Grass Valley Kalypso User Manual V.15.0 - Manual (Page 228)

228 Kalypso — User Manual
Section 3 — System Operation
Bus Linking
Overview
Bus linking allows a source selection on one bus to change the source on
another bus. Suite configuration settings permit the establishment of a one-
to-one relationship between different buses (a Controlling bus can affect one
other Linked bus). Once this link is established, sources on the Controlling
bus can be associated with sources on the Linked bus, such that selecting
that source on the Controlling bus causes the Linked bus to select that asso-
ciated source.
Multiple sources on a Controlling bus can be associated with a single
Linked bus source, so selecting any of those Controlling bus sources selects
that same Linked bus source. Controlling bus sources can also be given no
association, so selecting that Controlling bus source has no effect on the
Linked bus.
The collection of all the source associations between two buses makes up a
Link Mapping table. This table resides in the Controlling bus and deter-
mines what commands the Controlling bus will send to a Linked bus when
a bus link is active. The Link Mapping table can be copied to another bus,
permitting rapid setup of multiple bus links.
Examples
A typical use of Bus Linking is to have the buses of one M/E follow the
selections on another with a few source substitutions. For example, if
there's a special camera only used for the primary customer's feed, a Linked
bus used for a secondary customer’s feed might select a wide shot when-
ever that camera was selected on the Controlling bus.
Another example is to prevent feedback when selecting a studio wide shot.
Many modern sets include monitors, and these will typically be fed from
an aux bus of the switcher with program output selected. When the wide
shot camera is selected on PGM-PST A bus, the camera might pick up the
monitor wall and generate video feedback. This can be prevented by asso-
ciating all source selections on PGM-PST A except the wide shot camera to
select PGM-PST A on the aux bus. The wide shot camera source is then
associated to an alternative graphics source on the aux bus appropriate to
the show.
Another possibility is to program the M/E 3 A row as an extension of the
PGM-PST A bus for shows that need instant access to more than 32 sources
without pressing the Shift button. In this case M/E 3 A is the Controlling
bus and PGM-PST A is the Linked bus. In this scenario, the easiest way to
set this up is to link the buses and map the sources one to one, then set the
shift preference for M/E 3 A to Shifted. An alternative method is to map