Basler A202k User Manual download pdf (Page 13)

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Basler A202k High Gain 7

DRAFT

4.1.2 Digital Shift With 8 Bit Output

No Shift

The A202k High Gain camera uses 10 bit ADCs to

digitize the output from the CCD sensor. When the

camera is operating in 8 bit output mode with no digital

shift, it drops the least two significant bits from each

ADC and transmits the 8 most significant bits (bit 9

through bit 2).

Shift Once

When the camera is set to shift once, the output from

the camera will include bit 8 through bit 1 from each

ADC.

The result of shifting once is that the output of the

camera is effectively doubled. For example, assume

that the camera is set for no shift, that it is viewing a

uniform white target and that under these conditions

the reading for the brightest pixel is 20. If you changed

the digital shift setting to shift once, the reading would

increase to 40.

Note that if bit 9, bit 8 or bit 7 is set to 1, all of the other bits will automatically be set

to 1. This means that you should only use the shift three times setting when your

pixel readings in 10 bit mode with no digital shift are all below 128.

Since the shift three times setting requires that the three least significant bits always

be "0", the gray value scale will only include every 8th gray value. For example, 8,

16, 24 and so forth.

Note that if bit 9 is set to 1, all of the other bits will automatically be set to 1. This

means that you should only use the shift once setting when your pixel readings in

8 bit mode with no digital shift are all below 128.

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Basler A202k User Manual Page 13