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3.4.4 - Keep Clean Cycles
iXon3 cameras have a range of different Keep Clean Cycles that are run depending on the actual model and the state
the camera is in. The rst keep clean cycle to be discussed is the one that runs while the camera is in an idle state, i.e.
waiting for the PC to tell it to start an acquisition sequence. We will then look at the keep clean cycle running during an
internal trigger kinetics series sequence. Finally, we will look at the keep clean cycle running while the camera is waiting
for an external trigger event to occur.
When the camera is idle, i.e. not actively capturing images, it is repeatedly running the Idle Keep Clean Cycle.
This cycle is composed of a vertical shift, followed by a series of horizontal shifts. The number of horizontal shifts is
dependent on the actual CCD.
When the Start command is received from the PC, the camera will complete the current keep clean cycle and then
perform a sufcient number of vertical shifts to ensure both Image and Storage regions are completely charge free, see
thegurebelow.Oncompletionofthissequencethecameraisreadytoruntheexposuresequence.Theexactexposure
sequence will depend on several factors including the trigger and the readout modes selected. These will be discussed
later in this document.
Features & Functionality
Figure 25: Idle Keep Clean Cycle
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