NewTek TriCaster 8000 - Manual (Page 167)

Page | 151
Thus, serving i) TriCaster’s Genlock input and ii) other video devices in the chain
with a single reference is the best approach.
You could think of it this way:
 Genlocking your cameras has the effect of locking their output together,
ensuring optimal synchronization for live switching. This may result in
throughput latency benefits.

Supplying the same sync source to TriCaster’s Genlock input ensures a match
between TriCaster output and any downstream video devices required to
handle both it and other (genlocked) sources.
Note: Digital audio is less tolerant in certain respects than analog. Some devices require
SDI sources to be genlocked when mixing digital audio (whether for recording or live
production).
TriCaster, however, includes dynamic audio re-sampling for each input. Genlocking of
SDI audio/video sources is not a requirement. Still, genlocking sources and TriCaster to
a house reference signal, or genlocking the cameras directly to the TriCaster output is
encouraged (to genlock cameras, see your camera manual).
V ERTICAL P OSITION , H ORIZONTAL P OSITION AND P HASE
Locking all devices to house sync is important, but this alone does not actually
ensure a perfect downstream match. Consider an army marching along: each step
the soldiers take occurs at precisely the same moment, so we could say their timing
is synchronized. Even so – problems result if one soldier leads with the left foot
while everyone else is on the right. Or perhaps everyone is evenly spaced and
perfectly aligned but for one misfit who ‘tailgates’ the soldier ahead of him and
keeps stepping on his heels.
This is essentially why TriCaster provides several adjustments in its Genlock section.
The Horizontal and Vertical Position settings pin the image in the proper space in the
frame, and in doing so could be likened to making sure each marching soldier is in
position relative to his fellows (as viewed from above).