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QSC DSP-3' Hardware manual
DSP-3
Digital Signal Processor
Amplifier Accessory Hardware Manual
*TD-000087-00*
TD-000087-00 Rev.E
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TABLE OF CONTENTS
Warnings, Explanation of Graphical Symbols, and FCC Statement..............................................................4
Section 1: INTRODUCTION
Overview......................................................................................................5
General Use Guidelines..................................................................6
QuickStart Guide............................................................................7
Connector & Indicator Descriptions, Illustrations.................12
Hardware Features and Functions...........................................14
Block Diagram..........................................................................................16
Technical Overview..................................................................................17
Section 2: INSTALLATION
Unpacking..................................................................................................18
What is Included...................................................................................18
Mounting to QSC DataPort Equipped Amplifiers..................................18
Mounting to the Accessory Remote Mounting Bracket......................19
Connecting Audio Inputs and Outputs...................................................20
Connecting to the DataPort of the DSP-3.................................................21
Connecting to RS-232 Port........................................................................21
Daisy-chaining the DSP-3 Outputs.........................................................22
Connection to Accessory External DC Power Supply.................22
Applications Examples....................................................................23
Section 3: SIGNAL MANAGER SOFTWARE
System Requirements...........................................................................26
Software Installation...........................................................................26
Section 4: SPECIFICATIONS.........................................................................................................................................27
Section 5: ARCHITECT’S & ENGINEER’S SPECIFICATION.....................................................................................29
Section 6: APPENDIX
DataPort Pinout.........................................................................................30
RS-232 Pinout ............................................................................................31
Terminal Block Connector Part Number Reference.............................31
Application Information...............................................................32
Preset Operation Notes.................................................................................33
Section 7: QSC INFORMATION
Maintenance, Warranty & QSC Contact Information................................34
© Copyright 2001, 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
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-3 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-3 AND SIGNAL MANAGER
SOFTWARE WHICH DOES NOT STRICTLY ADHERE TO THE MANUAL’S RECOMMENDATIONS.
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 residential installation. This
equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in
IMPORTANT SAFETY INFORMATION: PLEASE REVIEW!
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.
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.
accordance with the instructions, may cause harmful
interference to radio communications. However, there
is no guarantee that interference will not occur in a
CAUTION
particular installation. If this equipment does cause
RISK OF ELECTRIC SHOCK
DO NOT OPEN
harmful interference to radio or television reception,
which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
-Reorient or relocate the receiving antenna.
CAUTION: To reduce the risk of electric
shock, do not remove the cover. No userserviceable parts inside. Refer servicing to
qualified service personnel.
WARNING: To prevent fire or electric shock,
do not expose this equipment to rain or
moisture.
-Increase the separation between the equipment and
the receiver.
SAFEGUARDS
Electrical energy can perform many useful functions. This unit
-Connect the equipment into an outlet on a circuit
different from that to which the receiver is conneted.
4
has been engineered and manufactured to assure your personal
safety. Improper use can result in potential electrical shock or fire
-Consult the dealeror an experiencedradio/TV tech-
hazards. In order not to defeat the safeguards, observe the
nician for help.
following instructions for its installation, use and servicing.
Section 1: Introduction- Overview
The DSP-3 is a digital signal processor (or DSP ) accessory for
3 is mounted remotely on a rack-mount accessory that provides
audio power amplifiers designed to reduce the need for exter-
a solid physical mounting platform.
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 mounts
directly to the rear panel of the 2-RU, 2-channel models of these
amplifiers. Pre-August, 1999 date-code of the CX, DCA and
Powerlight2, and all ISA models will require use of an external
power supply. Use of the DSP-3 with Powerlight models
requires remote mounting, external power supply and use of a
special interconnect cable (PL6.0/9.0 only). Refer to the Appen-
dix for application information. The DSP-3 can also be used
with amplifiers that do not have a QSC DataPort (older QSC
Connections include three D-sub type connections; a DB-9
connector acts as the RS-232 interface and an HD-15 throughconnector provides the DataPort interface to the amplifier and
other QSC DataPort products (if used). The “exposed” side has
four terminal block connectors; 2 audio inputs and 2 post DSP
outputs. There is also a power receptacle for using the DSP-3
with amplifiers that do not provide the required power through
their DataPort, such as the ISA-series, older QSC amplifiers and
non-QSC amplifiers. There are two LED’s; a blue one to indicate
power status and a green one to indicate the presence of an
input signal to the DSP-3.
models, non-QSC models) with a reduced feature set and
“remote” mounting/external power.
Control of the DSP-3 is accomplished with the supplied QSC
Signal Manager software. Networked control using the
The signal processing capabilities include an Input Compressor-limiter, multiple Parametric Filters, High- and Low-Pass
Filters, a Shelf Filter, Muting, Attenuation, Multiple Delays,
Polarity Reversal, Audio Routing and Post Crossover Audio
Mixing. Analog-to-digital and digital-to-analog converters are
24 bit resolution, 48 kHz. sampling rate. Additionally, the postDSP output signals are daisy-chainable for connection to a
QSControl platform is also possible (refer to QSControl documentation for details). Please refer to the software documentation (software Help file and Readme.txt file) for feature-set and
operation information. This software provides an easy-to-use
graphical user interface where DSP “objects” are placed onto
a palette and interconnects are drawn. This interface allows for
almost infinite configuration possibilities.
second amplifier. Input sensitivity is selectable and dynamic
range is greater than 93 dB. Inputs and the post-DSP outputs are
electronically balanced. See Hardware Features for complete
Connection of the DSP-3 to the host computer is made by
connecting a serial cable between the DSP-3’s RS-232 port and
the host PC’s available COM port. Once the DSP-3 has been
listing.
setup as desired and the configuration saved to the DSP-3,
Physically, the DSP-3 is a small module that “piggybacks”
onto the back panel of the specified QSC amplifiers. It connects
directly to the DataPort on the back panel and is secured with
supplied hardware. When used with other amplifiers, the DSP-
connection to the PC is no longer required. This feature allows
essentially tamper-proof amplifier DSP setup. Further changes
can be implemented in the field by simply connecting a PC (i.e.
laptop computer) and loading the new setup into the DSP-3.
Note: Powerlight 6.0 and Powerlight 9.0 amplifiers require that pin #9 be removed from the remote
mounting interconnect cable. Amplifier damage may result from use of cable that has pin #9 connections present.
