Specifications

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SymNet Application: Audio DistributionSymNet Application: Audio Distribution
Express Cobra
SymNet Express Cobra is a family of 19 ” rack-mountable digital signal
processors (DSP) that are setup and controlled by SymNet Designer
software. They are ideal for audio applications such as churches, con-
ference rooms, courtrooms, night clubs and many others. ARC Wall
Panels easily integrate with Express hardware and provide simple
user control of the system.
There are four analog I/O options available for the Express line:
12x4, 4x12, 8x8, and 4x4. Express devices also employ the industry-
standard CobraNet
®
technology to share audio between devices
supporting 16 inputs and 16 outputs of CobraNet audio over
Ethernet in addition to the analog I/O. Express devices are intended
for single device installations as well as installations with modest
expansion requirements.
Devices are initially configured through the RS-232 port on the rear
panel. This same port is used to connect to external control systems
from AMX, Crestron, and others. Once the system is initially config-
ured, Express devices can be addressed and controlled over Ethernet.
Any of the ARC Wall Panels can be connected via CAT5 cable to an
RJ-45 jack on the rear panel. One channel of analog audio can be
routed to or from the wall panel over the CAT5 cable for simple pag-
ing or monitoring needs. Express also includes an RS-485 port for
extending the ARC and external control capacity.
Specifications
GENERAL SPECIFICATIONS AUDIO SPECIFICATIONS
Processors
2 x Analog Devices SHARC 21161N @
100 MHz SIMD
Converter Type
24-bit Sigma Delta
Raw processing capacity
200 MIPS, 800 MFLOPS sustained
Sampling Rate
48 kHz, +/- 100 ppm
Analog control inputs
0-5 VDC
Frequency Response
20-20 kHz, +/- 0.5 dB
Recommended external control poten-
tiometer
10k Ohm, linear
A/D dynamic range
> 110 dB, A-weighted
RS-232 host serial I/O
115.2 or 57.6 kbaud, 8 data bits, 1 stop
bit, no parity, no flow control wired
straight-through, only pins 2, 3, and 5
required
D/A dynamic range
> 110 dB, A-weighted
RS-232 accessory serial I/O
38.4 kbaud (default), 8 data bits, 1 stop
bit, no parity, no flow control wired
straight-through, only pins 2, 3, and 5
required
Total THD+ Noise
< 0.005% @ 1 kHz, -1 dBFS
RS-485 serial I/O
38.4 kbaud (default) 8 data bits, 1 stop
bit, no parity, no flow control wired in
parallel with STP cable.
Delay memory
43 mono seconds
Ethernet/CobraNet Cable
Standard CAT5, maximum device to
device length = 100 meters
Input impedance
6.67k Ohms, balanced
ARC Cable
Standard CAT5, distance dependent
upon load.
Output impedance
204 Ohms, balanced
Maximum devices per SymLink Ring
1
Maximum input level
+29 dBu with 6 dB pad, +23 dBu w/o pad
Maximum SymLink Rings
31
Maximum output level
+24 dBu, 100k Ohms; +21 dBu. 600 Ohms
Maximum stored presets
1000
Mic preamp EIN
-129 dBu typical, 22-22 kHz, A-weighted
Phantom power (per input)
+48 VDC, 10 mA
Input CMR
> 70 dB @ 60 Hz
Channel separation
> 100 dB, in through out @ 1 kHz
Express 12 x 4 Cobra
DSP Hardware