Filter
Top Products
2-18
Section 2 — Control Panel Descriptions
Pressing the PST BLK button selects a two-stage transition that
inserts black between the two video sources being mixed, wiped,
or cut. For example, instead of mixing directly between the A
Background and B Background buses during a background
transition, a preset black transition mixes, wipes, or cuts from the
A Background bus to black. When a second transition is
performed, black mixes, wipes, or cuts, away to the B Background.
After completion of the two transitions, PST BLK turns itself off
automatically.
In addition to this automatic cancellation, you can toggle PST BLK
on and off manually. If you turn off PST BLK while the transition
is on the black limit, the M/E or PGM-PST output will
immediately switch from black to the original signal. If you turn
off
PST BLK when it is off limit, the transition to or from black will
stop.
The PST BLK function is provided in each M/E and in the PGM-
PST mixer. PST BLK affects only the effect where it is selected and
not the entire switcher. The button lights when pressed and turns
off automatically when the second transition is complete. The
BLACK
video input button on the A Bus remains lit while the M/E
is on the black limit. The preview output for the M/E does not go
to black. The preview monitor continues to show the final result of
the two-stage preset black transition.
MIX and WIPE are unaffected when PST BLK is turned on. MIX and
WIPE
can be changed at any time during a preset black operation.
Preset Black always fades to a full screen black regardless of
whether the switcher is operating in layered mode or standard
mode.
An abort of Preset Black occurs when the operator selects a
crosspoint on the A Background bus while the M/E transition is
on the black limit. This abort causes the following to occur: the
preset black transition is cancelled, the PST BLK button lamp turns
off, all keys are dropped, and the selected crosspoint is taken fully
on-air. If the abort occurs in Layered Mode, the M/E is forced to
Standard Mode to ensure that the selected crosspoint is a full
raster image.
PST
BLK