Spyder3 GigE Vision User Manual
03-032-20027-02 DALSA
70
Setting the Readout Mode
Use this command to clear out dark current charge in the vertical transfer gates immediately
before the sensor is read out.
ReadoutMode
Auto (0x0)
DarkCurrentClear (0x1)
ImmediateReadout (0x2)
Auto. Clears dark current below ~ 45% of the maximum line rate.
DarkCurrentClear. Always clears dark. Reduces the maximum line rate.
ImmediateReadout. Does not clear dark current. (Default mode.)
• The vertical transfer gates collect dark current during the line period. This collected
current is added to the pixel charge. The middle two red taps have more vertical transfer
gates and, therefore, more charge. This additional charge is especially noticeable at
slower line rates.
• If the user is in Exposure Modes 2: ExposureMode Timed and
LineTriggerMode Off (Internal), or 7: ExposureMode Off and
LineTriggerMode Off (Internal), and ReadoutMode ImmediateReadout,
with AcquisitionLineRateAbs at 45% of the maximum, and then ReadoutMode
DarkCurrentClear is selected, the following warning will be displayed, but the
AcquisitionLineRateAbs value will not be changed: Warning 09: Internal line rate
inconsistent with readout time> The effect in both internal and external line rate modes
is that an EXSYNC is skipped and, therefore, the output will be at least twice as bright.
• This value is saved with the camera settings.
Related Commands:
DALSAExposureMode, AcquisitionLineRateAbs
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