Tektronix Camcorder 2200 Manual Do Utilizador

2-23

If either knob is adjusted away from unity, the

 button 

lights in addition to the

 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. 

When gain and clip are returned to unity, the

 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

 

button a second time while it is lit. This action restores unity and 
turns off the

 button lamp.

The

 button selects a luminance key that has variable clip 

and gain adjustment and S-shaping of the key signal. Key 

 

(offset) and 

 (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). 

A menu selection is available that switches a chroma trap into the 
key path to remove unwanted chroma from video used for 
keying.

Pressing the

 button delegates the chroma keyer 

subpanel to that M/E. (The

 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.

 does not function with 

background keyers (layered mode). 

Pressing the Primary 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 

 and 

 knobs are non-functional when this mode is 

selected.