Grass Valley M-2100 - Manual (Page 51)

MMCP Installation/Operation Manual 2-27
Keyer Controls and Operation
3. The key cuts on or off air.
Previewing the Key
As long as the key signal is synchronous with background video, it is dis-
played along with the preset background source on the Look-Ahead-
Preview (LAP) monitor under any of the following conditions:
■ Keyer Select button tallies high; Next Transition Key button active; key not
on air. (Key status LED indicator off),
■ Key on air (LED indicator lights green); Keyer Select button off; Next Tran-
sition Key button active, and
■ Key on air (LED indicator lights green); Keyer Select button off or high
tally; Next Transition Key button off.
Non-Synchronous Key
If the key video signal is not synchronous with the intended background
video, the key indicator LED will light red and that key cannot be selected.
If an on-air key becomes non-synchronous, it is removed from air. The key
indicator LED will light red and the
Key Select button will go off.
Modifying Keys
Keys can be modified using the following modifier buttons on the Keyer
Control subpanel (
Figure 2-11 on page 2-24 ):
■ Brdr (Border)
■ VIDEO/Matte ,
■ SELF/EXT , and
■ LIN (Linear) or LUM (Luminance).
Keys can be modified using the following potentiometer knobs on the
Keyer Control subpanel (
Figure 2-11 on page 2-24 ):
■ Hue/Clip ,
■ Saturation/Gain , and
■ Brightness/Opacity .
The Hue/Clip , Saturation/Gain , and Brightness/Opacity share the same controls.
The top functions, Hue, Saturation and Brightness, on each knob are
accessed by pressing the
Mode/Function button and making an adjustment
with the knob while the button is held down.
Keys can only be modified when in modifier mode as defined below.