Grass Valley XtenDD v.4.2.4 - Manual (Page 77)

2. Panel Operation
2 – 48 Operating Instructions – Rev. 1 / 7.2002
2.7.11 KEY INVERSION
If you press Key inv, the key signal is inverted, i.e. the contents of foreground and
background are exchanged on the screen.
2.7.12 KEY MASKING
The mask selected in the Masks panel can be switched on with the Mask on button.
For further information please refer to the sections Masks Panel.
2.7.13 KEY PREVIEW
Look Ahead Preview Mode:
If no Key Preview is active, the Key PVW button will not be lit. If it is pressed, the
Color Preview will be switched on and the Key PVW button will be lit. Pressing this
button once more switches on the the BlackWhite Preview and the button will still
be lit. Pressing the button again switches off the Preview (no Key Preview for this
M/E will be active anymore) and the lamp in the button will go out.
It is always the Key Preview for the actually delegated keyer which is switched.
When re-delegating to another keyer, a possibly active preview of the previously
delegated keyer will be switched off. The preview of the newly delegated keyer will
also be switched of. When delegating to the same keyer (i.e. to that one which is
already active), nothing will happen, i.e. the preview state (Off, Color, BlackWhite)
is not changed.
Permanent Key Preview Mode
Holding down the PVW button switches into the Key Selection Mode (is deactivated
when the button is released again). By pressing the delegation buttons (Key1 ..
Key2) serving as selection buttons, the Key Selection Mode enables to select the
keyers whose preview has to be permanently displayed. It is possible to simulta-
neously select several keyers, the selection buttons have a toggle function. The
button of the selected keyers are lit in the Key Selection Mode.
If the Key Selection Mode not active, from the selection buttons only the button of
the actually delegated keyers will be lit. The buttons now serve again as delegation
buttons.
If not a single keyer is selected in the Key Selection Mode, the preview of the actu-
ally delegated keyers will be displayed (Auto Follow Mode).
If no key selection button was pressed while the Key Selection Mode was active,
the Preview Mode will be toggled after releasing the Key PVW button, and that be-
tween Color Preview (of the keyers being selected in the Key Selection Mode or
of the actual keyer, if Auto Follow Mode is active) and the BlackWhite Preview (of
the actually delegated keyer). If at least one selection button was pressed, the Pre-
view Mode does not change after releasing the Key PVW button.
In the Permanent Key Preview, the Key PVW button is always lit, i.e. at all delega-
tion whose keyers support a preview. In the specific case, this means that in the
M/E stage, the button is always lit at Key1 .. Key2 (regardless whether the actually
delegated keyer is somehow involved in the preview or not).