Grass Valley DD35 Family v.3.1.5 - Manual (Page 36)

2. Panel Operation DD35 Production Switcher
2 – 2 Operating Instructions – Rev. 16 / 10.2001
2.2 SOURCE SELECTION
The DD35 Series Production Switcher are equipped with 32 (standard), 48 or 62
serial digital inputs, each usable as a video or key signal. The following internal sig-
nals are also available:
D
Black, White
D
3 color backgrounds (Col1, Col2, Col3)
D
Video store (optional)
D
Montage processor (optional)
D
Re-entry from M/E1, M/E2, M/E3
D
Re-entry of Program/Preset and “Clean Feed”
D
16 “virtual” inputs with key memory (any normal input with secondary input cor-
rection)
D
Layer mode: the combined key signals of M/E1, M/E2 or M/E3.
Note: M/Ex cannot be selected as a picture source
When selecting the source, it may happen that the switcher levels M/E1, M/E2,
M/E3 or P/P cannot be re-entered as a source in another switcher level. This is not
a fault, but a protective mechanism to avoid loops and consequently timing prob-
lems. In this case, the switcher system prevents that close loops are built when se-
lecting the busses. For instance, in level M/E3, M/E1 cannot be selected when in
one of the most different combination paths the source M/E3 has been already se-
lected in level M/E1.
Find and disconnect the connention which prevent the picture source from being
re-entered. Beside the direct selection via the source buttons, there is a number
of internal connections which are not recognizable at the first sight.
Selection of the mask bus can be looked up in the Mask menu and all the other ones
(PGM, PST, Key, Fill) in the Status menu.
Re-entry problem
Solution