NewTek TriCaster 2 Elite (3 RU) - Manual (Page 52)

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C ONFIGURE NDI G ENLOCK
NDI Genlock synchronization allows
video sync to reference a network-
supplied external clock signal over NDI.
This type of synchronization will be key
to future 'cloud-based' (and hybrid)
production environments.
The Genlock feature allows TriCaster to
'lock' its video output or NDI signal, to
timing derived from an external
reference signal (house sync, such as
'black burst') supplied to its genlock
input connector.
This allows TriCaster output to be
synchronized
to other external
equipment that is locked to the same
reference. TriCaster comes with additional options for Synchronization, (Figure 29) the pull down menu
conveniently centralizes all sync options and allows them to be changed on the fly.
When available, the External Video Clock (SDI) option minimizes latency by synchronizing output with other
local devices. (External NDI Source is similar, but syncs to a selected network source).
Ideally both the cameras and your NewTek system’s output should be genlocked. If they are not genlocked
to the same reference signal, by default the Switcher will automatically apply a TBC (Time Base Correction)
operation. (Time base correction may drop or insert frames as necessary to maintain sync, hence is a less
desirable approach.)
Genlocking is not an absolute requirement in most cases, but it is recommended whenever you have the
capability.
Tip: "Internal Video Clock" means clocking to the SDI output (best quality when connecting a projector to an
SDI output).
"Internal GPU Clock" means following the graphics card output (best quality when connecting a projector to a
Multiview output).
When genlocking is active and properly configured, the timecode in the titlebar will display in green.
FIGURE 30
Note: For a deeper discussion of genlocking, please see Section 8.2.2.
FIGURE 29