Product specifications

House Sync
Workstation Setup & Administration Guide • 35
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Sync Topology When syncing analog and digital video/audio devices, it is always preferable to
feed every component with a separate black-burst or tri-level sync signal in a
star pattern. Some drifting or jittering problems can be caused by the video
reference being looped from one machine to another.
A typical star pattern sync topology
You also need to verify the following to make sure your topology is correct:
• Quality of the Distribution Amp (DA): If your DA feeds multiple
machines that are far apart, the stability and strength of the signal it sends
will be crucial.
• Distance between devices: A good DA in a star pattern topology will be
necessary to ensure that every device is properly referenced.
• Video converters: Some converters won't need to be fed a sync signal, as
they will reference themselves on the incoming digital video signal from a
device that will itself sync on a central color black sync signal. This is
possible because digital video is much steadier than its analog
counterpart, and the converter will always see the right frame size when
converting the signal.
• Routing switchers: Since the Equinox Break-Out-Box only has one Ref In
you may want to consider using an analog routing switcher to select
between tri-level and black-burst sync signals.
Tri-level sync
generator
Master house sync
generator
NTSC/PAL
black-burst
generator
Video
Distr.
Amp
Analog video routing
switcher or video patch
Avid|DS
Equinox
Break-Out-Box
SD VTR HD VTR
Video
Distr.
Amp
To HD
Reference In
To analog
Reference In
To Genlock Input