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Masks Subpanel
SEC WIPE selects the secondary (optional) wipe generator to
produce the mask. The secondary wipe generator in the same
M/E provides the mask signal. If the secondary wipe option is not
installed, the pattern shape and position are the same as the
primary wipe generator. Pattern size and edge softness are still
independent of the primary wipe mask source.
MASK BUS selects a video source to generate the mask. The mask
bus is a dedicated video bus in the primary matrix accessed with
a bus delegate button in the Aux Bus Subpanel of the panel. The
mask bus permits any primary or re-entered input to be used as a
mask source. A clip and gain circuit in the mask generator
processes the selected video input for display in the mask. When
MASK BUS
is selected, the (TOP/GAIN) knob becomes a gain
control and the (BOTTOM/CLIP) knob becomes a clip control.
Mask Controls
Several knobs and one button on the masks subpanel control the
size and edge characteristics of the mask.
An edge of the mask cannot be moved past the edge of the raster
or past the opposite mask edge. On a box mask, as one edge is
adjusted to reach the opposite mask edge or the edge of the raster,
the control function stops and the knob beeps. Turning the knob
in the other direction then shows the mask edge.
The Mask (TOP/GAIN) and (BOTTOM/CLIP) knobs function only as
gain and clip controls when the mask source is delegated to the
Mask bus. The clip and gain-adjusted Mask bus can be frozen in
the mask frame store (or mask store).
Sec
Wipe
Mask
Bus