Calrec SUMMA, Installation Manual

Page: 54 / 96

54 SUMMA
Networked Audio Production System
Connection Information
SYNCHRONIZATION
The Summa processing core has
4 BNC connections for external
synchronization. If no external sync is
connected and selected, the console
will free-run on its own internal clock
generated by the active router card.
General rules of good practise require
that all equipment connected to the audio
console’s digital inputs and outputs are
locked to the same referenced sync
source as the console to ensure clean
audio.
In systems with multiple Calrec processing
cores connected together, it is of
paramount importance that all connected
processing cores are locked to the same
referenced sync source.
If one or more cores receives a sync signal
that is not locked from the same clock
reference as other cores, interruptions to
both audio and data carried by routers can
be caused. This can lead to false error
warnings and I/O boxes going offline.
Therefore, it is essential to consider a
robust sync distribution design for a
facility and to ensure all points in the chain
are correctly configured to lock to the
appropriate input and no elements, such
as sync regenerators, are free-running or
making changes to the reference source.
It is also recommended that backup sync
sources and paths are considered to
maintain full functionality in the event of
the loss of any part of the facility’s sync
distribution system.
External sync sources can be fed to
the BNC connectors at the top of the
processing core. Two inputs are available
for video formats, as well as an input for
TTL Wordclock and an input for AES3
digital audio reference.
See the Summa User manual
for information on how to set up
synchronization priority.
SYNC INPUTS
SyncInputs