Setup guide

House Sync
31
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.
A typical star pattern sync topology
You also need to verify the following to make sure your topology is correct:
• Distance between distribution Amplifier (DA): If your DA feeds multiple machines
that are far apart, the stability and strength of the signal it sends will be crucial.
• Quality of the devices: A good DA in a star pattern topology will be necessary to
ensure that every device is properly referenced. A tri-level sync signal could be
distributed by an analog video distribution amplifier.
• Analog video routing switchers: The Nitris DNA has separate inputs for the SD and
HD sync, consider using an analog routing switcher to select between the various tri-
level sync signals.
Tri-level sync
generator
Master house
sync generator
NTSC/PAL
black-burst
generator
Video
Distr.
Amp
Avid Nitris DNA
SD VTR
HD VTR
Video
Distr.
Amp
To H D
Reference In
To analog
Reference In
To HD Tri-level
Sync
To S D S y n c