Grass Valley Karrera Video Production Center v.4.0 - Manual (Page 267)

KARRERA — User Manual 267
Transition Chaining
In the Background Chaining menu, in the Chain 1 / Chain 2 data pads, a “ B ” is
displayed next to the ME when that ME’s background is part of the Back-
ground chain (
Figure 145 ).
Note An ME can only belong to one Background Chain at a time, so once chained
it will be grayed out and unavailable to the other chain.
Partition Sync Mode
There is no general need to chain the primary and secondary partitions of
an ME, this can be done by selecting both the
Pri and Sec buttons in the
Source Select area.
Partition Sync mode ( Sync Pri/Sec buttons) synchronizes or “locks” the
chained background transitions together and puts the Lever Arm in a
primary transition-only state, with the secondary transition attached. If
you perform a Primary and Secondary transition without Partition Sync on
for a split ME, the two outputs may be slightly offset. Turning on a
SyncPri/Sec button ( Figure 145 ) precisely synchronizes the backgrounds for
transition.
Partition Sync Locks Primary/Secondary Mode On
Partition Sync selects the ME’s Primary and Secondary partition. The Pri
button high tallies red and the Sec button high tallies green to indicate this
mode. Without using Partition Sync, there is no way to lock the Pri/Sec
mode on, so if you have a Program Clean Feed set up on Primary and Sec-
ondary partitions for re-entry, and you forget to turn the Pri/Sec mode on
for that ME, upon transition the secondary partition would not re-enter as
a clean feed so the Program Clean Feed would be lost.
Operations
Background and Key Chaining and Partition Sync are configured in the
Menu Panel.
With the introduction of Karrera DoubleTake, you could Split an ME and
it’s keyers between two feeds, for example one feed in English using the
Primary Partition and one in French using the Secondary or you could use
one partition with keyers for Left-Eye and one for Right-Eye for use with
3D. However, you were limited to six keyers divided between feeds, two of
them being “simple” keyers (Key 5 and Key 6). With Background Chaining,
you can have a split feed using two full MEs rather than two partitions,
with the power and flexibility of up to six keyers per feed (four full keyers
and two simple) and two backgrounds (with the same or different sources
by using source substitution).