CM-SR644024_09-11-2023_Rev-25
Page. 35
System Connection Options
The console and stage racks should be connected using one of the system configurations shown over
the next few pages. The diagrams depict systems with one or two stage racks, using optical fibre and /
or coaxial cables, in either redundant or non-redundant configurations, plus as a digital snake.
IMPORTANT:
Best Practice when Designing a System
When using coaxial cable (3G HD-SDI), it is best practice
NOT
to tape power cables to the coaxial
cable. This could lead to interference with the signal and result in unwanted audio artefacts, or in
the worst case, total loss of audio. It is highly recommended that
all coaxial cables be connected
to the appropriate units
prior to powering
them on.
When designing a
non-redundant system
, it is extremely important to ensure that the
total cable
runs
do not exceed 100m for coaxial and 2km for fibre optic
.
When using
redundancy for a single stage rack,
the cable runs
(fibre optic or coaxial) from
MegaCOMMS Port A and B must be of
similar lengths -
up to a maximum of 100m for coaxial or
2km for optical.
When using
redundancy for two stage racks,
the optical and coaxial runs from the console to the
stage rack must not exceed 2km or 100m respectively - and must be of
similar lengths
. The
coaxial link cables connecting the two stage racks must not exceed 100m.
When designing a redundant or daisy chain system, MegaCOMMS port A or B from the console
MUST
be connected to
MegaCOMMS port A
- NOT port B. Any redundancy link cables must use
ports B on both units.
NOTE:
You cannot use coaxial and fibre optic cable on the same MegaCOMMS port at the same time.
One cable type must be selected for that port.
Cadac CM-J
series
SR series stage rack
Max Cable Run: Optical 2km
Max Cable Run: Coaxial 100m
One stage rack: Non-Redundant System using coaxial cables (or fibre optic)
OR