GRASS VALLEY KARRERA, Installation & Service Manual

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Basic Configuration
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indicator for Look Ahead. Look Ahead tributaries do not necessarily leave the switcher as
video signals. For example, an M/E has four program outputs but only two physical
preview outputs. The LAP information for all four program outputs may be included in a
tally calculation.
However, if an M/E is placed down stream of Pgm-Pst the On Air tally calculation can be
configured to start at that M/E's program outputs. If this situation is planned, it is
recommended that aux buses be set up to provide the real program outputs for the
switcher and the On Air calculation configured using those aux buses as the tributaries.
You can use more than one starting point for tally calculations. Programmable clean feed
(FlexiKey) and DoubleTake allow the exclusion of video signals from the M/E main output
(PGM A) that appear on one of the other program outputs. Include the other program
outputs with the M/E main output (PGM A) as calculation starting points to tally all the On
Air sources.
The Bus Selection tally calculator indicates which sources are selected on a specified set of
switcher buses. The tally calculator using this method does not trace tributaries upstream; it
only tells what sources contribute to the specified bus(es), even if the source is an M/E. For
example, a Bus Selection tally calculation could be set up to indicate which source is
selected on the Pgm-Pst A bus, permitting audio-follow-video selections to be run by the
tally system.
Switcher Relay Tally Calculator Menus
The GV K-Frame XP Switcher Tally menus are used to select calculators, methods, and levels,
name calculators, and assign items to Tributaries.
There are six independently running tally calculators. For example, the system can calculate
On Air tally independently each suite, and at the same time can calculate Look Ahead tally,
and M/E output tallies for three M/Es. The first of the tally calculators is reserved for On Air
tally calculations for the current suite. The other four tally calculators can be assigned to
other suites.
Up to four tributaries can be included as the basis for each tally calculation. For example,
multiple program outputs of the PGM/PST bank are typically included in the On Air tally
calculation. The final tally source list is a union of the sources found on each of the four
tributaries. If aux buses are used as the program outputs of the switcher, up to four aux
buses can be the basis of On Air tally calculations. Tally calculations do not require actual
outputs, for example, LAP tributaries are virtual and may never leave the M/E.