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Section 3 — Functional Description
Preview Module (064802) (Slot A15)
The Preview Module has several functions:
■ A dedicated preview output for each M/E
■ Preview Router – the Preview Module can route M/E 1 preview, M/E
2 preview, or any Crosspoint Module input onto the Switched Preview
Output Bus
■ Generates color black
■ Two color background generators (can do a wash between the two
backgrounds)
■ Generates eight test patterns (with split screen)
■ Generates four safe title patterns
■ Generates clipped mask and delayed mask
The video outputs are component serial digital video. The preview signals
are available on the Output Modules. The mask signals are available
internally. The other signals are available at the Crosspoint Module via the
Reentry Module.
The preview router section of the module will send one of the four router
inputs to the switched preview output bus. Before being sent to the selector
the signals are processed as follows:
■ M/E 1 preview and M/E 2 preview inputs are demultiplexed into Y
and C.
■ The input from the Crosspoint Module is deserialized and autotimed to
the other three inputs
Processors used:
■ The Preview Module uses the HOS Processor
Mask Mezzanine Board (064830)
The Mask Mezzanine Board mounts on the Preview Module and provides
clip, gain, and autotiming for the key masks.
Inputs:
■ Mask Bus
Outputs:
■ Dedicated Mask Bus Output
■ Clipped Mask Bus Re-entry