GRASS VALLEY INDIGO, User Manual

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168 INDIGO AV Mixer User Manual
Glossary
Multiplier
A control circuit in which a control signal is
multiplied with one or more input video sig-
nals. The resulting video output level varies
from full on to full off according to the state
of the control signal.
O
Object
An individual functional area of a system,
typically one of several having similar capa-
bilities.
P
Pattern Border
A variable width border that occurs at the
edges of a wipe pattern.
PFL (Pre Fade Listen)
Monitoring audio before level adjustments
with the audio channel faders. Used to check
the input audio.
PGM (Program signal output)
The final video and audio signals from this
system, after the application of the effects.
The video seen by viewers.
Phase Invert
A switch in the audio channel. It inverts the
polarity of the signal to correct for balanced
lines and mics that are wired backwards.
May in some cases improve sound if signals
are out of phase.
Pixel
A picture element. A pixel is a digital sample
of the luminance and color values of a pic-
ture at a single point.
Point of Use
A location in the system where a resource is
used. A resource is generally used at differ-
ent locations at different times. However,
with some resources it is possible to use the
same resource at different locations at the
same time.
Post-Fader
A term used to describe an aux send (or other
output) that is connected so that it is affected
by the setting of the associated channel fader.
Pre-Fader
A term to describe an aux send (or other out-
put) that is connected so that it is not affected
by the setting of the associated channel fader.
Preset Bus
A row of source buttons used to select the
source that will be output by the M/E during
the next background transition.
Preset Pattern
A key effect in which a wipe pattern that has
been preset to a desired size and location is
used to cut the key hole. The characteristics
of the pattern are set using pattern controls.
Preview
A video signal that is viewed before it is out-
put by the switcher. See also
Look Ahead Pre-
view and Switched Preview .
Program Bus
A row of source buttons used to select the
source for the current output of the M/E.
Programmable Clean Feed
A type of clean feed where different keys can
be selected for inclusion or exclusion from
the clean feed.