Crystal Vision
Card edge operation
26
DEC102SUser ManualV1.0 05/11/03
Setting gain and black level
Use rotary switch (SEL) positions 0 to 4 and the shaft encoder to change the following:
•
Luminance gain and offset (black level)
•
Chrominance gains
The gain and offset adjustments are independent for 8 and 10 bit modes as well as
Composite and Y/C modes. For example, if the unit is set up in 10 bit mode and
subsequently adjusted in 8 bit mode, the 10 bit adjustments are maintained and will be
restored when 10 bit operation is resumed.
There are effectively four sets of independent gain and offset adjustments; 8 bit
composite, 10 bit composite, 8 bit Y/C and 10 bit Y/C.
SEL
Display Text Description
0
Ygain% 100
The shaft encoder can be used to adjust the luminance gain
1
Yoff+mV 3
The shaft encoder can be used to adjust the luminance offset (black level)
2
CGain% 100
The shaft encoder can be used to adjust both the U and V chrominance gains
3
Ugain% 100
The shaft encoder can be used to adjust the U chrominance gain
4
Vgain% 100
The shaft encoder can be used to adjust the V chrominance gain
Note:
The displayed number varies as the shaft encoder is rotated to give an indication of the
setting relative to the factory default
Select position 0 (Ygain) with the 'SEL' control to allow the shaft encoder to adjust the
luminance gain from 0 to 200%.
Select position 1 (Yoff) with the 'SEL' control to allow the shaft encoder to adjust the
black level from –30 to +385mV.
Select position 2 (Cgain) with the 'SEL' control to allow the shaft encoder to adjust the
overall chrominance gain from 0 to 200%.
Select position 3 (Ugain) with the 'SEL' control to allow the shaft encoder to adjust the U
chrominance gain from 0 to 200%.
Select position 4 (Vgain) with the 'SEL' control to allow the shaft encoder to adjust the V
chrominance gain from 0 to 200%.
