U
SER
M
ANUAL
C
OLOR
–
R
EV
I
–
09/2016
P
A G E
|
30
7.7
Gains and Offsets
GenCP address
ASCII
command
GenICam
command
Size R/W Description
0x12200
pamp
GainAbs GainSelector
= AnalogAll
4
RW
Pre-amplifier gain to:
0 : x1
1 : x2
2 : x4
0x12204
gain
GainAbs GainSelector =
GainAll
4
RW Digital gain from 0dB (0) to +8dB (6193) step
0.002dB
0x12208
gdig
GainAbs GainSelector =
DigitalAll
4
RW Contrast expansion (digital gain) from 0dB (0)
to +14dB (255) step 0.135dB (1)
0x1220C
offs
BlackLevelRaw
BlackLevelSelector =All
4
RW Common black level from -4096 to 4095 step
1
Analog Gain in the ADC
The only analog Gain available in the is located at the sensor level, in the ADC converter.
This “Preamp Gain” is in fact a variation of the ramp of the comparator of the ADC.
Then 3 Values are available : x1, x2 and x4. A gain x1 in a 12 bits conversion is equivalent to x4 in
10 bits.
OUT
Sensor
X
Preamp
Gain
X
White Balance Gains
Red
Green
red
Green
blue
Blue
+
X
FFC
Offset Gain
X
FFC
Adjust
FPGA
Sensor
Action on whole line
Action per pixel
Action per Color
X
Amp
Gain
X
X
X
Contrast Expansion
Offset Gain
+
X
x1
x2
x4
LSB
FWC
Comparator Ramps
at different Gains
Clamp (Black
Ref)
1024
electrons
4096
x1
x2
x4