Tektronix Grass Valley 3000 - Manual (Page 35)

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Description of Options
Safe Title/Action Area Generator
The Safe Title/Action Area Generator provides up to four
different patterns that can be superimposed on the switched
preview output of the switcher. It may be used to define a safe title
area, safe action area, or for screen centering and horizontal/
vertical alignment of picture elements.
Mix/Effects Clean Feed
A clean feed output of the wipe/mix signals (the two background
bus video signals without any keys added) is provided by a Look-
Ahead Preview mezzanine board installed on the Mixer and
Primary Wipe Generator module.
Frame Store
The Frame Store option allows storage and retrieval of images at
a resolution of 10 bits. Either two two-field pictures and keys or
one four-field picture and key can be frozen in the Frame Store. A
two-field mask store is also provided.
Effects Send
Effects Send provides a method of integrating digital effects
devices into the switcher mix/effects system. Up to four send
channels can be used to route the video and key from an M/E to
and from an external digital effects system.