THOMSON DD10, Installation Manual

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1. General Diamond digital
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1.2 SWITCHER ARCHITECTURE
The switchers are set up as A/B mixers in the background (BGND) with 1 or 2 over-
laid key layers for each mixing level. The next transition principle is consistently
realized and includes also the downstream key stage.
The mixing levels and the preset/program stage/downstream keyers are set up
with the same p.c. cards and do not differ in their hardwares.
For post-production, the mixing level of the switchers DD20 and DD30 can be
switched over to the layer mode. In this case, 2 keyers are available for chroma or
luminance key and 2 keyers for wipe signals.
The preview facilities (AUTO PREVIEW, TRANSITION PREVIEW) for preparing
the next contributions in the mixing levels are realized.
Integration of an external DVE unit into the signal path of the switcher is possible.
In this case, the signal path of the mixing level can be separated, the video signal
can be fed out to the DVE and the signal manipulated by the DVE can be looped
again into the signal path.
1.3 TV STANDARDS
The switcher processes without hardware modifications digital serial video signals
with the aspect ratios 4:3 and 16:9 (270 Mbits/s) in the standards 625 lines/50 Hz
2:1 interlaced and 525 lines/60 Hz 2:1 interlaced.