Normal VGA computer monitor cables have pin #9 removed and are usable. Check before use!
5
Section 1: Introduction- DSP-3 General Use Guidelines
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 variations and configurations. Because of the infinite configuration possibilities of digital signal processing and the DSP-3,
it is possible to create configurations that may result in
unwanted signals or uncontrollable output
Signal Manager has no way of knowing if the DSP configuration you have designed will produce the results you intend
to produce. You can create signal loops in your configuration
that may oscillate and you may damage your sound system
if you apply such configurations to the DSP-3. When applying
an untested configuration or when designing or experimenting with the DSP-3, it is a very good idea to turn down the
amplifier’s physical gain controls. That way, you won’t
damage your speakers or create very loud sounds if you apply
a configuration that doesn’t do what you thought it would.
As a general rule, DO NOT CREATE SIGNAL LOOPS! Do not
mix the output of a DSP object back into its own input! There
is nothing useful to achieve by doing that, you will only create
an oscillator that could damage you speakers. Also, USE THE
SINE AND NOISE GENERATOR OBJECTS WITH GREAT CAUTION! These objects produce signals that can harm your
speakers. Turn down the gain. If you don’t hear a signal when
you think you should, DO NOT INCREASE THE GAIN!!! If the
signal isn’t audible at lower levels, there is something else
wrong. Turning up the gain to full exposes you and your
system to the possibility that some loose connection somewhere will suddenly send a full-amplitude signal through
your sound system.
Like all freely configurable signal processing tools, the DSP3 will do what the configuration you design tells it to do,
which may not be what you expect it to do, so use caution.
6
Section 1: Introduction- Quick Start
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 the software help file.
This is the same material covered in the Signal Manager software help file, only presented on paper so that you
may “get right to it”.
1
2
TURN THE EQUIPMENT OFF & INSTALL THE HARDWARE
If you are using the DSP-3 with.......
Then you need to.....
QSC Powerlight2, CX, DCA 2-channel, 2-RU amplifiers (or later direct-mount applications)
Mount the DSP-3 to the amplifier by plugging it into the amp’s DataPort and
securing it with the supplied hardware. External power may be required for
older models (see Appendix).
QSC 4-channel CX & DCA amplifiers (or later
models with full-featured DataPort that do not
support direct mounting of the DSP-3)
Mount the DSP-3 remotely and connect a QSC DataPort cable between the
amplifier’s DataPort and the DSP-3’s “backside” DataPort. External power
may be required for older models (see top of page 2).
QSC Powerlight 6.0 or Powerlight 9.0
Mount the DSP-3 remotely and connect a MODIFIED QSC DataPort cable
(male-to-female cable with pin #9 removed) between the amplifier’s DataPort
and the DSP-3’s “backside” DataPort. Connect the external power supply to
the DSP-3’s EXTERNAL POWER jack.
QSC Powerlight, all except 6.0 & 9.0
Mount the DSP-3 remotely and connect a QSC DataPort cable (male-tofemale) between the amplifier’s DataPort and the DSP-3’s “backside” DataPort.
Connect the external power supply to the DSP-3’s EXTERNAL POWER jack.
a non-DataPort amplifier (QSC USA, PLX or nonQSC models
Mount the DSP-3 remotely. Connect the DSP-3’s CHANNEL 1 OUTPUT and
CHANNEL 2 OUTPUT to the appropriate amplifier inputs (see p.18 for
pinouts). Connect the external power supply to the DSP-3’s EXTERNAL
POWER jack.
CONNECT THE COMPUTER TO THE DSP-3
Use a 9-pin serial data cable to connect the DSP-3’s RS-232 connector to the computer’s available COM port (the 9-pin serial port
connector on the back of the PC). COM1 through COM16 are usable with the Signal Manager software. COM1 is the default port
in Signal Manager; use COM1 for your connection if it is available. If not, you will need to select the appropriate COM port in the
Signal Manager program after you install it in step 5.
7
Section 1: Introduction- Quick Start
3
4
CONNECT THE AUDIO INPUTS
If your using.......
Then you need to......
the CHANNEL 1 INPUT & CHANNEL 2 INPUT connectors
connect your input signal source to terminal block connectors
(refer to page 18) and plug the connectors into the CHANNEL 1 INPUT and CHANNEL 2 INPUT receptacles.
the DataPort input (QSC CM16a or related products)
connect the DataPort output from the CM16a (or other
related DataPort product) to the DataPort input of the DSP3. Use a QSC DataPort cable (male-to-male) for this connection. Refer to page 19.
TURN THE AMP GAIN DOWN, POWER UP THE AMPLIFIER & THE DSP-3
If the DSP-3 requires power from the accessory external power supply, apply
power to the DSP-3 FIRST, then turn on the amplifier. The power supply must be
plugged into an operational AC power receptacle. Then plug the “barrel” connector
(coaxial power plug) fully into the EXTERNAL POWER receptacle on the DSP-3. When
power is properly applied to the DSP-3, the blue POWER LED will be illuminated. Use
a plastic wire-tie (tie-wrap) to secure the accessory power supply’s cord to the DSP-3’s
chassis; there is a metal tab on the chassis for this purpose.
If the DSP-3 is powered by the amplifier’s DataPort, the amplifier must be
connected to an operational AC power receptacle. Then turn the amplifier “on” using
its power switch. The blue POWER LED on the DSP-3 will illuminate a few seconds
after the amplifier’s power switch is activated. If the DSP-3’s blue POWER LED does
not illuminate, you may have an older QSC DataPort equipped amplifier that requires
use of the accessory external power supply (refer to the Appendix for complete
application information).
8
Section 1: Introduction- Quick Start
5
INSTALL THE SOFTWARE
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 for your system) and follow the instructions displayed.
3. When the installation is complete, you will be presented with a screen that prompts you to view the “Readme” file. Please take
time to read this- it contains important up-to-date information on the software.
4. After installation, you will have an icon on your computer’s “desk top” labeled Signal Manager. Use this icon to start the
application (double-click on the Signal Manager icon, this will start the program).
5. Using the Menu Bar (see below) at the top of the window, choose the “Help” item and read the software help section. The help
system includes the contents of this hardware manual for “paperless” reference.
6. IMPORTANT! The DSP-3 is shipped with all of its presets configured to pass full-range audio signals through both channels.
THIS MAY NOT BE APPROPRIATE FOR YOUR SETUP! Be sure to configure any necessary crossovers , filters, etc. prior
to applying audio signals to the inputs. Damage to equipment may result if these recommendations are not followed.
