Grass Valley LGK-3901 - Manual (Page 65)

GUIDE TO INSTALLATION AND OPERATION
LGK-3901/DSK-3901 | 59
6.4.2.2 Keyer Control
The Cut buttons are clicked once to arm a cut transition (either up or down), and then clicked again to disarm the cut.
The Fade buttons are clicked once to arm a fade transition (either up or down), and then clicked again to disarm the
fade. Only one button type can be armed at any one time for any given keying layer.
Whenever a transition is armed the appropriate border color inverts to reflect
the arm state. A second click disarms the button and its color changes back to
its normal monitor state.
This figure shows the state of the Control Panel when:
• DSK 1 is up and armed to cut transition down
• DSK 2 is down and armed to fade transition up over 60 fields
As soon as any keyer is armed the TAKE button immediately activates (becomes red). Clicking on the TAKE button
then commences the armed transition(s)
6.4.2.3 Emergency Recovery
In the case of an on-air emergency, there are two actions that can be taken:
• All Keys Off
o This button causes all keyers to be cut down immediately
o This button is always active (red) and is not affected by the TAKE button
• FTB
o This button causes the most downstream keyer to be faded to black over the associated rate
o The FTB button becomes red when active. Clicking it again fades the most downstream keyer from
black so that the Program Output is seen again.
6.4.3 Preview
The Preview panel allows selections for the Preview Input and Preview Output to be monitored and controlled.
The selected states are reflected in the Show Signal Path dialog (see section 6.4.8)
Note: Details of Preview Input and Output selections are covered in section 4.9.1.