DSP-30
Computer Configurable Digital Signal Processor
Featuring intuitive PC system configuration combined with “set-and-
forget” convenience, the DSP-30 unites easy-to-use, customizable,
two channel digital signal processing (DSP) with a simple preset
selection interface that requires only two buttons. It can be used with
all amplifiers and is housed in a 1RU, 19" rack mount steel chassis.
Sampling frequency is 48 kHz with 24-bit resolution. Dynamic range
is greater than 95 dB. Rugged and dependable in the spirit of all QSC
professional audio products, the DSP-30 is well suited to a variety of
applications including mobile DJ, club PA, and pro touring.
Powerful
The DSP-30’s powerful processor enables a wide range of signal processing
functions. Whether you need speaker crossovers, EQ, signal delay, or
infrasonic filters, the DSP-30 is as flexible as your system’s needs.
Each channel includes:
• Crossover filtering
• Compression and limiting
• Multiple Parametric EQs
• Precision attenuation
• Shelf filtering
• Mixing
• Multiple Delays (up to 910 ms)
• Tone and noise generation
Configurable
The DSP-30’s processing horsepower is dynamically assignable, so you
are not limited by a fixed signal chain. Simply use QSC’s powerful PC-
based Signal Manager software to easily configure multiple processing
functions and signal flow with “drag-and-drop” tools. The DSP-30
provides eight fully configurable user presets, selectable from front-
panel switches.
Cost-effective
The power and flexibility of the DSP-30 eliminates the need for individual
outboard signal processors—reducing cost, space, and installation time
for almost any application. Housed in a 1RU, 19-inch rack-mount steel
chassis, it can be used with all audio systems.
DSP-30
Signal Processing Functions and Additional Features
Multiple Parametric Filters, assignable anywhere in the signal chain:
Variable Frequency Variable Q
Variable Gain Show Response
Multiple Delays, assignable anywhere in the signal chain:
20.83 µsec incremental
910 msec maximum (total of all delays)
Compressor, assignable anywhere in the signal chain:
Gain Release Time
Threshold Show Response
Ratio Bypass
Attack Time
Output Peak Limiter, assignable anywhere in the signal chain:
Gain Release Time
Threshold Show Response
Attack Time Bypass
High and Low-Pass Crossover Filters, assignable anywhere in the
signal chain:
Butterworth 6, 12, 18, 24 dB per octave slope
Bessel 6, 12, 18, 24 dB per octave slope
Linkwitz-Riley 12 and 24 dB per octave slope
High and Low-Pass Shelf Filters, assignable anywhere in the
signal chain:
Variable Corner Frequency Variable Q
Variable Gain Show Response
Signal Mute
Attenuation 0.1 dB steps
Mix Post Crossover Audio (2➞1 Mixer)
Signal Splitter
Built-in Noise Generator (Pink & White)
