QSC BASIS 904zz Hardware Manual page 3

Introduction
The BASIS 904zz provides the digital audio transport, signal
processing, control and status monitoring facilities needed
to bind a group of amplifiers and loudspeakers into an inte-
grated functioning system. In conjunction with QSCon-
trol.net software, the BASIS 904zz enables the user to
design, test and deploy professional audio reinforcement
and distribution systems ranging in size from one to hun-
dreds of channels.
Each QSC power amplifier connects directly to a BASIS
904zz via one of its eight QSC DataPorts. All mission-critical
elements of the BASIS-driven sound system are monitored.
User-selected events are logged and loudspeaker protection
features unique to BASIS such as QSC's power limiter are
made possible through the DataPort functionality.
A standard Windows computer is the principle user-inter-
face for controlling the overall BASIS/QSControl system.
However, the BASIS 904zz also offers a front panel interface
for accessing critical functions.
A single QSControl server computer can support several cli-
ents running QSC's latest Venue Manager software. Thus,
the sound system can be operated via several computers,
roaming wireless laptops, tablets, etc., all at the same time,
1- Power indicator
2- Diagnostic indicator
3- Network status indicators
4- Port connection status indicators
5- Multi-function push buttons
6- Display
7- Rotary select/accept knob
8- Safe Mode push switch (recessed)
9- DataPorts
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from anywhere a connection to the QSControl network is
available.
The QSControl network can also be managed from a single
computer running both the client and the server. Once all
BASIS devices in a system are configured, a computer is no
longer required on that system's network. All basic func-
tions of the BASIS 904zz continue to operate with or with-
out a control computer connected to the network.
Audio enters a BASIS 904zz from CobraNet source devices
such as QSC's line of RAVE digital audio routers. Any combi-
nation of 24 CobraNet channels (selected from up to 4 bun-
dles of 32 channels) can be routed into the 24 x 24 DSP
engine. Any or all of the 24 DSP channels can also be routed
to up to 32 CobraNet channels on the network.
Unlike many configurable DSP boxes, the intrinsic process-
ing latency of the BASIS 904zz is both short and fixed at
0.396 milliseconds. The delay does not change regardless of
the DSP configuration, unless the configuration intention-
ally adds more delay.
10- Monitor chain in/out
11- Relay outputs
12- Logic outputs
13- Omni inputs
14- RS-232 port
15- Network status indicators
16- QSControl 10BaseT receptacle
17- CobraNet 100BaseTx receptacle
18- IEC power inlet
See page 14 for detailed descriptions.
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