*PROTOTYPE* This unit is for testing/demonstration purposes only. Use with caution. Unit must be returned to QSC upon completion of testing. This unit is a prototype and is not for sale. This unit has not been fully tested or qualified. DSP-3 Digital Signal Processor Amplifier Accessory Hardware Manual TD-000087-00 TD-000087-00 Rev.
APPLICATION NOTES: •Full feature set, Direct-mounting, No external power or special interconnect cables required. The DSP-3 is fully compatible with the following QSC Audio Products power amplifiers: CX series: DCA series: PL2 series: PL2A series: CX302 DCA1222 PL218 All CX302V DCA1622 PL224 CX502 DCA2422 PL230 CX602V DCA3022 PL236 CX702 DCA3422 CX902 CX1102 CX1202V •Remote Mounting Required, DSP Remote Mount Cable required: Full feature-set, no external power required.
TABLE OF CONTENTS Application information by amplifier model.................................................................................................2 Explanation of Graphical Symbols and FCC Statement...........................................................................................4 Section 1: INTRODUCTION Overview......................................................................................................5 Basic Connector & Indicator Descriptions.................................
EXPLANATION OF GRAPHICAL SYMBOLS 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.
Section 1: Introduction- Overview The DSP-3 is a digital signal processor (or DSP ) accessory for Connections include two D-sub type connections; a DB-9 audio power amplifiers designed to reduce the need for exter- connector acts as the RS-232 interface and an HD-15 through- nal signal processing while increasing overall system reliability connector provides the DataPort interface to a CM16a Amplifier through distributed intelligence. It is intended primarily for Network Monitor (if used).
Section 1: Introduction- Basic Connector & Indicator Descriptions Below are listed the connector and indicator callouts as they appear on the DSP-3. The bold type indicates the actual labeling on the DSP-3. A brief description of each is provided. “Front”-side connectors & indicatorsCH 1 INPUT- This 3-pin terminal-block jack is where you connect the audio line level input to the DSP-3’s channel #1 input block. It is an electronically balanced input with an input impedance of 7.5k Ohm (7,500 Ohms).
Section 1: Introduction- Physical Layout Illustration DSP-3 Overall view DSP-3 front panel (exposed side) DSP-3 rear panel (amplifier side) 7
Section 1: Introduction- List of Functions & Features DSP-3 Hardware Features (full set available to QSC DataPort equipped amplifiers): High- and Low-Pass Crossover Filters 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 curve provided in software Apply Filter (filter in or out) Adjustable frequency & slope Ability to bypass all EQ with a single command Ability to add or delet
Section 1: Introduction- List of Functions & Features Parametric EQ Adjustable frequency Adjustable gain Adjustable Q factor Ability to bypass all EQ with a single command Ability to add or delete EQ Assignable anywhere in the signal chain Apply EQ (EQ in or out) Signal Compressor Adjustable attack and release times Adjustable threshold Adjustable compression ratio Graphical response curve provided in software Assignable anywhere in the signal chain Apply compressor (compressor in or out) Signal Level M
Section 1: Introduction- Block Diagram 10
Section 1: Introduction- Technical Overview This portion of the introduction provides some of the technical details of the DSP-3. Audio Input Path There are two audio channels each with two input connectors, a balanced 3-pin ‘euro’ terminal block jack and a pseudo balanced DataPort input. The inputs are protected with a filter that prevents radio frequency interference. Each input has a selectable input sensitivity of 10dBV, +4dBu, +12dBu, or +18dBu to properly scale the input signal to the CODEC inputs.
Section 2: Installation- Basics and Mounting 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 DSP-3 is adequately protected for shipment (strong box of appropriate size , sufficient packing material).
Section 2: Installation- Remote mounting (4-ch., Powerlight & non QSC amp’s) 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 nonQSC amplifiers also requires remote mounting. Keep in mind that all applications that use amplifiers that do not have a DataPort ( i.e.
Section 2: Installation- Connections CONNECTING AUDIO INPUTS AND OUTPUTS: Whenever possible, use balanced connections for the lowest possible noise levels and for minimizing the possibility of hum inducing ground loops. 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 need for any tools.
Section 2: Installation- Connections CONNECTING TO THE DATAPORT- This section applies to those users interfacing with the QSC CM16a Amplifier Network Monitor and those users interfacing the DSP-3 to a PL6.0 or PL9.0 amplifier. This connection is made with a special 15-pin cable similar to VGA computer monitor cables. Do not use VGA cables as they are not supplied with pin #9 (exception PL6.0 and PL9.0 MUST use VGA type cable or the special cable with pin #9 removed).
Section 2: Installation- Connections 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 the DSP-3 effect the signal provided to the output connectors as well.
Section 2: Installation- Software Installation & BETA Release Warning These instruction apply to the June, 2000 BETA release of the Signal Manager application. Software Installation1. Insert the CD labeled QSC DSP-3 Signal Manager into your CD drive (typically drive “D:”). 2. Run D:\Setup.exe and follow the instructions displayed. 3. When the installation is complete, you will be presented with a screen that asks you to view the “Readme” file.
Section 3: Specifications Input Signal Processing Frequency response 20 Hz–10 kHz ±0.3 dB 20 Hz–20 kHz ±0.7 dB Distortion <0.01% THD+N @ +4 dBu out Dynamic range >95 dB unweighted 20 Hz–20 kHz Polarity In-phase or inverted Mute >90 dB attenuation Inputs Program inputs Connector type 2 “Phoenix-style” (a.k.a.
Section 3: Specifications General Physical Height Width Depth 3.50 inches 3.75 inches 1.38 inches Weight Mounting 0.59 lbs (0.27 kg) Rear support recommended for portable or mobile use Operating temperature 0 to 50° Celsius AC Power (applicable for 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 Termination Detachable power cord with 2.
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 audio channel, the DSP shall provide a peak limiter that is assignable anywhere in the signal chain and can be switched on or off.
Section 5: Appendix- DataPort Pinout DATA PORT PINOUT The diagram below shows the pin assignments used for the HD-15 connectors on the DSP-3 and amplifier. NOTE! This information is shown for reference only and is subject to change without notice as the DataPort feature is specific to QSC products and not intended for interface to other manufacturer’s equipment.
Section 5: Appendix- RS-232 Port Pin-out & Connector P-N’s RS-232 PINOUT: The diagram below shows the pin assignments for RS-232. Pin 1 2 3 4 5 6 7 8 9 Signal Description DCD RD TD DTR Signal GND DSR RTS CTS contact closure 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.
Section 6: How to Contact QSC Audio Products ADDRESS: QSC Audio Products, Inc. 1675 MacArthur Boulevard Costa Mesa, CA 92626-1468 USA TELEPHONE NUMBERS: Main Number (714) 754-6175 Sales Direct Line (714) 957-7100 Sales & Marketing (800) 854-4079 toll free in U.S.A. only Technical Services (714) 957-7150 (800) 772-2834 toll free in U.S.A. only FACSIMILE (FAX) NUMBERS: Sales & Marketing FAX (714) 754-6174 Technical Services FAX (714) 754-6173 WORLD WIDE WEB: http://www.qscaudio.
1675 MacArthur Boulevard Costa Mesa, California 92626 USA PH: (714) 754-6175 FAX: (714) 754-6174 “QSC” and the QSC logo are registered with the U.S.
