Offset And Gain Adjustments - Dalsa 4M30 User Manual

Falcon 4M Camera Manual

3.8 Offset and Gain Adjustments

Setting Analog Offset
Purpose:
Syntax:
Syntax Elements:
Notes:
Example:
Factory Calibrated Analog Gains
The camera has a factory calibrated analog gain setting. Adjustment of analog gain is not
available to the user, however, digital gain is available as set system gain
DALSA
Sets the analog offset.
sao t i
t
Tap selection. Allowable value is 0 for all taps.
i
Analog offset value. Extreme range is 0 - 511 but dynamic
range is dependent of the camera's current exposure mode
and gain settings. A value of 100 does not equal an offset of
100DN.
•
When flat field correction is enabled the expectation is that in
the dark the signal level is 0DN. Some users might required a
non-zero dark output. This can be achieved by increasing
analog offset.
•
Take care not to increase SAO too much with FFC enabled,
otherwise a PRNU-induced FPN pattern will result. Keep the
dark offset below 5 DN (10 bit).
•
The offset increases linearly with higher values.
•
Entering a large value offset will cause the camera to digitally
saturate the output image.
•
The resulting analog offset value depends on other camera
parameters such as temperature, frame rate, and exposure
mode.
•
The upper input limit of the offset remains the same regardless
of the exposure mode
sao 0 20
51
.
ssg
03-032-20044-01