ALLIED Vision Technologies Guppy PRO F-503 - Manual (Page 108)

Description of the data path
Guppy PRO Technical Manual V4.0.0
106
Manual gain
Guppy PRO cameras are equipped with a gain setting, allowing the gain to be
manually adjusted on the fly by means of a simple command register write.
The following ranges can be used when manually setting the gain for the ana-
log video signal:
Brightness (black level or offset)
It is possible to set the black level in the camera within the following ranges:
0 ... +16 grey values (@ 8 bit)
Increments are in 1/64 LSB (@ 8 bit)
Note

• Values can only be changed within the limits of gain
CSR.
• Changes in auto exposure register only have an effect
when auto gain is active.
• Auto exposure limits are 50..205. (SmartViewCtrl1
tab: Target grey level)
Type Range Range in dB Increment length
Guppy PRO CCD cameras 0 ... 680 0 ... 24.4 dB ~0.0359 dB/step
Guppy PRO F-503

(CMOS camera)
8 ... 32
33 ... 48
0 ... 12.04 dB
12.57 ... 18.06 dB
~0.125/step (1.02 - 0.28 dB/step)
~0.5/step (0.53 - 0.28 dB/step)
Table 45: Manual gain range of the various Guppy PRO types
Note

• Setting the gain does not change the offset (black
value)
• A higher gain produces greater image noise. This
reduces image quality. For this reason, try first to
increase the brightness, using the aperture of the cam-
era optics and/or longer shutter settings.
Note

• Setting the gain does not change the offset (black
value).