Instruction manual

Guppy PRO Technical ManualV4.1.0
90
Description of the data path
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 analog
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)
The IIDC register brightness at offset 800h is used for this purpose.
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 49: 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 camera optics and/
or longer shutter settings.
Note

• Setting the gain does not change the offset (black
value).