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CPP100
SECTION 1
CPP1OPS
25/10/06
www.snellwilcox.com
Version 1 Issue 6
1.4
Composite inputs are decoded using an adaptive field-based comb-decoder and passed down the backplane
to the pre-processor card as separated luminance and multiplexed U/V. Up to two composite loop through
inputs can be applied simultaneously to the unit with switch selection between them on the decoder.
The optional ‘Golden gate’ decoder has the facilities to decode digital composite inputs in serial or parallel
format.
In addition to composite inputs, up to two serial digital component (SMPTE259M-C) inputs can be applied
directly to the pre-processor. Source switching between digital inputs is accomplished on the pre-processor
card.
An analogue loop-through reference may also be applied to the pre-processor card if the output is required to
be synchronised to a station reference. External communication is via a serial network (described more fully
later) connection to the pre-processor card. Internal communication is facilitated by a conventional CPU bus
link (address/data, ALE, WR, RD) between the three cards.
Filtered data sent from the pre-processor is formatted and the video output is then serialised into a
270Mbit/sec output as per SMPTE 259M-C.