10
3.
Depress the CALIB. push-button for more than 2 seconds in order to execute
automatic calibration. For several seconds, the ASD-111i will attempt to conform
the output 4:2:2 signal to the SMPTE 259M standard. During this time, the ERR
calibration LED will flicker. The flickering will stop automatically after a complete
and successful calibration. Both offset and gain levels for the current format are
automatically stored.
4.
If a particular parameter of the signal could not be calibrated, it will be indicated
by the ERR LED and the manual calibration LEDs. For example, if automatic
calibration failed to properly adjust Y gain, then the Y GAIN LED will be lit. Press
any push-button in order to cancel automatic calibration. No offset or gain levels
for the current format are stored.
Figure 3.3
Input signal sampling zones required during automatic calibration
White Yellow Cyan
Green Magenta
Red
Blue
Black
Y gain and B-Y gain
sampling zone
R-Y gain sampling zone
Y OFST (in setup format)
sampling zone
Y OFST (in non-setup format), B-Y OFST, and R-Y OFST sampled during blanking
3.5 Manual Calibration of Gain, Offset and Horizontal Centering
The manual calibration interface consists of the SELECT, +,
-
push-buttons and the
Y GAIN, Y OFST, B-Y GAIN, R-Y GAIN, and H
CENTER LEDs. The list of
adjustable parameters include G/Y offset, gain for G/Y, B/B-Y, and R/R-Y, and
horizontal centering. When a parameter is selected, its corresponding LED lights up.
After manual calibration is enabled, a 1 minute delay with no push-button selection
will automatically disable manual calibration. However, any changes made are
stored.
To manually calibrate the ASD-111i refer to the following steps.
