Dalsa Dalsa DS-4x-06M18, User'S Manual And Reference

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6M18 Camera User’s Manual 25
DALSA 03-32-10017-03
board can be adjusted with a single command set. Adjusting all four ADC channels requires four
command sets. The value is calculated according to the following equation:
Value
≅≅≅≅
32768
××××
log10(Gain)
Where
1
≤≤≤≤
Gain
≤≤≤≤
10
Example: Set ADC Channel B to 5x Gain
Use these command/value pairs set the camera to 5x gain (you must write both MSB and LSB
values).
Value
≅≅≅≅
32768
××××
log10(5)
Value = 22903
= 5977h
Write MSB Write LSB
Command Value Command Value
Binary 0000 0111 0101 1001 0000 0110 0111 0111
Hex 07h 59h 06h 77h
Reading User Gain from ADC Channel C
To read the gain setting from the camera, use these commands:
Read
MSB Read LSB
Binary 0101 0011 0101 0010
Hex 53 52
Note:
At any gain setting, the CCD imager is subject to blooming when it is over illuminated. To
remedy over illumination, reduce the integration time or select a higher f-stop value
3.6 Automatic Offset Control (AOC)
The AOC defines the digitized value of black for the camera. An ideal camera (no dark current, no
shot noise, etc.) in total darkness produces an image with all pixels equal to the AOC set point
value. This command allows you to control the AOC set point of the ADC video board. The two
ADC video boards in the 6M18 can each be controlled independently. Both channels on the single
board will be affected. Normally both boards are controlled with the same set point value. The
default value is 50 DN, or counts.
Example: Set ADC Board 1 (Channel A & B) AOC Set Point to 32
DNs
Value = 32
= 20h
Command Value
Binary 0000 1010 0010 0000