Tektronix Camcorder 2200 User Manual
2-23
Keyer Areas
If either knob is adjusted away from unity, the
LUM KEY
button
lights in addition to the
LINear KEY
button lamp. Both buttons
illuminated indicates to the operator that a linear key is being
performed with non-unity gain and/or clip. If the key memory
feature is enabled in a software menu, the non-unity setting is
recalled whenever the input associated with this setting is
selected.
performed with non-unity gain and/or clip. If the key memory
feature is enabled in a software menu, the non-unity setting is
recalled whenever the input associated with this setting is
selected.
When gain and clip are returned to unity, the
LUM KEY
button
lamp goes off. Since it is difficult to adjust the knobs back to exact
unity, the unity values can be forced by pressing the
unity, the unity values can be forced by pressing the
LIN KEY
button a second time while it is lit. This action restores unity and
turns off the
turns off the
LUM KEY
button lamp.
The
LUM KEY
button selects a luminance key that has variable clip
and gain adjustment and S-shaping of the key signal. Key
(CLIP)
(offset) and
(GAIN)
(amplitude) settings are remembered for each
source. Six Clip and Gain values are saved: three for the video key
and three for the Auto Select button (LUM, CHROMA KEY, and
LINEAR).
and three for the Auto Select button (LUM, CHROMA KEY, and
LINEAR).
A menu selection is available that switches a chroma trap into the
key path to remove unwanted chroma from video used for
keying.
key path to remove unwanted chroma from video used for
keying.
Pressing the
CHROMA KEY
button delegates the chroma keyer
subpanel to that M/E. (The
CHROMA KEY
button is functional
only when the chroma keyer option is installed.) Refer to the
chroma keyer subpanel description later in this section for details
on chroma keyer operation.
chroma keyer subpanel description later in this section for details
on chroma keyer operation.
CHROMA KEY
does not function with
background keyers (layered mode).
Pressing the Primary Preset Pattern
PRI PRESET PATTERN
button
selects the output of the primary (transition) wipe generator as the
key source. Pattern adjustment is done in the wipe subpanel (see
the wipe subpanel description later in this section for details). The
key
key source. Pattern adjustment is done in the wipe subpanel (see
the wipe subpanel description later in this section for details). The
key
(CLIP)
and
(GAIN)
knobs are non-functional when this mode is
selected.
Lum
Key
Chroma
Key
Key
Pri
Preset
Pattern
Preset
Pattern