Tektronix Camcorder 2200 User Manual

2-79

Aux bus pair 4A/4B can be used to supply inputs to the frame 
store video and key channels.

Video and key outputs from the frame store are routed to the 
switcher crosspoint matrix and may be used as primary switcher 
inputs. The video and key outputs are also routed to an output 
module for use by external devices.

If the frame store is not in Freeze mode, its output is delayed by 
2 fields from its input.

Video and key can be frozen either separately or simultaneously 
through the use of panel controls. In addition, the system has 
read-before-write capability, so stills can be layered in a recursive 
manner. The system accomplishes this by sending the output of 
the frame store to the input of an M/E for combination with 
another image. A composite is generated that can be fed back to 
the input of the frame store and re-frozen.

The

and

buttons select whether the Frame 

Store Subpanel is assigned to the video channel or key channel. 
One of these buttons is always lit.

and

may 

be selected simultaneously.

Operations that can be independently set for video and key 
channels are as follows:

■

Freeze

■

Grab

■

Field 1 and Field 2