1. Test overview.

This test is used to verify that the light emitted by te IR source is picked up on the IR CCD (Uses the green channel of the CCD).
The software will switch on the IR source and the IR CCD will receive a signal which determines if the test is passed or not.
If there is a problem on the IR CCD it could cause ADDR system not to work correctly.

2. Test conditions.

This test relates only to the scanner only.
No film carrier must be inserted in the scanner to carry out this test.
No film is necessary for this test.
The acceptance of the test is automatic.
No parameter is saved.

3. Pre-requirements.

None.

4. Test realisation.

Click on "RUN" to carry out the test . The scanner will switch on the IR source.
The IR CCD will measure the value and will display the results in the form or a red curve representing the IR signal across the whole of the CCD.

5. Test acceptance.

The red curve corresponds to the signal seen by the CCD IR.
The cyan curves correspond to the higher and lower limits , as well as to the ideal signal.
The CCD here is at the horizontal one: the top of the CCD is on the left, bottom on the right.

Pattern: the red curve must be between the lower and higher cyan curves.
Score before adjustment: The average of the red curve must lie between 62 and 185.
Minimum: the minimum of the red curve must be higher than 1.
Maximum: the maximum of the red curve must be lower than 212.
Dynamic: the ratio max / Min must be red lower than 64.
Noise: must be lower than 5.
Dust: dust.
Wave

The test is passed if all these criteria are correct.
The signal average may decrease slightly due to the heating up of the IR source

6. Other affected tests.

If the signal is slightly outside tolerances, none of the tests will be really affected. On the other hand, if the IR signal is zero, the following tests will not be work:

xxx Pre-Scan IR.
xxx Ratio RGB-IR.
xxx Scan IR.
xxx Cal Encoder 2.
xxx Cal RGB IR.
xxx ADDR.

xxx corresponding to the film carrier.

7. Trouble shooting.

If the signal is zero : this means that the source IR does not give out any light or that the CCD IR is failing. Check the connection of the source IR and the IR CCD.

If the signal is above the higher tolerance level : as long as the signal is not saturated (i.e. it does not reach the top of the graph), this is not serious and the scanner can remain as it is.
If not, lower the IR signal. For that, if the scanner has an adjustable support POC, start the test Cal POC Adjustment.

If the signal is below the lower tolerance level : this means that the signal emitted by the IR source is unsufficient. For this, if the scanner has an adjustable POCsupport, start the test Cal POC Adjustment.

If not try to bring apart or closer the LEDS of the IR card.
By default, change the IR card.