Tektronix Grass Valley 3000 - Manual (Page 164)

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Section 4— Switcher Operations
9. For keying from a black on white source, select Keyer INVERT .
For keying from a white on black source, leave INVERT off.
10. To mask parts of the key that you don’t want to see, select
INH MASK and select either a box wipe pattern, or a video
source to serve as the mask source. Use the mask control
knobs on the Masks Subpanel (
LEFT/RIGHT/TOP/BOTTOM )
when adjusting the box mask.
11. To use a wipe, select either Primary or Secondary wipe on the
Mask Subpanel. Use the PRESET SIZE knob on the Wipe
Subpanel to adjust the wipe size.
12. To use a video source, select MASK BUS on the Mask
Subpanel. Select the source by delegating it to the Mask Bus
(on the PVW/AUX Bus Delegate row of buttons).
13. Use TOP/GAIN and BOTTOM/CLIP (active when the MASK BUS
button on the Masks Subpanel is selected) knobs on the Masks
Subpanel to adjust the mask source as you would adjust a key
source.
14. The following adjustments are made on the Keyer Subpanel.
To put a border on the key, select a Borderline (option must be
installed on keyer) key edge mode:
BORDER , SHADOW ,
EXTRUDE , or OUTLINE . To position the edge, adjust the SIZE/
POS Knob. Set brightness with the OPACITY Knob. To set the
edge color, use the Matte Subpanel controls.
15. To clear a border mode to its default position and color, hold
the crosspoint button down and press CLEAR WORK BUFR . To
turn off the border modes, creating an unbordered key, select
NORMAL edge mode.