WHAT THE SIGNAL MANAGER APPLICATION LOOKS LIKE
This screen-shot is what a typical Signal Manager “configuration” looks like (example only):
MAIN PALETTE
MENU BAR
TITLE
BAR
DRAWING TOOLS PALETTE
FILTERS PALETTE
DSP TOOLS PALETTE
MISC PROCESSORS PALETTE
INPUTS AND OUTPUTS PALETTE
WORKSPACE
PANE
FILE VIEW PANE
CURSOR POSITION PANE
NUM LOCK INDICATOR
STATUS BAR
SPLITTER BAR
RESOURCE METER
PANES
CAPS LOCK INDICTAOR
CONFIGURATION STATUS
PANE
COMMUNICATION STATUS PANE
9
Section 1: Introduction- Quick Start
6
ESTABLISH COMMUNICATION BETWEEN THE DSP-3 & THE COMPUTER
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.....
Then you need to......
ONLINE
Do nothing! Your communication settings match the COM port
you connected the DSP-3 to.
OFFLINE
Select Tools from the Menu Bar, select Options; the Options
dialog box will open. Click on the DSP tab. In the Serial Port
Selection field, click on the “down arrow” next to the port
selection data window. A drop down list of COM1 through
COM16 will appear. Select the COM port number that corresponds to the COM port of your computer that the DSP-3 is
connected to. Click OK (at the bottom of the dialog box); the
dialog will close. Exit Signal Manager and restart it so that
the newly selected COM port will become active. The
Communication Status pane should now indicate ONLINE if
everything was connected and set up properly.
7
ENSURE THE AMPLIFIER IS TURNED DOWN AND THAT YOU HAVE SUITABLE
SPEAKERS CONNECTED FOR YOUR INTENDED CONFIGURATION
For familiarization with the DSP-3 and the Signal Manager software, we recommend that you use a pair of full range
speakers connected to your amplifier and that the amplifier gain be reduced to the minimum useful setting. This will
allow you to configure the DSP-3 almost anyway you desire while providing audio output to verify that the DSP-3 is
doing as you intend. Small, high-power rated monitor speakers are perfect for the task.
Better safe than sorry! Don’t turn you amp all the way up; if communications between the computer and DSP-3 fail for any reason, unexpected
output transients could damage your speakers
8
CREATE A SIMPLE DSP CONFIGURATION
From the Menu Bar, select Configuration, New. If there was a default configuration on the Workspace, you will be prompted to close
the “current” configuration first.
Locate the Inputs and Outputs palette; left-click on the icon labeled IN1. Move your pointer into the upper left area of the Workspace
and left-click the mouse again. The IN1 object should now be on your workspace.
10
Section 1: Introduction- Quick Start
Now select the OUT1 icon from the same palette (left click on the OUT1 icon). Move your pointer into the upper right area of the
workspace, in line with the IN1 object you just placed, and left click again. The OUT1 object should appear.
Select the GAIN icon in the MISC PROCESSORS palette (it looks like a little wedge and is the left-most icon in this palette). Move your
pointer to the workspace in between (and in line with) the IN1 and OUT1 objects; click the mouse button again. The GAIN object should
appear.
Go to the DRAWING TOOLS palette and select the DRAW (pencil) icon. Notice that the IN1 object has a small yellow-colored “node”
on its right side. This is its connection node or the point that “wires” are drawn from. Similarly, note the same yellow-colored nodes on the
GAIN and OUT1 objects. Draw a “wire” from the IN1 object to the left side of the GAIN object. Draw another “wire” from the GAIN object
(right side) to the OUT1 object.
The DRAW tool works by clicking on one of the nodes that you want to draw a wire between, then, while holding down the
mouse button, dragging the wire to the other node. You can change the drawing mode from click-drag-release wiring to
click-click wiring in the Tools, Options dialog box; select the Drawing tab and make any desired drawing “behavior” changes.
When everything is placed on the workspace and connected with “wires”, go to the Menu Bar and select Configuration, then Apply
to DSP (or just click on the “Apply to DSP” icon in the DSP Tools palette). This will send your configuration (and any object parameter settings)
from the computer to the DSP-3. The DSP-3’s outputs will be muted while the configuration is loaded. For complex configurations, this could
take several seconds.
If you have active audio inputs connected to the DSP-3 and the amplifier’s gain is sufficient, you will probably hear your audio material
at this point. If not, double-click on each of the GAIN objects and increase the gain setting as required. Also in the Tools, Options dialog,
the DSP tab has settings for input and output sensitivity for the DSP-3; these may require adjustment dependant on your particular set up.
The Communication Status pane should indicate “ONLINE” and the Configuration Status pane should indicate “ACTIVE”. If you get
an error message when applying the configuration to the DSP-3 (i.e. “Failed to connect to DSP-3”) check the cable connection between the
DSP-3 and the computer’s COM port. Ensure that the correct COM port is selected in Signal Manager’s Tools, Options, DSP settings dialog
box.
Repeat the above procedure, this time using IN2, OUT2 and a GAIN object. This will give you a signal path with gain adjustment for
channel 2. Be sure to “Apply to DSP”. This sends your updated configuration from your computer to the DSP-3.
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 configuration, you will need to “unlock” the configuration after opening it. Just select
Configuration from the Menu Bar, then select Edit. The palettes that were “grayed out” will now appear in their normal,
colored state and you will be able to edit the configuration. After your editing is complete, select Configuration from the Menu
Bar and then Apply to DSP.
That’s it for the “Quick Start”. For more information, review this manual and the software’s help file.
11
Section 1: Introduction- Basic Connector & Indicator Descriptions
FRONT PANEL
CH 1 INPUT, CH 2 INPUT- These terminal-block
CH 1 OUTPUT, CH2 OUTPUT-- These terminal-
jacks (receptacles) are where you connect the
block jacks provides post-DSP (processed) signal
line-level audio inputs to the DSP-3.
from the DSP-3 for downstream devices (ampli-
They are electronically balanced with an input
impedance of 8.3k Ohm. If used in an unbalanced
configuration, the input impedance is 3.7k Ohms.
fiers, monitoring busses, daisy-chaining the processed signal to a second amplifier). In the case
of non-DataPort amplifiers, these are the DSP-3
output that gets connected to your amplifier’s
input connector.
