Grass Valley DD35 Family v.3.1.5 - Manual (Page 51)

2. Panel Operation DD35 Production Switcher
2 – 17 Operating Instructions – Rev. 16 / 10.2001
2.4.2 BACKGROUND B
The Background B bus source is selected and indicated on the Background Pre-
set B bus bank. Pressing another button in this bank selects a new source. No addi-
tional action is performed.
In Non-Layer mode, the Background B bus is the Preset bus. The background
image for the next BGD transition is selected on it. Usually this can be previewed
on the stage’s preview output.
Program and Preset bus operate in Flip-Flop mode, i.e. after the BGD transition,
the preset and program sources will change automatically.
In Layer mode, the Background B bus is the bus of the key BGD-B – similar to
the standard key buses Key 1 and Key 2. I.e. the key selection mode of the Keyers
Panel (Key Bus, Couple, Split) applies.
2.4.3 PRE-PROCESSED SIGNAL SELECTION GROUP
Each M/E stage of the switcher has the capability to send one processed key signal
and one processed video signal to the internal router. The signals can be taken
from any background or key.
For example: Key 1 is in chroma key mode DynaChrome. Then the processed key
output is the black-and-white key signal, the processed video signal is the fore-
ground signal with key color subtracted.
Button group in the Aux panel section:
Key2
PGM
Key3 Key1
Preset
M/E1 M/E2 M/E3 P/P
A B
Button Preset B PGM A Key1 Key2 Key3
1
associated Video Bus B Bus A Fill of Key1 Fill of Key2 Fill of Key3
associated Key
– non-layer mode:
– layer mode:
full image white
Key of BGD B full image white
Key of BGD A
Key of Key1 Key of Key2 Key of Key3
1 Only in stages with three keyers.