BASIS 902zz - Audiologic
BASIS 902zz Digital System, QSC’s next generation network audio
system, achieves the seamless integration of the
company’s signal transport, control, processing, and
monitoring technologies. 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 902zz
The BASIS platform meets the control, monitoring, signal
transport and processing needs of amplification and
loudspeaker systems over an Ethernet network. The BASIS
902zz units combine three distinct QSC technologies
within a single hardware unit. Amplifier and loudspeaker
DSP Outputs
CobraNet DataPort
24 of 32
24 x 24
4(8 channels) 32
• 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
control, monitoring and protection, configurable DSP, and
CobraNet™ audio transport are seamlessly integrated into
one powerful single RU package.
• Snapshots can recall config or block and/or parameter settings
Through, QSC’s BASIS and next-generation
RAVE and DSP products can be networked together and
controlled from a single software interface. In addition,
• Matrix mixer – any size, up to 24 x 24
•THX™ approved for professional cinema applications
DSP functions include, but are not limited to:
• Automixers – gain sharing
multiple networked computers can be set up to control
and monitor all of the units simultaneously.
• Routers – any size, up to 24 x 24
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. QSC’s fixed latency DSP is
configurable DSP that stays fast and predictable from one
configuration to the next.
• Graphic equalizers
•Crossovers – Linkwitz-Riley, Butterworth, Bessel-Thomson in-phase, BesselThomson symmetrical, 2-way, 3-way, and 4-way general purpose adjustable
For more information, visit
• Pink noise, white noise, sine generators
CobraNet is a trademark of Cirrus Logic, Inc.
THX is a trademark of THX Ltd.
• Gain controls – any channel count, up to 24
•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
• 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
• Delays
• Macros – user-definable custom blocks with password protection
BASIS 902zz
Dynamic Range (AES-17, -60 dB method, all sensitivities)
Unweighted A weighted Distortion (20 Hz – 20 kHz, all sensitivities)
+4 dBu (maximum) 2 dB below clip (maximum) Crosstalk (20 Hz – 20 kHz)
Inter-channel (maximum) Inter-channel (typical) Intra-channel (maximum) Intra-channel (typical) Frequency Response
20 Hz – 20 kHz (maximum) 20 Hz – 20 kHz (typical) Audio Converters Mute Delay Network to BASIS
CobraNet input through full DSP chain to analog output INPUTS/OUTPUTS Program Outputs
Connector Type Cable Type Available “Stock” Lengths Maximum Qualified Length MONITOR
Control Room Foldback Monitoring
Connector type Pinout Tap Points Monitor Input
Monitor Signal (unit off) Maximum Level Impedance (nominal) CMRR, 20 Hz – 20 kHz Monitor Output
Monitor Frequency Response (20 Hz – 20 kHz) Distortion (20 Hz – 20 kHz) Noise Floor Output Impedance (nominal) Output Load (minimum) Monitor Level
Control Range (nominal) CONTROL INPUTS/OUTOUTS
Relay Outputs Connector Type Configuration Pinout Switching Capacity (nominal) Logic Outputs Connector Type Configuration Pinout Omni Inputs Connector Type Configuration Pinout Normal Operating Range Potentiometer Operation Voltage Tolerance Current Output RS-232 Port
QSControl Port
CobraNet Port Indicators
QSControl Status CobraNet Status Power Diagnostic DataPort Status (port) LCD Data Display Specifications
> 112 dB > 115 dB < 0.009% THD+N < 0.009% THD+N > 75 dB
> 90 dB
> 85 dB
> 100 dB
+/- 0.5 dB
+/- 0.2 dB
24 bit, 48 kHz (output)
Infinite attenuation
Standard CobraNet™ latency 6.313 milliseconds Low latency
3.646 milliseconds
8 outputs
4 HD-15 DataPort connections
QSC DataPort cable, QSC p-n DPC-x (“x” designates cable length in feet)
1, 2, 3, 4, 5, 6, 10, and 20 ft., custom lengths available
328 ft. (100 m) using QSC DP cable only / Non QSC cable limited to 6 ft. (audio only)
5-pin “phoenix style” (a.k.a. “euro style”) detachable terminal blocks
1:+(input) / 2:-(input) / 3:CHASSIS GND / 4:-(output) / 5:+(output)
8 internal input / 8 internal output / 8 amplifier (pre-, post-, amplifier) software selectable
Unity gain connection, relay bypass
+21 dBu
10k ohms
> 54 dB
Sum of monitor input and signal from internal monitor tap point(s)
+/- 0.5 dB
< 0.05% at +4 dBu
> 90 dB
0 dB to -95.5 dB in 0.5 dB steps
2 discrete floating relay switch outputs
3-pin “phoenix style” (a.k.a. “euro style”) detachable terminal blocks
Electromechanical relay
1:NC / 2:NO / 3:COM
1A 30 VDC
4 discrete outputs
2-pin “phoenix style” (a.k.a. “euro style”) detachable terminal blocks
Single-ended, TTL compatible
1:+(Signal) / 2:-(CHASSIS GND)
6 discrete inputs for TTL logic, voltage control or passive resistance
2-pin “phoenix style” (a.k.a. “euro style”) detachable terminal blocks
Single-ended, ground referenced
1:+(Signal) / 2:-(CHASSIS GND)
Reads signals between 0-5 V nominally
Use 10k ohms for full range
+/- 48 V
0.5 mA with 10k pot (for passive resistive controls)
Female DB9 connector (setup and diagnostics only)
Neutrik Ethercon RJ45 ruggedized data connector
Neutrik Ethercon RJ45 ruggedized data connector
Yellow Link, Tx, Rx, front panel / Green Link, Tx, Rx, rear panel
Yellow Link, Tx, Rx, front and rear panel
Blue, front panel
Red, front panel
Tri-state (red, green, yellow), front panel
2 line x 16 character, backlit, front panel
Specifications subject to change without notice.
1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174
BASIS 902zz - 04/23/07
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