SIGNAL indicator- This green
LED illuminates when the
DSP-3 detects an input signal
on either channel. Dual brightness levels indicate signal
level. At -40dB, it will light
dimly; at -20dB it will light
brightly.
EXTERNAL POWER2.5mm barrel connectorCenter (+), Outer(-), 15
VDC, 300mA. Use only if
your amplifier does not
supply the required operating voltage from its
DataPort
DATAPORT- This is the “in-
(or
non-
DataPort amps).
put” DataPort. If the DSP-3 is
used with QSC DataPort products that can supply the audio
inputs or provide amplifier control & monitoring, this is where
they are connected to the DSP3.
RS-232- This DB-9 female jack is where the
serial cable between the
POWER indicator- This blue
LED illuminates when the DSP3 has power properly applied.
12
DSP-3 and the computer
is plugged in.
Section 1: Introduction- Basic Connector & Indicator Descriptions
REAR PANEL
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 amplifiers, the DSP-3 will need to be remotely mounted
and a male-female DataPort cable used to interconnect the amp & DSP-3.
If used with a non-DataPort amp (QSC or other),
this connector will not be used.
OVERALL
13
Section 1: Introduction- List of Functions & Features
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 curve provided in software
Adjustable frequency & slope
Ability to bypass all EQ with a single mouse click
Ability to add or delete EQ
Assignable anywhere in signal chain
High- and Low-Pass Shelf Filter
Adjustable corner frequency
Adjustable Q factor
Adjustable gain
Graphical response curve provided in software
Ability to bypass all EQ with a single mouse click
Ability to add or delete EQ
Assignable anywhere in signal chain
Output Peak Limiter
Adjustable threshold
Adjustable attack time
Adjustable release time
Graphical response curve provided in software
Ability to quickly bypass limiter with a single mouse click
Assignable anywhere in signal chain
Multiple Delays
910 millisecond maximum ( sum of all delay objects)
20.83 microsecond increments
Entry can be in seconds, feet or meters
Assignable anywhere in signal chain.
14
Section 1: Introduction- List of Functions & Features
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
Adjustable Gain
Adjustable threshold
Adjustable compression ratio
Graphical response curve provided in software
Assignable anywhere in the signal chain
Signal Level Meter
Peak or rms response
Signal Attenuation (mute or bypass)
Mix Post Crossover Audio (2 to 1 mixer with mute and lock all channels featured)
Signal Splitter
External Contact Closure Sensing (pin #9 of RS-232, operates with ”Switched Gain” objects in Signal Manager software)
Pink & White Noise Generator
Variable Frequency Tone Generator
Clip & Protect Indication
Signal Polarity Reversal
15
Section 1: Introduction- Block Diagram
16
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
to non-QSC amplifiers (or any amplifier that does not have a
balanced 3-pin ‘euro’ terminal block jack and an electronically
DataPort). External power is provided by the accessory power
balanced DataPort input. The inputs are protected with a filter that
supply (“wall wart”) via a coaxial power cord jack on the back of the
prevents radio frequency interference. The inputs have software-
DSP-3.
selectable full scale input level sensitivity; this is the level at which
the analog to digital converters reach their full scale digital value.
Refer to the Specifications section for full details. The DataPort is
scaled to clip with a full scale digital input if the DSP-3 does not
change gain structure. Each CODEC input is diode protected to
prevent any large signal from destroying its inputs.
When using the external power source, we recommend
that the DSP-3 be powered-up before the amplifier in order
to insure trouble-free start-up. This will also avoid the
possibility of “thumps & bumps” should the DSP-3 be powered up after the amplifier.
Audio Output Path
Data Acquisition
The first stage the audio passes through is an inverting gain stage.
The second stage is a second order Butterworth low pass filter that
removes high frequency sampling artifacts. The signal is then sent
out of the DSP-3 through the DataPort or the output ‘Euro’ connectors. The output level is selectable in software.
The DSP-3 samples the IMON and VMON (current and voltage monitoring from the amplifier) lines of QSC amplifiers (via the DataPort) in
order to perform dynamics (limiter, compressor, etc.) processing.
The four inputs (IMON and VMON for both channels) are continuously
sampled by a four channel ADC. When used with non-QSC
Power Supply
amplifiers or QSC amplifiers that have no DataPort, the
No external power supply is needed for use with the CX, DCA and
power limiter DSP “object” is not available as this function
PL2 two-channel, 2 RU series amplifiers produced with date-codes
relies upon amplifier current and voltage feedback. The
of August, 1999 or later. With these models, the DSP-3 is supplied
DSP-3 will also not be able to monitor the protect or power status
power from the amplifier via the DataPort (HD-15) connection. CX,
of the amplifier as these features require amplifier data via a
DCA, and PL2 amps made prior to August 1999 DO NOT
DataPort connection.
provide adequate power supply voltage to the module,
Contact Closure
requiring the use of the same type of external DC supply as
used with Powerlight amplifiers. The amps in question will have a
serial number PRIOR to 0899XXXXX, where the first four digits of
the serial number are the MMYY datecode. Again, the modules
WILL work with these amps just fine, but will require the use of our
external power supply. External power is not required for all other
directly-mounted-to-amplifier situations.
One contact closure input is provided. It uses pin 9 of the RS-232
DB-9 connector (not normally used for RS-232). Shorting this pin to
ground with a maximum impedance of 1.3 kOhms will cause a
general purpose I/O pin of the DSP to be pulled to a logic low. The
current release of Signal Manager software uses this input to allow
switched gain functions. Each of the Switched Gain blocks will be
switched simultaneously by the single contact closure (switch).
When used with the Powerlight series of amplifiers (or 3 RU & 4channel amps), the DSP-3 requires use of the accessory external
Each Switched Gain block has a two gain settings; one for open and
one for closed switch conditions.
supply. The accessory external supply is also used when connecting
17
Section 2: Installation- Unpacking 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).
WHAT IS INCLUDED IN THE CARTON:
Item
123456-
Description
DSP-3 Digital Signal Processor
3-pin terminal block connector plug
#4-40 machine screw, 1.125” long
#8-32 machine screw, 0.312” long
Hardware Manual (this document)
Signal Manager Software CD disk
Quantity
1
4
2
1
1
1
DIRECT MOUNTING THE DSP-3 TO 2-CHANNEL, 2 RU QSC DATAPORT EQUIPPED AMPLIFIERS (CX, DCA, Powerlight2)
The DSP-3 mounts directly to the rear of 2-channel, 2-RU, DataPort equipped QSC amplifiers.
