NED
XCM20125GIG
UME-0041-01
36
At Digital Gain=1 and Pixel Correction Mode = Factory White, the relation of
analog gain and sensitivity is illustrated below:
Table 4-4-1 Gain-Sensitivity
analog gain
Sensitivity
V/(lx・s)
1
x1(0dB)
50
2
x2(6dB)
100
3
x4(12dB)
200
4
x8(18dB)
400
5
x10(20dB)
500
6
x12(22dB)
600
7
x20(26dB)
1000
The digital gain multiplication factor can be calculated as follows:
Digital Gain register value: val (0~511), gain multiplication factor: gain (1~2)
gain = 2047 / (2047 - val * 2)
val = 2047 * (gain - 1)/(gain * 2)
Notes:
Gain and noise values are proportionally related. Adjust amount of gain in
accordance with the requirements of your camera system.
4.5 Setting Offset
The offset can be adjusted. It is possible to set it in the adjustable range of
–60~60(DN) when 10bit is output –15~15(DN) when 8bit is output.
Figure 4-5-1
Digital Offset register
（
the GigEGrab picture
）
