Grass Valley DD10 part 1 - Manual (Page 19)

2.3 DVE Panel Diamond digital DD10
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Mode 1
FX Loop
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If the DVE transition type key is actuated, DVE is selected as transition for a picture
component. In this case the assigned DVE device is controlled automatically and
the video and key signal is switched to the DVE device for the respective picture
component. The Loop mode is enabled automatically.
Note: In order to assign the DVE transition mode to a different picture com-
ponent, a different transition type, e.g. Mix or Wipe must be selected
for the original picture component. If DVE transition is selected, it is
not possible to change the transition component as is usual e.g. with
the Mix or Wipe transition.
It is particularly important to monitor this particularity when working
with a DD5 switcher as there are no displays above the keys for pic-
ture component.
If DVE is used as background transition, it is possible to select whether the signal is
to be switched to the DVE from the Background or the Preset bus. This selection
permits a determination of the type of transition.
Key Preset ON: new picture comes in
Key BGD* ON: old picture goes out
* With some devices this key is designated PGM.
If the function (key) Loop is disabled, only the DVE key signal is switched to the
DVE, not the video signal. This way, a DVE effect may also be used as wipe effect
without manipulating the video signal.
In this mode 1 (FX Loop), the DVE is only switched into the signal path during the
transition.
Note: It is possible to deviate from the automatically switched video and
key signals and to switch other signals. However, this may result in
partly peculiar pictures.