QSC Audio 922dz User Manual

BASIS 922dz

QSControl.net Digital System

QSControl.net, QSC’s next generation network audio
system, achieves the seamless integration of the
company’s signal transport, control, processing, and
monitoring technologies. QSControl.net brings together
QSC’s digital, power amplification and loudspeaker
products into a unified system that enables the user
to administrate it all via a fully integrated graphical
user interface. The new generation BASIS devices
are designed to operate under the company’s
QSControl.net platform.

BASIS 922dz

The BASIS platform meets the control, monitoring, signal
transport and processing needs of amplification and
loudspeaker systems over an Ethernet network. The BASIS
922dz units combine three distinct QSC technologies
within a single hardware unit. Amplifier and loudspeaker
control, monitoring and protection, configurable DSP, and
CobraNet™ audio transport are seamlessly integrated into
one powerful single RU package.

Through QSControl.net, QSC’s BASIS and next-generation
RAVE and DSP products can be networked together and
controlled from a single software interface. In addition,
multiple networked computers can be set up to control
and monitor all of the units simultaneously.

Fixed Latency DSP

Users of most other configurable DSP systems are
familiar with a variable latency inherent in the processing
configuration. Add more processing blocks and you also
add delay, whether you want it or not. QSC’s DSP engine
is unique in having a short and fixed processing latency
through the DSP subsystem. When the A/D and D/A
converters are included, the total digital-to-analog latency
of a single unit is a negligible 2.167 milliseconds. QSC’s
fixed latency DSP is configurable DSP that stays fast and
predictable from one configuration to the next.

For more information, visit www.qscontrol.net

CobraNet is a trademark of Cirrus Logic, Inc.
THX is a trademark of THX Ltd.

Inputs DSP Outputs

AES/EBU CobraNet DataPort CobraNet

8 digital 16 of 32 24 x 24 4(8 channels) 32

Features

• Amplifier and loudspeaker control, monitoring and protection

• Configurable DSP functions and signal paths

• Fixed latency DSP engine

• Ethernet controllable

• CobraNet audio transport with new intuitive GUI

• Two Ethernet ports – CobraNet and control can be run over a single cable
or be divided between the two ports. The CobraNet port is 100Base-T. The
control port is 10Base-T

• Each unit can store eight design configurations that can be changed on the fly

• Snapshots can recall config or block and/or parameter settings

™ approved for professional cinema applications

• THX

DSP functions include, but are not limited to:

• Matrix mixer – any size, up to 24 x 24

• Automixers – gain sharing

• Routers – any size, up to 24 x 24

• Gain controls – any channel count, up to 24

• Graphic equalizers

• Filters – high-pass, low-pass, all-pass, shelf, parametric, parametric shelf,
Butterworth high and low-pass, Linkwitz-Riley high and low-pass, Bessel­Thomson high and low-pass

• Crossovers – Linkwitz-Riley, Butterworth, Bessel-Thomson in-phase, Bessel­Thomson symmetrical, 2-way, 3-way, and 4-way general purpose adjustable

• Compressors, peak limiters, AGC’s, gates, dynamics processor

• Duckers – up to 8 channels, up to 60 seconds fade in and fade out times,
priority mix

• Pink noise, white noise, sine generators

• Delays

• Macros – user-definable custom blocks with password protection

BASIS 922dz

PERFORMANCE

Dynamic Range (AES-17, -60 dB method, all sensitivities) In Out Thru
Unweighted > 140 dB > 112 dB 112 dB
A weighted > 140 dB > 115 dB 115 dB
Distortion (20 Hz – 20 kHz, all sensitivities)
+4 dBu (maximum) < 0.009% THD+N < 0.009% THD+N < 0.009% THD+N
2 dB below clip (maximum) < 0.009% THD+N < 0.009% THD+N < 0.009% THD+N
Crosstalk (20 Hz – 20 kHz)
Inter-channel (maximum) > 75 dB
Inter-channel (typical) > 90 dB
Intra-channel (maximum) > 85 dB
Intra-channel (typical) > 100 dB
Frequency Response
20 Hz – 20 kHz (maximum) +/- 0.5 dB
20 Hz – 20 kHz (typical) +/- 0.2 dB

Audio Converters 24 bit, 48 kHz, in and out
Mute Infinite attenuation
Delay Standard CobraNet™ latency Low latency

BASIS to Network 6.917 milliseconds 4.250 milliseconds
Digital input through full DSP chain to CobraNet output
Network to BASIS 6.313 milliseconds 3.646 milliseconds

