NewTek 3Play 3P1, Руководство пользователя

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Figure 67
This allows 3Play output to be synchronized to other external equipment that is locked to the same
reference. Genlocking is not an absolute requirement in most cases, but is recommended whenever you
have the capability.
Tip: “Genlock” refers to “generator locking”. Professional video devices often provide a “genlock input”,
which allows an external reference signal (often referred to as ‘house sync’) to control its video timing.
The output of video devices connected in this manner is synchronized to the reference signal, and they
are referred to as ‘genlocked’.
The 3Play system accepts input from multiple video sources. Miniscule local timing differences between
these may result in tiny delays during downstream switching operations.
Serving the same reference signal to i) the system’s Genlock input and ii) other video devices in the chain
is the best approach, and ensures a match between 3Play system output and any downstream video
devices required to handle both it and any other (genlocked) sources.
VERTICAL POSITION, HORIZONTAL POSITION AND PHASE
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.
Figure 68