Specifications

Specifications
Architect’s & Engineer’s Specifications
MediaMatrix • A division of Peavey Electronics Corporation • http://mediamatrix.peavey.com
Features and specifications subject to change without notice • Copyright © 2010 Peavey Electronics Corporation, All rights reserved • Jul-22-10• 80307423
Configurable Audio Bridge
The audio network interface shall be a 1RU-high, 1/2RU-wide industrial package designed for fixed installation in engineered audio and communication systems.
It shall provide eight analog audio channels, each independently configurable as either a line-level analog output from the audio network, or a mic/line analog
audio input to the audio network. The audio network shall be CobraNet, operating on a 100Base-T Ethernet physical interface. The audio output signals
shall be monitored in the analog domain, and this monitoring signal shall be capable of transmission on the CobraNet network. The analog audio inputs shall
provide 48V phantom powering for microphones, and remote control of gain. The audio outputs shall provide remote control of level in the analog domain,
and mute by physical disconnection of audio signal drivers from the external connectors. The audio network interface shall be capable of being powered from
Power-over-Ethernet according to standard IEEE802.3-2008, or from 24V DC. The audio network interface shall feature front-panel meters to indicate audio
signal level on each channel, and status indicators for the network connection, power and system fault condition. The audio network interface shall provide
eight general-purpose I/O connections, each independently configurable as either a logic input, logic output, analog control voltage input, or high-voltage output.
The audio network interface shall provide a serial port, configurable to operate on either RS-232, EIA-485 or EIA-422 physical protocols. All connections except
for the Ethernet port shall be on Mini Euro connectors. Remote control and monitoring via Ethernet shall be possible for all functions and settings, including
audio input and output interface settings, audio level metering, CobraNet settings, GPIO configuration and signals, contact closure circuits and serial port
configuration and data. A software device to control and monitor the audio network interface shall be available for integration into the configuration file. The
audio network interface shall be the MediaMatrix Cab 8n or approved equal.
Front Panel
5-element LED audio level meter for each audio
channel, indicating -48dB, -12dB, -6dB, 0dB and
overload
Link LED indicates CobraNet connection status
Status/Data LED indicates Ethernet data activity
Fault LED
Power LED
Four rotary encoders behind panel (removable
without tools) for setting unit ID on network, to
identify it uniquely to control software
Rear Panel Connections
LAN: RJ-45 socket for CobraNet and control
communications on 100Base-T Ethernet, and
power via Power-over-Ethernet
Audio: 8 channels of balanced audio I/O with
screen, each on 3-pin Mini Euro connector that
may be independently selectable as input or
output
GPIO: Mini Euro connector with 8 independent
GPIO pins and 4 ground pins
Contact closure: Two user-controlled
contact closure circuits and one fault indicator
contact closure, each with normally-open and
normally-closed connections, on three-pin Mini
Euro connectors
Serial port: RS-232, EIA-485 and EIA-422
full-duplex serial port with screen, on five-pin Mini
Euro connector
External power in: 24V DC 1.6A on two-pin
Mini Euro connector
DC power output: 1A output at external power
voltage, on two-pin Mini Euro connector
Digital Audio Performance
Audio channels: 8, each software configurable as
input or output
Audio sample rate: 48kHz
Frequency response, inputs and outputs:
20 Hz – 20 kHz, +0/-0.3 dBr, referenced at 1kHz,
unity gain
Input THD+N: 0.01% 10Hz – 22kHz
measurement bandwidth, +4dBu signal with 20dB
headroom
Input dynamic range: 110 dB, A-weight filter
measure
Equivalent input noise: -126 dBu
Input CMRR: > 70 dB
Input gain control: -3 to +60 dB, 0.25dB steps,
remote control
Maximum input level: +24 dBu
Input impedance, mic mode: 1.9kOhm
Input impedance, line mode: 8.4kOhm
Phantom power: 48V, software-selectable per
input channel
Output THD+N: 0.006%, 10Hz – 22kHz
measurement bandwidth, +4dBu signal with 20dB
headroom
Output dynamic range: 110 dB
A-weight filter measure
Maximum output level: +18 dBu
Output level control: -96dBu to +22dBu full-
scale, analog level control
Output impedance: < 60 Ohms
Notes:
All specifications are typical for any channel
All measurements are made with an AC line of
240V RMS at 50 Hz
All measurements are made using 600 Ohm
balanced load unless otherwise stated
All measurements are made in the analog
domain with gain/attenuation set for unity unless
otherwise stated
CobraNet Performance
48 kHz sample rate, 5.33ms latency
Four transmit bundles, eight receive bundles
GPIO and Other Interfaces
8 GPIO ports: each independently
software-configurable to be logic level input,
logic level output, analog control voltage input, or
high-voltage output
Logic level input mode: 3.3V high level (LVTTL)
with reverse-voltage and transient protection
Logic level output mode: 3.3V high level
(LVTTL)
Analog control voltage input mode: 10-bit
resolution, 12V full-scale, reverse-voltage and
transient protection
High voltage output mode: voltage as supplied
by external DC power, current up to 1A on each
GPIO port, subject to total power available from
external DC power supply
2 user-controllable contact-closure circuits:
max voltage 30V DC, max current 1A
1 fault indicator contact closure circuit: max
voltage 30V DC, max current 1A
Serial port interface: selectable in software to
be EIA-485 (half-duplex or full-duplex), EIA-422
or RS-232
High-current power output: voltage as supplied
by external DC power, 1A current, subject to total
power available from external DC power supply,
additional ground pin
Mechanical Specifications
Chassis Style: 1RU high, 1/2RU wide EIA rack
package with mounting lugs available for installing
either one or two CAB 8n units in a 1RU space.
Dimensions: 9.5 in. (24.13cm) W x 14.5 in.
(36.83cm) D x 1.75 in. (4.45cm) H