CobraNet input through full DSP chain to analog output

BASIS to BASIS 7.896 milliseconds 5.229 milliseconds

Digital input through full DSP chain, over CobraNet network,

through full DSP chain, to analog outputs

BASIS in stand-alone mode 2.167 milliseconds (default group delay)
Digital input through full DSP chain to analog outputs

INPUTS/OUTPUTS

Program Inputs 4 AES/EBU pairs (8 channels)
Connector type 25-pin DB-25 style
Type Electrically balanced
Grounding All shield terminals connected to chassis
Pinout AES1+ = pin 7 (L/R) / AES1- = pin 15 (L/R)
AES2+ = pin 24 (C/SW) / AES2- = pin 23 (C/SW)
AES3+ = pin 8 (Ls/Rs) / AES3- = pin 16 (Ls/Rs)
AES4+ = pin 22 (Bsl/Bsr) / AES4- = pin 21 (Bsl/Bsr)
Input Impedance 120
Input Sample Rate AES/EBU sample rate must be 48 kHz and is internally synchronized
Program Outputs 8 outputs
Connector Type 4 HD-15 DataPort connections
Cable Type QSC DataPort cable, QSC p-n DPC-x (“x” designates cable length in feet)
Available “Stock” Lengths 1, 2, 3, 4, 5, 6, 10, and 20 ft., custom lengths available
Maximum Qualified Length 328 ft. (100 m) using QSC DP cable only / Non QSC cable limited to 6 ft. (audio only)

MONITOR

Control Room Foldback Monitoring
Connector type 5-pin “phoenix style” (a.k.a. “euro style”) detachable terminal blocks
Pinout 1:+(input) / 2:-(input) / 3:CHASSIS GND / 4:-(output) / 5:+(output)
Tap Points 8 internal input / 8 internal output / 8 amplifier (pre-, post-, amplifier) software selectable
Monitor Input
Monitor Signal (unit off) Unity gain connection, relay bypass
Maximum Level +21 dBu
Impedance (nominal) 10k ohms
CMRR, 20 Hz – 20 kHz > 54 dB
Monitor Output
Monitor Sum of monitor input and signal from internal monitor tap point(s)
Frequency Response (20 Hz – 20 kHz) +/- 0.5 dB
Distortion (20 Hz – 20 kHz) < 0.05% at +4 dBu
Noise Floor > 90 dB
Output Impedance (nominal) 100
Output Load (minimum) 600
Monitor Level
Control Range (nominal) 0 dB to -95.5 dB in 0.5 dB steps

CONTROL INPUTS/OUTOUTS

Relay Outputs 2 discrete floating relay switch outputs
Connector Type 3-pin “phoenix style” (a.k.a. “euro style”) detachable terminal blocks
Configuration Electromechanical relay
Pinout 1:NC / 2:NO / 3:COM
Switching Capacity (nominal) 1A 30 VDC
Logic Outputs 4 discrete outputs
Connector Type 2-pin “phoenix style” (a.k.a. “euro style”) detachable terminal blocks
Configuration Single-ended, TTL compatible
Pinout 1:+(Signal) / 2:-(CHASSIS GND)
Omni Inputs 6 discrete inputs for T TL logic, voltage control or passive resistance
Connector Type 2-pin “phoenix style” (a.k.a. “euro style”) detachable terminal blocks
Configuration Single-ended, ground referenced
Pinout 1:+(Signal) / 2:-(CHASSIS GND)
Normal Operating Range Reads signals between 0-5 V nominally
Potentiometer Operation Use 10k ohms for full range
Voltage Tolerance +/- 48 V
Current Output 0.5 mA with 10k pot (for passive resistive controls)

RS-232 Port Female DB9 connector (setup and diagnostics purposes only)
QSControl Port Neutrik Ethercon RJ45 ruggedized data connector
CobraNet Port Neutrik Ethercon RJ45 ruggedized data connector
Indicators

QSControl Status Yellow Link, Tx, Rx, front panel / Green Link, Tx, Rx, rear panel
CobraNet Status Yellow Link, Tx, Rx, front and rear panel
Power Blue, front panel
Diagnostic Red, front panel
DataPort Status (port) Tri-state (red, green, yellow), front panel
LCD Data Display 2 line x 16 character, backlit, front panel

Ω (terminated)

Ω
Ω

Specifications

Specifications subject to change without notice.

1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: [phone]

BASIS 922dz - 0 4/23/07

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