THOMSON LDK 200, Technical Manual

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4-4 Technical Manual LDK 200 - Camera Head Adjustments
Video ADC Automatic Calibration
The following is an automatic internal calibration procedure to adjust the analogue-digital convertors.
(There are not pre-conditions for this calibration.)
a. In the menu system select the Service menu.
b. Select Calibrations.
c. Select Video ADC and run the procedure.
Sawtooth Calibration
The following is an automatic internal calibration procedure to adjust the internal gain of the DVP board.
(There are not pre-conditions for this calibration.)
a. In the menu system select the Service menu.
b. Select Calibrations.
c. Select Sawtooth and run the procedure.
Pre-processor Calibration
The following is an automatic internal calibration procedure to adjust the analogue-digital convertors.
(There are not pre-conditions for this calibration.)
a. In the menu system select the Service menu.
b. Select Calibrations.
c. Select PreProc and run the procedure.
White Shading Adjustment
The following is an adjustment procedure to correct the white shading introduced by the lens.
a. Recall the standard factory file.
b. Shoot the white PortaPattern test chart illuminated with a 3200k spotlight (80% video).
c. Set gain to 0 dB, gamma to linear and run the auto white balance process.
d. Defocus.
e. In the menu system select the Video menu.
f. Select Shading.
g. View the waveform monitor and adjust the level, parabolic, and sawtooth adjustments for each colour in turn.