LAWO mc256 MKII, Technical Manual

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mc²56 MKII Technical Manual V5.10.2/1 14
Chapter 1: Technical Overview
RAVENNA Interfaces
RAVENNA Interfaces
RAVENNA is implemented throughout the Lawo product range. In mc
2
/Nova systems, it can be used to replace
MADI as the audio interconnect between the Nova routing matrix and DALLIS stageboxes. Or, to distribute
signals to other RAVENNA-compatible devices.
In this example two different types of RAVENNA are in use:
·
RAVENNA Net (IP Layer 3) - for connections to remote DALLIS and other RAVENNA-compatible devices.
·
RAVENNA Link 1.0 - a proprietary implementation of RAVENNA used for directly-wired connections (up
to 80m).
RAVENNA "Links" (Link 1.0) are recommended for local point-to-point connections such as those from the
console's Local IO and DALLIS units to the system Core (e.g. Nova73). This is because, once they are defined by
AdminHD, the Links are self-configuring and have no impact on the streaming network's bandwidth or
configuration. RAVENNA Links must be
directly wired; connection via a network switch is not permitted.
RAVENNA "Net" (IP Layer 3) offers more flexibility as signals are distributed via the IP network. Each streaming
port can be configured as a DALLIS, Virtual Devices or Tie-line port supporting up to 128 bi-directional channels.
DALLIS ports may connect to a single 128-channel, or two 64-channel DALLIS frames, making RAVENNA more
flexible and port-efficient than its MADI equivalent. Virtual Device ports support up to 16 x 8-channel devices
including Lawo's
A__line and LCU (Lawo Commentary Unit), and Neumann's DMI-8 . RAVENNA Tie-Lines should
be configured to support streaming to/from other RAVENNA-compatible devices. Synchronization of the
RAVENNA streaming network requires a PTP master clock source. This can be achieved by using one of the
RAVENNA nodes as PTP master or by installing a third-party PTP Grandmaster device.
For more information on installing, connecting and configuring a RAVENNA network, please see the separate
"RAVENNA for mc
2
/Nova User Guide" and "RAVENNA Networking Guide".