User`s manual

Spyder 3 GigE User Manual
03-032-10158-09 DALSA
70
Purpose: Sets the analog offset. The analog offset should be set so that it is
at least 3 times the rms noise value at the current gain. DALSA
configures the analog offset for the noise at the maximum
specified gain and as a result you should not need to adjust the
analog offset.
Syntax:
sao t i
Syntax Elements:
t
Tap selection. Use 0 for all taps or 1 to 2 for individual tap
selection if you are using the two tap model.
i
Offset value in a range from
0 to 255DN (12 bit LSB).
Notes:
• To return the current analog offset value, use the command
78Hgcp or 79Hget sao.
Example:
sao 2 35
Related Commands:
80Hcao
Calibrating Analog Offset
Purpose: Instead of manually setting the analog offset to a specific value,
the camera can determine appropriate offset values. This
command calculates and averages each tap’s pixels within the
region of interest and sets the offset to achieve the specified
average target value.
Syntax:
cao t i
Syntax Elements:
t
Tap selection. Use 0 for all taps or 1 to 2 for individual tap
selection if you are using the two tap model.
i
Average target value in a range from 1 to 255DN (12 bit
LSB).
Note: Due to the sensor dark current, the range of
operation of the
cao command is temperature and line rate
dependent. Lower
cao values cannot be achieved when
using lower line rates and higher temperatures. The camera
sends a warning message when this occurs.
Notes:
• Perform analog offset calibration before performing FPN and
PRNU coefficients.
• To return the current analog offset values, use the command
81Hgcp or 82Hget cao.
Example:
cao 1 50
Related Commands:
83Hsao
To update the analog gain reference:
Purpose: Sets the current analog gain setting to be the 0dB point. This is
useful after tap gain matching allowing you to change the gain on
all taps by the same amount.
Syntax:
ugr