Filter
Top Products
2-19
Transition Subpanels
A new background source may be selected on the B Background
bus when you are at the midpoint of a preset black mix. In the
same manner, next-transition delegation buttons, keyer modes, or
keyer sources may also be changed. None of these changes will
abort the preset black transition.
Configuring the BLACK Crosspoint — When mapping inputs to
pushbuttons, one of the choices in the Configuration menu is
BLACK, and another choice is
NONE. Your selection will have an
effect on how PST BLK operates, and what will happen in the
event the controller CPU fails.
When the first transition during a preset black operation is
completed, the BLACK crosspoint is automatically selected on the
A Background bus. If black has not been assigned to any
pushbutton, the PST BLK button is disabled and the preset black
function is not permitted. On the other hand, if black has been
assigned to more than one pushbutton, preset black will select the
leftmost BLACK pushbutton. If a pushbutton is assigned to
NONE
,
black appears when that button is selected; however the preset
black function will not use this as the BLACK crosspoint. This
action permits the user to have a known signal appear when an
undefined pushbutton is pressed, while also allowing the preset
black function to select a specific BLACK crosspoint.
To summarize operation: if the user has
NONE
assigned to one or
more pushbuttons, but does not have black assigned to any
pushbutton, the preset black function will think black is not
available and will be disabled as described above.
Processor Failure—The BLACK crosspoint is also important in the
situation where the Controller main CPU fails while one of the
M/Es is performing a re-entry. When it fails, the M/Es are
required to abandon their re-entry crosspoints and select BLACK
on the same bus. In the case where black was never assigned to a
pushbutton, the M/E selects the leftmost crosspoint on the bus.
BLACK