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Description of the data path

STINGRAY Technical Manual V2.2.0

106

Manual gain

Stingray 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 gray values (@ 8 bit)

Increments are in 1/16 LSB (@ 8 bit)

The IIDC register brightness at offset 800h is used for this purpose.

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

Stingray color cameras 0 ... 680 0 ... 24.4 dB

~0.0359 dB/step

Stingray b/w cameras 0 ... 680 0 ... 24.4 dB

Table 39: Manual gain range of the various Stingray 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).

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