1. Test overview.

The scanner has two light sources and two sensors CCD. A source and a sensor CCD capture an RGB image and a source and a sensor dedicated to the IR image. That implies that at one point, the two CCD do not capt the same portion of image. This test allows the calibration of this difference.
For that, the scanner will scan a long film and will determine, for each top encoder, the shift between a RGB image and the IR image.
If the calibration of the encoder 2 is incorrect, the ADDR cannot function to its optimal capacity, even creating non existing correction.

2. Conditions of the test.

This test relates to the 120 film carrier inserted in the scanner.
The 120 film carrier must be inserted in the scanner to carry out this test.
The long B&W Film must be used for this test (ref 070 100 312A) :
The acceptance of the test is automatic.
The values of each top encoder are saved in the file cod120.ini.

3. Requirements.

• Test 120 Cal play is accepted to ensure that the play of the gears is correctly taken into account.
• Test 120 Sharpness-CoeffG is accepted to ensure that sharpness is optimal.
• Test 120 Ratio RGB-IR is accepted to ensure that the RGB and IR images are of the same size.

4. Réalisation du test.

Click on RUN to execute the test. A window will be displayed requiring the long B&W film to be inserted (watch for the direction of the film), click on OK.
The scanner will scan the film totally.
At the end of the scanning, a curve will be displayed representing the gap between the IR and RGB positions of each top encoder. If the test is accepted the file cod120.ini is created.
Caution : Do not move the scanner during the scanning the film.

5. Acceptance of the test.

Too complex to define.

6. Other affected tests.

• Test 120 Cal RGB-IR.
• Test 120 ADDR.

7. Trouble shooting.

• If the test fails with the message "too much peaks and waves" : Clean the gears of the film carrier to eliminate dust and scratches which could disturb the precision in the advance of the film.
• If the test fails with the message "Invalid raw coefficient" : Try to remake the test with another film (clean and new).
• If the test fails with the message "Cannot Write Final Coefficients File" : the file cod120 is in reading mode only .Desactivate the reading mode only and to redo the test.