Rolling Shutter Internal Triggering (Non-Overlap Mode)

Internal Trigger Mode allows the user to configure an exposure time and cycle time. For Internal Triggering Non-overlap mode, the exact acquisition sequence depends on the exposure time and cycle time set as shown in Rolling Shutter Internal Triggering. The following diagrams show the behaviour of TTL outputs ‘Fire’, Fire n’, ‘Fire ALL’ and ‘Fire ANY’.

Fire ALL indicates the time period within a frame during which all rows are exposing simultaneously.

Fire ANY indicates the time period within a frame during which any row is exposing.

Initially, the entire sensor is held in a global clear state to ensure that there is no charge build-up on the sensor. Global Clear goes LOW and a frame read out is initiated. This frame is discarded as it does not contain the correct exposure period. Reading out a frame effectively begins a new exposure. When the exposure period has completed, a signal frame read out phase begins. When the frame has been read out completely, the Global Clear is held HIGH until the user-defined cycle time is achieved.

Rolling Shutter Internal Triggering

Rolling Shutter Internal Triggering (Long Exposures) Timing Parameters

Parameter	Minimum	Maximum
Exposure	1 Row	30 s
Cycle Time (1/Frame Rate)	Exposure + 1 Frame + 1 Row	20,000 s
Acquisition Start Delay	-	1 Row