Slide Scanner Repair Manual Diagnostics and Troubleshooting
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Changes to IPT Test Since LabVIEW Version 3.1 (Summary)
Table 5-5 list and explains the changes to the IPT Test.
Table 5-6. Changes to IPT Test
Test Change Explanation
Initialization Added This test was added to test initial configuration and circuit operation.
GMT Angle Modified Now checks for angle as well as position of the GMT target’s origin.
MagnificationChanged The separate magnification test in Version 3 has been eliminated from
the test suite to reduce scan cycles.
A reading of horizontal magnification is derived, tested, and reported as
part of the Distortion test.
Vertical magnification is no longer tested, but the constraints in the
Color Registration tests insure a tight control on vertical magnification
through the aspect ratio.
Uniformity Changed The old target based Uniformity Test has been replaced by Uniformity II
to provide statistical information about the uncorrected dark and light
non-uniformity of the slide scanner.
Dark Noise Changed The old target based Noise Test has been replaced by Dark Noise II
to provide statistical and Fourier noise performance of dark response.
The new test analyzes the slide scanner performance for noise and
steaks in the dark. It differs from the Uniformity Test in that it deals
with fulluniformity corrected data, while the Uniformity Test works with
uncorrected data.
Negative No Change
Calibration
Error Changed Test results are automatically stored in a spreadsheet format file folder
Reporting named Polaroid Test Results. A single row in the spreadsheet is given
to each run of a test. The data is compatible with MS Excel.
CCD New An upgrade is added to the test to improve the setting and reporting of
Configuration the CCD Configuration. The CCD Configuration setting is the code
written into the slide scanner’s EEPROM which allows it to tell the host
software which generation of CCD is in the unit. The test was
implemented to distinguish units having an upgraded blue filter on the
CCD. The host software will select between two sets of film files based
on the configuration code.
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