Sirius 800 - Snell

System
The system architecture is designed to
accommodate up to 32 channels of audio
per video input and output.
All audio can be routed as a mono channel.
The system has capacity to process and
route up to 768 mono channels per input
and output card slot.
Minimal video delay is added through the
router on de-embedding and embedding
cards. Audio is delayed by a number of
lines, dependent on the signal standard.
Audio is re-embedded on later lines, whilst
ensuring switching lines as defined by RP-
168 are left clear of audio.
A single crosspoint card is used for all
audio routing. Audio redundancy is
performed by identical crosspoint cards
working in a master / slave configuration.
Output cards receive audio streams from
main and redundant crosspoint cards.
Fail-over of a single connection between
crosspoint and output is possible.
Video redundancy is 4+1 in Sirius 850 and
Sirius 840, 1+1 in Sirius 830.
Basic Routing Architecture
All input card positions have video
connections to video crosspoints (main
and redundant) and a multiplexed audio
connection to audio crosspoints (main and
redundant). Video and audio crosspoints
then connect to all output card positions.
This means all card combinations of
standard video, embedded audio, AES and
MADI are possible within a frame.
Inputs
Video De-embedding / Processing
Input Card
Process each mono audio channel
independently:
Gain (-72/+30dB, mute).
Signal phase invert.
16 independent audio mixers,
with a choice of original
embedded audio, processed
audio, or silence.
Audio delay (0-2 sec).
Audio channel swapping (shuffling)
– for each embedded audio channel,
choice of ‘original’ audio, ‘gain/invert’
audio, or mixed audio.
Pass video to the video crosspoint with
processed embedded audio.
Extract up to 16 channels of audio per
video input (SD, HD and 3G level A) and
pass all de-embedded audio channels
(including VUC bits) to the audio
crosspoint.
Four video monitoring outputs are
available. These are taken from a point
before all processing. Multiviewer
outputs are available from after input
card processing.
Monitoring and multiviewer signals
contain embedded audio present at
that point in the signal chain.
AES Audio Input Card
120 balanced AES plus 3 MADI streams
at nominal 48kHz sample rate.
Pass all input audio channels (including
VUC bits) to the audio crosspoint.
Pass asynchronous audio transparently
from any input.
Dolby E is flagged as non-audio and
passed transparently to the audio
crosspoint.
12 MADI inputs per input card (64 or 56
channel) nominal 48kHz sample rate.
Each MADI input can be asynchronous.