Crystal Vision
The CoCo Controller panel
CoCo104 User Manual R2.0
18
26/09/05
CoCo Controller panel – display menu
Where ‘vv’ is the overall video gain from 0 to 200, ‘yy’ is the chroma gain from 0 to 200
and ‘zz’ is the black level from -512 to +512.
If the CHROMA or BLACK knobs are altered, the control name text in the menu will be
highlighted by changing to capital letters.
To quickly return the highlighted variable to its default value, press the CAL button.
The following functions have dedicated rotary controls:
Control
Range
Description
VIDEO
0 - 200
Overall YUV gain – retains individual YUV gain offsets in proportion
CHROMA
0 - 200
Overall UV gain – retains individual UV gain offsets in proportion
BLACK
-512 - +512
Black level or lift
RED, GREEN, BLUE
0 - 200
Individual RGB component gain
Gamma
0.5 – 2.0
Overall RGB gamma
Wipe
Continuous
Variable split screen between input and output (Aux out only when enabled)
Note:
Overall video and chroma control range may be less than 0-200 if any YUV component gains
have been altered.
Using panel menus
The menu display is associated with four assignable buttons and an assignable rotary
control under the CAL button. When active, their associated LED will be lit.
For example, if the YUV GAIN button is pressed the following menu is displayed:
CoCo Controller panel – YUV GAIN display menu
In the example above, the programmable rotary control is assigned to control Y gain as
indicated by the fact that ‘Y’ is capitalised.
The Y gain can now be adjusted over its available range. If necessary the CAL button can
be pressed to return quickly to its default value.
