GE_OEC_9600_C-Arms

Image System Calibration 39
PIXEL/COLUMN FILTER PCB ADJUSTMENTS
This adjustment is for systems that have the Pixel/Column Filter PCB on the camera
assembly. The adjustments are performed to correct for any shading differences that
appear as “columns” in the image.
Procedure
1. Verify the Monitor Test Pattern is removed by pressing ESC four times.
2. Set switch SW2 (coarse pixel adjustment - 1 pixel steps) on the Pixel/Column Filter
PCB, as shown in Figure 34, to match the switch SW2 (horizontal centering) setting
on the CCD camera.
R1
PIXEL/COLUMN
FILTER PCB
SW1
SW2
Figure 34 - Pixel/Column Filter Adjustments
3. Set switch SW1 (fine pixel adjustment - 1/2 pixel steps) on the Pixel/Column Filter
PCB to its nominal setting of 8.
4. Setup the system as follows:
• MANUAL FLUORO mode at 50 kV and 2.5 mA
• 1 copper filter in the beam
• MAG2 field size
• Adjust window to a value between 50-60
• Adjust level to a value between 60-80 until there is a gray field on the left monitor