1- Configure the amplifiers DIP switches (QSC amplifiers where the DSP-3 covers the configuration switches) as follows:
•All filters off
•Clip limiter off
•Mode set as required
2- Align the DataPort plug on the back of the DSP-3 with the DataPort jack on the back of the amplifier and gently push the DSP-3 to seat
the connector.
3- Install the two #4-40 screws to secure the left side of the DSP-3 to the amplifier. These two long screws pass through the DSP-3 and
thread into the inserts on the DataPort (HD15) jack. (see below). Use a #1-size phillips driver; be sure not to overtighten.
Be sure to secure the DSP-3 using all three mounting screws. The DSP-3’s “backside” DataPort connector can be
easily damaged if the DSP-3 is twisted and there are no supporting screws to properly secure it to the chassis.
4- Install the #8-32 screw (0.312 inch long) to secure the right side of the DSP-3 to the amplifier (see below).
18
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. nonQSC amplifiers) some of the dynamic processing capabilities of the DSP-3 will not be available.
Accessory Remote Mounting Bracket- This accessory is a 19”, 2-RU panel with mounting facilities for up to four DSP-3 modules. It is
intended to be mounted to the rear-support rails of an equipment rack. The bracket kit comes with one large bracket ( the 19”, 2-RU size)
and four smaller right-angle brackets that are used for securely mounting up to four DSP-3’s in a 2-RU space. Adjustable rack ears are
included for maximum mounting flexibility.
1- Attach the right-angle bracket to the DSP-3 module. The right-angle bracket is attached as shown, below.
2- Attach the DSP-3 & right-angle bracket to the main 19” bracket as shown, below.
3- Mount the main bracket assembly in your equipment rack
between the rear support rails.
4- Attach the inputs, outputs, DataPorts,
RS-232 and external power as required.
19
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 prewiring of inputs without any soldering and allow for rerouting of audio inputs by simply interchanging connector locations without the need
for any tools. See Appendix for connector manufacturer’s part number reference.
Inputs- The audio input can be from one of two sources; the front-panel DataPort OR the terminal-block
INPUT connectors.
Do not use both sets of inputs at the same time! Use balanced connections
for the lowest possible noise levels and for minimizing the possibility of hum inducing ground loops.
Outputs- The DSP-3’s post-DSP (processed) audio is output to the rear-panel DataPort AND the terminalblock OUTPUT connectors.
The OUTPUT’s can be used for daisy-chaining the processed audio to
additional amplifiers, even when connected to a DataPort-equipped amplifier via the rear-panel DataPort.
Balanced connection is recommended for all inputs.
Unbalanced inputs can be used if required. If unbal-
The terminal block inputs on the DSP-3 are electronically
anced audio sources are used, it is preferable to use an
balanced. Balanced input cables are recommended to mini-
appropriate audio transformer (or other unbalanced-to-bal-
mize noise pick up and prevent ground loops.
anced “converter”) to provide a balanced input to the DSP-3.
With the connector oriented as shown at the right, connect the
positive (+) signal wire to the left-most
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.
To connect your signal wire to the terminal-block plug- back the screws out
a few turns to open the wire-clamp, carefully insert the conductors into the proper
location, and retighten the clamping screw.
The recommended stripping length for the wires is approximately 6 to 8
mm ( 1/4 to 5/16 inch). When stripping the audio cable, be careful not to nick or
cut the conductor strands. After each conductor has been stripped and dressed,
insert it fully into the connector and tighten the retaining screw. When stranded
wire is used, carefully twist the conductor strands together so that when they are
inserted into the connector assembly, no loose strands short adjacent terminals.
20
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 input may be via the terminal-block connectors.
The front-panel DataPort connection is used for connecting to
QSC DataPort products. Use a QSC DataPort cable (male-to-
male) similar to VGA computer monitor cables. Do not use computer VGA cables as they are not correctly constructed for
use with the DSP-3. QSC DataPort cables may be obtained
through your QSC distributor or by calling QSC’s Technical Services
Department. The plugs and jacks are the same physical size as the
RS-232 connections; be careful not to get them confused.
The rear-panel DataPort connection from the DSP-3 to QSC
DataPort Connection: 15-pin Cable
amplifiers is made when mounting the DSP-3 to the rear of the
amplifier. The DataPort connection from any other accessory to the
DSP-3 is made by orienting the connector properly, inserting it fully
into the jack and finger-tightening the retaining screws. The audio
signals on the rear-panel DataPort are post-DSP (processed).
Front panel DataPort connection is not required for the operation
of the DSP-3.
RS-232 PORT Connection- Connection to the RS-232 port is made
using a 9-pin serial data cable (male-to-female). Cable length should be 25
feet or less. Orient the DB-9 plug correctly, insert the plug fully into the RS232 port and finger-tighten the retaining screws.
DSP-3 setup and programming takes place through the RS-232 port. Any
time setup changes are required to the DSP-3, it must be connected to its
host computer through the RS-232 port. If “real-time” control of the DSP3 is required, the RS-232 port connection must be maintained as well. If
“real-time” control is not required, then the DSP-3 can be setup first and
then disconnected from the PC.
The RS-232 connection does not have to be maintained for the
RS-232 Connection: 9-pin Cable
DSP-3 to operate.
Setup & programming can also be done via Ethernet network
communication when using QSC’s QSControl products. Refer to
QSControl documentation for detailed information.
21
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. The terminal block outputs are active even when the DataPort connections are used.
To daisy-chain the DSP output, connect the output jacks of the DSP-3 to the input jacks of the next amplifier. Make sure that
all interconnecting cables are balanced and connected properly.
CONNECTION TO ACCESSORY EXTERNAL DC
POWER SOURCE
When the DSP-3 is used with QSC Powerlight amplifiers
that do not provide the required +15VDC through their
DataPort connection OR is used with non-DataPort amplifiers, power must be supplied to the DSP-3 from an external
power supply.
QSC offers an accessory external power supply for applica-
QSC offers an accessory external power supply for applications with non-QSC amplifiers or with QSC Powerlight models
that do not provide the required operating voltage.
tions where a DataPort that provides +15 VDC is not
available. Contact QSC’s Technical Services Department
for details. Although not recommended, third-party external power supplies may work with the DSP-3 provided
they are of the correct voltage, voltage type (DC) , current
rating and polarity. Any damage to the DSP-3 caused by
connection to a non-QSC external power supply is not
covered under the warranty.
