Reference Signal
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Reference Signal
Whenever you use more than one video or audio device in your video editing environment,
you must have a separate synchronization signal connected to each device. A sync generator
or reference signal provides a composite signal that locks all the devices (video and audio) to
the main video signal. If the devices are not in sync for example, a monitor might show
rolling, tearing, or incorrect colors in the picture whenever you send video between devices.
n
To make sure the configuration you are using is properly synced, read the documentation
that ships with each of your video devices.
c
Avid Symphony Nitris requires that the VTR and the Avid Nitris hardware be
genlocked to the same timing source when capturing or outputting a digital cut.
Sync Topology
When you sync 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. Avoid
looping the reference signal by terminating any unused loop out with a 75 ohm terminator.
Typical Sync Topology
Tri-level sync
generator
Master reference
signal
NTSC/PAL
black-burst
generator
Video
Distr.
Amp
Avid Nitris
SD VTR
HD VTR
Video
Distr.
Amp
To HD
Reference In
To analog
Reference In
To HD Tri-level
Sync
To SD Sync
Summary of Contents for Nitris
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