User`s manual

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Barco – iStudio – R5976569 – user's manual – revision 09 – March-2007
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5-16
Time Setup – Wall – LTCVITC
Apart from NTP signals also an LTC (longitudinal time code) or VITC (vertical interval time code) signal can be
used for the external synchronization of the time of the H
YDRA wall. Select in the Modules list all HYDRA modules
that shall synchronize with an LTC or VITC signal. Modules not selected in this list will internally synchronize via
NTP to the externally synchronized modules, which result in the whole wall is synchronized.
The signals can be inserted via the D15 connector of the overlay input card. Alternatively also the VITC signal of a
video source can be used. The mode list specifies whether LTC or VITC and in which order they shall be used.
• LTC: Use only LTC
• VITC: Use only VITC
• LTC + VITC: Use LTC if available, else use VITC
• VITC + LTC: Use VITC if available, else use LTC
For VITC sources additionally their video type PAL or NTSC must be indicated. In the Synchronization via section
select Overlay, if the source with the synchronization signal is applied to the overlay input card; select Source if
the VITC of a video source that applies to a video input card shall be used and indicate the respective number of
the input.
If multiple H
YDRA modules are used for LTC/VITC synchronization then the source that carries the
time signal must be applied at the same position (same source number on all concerned modules
or on all modules via the overlay input)!
Figure 5-14
Setup time dialog – LTC/VITC configuration (detail)
With LTC/VITC synchronization also the configuration of an NTP alarm for each module is advisable because the
modules are synchronized with each other via NTP; please refer to section
5.3.4 Setup module (Alarm tab).
VITC and LTC might allow jumps of the submitted time of maximal 17 minutes. This will bring the
system partially out of sync. A H
YDRA wall will need about 15 minutes to get synchronized again.
The following procedure helps to solve that problem faster:
Using LTC/VITC and a time jump occurs:
• Wait until all H
YDRA modules report an NTP alarm.
• Apply the command Reset Software (Wall), see section
5.2.5 Wall Control.