Ensure that any external power supply connected to
the DSP-3 is of the proper voltage type, level and
current rating.
Be certain that the connector polarity is correct as
there is no industry standard!
Connection to an improper voltage source can cause
immediate damage to the DSP-3!
22
Insert the coaxial power plug into the EXTERNAL
POWER jack. Ensure that the plug is firmly seated in
the jack. Use the “tab” provided on the chassis for
securing the power cord with a tie-wrap (wire-tie).
Section 2: Installation- Application Examples
The following examples show basic hook up information that assumes a two-channel, full range audio signal driving the load. Refer to your
amplifier’s hardware manual for other output configurations. All audio signals are line level.
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.
NOTE: External accessory power supply may be required on older models, see page 2 for full application information.
23
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
NOTE: External accessory power supply may be required on older models, see Appendix for application information.
24
Section 2: Installation- Application Examples
DSP-3 Remotely Mounted connected to any Non-DataPort Amplifier.
Audio Input via Terminal Block Inputs
25
Section 3: Signal Manager Software- Software Installation
System Requirements- To use QSC Signal Manager, you need the following hardware and software:
• IBM compatible computer, 200 mHz or greater Pentium Processor
• Windows 98/2000 or Windows NT 4.0 with service pack 6a or later
• SVGA display at 800 x 600 minimum resolution, 1024 x 768 recommended
• CD-ROM drive
• 32 MB or more of RAM
• 10 MB of free hard disk space
• An available RS-232 serial communications port (COM port) capable of 38.4k baud
• A male-to-female 9-pin serial cable (to connect the DSP-3 to available COM port)
Software Installation1. 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. Run D:\Setup.exe (replace “D” with your CD drive’s designation if necessary) and follow the instructions displayed.
3. When the installation is complete, you will be presented with a screen that prompts you to view the “Readme” file. Please
take time to read this- it contains important information on how to use the software.
4. After installation, you will have an icon on your desk top labeled “Signal Manager”. Use this icon to start the application.
5. Using the main menu bar at the top of the window, choose the “Help” item and read the software help section. The help system includes
the most up-to-date information for “paperless” reference. Also, visit QSC on the internet at http:/www.qscaudio.com for DSP-3 updates.
6. IMPORTANT! The DSP-3 is shipped with all of its presets configured to pass full-range audio signals through both channels. THIS MAY
NOT BE APPROPRIATE FOR YOUR SETUP! Be sure to configure any necessary crossovers , filters, etc. prior to applying audio
signals to the inputs. Damage to equipment may result if these recommendations are not followed.
OVERALL NOTES AND WARNINGS• 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.
• Do not run your amplifier “wide open” (maximum gain) while making real-time adjustments to the DSP-3’s setup. The
nature of the communication path between the PC and DSP-3 is inherently more complex than direct physical controls of
an equivalent analog processing device. Unpredictable results may occur due to failure of the PC or the communications
channel. Under such circumstances, damage to your drivers is possible if the amplifier gain is set for high power levels.
Use the minimum useful gain settings while making system adjustments.
26
Section 3: Specifications
Signal Processing 24 bit, 48 kHz.
Common-mode rejection
>50 dB, 20 Hz–20 kHz
Frequency response
at 3dB below full
scale input voltage
20 Hz–10 kHz ±0.3 dB (term. block inputs)
20 Hz–20 kHz ±0.7 dB (term. block inputs)
20 Hz–20 kHz±0.2 dB (DataPort inputs)
Crosstalk
>75 dB separation, 20 Hz–20 kHz
Distortion
<0.01% THD+N @ +4 dBu out
Delay (throughput)
687.5 microseconds
Dynamic range
>93 dB unweighted
20 Hz–20 kHz, 1.5V, 4V and 9V sensitivity
>88dB unweighted
20 Hz–20kHz, 18V sensitivity
Polarity
In-phase or inverted
Mute
>90 dB attenuation
Inputs
Program inputs
Connector type
Type
Grounding
Input sensitivity
(full scale input level)
Impedance
2
“Phoenix-style” (a.k.a.
“Euro-style”) detachable terminal blocks
Electronically balanced
All shield terminals connected to
chassis
1.5, 4.0, 9.0 or 13.0 Vrms
6, 14.5, 21.5 or 24.5 dBu
3.5, 12.0, 19.0 or 22.2 dBv
Units are selectable in software interface
Outputs
Program outputs
Connector type
Pinout
Cable type
Qualified length
2 (via HD-15)
HD-15 DataPort connection
Special, see appendix
QSC DataPort cable
2 meters
Daisy-chain output
Connector
2 (1 per channel)
“Phoenix-style” (a.k.a.
“Euro-style”) detachable
terminal blocks
Type
Grounding
Electronically balanced
Shield terminal connected to
chassis
Output level
(full scale)
6.0 or 4.0 Vrms
18.0 or 14.5 dBu
15.5 or 12.0 dBv
Output impedance
600 Ohms balanced
8.3 K Ohm balanced
3.7 K Ohm unbalanced
Power amplifier connectivity
Power amplifier interface
Compatibility
all QSC and non- QSC amplifiers
Full-feature set
all QSC DataPort equipped amplifiers
Connector and cable
HD-15 VGA cable, 2 meters length
qualified (for longer runs, contact
QSC’s Technical Services Department)
Amplifiers
one 2-Ch. amplifier per DSP-3
Amplifier status monitor
Clip indicator
Senses channel clipping
Protect indicator
Senses amplifier protect status
(status monitoring not available for non-DataPort amplifiers)
RS-232 Port
Cable Type
9-pin serial cable, male-to-female
Maximum Length
25 feet (7.6 meters)
Contact closure input (sense)
Inputs
1 discrete input (pin #9 of RS-232 port)
Configuration
Single-ended input
Resistance for closure detect <150 Ohms
Resistance for open detect >1.9 K Ohms
TTL Compatible
Maximum Voltage= +9vdc
Note: Specifications are subject to change without notice.
27
Section 3: Specifications
General
Physical
Height
Width
Depth
3.50 inches
3.75 inches
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 milliamperes
Output Termination Detachable power cord with 2.5mm
barrel-type (coaxial) connector
center pin is positive
Note: Specifications are subject to change without notice.
