Triggering
189
Alvium CSI-2 Cameras User Guide V2.6.2
Trigger delay with 1500 C-120 cameras
If sensor related parameters are changed
directly before
sending an external
trigger, the trigger delay can be increased. This relates to
Figure 81: Triggering rolling shutter (RS) cameras
No
Conditions
Results
1
Exposure time is shorter than readout time.
Trigger 1 starts exposure 1 with a delay
2
Exposure time is shorter than readout time, but
longer
than for exposure 1.
Trigger 2 starts exposure 2 with a delay
shorter
than for exposure 1.
3
Exposure time is longer than readout time
Trigger 3 starts exposure time without a delay.
Because the
exposure area
is longer, also the
readout area
is longer than for triggers 1 and 2
4
Exposure area
is ongoing.
Trigger 4 is ignored.
5
Readout area
is ongoing
Trigger 5 is ignored.
6
Readout area
is finished. Exposure time is
longer than readout time.
Trigger 6 starts exposure 6 without a delay
Table 94: Triggering conditions and results
Frame rates in triggered mode
When rolling shutter cameras are operated in triggered mode, the values for
maximum frame rate reached in free run mode are cut in half.
External signal
1
2
3
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4
5
6
1
1
2
2
3
3
Readout area
Exposure area
Delay
П
Delay
П
Idle
Readout area
Exposure area
Readout area
Exposure area
П
Exposure start delay
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Sensor cycle state
