Microscan MS-4Xi User Manual page 68

Calibration Options
Disabled (Shutter Speed)
When this feature is disabled, the shutter speed is fixed and is not part of the calibration
process.
Enabled (Shutter Speed)
When this feature is enabled, shutter speed will be calibrated to provide the best possible
image quality and performance.
Fast Shutter
The calibration process will concentrate on achieving the fastest possible shutter setting that
will still provide good performance. The image quality or contrast may not be as good as
what would be achieved with the Enabled setting. The calibration process is not designed to
choose the fastest shutter speed that can decode a symbol, but rather to optimize for the
fastest shutter speed that still provides good image quality.
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MS-4Xi Imager User's Manual