Dimensions
28
Section 4:
Architect’s and Engineer’s Specifications
The Digital Signal Processor (DSP) shall provide two independent
Contact Closure I/O—The DSP shall provide a trigger input
channels of DSP for signal delivery to QSC DataPort equipped
usable for contact-closure (or other) purpose which shall
power amplifiers. The processing shall be distributed with the DSP
be CMOS & TTL signal compatible.
module mounted directly to the rear of the power amplifiers.
Power Supply—The DSP shall be provided power through its
Output Peak Limiter—For each audio channel, the DSP shall
DataPort connection to QSC amplifiers. For older ampli-
provide a peak limiter that is assignable anywhere in the
fiers or non-QSC amplifiers, a coaxial power jack will be
signal chain and can be switched on or off. The limiter shall
provided on the DSP for connection to an external power
provide the following adjustments:
source. Power required shall be +15 VDC at 300 mA
Gain
Threshold
Attack time
Release time
(max.).
Amplifier Interface—The DSP shall attach directly to the rear of
each power amplifier. The DSP’s interface to each power
amplifier Data Port shall be via an HD-15 connector. This
interface shall transmit two amplifier input audio signals
High- and Low-Pass Crossovers—For each channel of audio,
as well as all control and monitoring signals. Special
the DSP will provide high-pass and low-pass crossovers
signal conditioning and grounding techniques shall be
that are assignable anywhere in the audio chain. The
used in this interface to ensure negligible levels of noise
crossovers must be capable of being switched in or out
and crosstalk. For non-DataPort amplifiers, there shall be
of the signal chain. The DSP shall provide the following
mounting and interface options provided for operating
crossover responses:
with the DSP.
Butterworth (6,12,18,24 dB per octave slope)
Amplifier Output Monitoring—When used with QSC DataPort
Bessel (6,12,18,24 dB per octave slope)
amplifiers, the DSP shall provide clipping and protect
Linkwitz-Riley (12 & 24 dB per octave slope)
status detection at the amplifier’s output terminals.
High- and Low-Pass Shelf Filters—For each audio channel, the
Noise & Tone Generation-- The DSP shall provide pink and
DSP shall provide high-pass and low-pass shelf filters
white noise generation capability. It shall also provide for
that are assignable anywhere in the audio chain. The
tone generation.
shelf filters must be capable of being switched in or out
Presets— The DSP shall be capable of storing at least 8 preset
of the signal chain. The DSP shall provide the following
configurations. The control software shall provide man-
shelf filter adjustments:
agement of these presets.
Variable corner frequency
Variable gain
Variable slope
General—All audio inputs and outputs shall be balanced with a
nominal input level of +4 dBu and maximum level of +21
dBu. Input connectors shall be of the “Phoenix” detachable terminal block type.
Compressor-- The DSP shall provide a signal compressor that is
assignable anywhere in the signal chain. It shall have adjustable
threshold, attack time, release time, and compression ratio.
Control— The DSP shall be configurable via RS-232 or via a
networked DataPort connection.
The Digital Signal Processor shall be the QSC DSP-3.
29
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.
Pin
Signal Description
1
Ch. 1 Minus (-) Input Signal
2
AC Standby Control
tice as the DataPort feature is specific to
3
V- MON Ch. 1 and Subcode 1
QSC products and not intended for inter-
4
I- MON Ch. 1 and Subcode 2
5
Clip/Protect Ch. 1
6
Hard Ground
7
Ch. 1 Plus (+) Input Signal
8
Ch. 2 Plus (+) Input Signal
9
+15V from Amplifier
10
Data Reference Ground
11
Ch. 2 Minus (-) Input Signal
12
Amplifier IDR (Model ID)
13
V- MON Ch. 2 and Subcode 3
14
I- MON Ch. 2 and Subcode 4
15
Clip/Protect Ch. 2
NOTE!
This information is shown for reference
only and is subject to change without no-
face to other manufacturer’s equipment.
Note: Powerlight 6.0 and Powerlight 9.0 amplifiers
require that pin #9 be removed from the remote mounting
interconnect cable.
Amplifier damage may result from use of cable that has pin
#9 connections present.
30
Description of Encode Signals
encode 1
Bridge mode & power detect
encode 2
Temperature, channel 1
encode 3
encode 4
Standby mode detect
Temperature, channel 2
Section 5: Appendix- RS-232 Port Pinout & Connector P-N’s
RS-232 PINOUT: The diagram below shows the pin assignments for the RS-232 connector on the DSP-3.
Note that Pin #9 is used for Contact Closure function (normally not used in RS-232).
Pin
1
2
3
4
5
6
7
8
9
Signal Description
DCD
TD
RD
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.
3 pin without integral strain relief: Phoenix Contact - 17 57 02 2; Riacon - 31249103-6; On Shore Tech - EDZ950/3
3 pin WITH Strain Relief : Phoenix Contact 17 76 16 8
“Phoenix Contact” is the trademark of Phoenix Contact, Inc., Middletown, PA
“Riacon” is the trademark of RIA electronic, Inc., Eatontown, NJ
“On-Shore Technology” is the trademark of On-Shore Technology, Inc., Tempe, AZ
All other trademarks are the property of their respective owners
31
Section 5: Appendix- Application Information
APPLICATION INFORMATION
As design improvements are continuous, the following information is subject to change. Contact QSC for current information.
QSC’s DSP-3 Module has been designed to attach directly to the DataPort connector of QSC’s CX, DCA, Powerlight, and Powerlight
2 series amplifiers. When attached to CX, DCA, and Powerlight 2 amps manufactured 08/99 and later, the module receives its
power through the DataPort from the amplifier. Modules connected to earlier models of those just mentioned and all Powerlight
amplifiers (the “non-2’s”) require an external DC supply (available from QSC).
TO CLARIFY- CX, DCA, and PL2 amps made prior to August 1999 DO NOT provide adequate power supply voltage to
the module, requiring the use of the same type of external DC supply as used with Powerlight amplifiers. The amps in
question will have a serial number PRIOR to 0899XXXXX, where the first four digits of the serial number are the MMYY datecode.
Again, the modules WILL work with these amps just fine, but will require the use of our external power supply.
•Full feature set, Direct-mounting, No external power or special interconnect cables required for the following QSC
power amplifiers with serial numbers of 0899XXXXX and later, where the first four digits of the serial number are the MMYY datecode :
CX series:
DCA series:
PL2 series:
PL2A series:
CX302 - CX1202V (all)
DCA1222, DCA1622, DCA2422, DCA3022, DCA342
PL224, PL230, PL236, PL218
All
•Remote Mounting Required, QSC DataPort Cable required: Full feature-set, no external power required.
