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Alvium USB Cameras User Guide V3.6.4
Triggering
Ignored triggers
Alvium 1800 U-500m/c, U-501m NIR, U-1240 m/c, and U-2050m/c
Changing parameters while acquisition is active leads to ignored triggers until the
parameters get active.
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 106: Triggering conditions and results
TriggerSelector values for rolling shutter (RS) cameras
Cameras with rolling shutter (RS)
can
be triggered using
AcquistionStart
,
AcquisitionEnd
, or
FrameStart
for
TriggerSelector
.
Cameras with rolling shutter (RS)
cannot
be triggered using
ExposureStart
or
ExposureEnd
for
TriggerSelector
.
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.
