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1M28 and 1M75 User's Manual
Camera Gain (Highgain)
A preprogrammed off-chip amplification of either 1x or 4x gain before AD conversion can
be applied. This gain allows one to get more information out of sparsely illuminated
scenes, or increases the spread of gray levels when using strong logarithmic compression.
Skimming Gain
This gain can amplify small signal levels before readout, thereby increasing sensitivity
before readout noise adds to the signal. Due to the thermally generated leakage current,
this gain is only suitable for relatively short exposure times since it significantly increases
the FPN created by thermal current. The skimming gain can be combined with LINLOG
response, though the LINLOG transition parameters have to be chosen carefully to
prevent blackout of the sensor. The skimming gain should not be used with very short
frame periods, since it has a slightly increased time constant.
Both gains can be combined, though this increases FPN significantly and usually requires
you to recalibrate the black level.
Figure 6: Skimming and Camera Gain
Signal
Note: In skimming mode increased responsivity results in a nonlinear output.
Note: Gain values are set using the PFRemote configuration tool. See section 3.2
PFRemote Configuration Tool for details.
DALSA
PRELIMINARY
Camera
Sensor
Skimming Gain
1x or 4x
Camera Gain
1x or 4x
13
03-32-00525-03
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