CX series:
DCA series:
CX204V, CX254, CX404
DCA1644, DCA1824
•Remote Mounting, QSC DataPort Cable and External Power required: Full feature-set.
Powerlight series:
PL1.0 through PL4.0 (all)
PL6.0 and PL9.0 require modified DataPort cable between DSP-3 and amplifier.
Powerlight 6.0 and 9.0 MUST have
pin #9 removed from the Amplifier-toDSP DataPort Cable before use!
•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.
32
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 the least, a copy of the DSP-3 configuration(s) should be saved to floppy disk, so the
configuration files can be transferred to whatever computer(s) might be used to adjust or modify the DSP-3
module settings in the future.
The reason:
The Signal Manager software works in conjunction with the DSP-3 module to
create specific signal processing algorithms for filters, delays, limiters, and the like. The algorithms are displayed on the
computer screen as ”configuration files”, with graphical representations of each function and parameters. The user creates a
signal chain, “wiring” together blocks of functions as needed for each particular audio channel or channels.
When you build a DSP-3 configuration from scratch, or load one from disk, and perform an “Apply to DSP” operation, the
information downloaded into the DSP-3 module is NOT the graphical representation of what is displayed on the screen. The
downloaded information consists of the compiled algorithm coefficients of the functions, i.e. “just the math”. If building a new
configuration from scratch, when you apply it to the DSP-3 you will also be prompted to save it to disk as a Configuration file.
The path for this Configuration file is then associated with the compiled information that is applied to the DSP-3. A previously
saved (to disk) configuration file may also be applied to the DSP-3, and that particular file path is associated with the algorithms
now loaded in the DSP-3.
When you connect a DSP-3 to a computer, the Signal Manager software first attempts to locate and display the configuration
file that has been associated with the algorithm coefficients currently running in the DSP-3, to correlate “what you hear” with
“what you see”. This would allow you to further adjust a delay or a filter parameter, for instance. If the correct file is located,
based on the associated path name, the graphical configuration is displayed. If the file is not found (the file has been renamed,
moved, deleted, or you are not using the same computer on which the DSP-3 was originally configured) the computer will display
a message asking if you would like to load the Default configuration.
Answering YES will load the Default (factory) configuration TO THE SCREEN, but will not apply it to the DSP-3. Answering NO
will merely display a blank workspace to the screen with no configuration loaded. At this point, what is displayed is NOT what
is currently running in the DSP-3 memory.
IF YOU PERFORM AN “APPLY TO DSP” NOW YOU WILL OVERWRITE WHATEVER IS CURRENTLY RUNNING IN THE DSP-3! This
is likely NOT what you want to do. Instead, locate the desired configuration file (from an alternate path or from floppy) using
the Configuration->Open menu (Ctrl-O).
When the proper configuration file is displayed on the screen, go to the Configuration->Edit menu (Ctrl-E), followed by an Apply
to DSP command (Ctrl-D). This will download the currently displayed configuration back into the DSP-3 (overwriting itself),
allowing synchronization of what is displayed with what is running in the DSP-3. At this point, you may adjust parameters or
modify settings as usual.
QSC engineers are currently developing an improvement to this process, in which the computer would always be capable of
displaying the currently running configuration, regardless of the location of the configuration file (or lack of the file).
33
Section 6: Maintenance, Warranty & QSC Contact Information
Cleaning
Disclaimer
The faceplate and chassis can be cleaned with a soft cloth and
QSC Audio Products, Inc. is not liable for any damage to speakers,
nonabrasive, mild cleaning solution. Products like Simple Green
amplifiers, or any other equipment that is caused by negligence or
and Windex work well. Do not use powders or scrubbing pads of any
improper installation and/or use of the DSP-3 digital signal
type as they are usually abrasive and will permanently damage the
processor. Due to the inherent complexity of the communications
finish of your DSP-3. Dampen a soft, lint-free cloth with the
between the DSP-3 and the host computer, QSC Audio Products,
cleaning solution and wipe the DSP-3 down gently. Insure that
Inc. is not liable for any direct or indirect damage caused by
cleaning solution does not get down into the connectors. Do not
computer communications failure.
spray the solution directly onto the DSP-3 as it will penetrate into
Product Warranty
the connectors.
QSC Audio Products, Inc. (“QSC”) guarantees its products to be
User Maintenance
free from defective material and / or workmanship for a period of
There is no user-level maintenance on the DSP-3. Contact QSC’s
three (3) years from date of sale, and will replace defective parts
Technical Services Department if service is required.
and repair malfunctioning products under this warranty when the
defect occurs under normal installation and use - provided the unit
Warranty Information
is returned to our factory or one of our authorized service stations
If the DSP-3 isn’t working properly, please verify that a
known good 9-pin serial cable is used between the DSP-3
and the computer. If proper operation can not be restored,
the DSP-3 may require service. This must be performed by
qualified service personnel. To obtain the location of you
nearest QSC Authorized Service Center, please contact you
QSC dealer or contact QSC’s Technical Services Department.
via pre-paid transportation with a copy of proof of purchase (i.e.,
sales receipt). This warranty provides that the examination of the
return product must indicate, in our judgment, a manufacturing
defect. This warranty does not extend to any product which has
been subjected to misuse, neglect, accident, improper installation,
or where the date code has been removed or defaced. QSC shall
not be liable for incidental and/or consequential damages. This
warranty gives you specific legal rights, and you may also have
other rights which vary from state to state. This limited warranty
is freely transferable during the term of the warranty period.
WORLD WIDE WEB:
FACSIMILE (FAX) NUMBERS:
http://www.qscaudio.com
Sales & Marketing FAX
(714) 754-6174
Technical Services FAX
(714) 754-6173
TELEPHONE NUMBERS:
ADDRESS:
Main Number
QSC Audio Products, Inc.
(714) 754-6175
Sales Direct Line (714) 957-7100
or (800) 854-4079 toll free (U.S.A. only)
Technical Services (714) 957-7150
or (800) 772-2834 toll free (U.S.A. only)
34
1675 MacArthur Boulevard
Costa Mesa, CA 92626-1468 USA
1675 MacArthur Boulevard
Costa Mesa, California 92626 USA
PH: (714) 754-6175 FAX: (714) 754-6174
© Copyright 2001, 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
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