SVS-Vistek EC02 Series, Manual, Page: 43 / 131

SVS-VISTEK
Feature-Set 43
7.1.12 Gain
Setting gain above 0 dB (default) is another way to boost the signal
coming from the sensor. Especially useful for low light conditions.
Setting Gain amplifies the signal of individual or binned pixels before the
ADC.
Referring to Photography adding gain corresponds to increasing ISO.
add 6 dB double ISO value
6 dB 400 ISO
12 dB 800 ISO
18 dB 1600 ISO
24 dB 3200 ISO
Figure 30: Table of dB and corresponding ISO
NOTICE
Gain also amplifies the sensor’s noise. Therefore, gain
should be last choice for increasing image brightness.
Modifying gain will not change the camera’s dynamic
range.
Figure 31: noise caused by too much gain
Auto Gain
For automatic adjustment of Gain please refer to Auto Luminance .
Please note, with CMV4000 sensors gain adjustment is possible in steps
only. Please find step values are as below.
When using autogain with steps of gain the non-continous gain
adjustment might be visible in final image. Depending on your
application it might be preferrable to use fixed gain values instead and
modify exposure with exposure time.
Steps of Gain
CMV4000
0 dB
1.6 dB
2.9 dB
4.1 dB
6.0 dB
7.6 dB
8.9 dB
10.1 dB
(reduces Dynamic
to 52 dB)