Built-in Variable Frequency Tone Generator
Signal Polarity Reversal
Frequency Response readout for each filter
RMS and Peak Metering with Clip Indication
Add or delete up to 7 additional bands of “EQ” per filter block
Visual editing of composite filter response, using cursor controls
in graphical display
Hardware
Two independent channels of DSP
48 kHz, 24-bit converters
No turn on pops or “zipper” noise
If the memory or hardware fails, unit turns on muted to prevent
driver damage
Easy PC connection with front panel RS-232
Balanced Neutrik® Combo (XLR and 1/4") inputs and XLR outputs
Power and signal present LEDs with signal level
Numeric display indicates current preset
Eight fully configurable user presets
Preset Browse and Accept buttons with lock-out feature
Selectable input sensitivity: 1.5, 4, 9, 18 Vrms; 6, 14.5, 21.5, 27.5
3.5, 12, 19, 25 dBV
Software
“Drag-and-drop” configuration software
Hard copy printout of configuration layout or parameter settings
DSP processing power and memory is dynamically assigned to signal
processing functions — eliminating the limitations imposed by fixed
signal chain designs
Graphical representation of DSP resources
Firmware upgrades via RS-232
Download the latest Signal Manager software at www.qscaudio.com
System Requirements
Windows® 98, NT4 (SP6), and 2000 (SP1)*
SVGA monitor at 800 x 600 (min.); 1024 x 768 recommended
CD-ROM drive
32 MB RAM (min.)
10 MB free hard disk space (min.)
Available RS-232 COM port
dBu;
Individual or group bypass of EQ bands per filter block
Predictive Delay Feature — produces less signal distortion than analog
compressor/limiters — especially for fast attack times
Male to female 9-pin serial cable (for programming)
* Windows Me not supported
Configurations
Signal Manager
Advanced “Drag and Drop” Software Configuration
DSP configuration is made simple with a PC-based “drag-and-
drop” software program called Signal Manager. Users access a DSP
“toolbox” and simple drawing tools to configure processing functions
and signal flow. DSP processing power and memory is dynamically
assigned to signal processing functions. Any combination of functions
may be configured until the total capacity is used. DSP resources are
graphically displayed at the bottom of the screen.
Configurations can be downloaded directly to the DSP-30 via an
RS-232 serial connection. The software package also offers real-time
control and set-and-forget convenience. Once saved, configurations
(presets) can be recalled via the DSP-30’s front panel switches-
without the need for a computer.
The DSP is configured with an easy-to-use software interface. Signal processing
icons from the toolbar are dropped onto the workspace and the signal path is
routed with simple drawing tools.
DSP-30
Audio Converters 24 bit, 48 kHz
Frequency Response 20 Hz – 20 kHz ± 0.4 dB at 1 dB below full scale input voltage (all sensitivities)
Distortion < 0.007% THD+N at 1 dB below full scale output (all sensitivities) 20 Hz – 20 kHz
Throughput Delay 1.00 milliseconds (A/D – DSP – D/A)
Dynamic Range (AES-17 -60 dB method) > 95 dB unweighted, 1.5V, 4V and 9V input sensitivities | > 93 dB unweighted, 18V input sensitivities
Polarity In-phase or inverted
Mute > 95 dB attenuation
Indicators Power: 1 blue LED | Channel 1 and Channel 2 signal level: 2 green LEDs | Preset Display: 7 segment LED
Input Sensitivity Volts dBU dBV
Full scale sine wave RMS before clipping. 1.5 6.0 3.5
Full scale output voltage 9.3 Vrms. 4 14.5 12.0
9 21.5 19.0
18 27.5 25.0
Audio Input Connectors
Program Inputs 2
Connector Balanced Neutrik Combo
Type Electronically balanced
Grounding All shield terminals connected to chassis
Input Impedance 8.3k ohm balanced, 3.7k ohm unbalanced
Commom Mode Rejection > 54 dB, 20 Hz – 20 kHz
Crosstalk (inter-channel within DataPort pair) > 78 dB separation, 20 Hz – 20 kHz
Audio Output Connectors
Program Outputs 2
Connector 3-pin male XLR receptacle
Type Electronically balanced
Grounding All shield terminals connected to chassis
Output Level Level and units are selectable in software interface
Maximum Output (full scale) 9.3 Vrms (+21.5 dBu), THD < 1.0%
Output Pad -6 dB
Output Impedance 600Ω balanced
Power Amplifier Interface - compatibility Works with all professional audio products
RS-232 Port
Port Type RS-232, female
Cable Type 9-pin serial cable, male-to-female (serial extension cable)
Maximum Length 25 feet (7.6 meters)
Contact Closure Inout
Inputs 1 discrete input (pin #9 of RS-232 port)
Configuration Single-ended input, pull LOW (to GND, pin5) for closure detect
Resistance for closure detect < 150Ω
Resistance for open detect TTL compatible > 1.9k ohms
thresholds with 9V DC max input
Physical
Chasis Steel (chassis and covers)
Dimensions (HWD) 1.73" (4.39 cm) x 18.9" (48.0 cm) including rack ears x 14.9" (37.8 cm) including rack ears / 13.7" (34.8 cm) excluding rack ears
Weight - Net / Shipping 9.5 lb (4.31 kg) / 12.5 lb (5.67 kg)
Mounting May be rack mounted or may be used separate from rack
Operating Temperature 0° to 50° Celsius
Internal Power Requirements
AC Input Voltage Autodetect 100-240 VAC
AC Input Current 0.3 A RMS
Frequency 50 – 60 Hz
Power Cord IEC-type detachable 6 ft. cord
Specifications
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1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174
DSP-30 Spec Sheet - 06/17/08
qscaudio.com
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