Grass Valley M-2100 - Manual (Page 44)

2-20 MMCP Installation/Operation Manual
Section 2 — System Operations
Holding the Key button down can have special effects, as described in
Cutting Keys On or Off Air on page 2-26 . (If a Key-cut occurs, releasing the Key
button does not change its tally.)
Preroll Transitions
A preroll transition causes Preset sources to begin prerolls (if configured),
then transition to the Program bus. Preroll transitions can be triggered by
pressing the
PreRoll/Transition button ( Figure 2-8 ) or by selecting a crosspoint
that has been configured with a preroll enable.
Figure 2-8. PreRoll/TransitionButton
The PreRoll Transition button tallies three conditions:
■ Full brightness — Transition in progress,
■ Half brightness — One of the selected Preset sources has been config-
ured with a preroll time, and
■ Off — No selected Preset source has been configured with a preroll
time.
There are several scenarios involving the use of the PreRoll/Transition button
and the transition type selected as described in the following headings:
First Press Transitions
■ Begins a preroll (if any).
■ Makes a Preset bus-to-Program bus transition (no preroll), or at the end
of the preroll interval.
PreRoll
Transition
Transition
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