50
Alvium USB Cameras User Guide V3.3.0
Specifications
ExposureMode = Timed
For all Alvium cameras, exposure time can be set by
ExposureTime
or
ExposureAuto
. For this,
ExposureMode
is set to
Timed
.
The selected exposure time is extended automatically:
•
If the selected exposure time does not match the available increment, the
camera automatically extends the exposure time to the next increment.
•
The
exposure time offset is included
in the selected exposure time.
ExposureMode = TriggerWidth or TriggerControlled
In addition, most global shutter (GS) cameras can control exposure time by the
trigger signal, with the
ExposureMode
set to
TriggerWidth
or
TriggerControlled
(using
ExposureStart
and
ExposureStop
).
The trigger controlled exposure time is extended automatically:
•
If the trigger controlled exposure time does not match the available increment,
the camera automatically extends the exposure time to the next increment.
•
Subsequently, the
exposure time offset is added
.
You can use
ExposureActive
to determine the duration of the exposure time
offset.
Typical operation
All timing values are based on following parameters:
•
Factory settings (camera after startup)
•
Minimum exposure time
•
Full resolution
•
Mono8 pixel format (also for color models)
•
Camera operation in freerun mode
•
Sensor readout using ADC bit depth
•
Without bandwidth limitations.
Bandwidth
: Data is measured for six steps in a range of 200 MBps to 375 MBps.
The default value for
DeviceLinkThroughputLimit
is 200 MBps for Alvium
1800 U cameras measured as average sensor readout.
Bit depth
: Values are measured for Mono8. If you are using color formats or 10-bit
or 12-bit pixel formats, frame rates fall below values for Mono8. increasing the
DeviceLinkThroughputLimit
value may increase maximum frame rates.