Tri-Level Sync is the prefered genlock signal for HD
equipment. It provides more accurate timing tolerances
and should be used whenever possible.
For certain HD formats, including yours(1080i/59.94)
most manufacturers designed their gear to lock to
standard Black Burst(sometimes called Bi-Level).
There are instances where you can't get away without
Tri-level sync, for instance when you use an HDCAM
F500 deck to perform a 3:2 pulldown.
Bogdan Grigoresco, BSEE
Sr. Broadcast Engineer
Finalé Editworks, Vancouver
--- philc <ds(at)mbaproductions.com> wrote:
> What is the purpose of Tri-Level Sync? Is it used
> during capture and
> output only or only output?
>
> I am starting a 1080i/59.94 project with both DS
> Nitris and an HD
> Adrenaline. I have Tri-Level on the Nitris but have
> never fully
> understood the purpose. Also, I am wondering if I
> need it for the
> Adrenaline. My HD sources are HDcam 1080i--final
> master to HDcam.
>
> --
> Phil Coulloudon
> Senior Editor / Compositor
> Martin Brinkerhoff Associates
> 949.660.9396
>
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