Tektronix Camcorder 2200 Manual Do Utilizador

2-75

 selects the secondary (optional) wipe generator to 

produce the mask. The secondary wipe generator in the same 
M/E provides the mask signal. If the secondary wipe option is not 
installed, the pattern shape and position are the same as the 
primary wipe generator. Pattern size and edge softness are still 
independent of the primary wipe mask source.

 selects a video source to generate the mask. The mask 

bus is a dedicated video bus in the primary matrix accessed with 
a bus delegate button in the Aux Bus Subpanel of the panel. The 
mask bus permits any primary or re-entered input to be used as a 
mask source. A clip and gain circuit in the mask generator 
processes the selected video input for display in the mask. When

 is selected, the 

 knob becomes a gain 

control and the 

 knob becomes a clip control. 

Several knobs and one button on the masks subpanel control the 
size and edge characteristics of the mask. 

An edge of the mask cannot be moved past the edge of the raster 
or past the opposite mask edge. On a box mask, as one edge is 
adjusted to reach the opposite mask edge or the edge of the raster, 
the control function stops and the knob beeps. Turning the knob 
in the other direction then shows the mask edge.

The Mask 

 and 

 knobs function only as 

gain and clip controls when the mask source is delegated to the 
Mask bus. The clip and gain-adjusted Mask bus can be frozen in 
the mask frame store (or mask store).