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CobraNet®
- Digital Audio Network |
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CobraNet®
is a technology developed by Peak Audio, a division of Cirrus
Logic, to transport audio and control data over Ethernet networks.
CobraNet allows high quality audio to be transported via Ethernet’s
cost effective cabling and network infrastructure while maintaining
the integrity of the digital audio signal.
CobraNet users simply connect together all of their CobraNet-enabled
products via Ethernet switches or hubs in order to transfer
audio between them across the network. Signals can be addressed
to specific devices, or “broadcast” onto the network
so that they are available to any and all of the networked
devices and can be selected as required.
The standard Ethernet network protocol is not ideal for transmitting
audio, because it allows all of the connected devices to "talk"
at the same time. This causes collisions between data packets,
which then have to be managed by introducing random time delays.
A word processor doesn't really care if packet #1 arrives
after packet #2, or even after #15, because it can re-assemble
the packets in their proper order before displaying the document.
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Pro audio applications do not have this luxury: all the digital
audio data has to arrive, be decoded and transformed back into
sound in the order in which it was sent, and without interruptions.
This is where CobraNet comes in. Its software implements a protocol
that makes the transmission of data on the Ethernet network
"deterministic," ensuring that no collisions occur
and that the audio is transmitted seamlessly and in real time.
In this way CobraNet delivers the benefits of proprietary network
formats such as finite latency and real time audio, along with
the significant cost, convenience and reliability advantages
of standardized Ethernet hardware and cabling.et® is a technology
developed by Peak Audio, a division of Cirrus Logic, to transport
audio and control data over Ethernet networks. |
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PURPOSE
The Renkus-Heinz CobraNet Breakout Box allows the benefits
of CobraNet digital audio technology to be added to systems
without the need to purchase special amplification. It is
often used to retrofit existing systems with Cobranet technology
and to add CobraNet connectivity to Renkus-Heinz PN Series
self-powered loudspeakers.
OUTPUTS
Analog: The CobraNet Breakout Box has six
fully balanced output channels capable of signals in excess
of +6dbV. The Renkus-Heinz Cobranet Breakout Box is fully
balanced from the differential output 105db+ D/A converter,
through the balanced low pass 55KHz filter to the output.
A miniature Phoenix connector (supplied) is used on each output.
All outputs are muted on power On/Off. Any six of the signals
on the CobraNet digital network may be selected. Selection
is done via Renkus-Heinz CobraNet administration software
(included).
Frequency response is better that 20 Hz to 20KHz with THD+N
of less than .02%.
INTPUTS
CobraNet: Two RJ-45 Ethernet connectors on
CobraNet receivers allow for redundant signal transmission.
Analog: Two balanced line level analog inputs
are provided on the Renkus-Heinz Cobranet Breakout Box. The
one designated CNet can be used to insert an audio signal
onto the CobraNet network where it can be sent back to the
head end or to any other place on the CobraNet network. The
one designated Line In bypasses the CobraNet system and inserts
the audio signal directly into self- powered loudspeakers.
PHYSICAL
The Renkus-Heinz CobraNet Breakout Box is designed for mounting
in a cluster of self-powered loudspeakers and has mounting
flanges so that it may be attached to the rear of a loudspeaker
or elsewhere in the cluster. An optional rack mounting adapter
is available for applications that require amplifier rack
mounting. The CobraNet inputs as well as the analog inputs
and outputs are on the front panel.
POWER
The Renkus-Heinz CobraNet Breakout Box operates on 50/60 Hz
AC power from 90 to 260V. Line voltage selection is automatic.
Power input is through a latching Powercon connector. |
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Read more about CobraNet (.pdf)