Vision Operator's Manual (v12.0 MD) Glossary of Terms • GT–3
Tally — An indicator which illuminates when the associated button, or control, is selected or is
on-air.
Termination — A means of closing a circuit by connecting a resistive load to it. In video
systems, a termination is typically a 75 ohm resistive load.
Transition — A controlled change from one video input to another video input or black. The
change can occur through a wipe, cut, dissolve or “DVE Send” effect.
Transition Preview — A transition seen only on the preview monitor. It may be observed and
adjusted without disturbing the program or “on-air” output.
Video — The electrical signal produced by a camera, character generator or other image source.
The signal amplitude varies in relation to the tonal scale from black to white presented at the
source. White produces the highest amplitude; black produces the lowest signal amplitude.
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