Grass Valley PVTV NEWS Rev.4.02 - Manual (Page 87)

A-1 STUDIO NEWS
Appendix A - Operational Rules
5-Frame Rule
•
Always place at least 5 frames between DVE
objects on the Transition Macro timeline.
• Bus prep occurs 5 frames before a DVE
begins. If a DVE is placed closer than 5
frames to another DVE, bus prep for the sec-
ond DVE will begin before the first DVE is fin-
ished.
Exception #1. DVE objects with the same bus
settings can be placed closer together on the
timeline.
Search/Play Rule
•
On the Transition Macro timeline, place
enough time between a VTR Search and a
VTR Play command to give the VTR ade-
quate time to locate the tape segment spec-
ifed in the Search command.
• To provide this time, either place enough
physical space between objects on the time-
line, or place a Step Mark between the
objects.
Audio Cross-fade Rule
•
If an audio cross-fade that has a command on
the timeline that references the fade destina-
tion instead of the source, the command will
invert the cross-fade.
Example . A Cross-fade down from A to B is set
up. (A is the source, B is the destination). Then
an audio command that references B is placed on
the timeline, the result will be a cross-fade up
from B to A.
Audio Recall Rule
When a Transition Macro (.MAC) file is opened,
each audio channel automatically "defaluts" to its
Preset 1.
Preroll Rule
The following rule applies to both audio and DVE
commands on the Transition Macro Timeline:
•
Generally it is best to place 1-5 frames
(depending upon the decks) before an audio/
DVE command on the Transition Macro time-
line. This allows the deck enough time to
start rolling before engaging the audio/DVE.