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Hardware Manual
DSP-30
2.2 XLR
Rack-mount, 2 Channel Digital Signal Processor
*TD-000097-00*
TD-000097-00
Rev.B
1
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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 RECOMMENDA- TIONS SET FORTH IN THE OWNER’S MANUAL FOR THE INTEGRATION OF THE DSP AND SIGNAL MANAGER SOFT
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Table of Contents INTRODUCTION Product Overview..................................................................4 Front and Rear Panel Illustrations and Dimensions.................4 INSTALLATION Unpacking..................................................................................................6 What is Included...................................................................................6 Mounting......................................................................................
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Introduction: Overview and Illustrations Overview reconfigure, and unmute in a fraction of a second, providing The DSP-30 and Signal Manager software combine easy-to- smooth transitions free of thumps, clicks and other undesir- use, customizable, two-channel DSP with simple operating- able audio artifacts. The contact closure input feature allows mode selection that requires only two buttons to operate. It for instantaneous gain changing and other programmable can be used with all amplifiers and
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Introduction: Illustrations and Dimensions Dimensions 5
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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 Description Q
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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
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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 inpu
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Installation: Connecting Audio Inputs and Outputs Audio Connections 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 Rear Panel Audio input jacks. Use balanced connections wherever Connections possible. OUTPUTS- Output jacks are male XLR style. They accept female XLR plu
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Installation: Connecting to the RS-232 Port Connecting to the RS-232 Port Connect to the RS-232 port using the 9-pin serial data cable (included in the shipping box). Orient the DB-9 plug correctly, insert the plug fully into the RS-232 port and finger-tighten the retaining screws. The cable length should be 25 feet or less. “Null-modem” type cables will NOT work. Connection to the computer is required only while loading the presets into the DSP-30 or for “real-time” adjustments to a configurat
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Installation: System Requirements and Software Installation The DSP-30 relies on the Signal Manager software for its DSP signal chains or configurations. You must use the supplied software to design your configurations and then load those configurations into the DSP-30 using a simple RS-232 connection. The DSP-30, as shipped from the factory, is configured to pass audio signals from input to output unaffected for all 8 presets. Use the software’s Help System for instructions on how to use the Si
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Use: Control, Indicator, and Connector Descriptions FRONT PANEL POWER switch- This rocker switch POWER indicator- This blue LED illu- turns the unit on by pressing the top minates when the unit has power prop- side of the switch. Turn off by pressing erly applied and the power switch is in the bottom side of the switch. the “On” position. CHANNELS- These green LED’s illu- NUMERIC DISPLAY- This multi-seg- minate when the unit detects an input ment numeric display indicates the pre- signal on ea
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Use: Control, Indicator, and Connector Descriptions RS-232- This DB-9 female jack is for attaching the serial cable between the unit and the computer. Use this connection for loading your DSP configurations from the computer to the DSP and for “real-time” configuration tuning with Signal Manager software. NOTE! Pressing the ACCEPT button and holding for at PRESET SELECTIONS buttons- least 3 seconds locks (disables) the BROWSE key to BROWSE- increments the Preset Memory and the Preset prevent a
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Use: General Use Guidelines and Preset Description IMPORTANT! Please read before operating this Digital Signal Processor with your audio system. General Use Guidelines As a general rule, DO NOT CREATE SIGNAL LOOPS! Do not mix This is a professional level DSP product that allows the user to the output of a DSP object back into its own input! There is produce virtually unlimited signal processor variations and nothing useful to achieve by doing this, you will only create an configurations. Becau
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Use: Saving Presets Using QSC’s Signal Manager software Presets The DSP-30 must be loaded with your desired presets using the Signal Manager program before use. Test all new presets for expected behavior at low power levels to avoid inadvertently damaging speaker systems. The DSP-30 has eight Preset memories numbered 1 through 8. Presets are DSP configurations saved to memory in the DSP. Only one preset may be active at one time. The possible configurations of the presets are essentially limitl
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Use: How to Recall a Preset from the Front Panel TO RECALL A PRESET- 1- Press the BROWSE key until the desired preset number shows in the display. The selection display flashes until Step 2 (below) is completed. 2- Press the ACCEPT key to activate the selected preset in the DSP. Once the preset is active, the display will stop flashing. Note! The ACCEPT button must be pushed within 30 seconds of selecting the preset. If a longer time passes, the DSP-30 will revert to its original pr
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Use: LOCK OUT Feature TO LOCK THE FRONT PANEL BUTTONS (Browse and Accept pushbuttons)- 1- Press the Accept button and hold it down for at least three seconds. 2- The “lock” indicator will illuminate. 3- The Browse button is disabled. Press the Accept button and hold for three seconds to lock/unlock the preset selection. UNLOCKED LOCKED FRONT PANEL DISPLAY- Example shows Preset 7 in LOCK INDICATOR “unlocked” and “locked” state. illuminated when locked TO UNLOCK FRONT PANEL BUTTONS- 1
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Use: Contact Closure Feature Contact Closure Feature The contact closure feature is used to trigger gain changes All switched gain objects in a DSP configu- in the DSP. Any configuration that uses one or more ration will be triggered by the one contact switched gain objects (see Signal Manager software Help closure. It is not possible to trigger file ) can take advantage of this feature. The contact switched gain objects individually! closure will trigger all switched gain objects at once. Wirin
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Use: RS-232 Pinout RS-232 Pinout: The diagram below shows the pin assignments for the female RS-232 connector on the DSP. Pin Signal Description 1 DCD 2 TD 3 RD 4 DTR 5 GND 6 DSR 7 RTS 8 CTS 9 Contact Closure *Note! Pin 9 is used for contact closure input. This pin is not normally used by RS- 232 devices. Some laptop and desktop computer COM ports have been observed to “pull” pin 9 to ground; this will cause unexpected behavior of the contact closure function if pin 9 is not disc
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Use: Application Example TRI-AMPED PA CABINETS WITH SUBWOOFER (refer to illustration at right) This is highly generalized, but shows the main idea in cre- limiting. DSP #3 (assigned to low frequency drivers) might ating larger systems. In this example, the audio source provide a 45 Hz to 1100 Hz bandpass with EQ to remove material is connected to the inputs of all four DSP’s. Take modal resonances of the listening environment. DSP #4 care to keep right and left channel signals connected to the (
