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2.6.2.10 Rolling Shutter Global Clear External/Software Triggering (Non-
Overlap Mode) - Zyla 4.2 Only
In this section, both External and Software Trigger are described in the same diagram as the acquisition
sequence is the same. The trigger event can either be from the EXT Trigger input or sent via software. While
waiting on the trigger event, the sensor is held in a Global Clear State which ensures that charge build up on
the sensor is kept to a minimum while waiting for the trigger event. The ARM signal is asserted to indicate it is
ready to detect an incoming trigger input. Once the trigger event is detected, Global Clear goes LOW a signal
frame read out phase begins.
When the required exposure period for Row 1 has completed, a signal frame rolling shutter readout phase
begins. When the frame has been read out completely, the Global Clear is held HIGH until the next trigger
event is detected.
The external trigger is fed via the EXT Trigger input on the I/O Connector on the camera head.
Figure 24: Rolling Shutter Global Clear External/Software Triggering (Non-Overlap Mode) - Zyla 4.2
Table 19:
Rolling Shutter Global Clear External/Software Triggering (Non-Overlap Mode) Timing Parameters-
Zyla 4.2
Parameter
Minimum
Maximum
Exposure*
1 Frame + 1 Row
30s
Cycle Time (1/Frame Rate)
Ex 1 Frame + 5 Rows
-
External Start Delay
0
1 Row
EXT Trig Pulse Width
2 Sensor Speed Clock Cycles
-
*The exposure time reported is the exposure time for ROW 1 and the period for which FIRE ALL is HIGH.
Summary of Contents for Zyla sCMOS 4.2 PLUS
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