DA T A PORT PINOUT The diagram below shows the pin assign- ments used for the HD-15 connectors on the DSP-3 and amplifier. NOTE! This information is s[...]

Section 5: Appendix- RS-232 Port Pinout & Connector P-N ’ s 31 TERMINAL BLOCK CONNECTOR PART NUMBER REFERENCE - The following manufacturers and part numbers are provided as a reference to users. The information here is subject to change without the knowledge of QSC. 3 pin without integral strain relief: Phoenix Contact - 17 57 02 2; Riacon - [...]

32 • Remote Mounting and External Power required. No DataPort Connection possible, Power Limiting not available. ISA series: The ISA amplifiers have a “V2” DataPort that may be used for audio inputs only. MX series: All PLX series: All RMX series All USA series: All ALL non-QSC amplifiers are can be used with the DSP-3. Section 5: Appendix- A[...]

Section 5: Appendix- Preset Operation Notes SPECIAL INFORMATION CONCERNING SAVED DSP-3 CONFIGURATIONS The computer which is used to create the DSP-3 signal flow configurations, and subsequently save them to disk, should be the same computer used to modify and adjust the DSP-3 settings in the future. Naturally, this might not always be the case. At [...]

Section 6: Maintenance, W arranty & QSC Contact Information Cleaning The faceplate and chassis can be cleaned with a soft cloth and nonabrasive, mild cleaning solution. Products like Simple Green and Windex work well. Do not use powders or scrubbing pads of any type as they are usually abrasive and will permanently damage the finish of your DSP[...]

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1675 MacArthur Boulevard Costa Mesa, California 92626 USA PH: (714) 754-6175 FAX: (714) 754-6174 © Copyright 2001, 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[...]