Version 1.0 rev 14 Aug 2019
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Table 19 below shows a summary of constraints when operating in Global Shutter mode:
Table 19: Global Shutter mode triggering constraints.
Global Shutter Triggering Modes
Exposure Range
Max
Trigger
Jitter
Min
Trigger
Pulse
Width
Fast
Exposure
Switching
Internal
User settable exposure time
and Cycle time
Short Exp: 8 Rows
to (1 Frame + 20
Rows)
Long Exp: 1 Frame
+ 21 rows to 3600 s
-
-
P
Internal 100% Duty Cycle
User settable exposure time
2 27 Rows
to 3600 s
-
-
P
External/Software
User settable exposure
Time. Cycle time controlled
via period of external
trigger pulse
Short Exp: 8 Rows
to 1 Frame + 20
Rows
Long Exp: 1 Frame
+ 21 Rows to 3600 s
1 Row
2 clks
P
External Exposure
Exposure time controlled
by width of external trigger
pulse. Cycle time controlled
via period of external
trigger pulse
1 Frame + 16 Rows
to 3600 s
1 Row
1 Frame +
4 Rows
External Exposure 100%
Duty Cycle
Exposure time controlled
by period of +ve edge of
external trigger pulses.
Cycle time is exposure time
2 26 Rows
to 600 s
2 clks
External Start
User settable exposure
time and Cycle time but
sequence initialized via
external trigger pulse
Short Exp: 8 Rows
to 1 Frame + 20
Rows
Long Exp: 1 Frame
+ 21 Rows to 3600 s
1 Row
2 clks
NOTES:
1. Exposure Time granularity for all modes is sensor row based so the exposure time in the dialog will always
be rounded to the nearest integer number of Row readout times.
2. 1 Row is the time taken to perform a full row readout (392 clock cycles).
3. 1 Frame is the image height rounded up to a multiple of 4. The frame readout time for any ROI can be
requested via the SDK3 (refer to SDK3 User Guide for details).