Chapter 6 Shutter Mode Operation 75
Continuous Cleans: Disabled
Shutter Type: Electronic Shutter
Trigger Polarity: Negative edge
Timing Modes and Cleans/Continuous Cleans
This section provides timing diagrams, grouped by timing mode, to further describe the
purpose and timing of clean cycles and continuous clean cycles. See Chapter 5, for general
information about Clean cycles and Continuous Cleans cycles.
Free Run
The timing diagram below is for an experiment set up to acquire three (3) images in Free
Run timing mode with normal shutter operation selected. In this diagram, clean cycles
occur before the first exposure and after the last readout period. They do not need to occur
between exposures since each readout cleans the array before the next exposure starts.
Figure 26. Clean Cycles in Free Run Operation
Note: The start of the exposure is signaled by the NOT SCAN output signal of the
connector going high but will not occur until the current clean cycle and the
additional user-defined number of cleans have finished. "Number of Cleans" is defined on
the Setup|Hardware Setup|Cleans/Skips tab page. If you enter a value other than "0",
you will further delay the start of the exposure by that number of clean cycles.
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