Basler L100k User Manual
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Operation and Features3-24 BASLER L100k SeriesDRAFT3.7 Digital ShiftThe “digital shift” feature allows you to change the group of bits that is output from each ADC.Using the digital shift feature will effectively multiply the output of the camera by 2 times, 4 timesor 8 times. Section 3.7.1 describes how digital shift works when the camera is operating in a 10bit output mode and Section 3.7.2 describes how digital shift works when the camera is operatingin an 8 bit output mode.Please note the precautions you must observe to effectively use this feature (see Section 3.7.3).You can set digital shift using either the Camera Configuration Tool Plus (see Section 4.1) orbinary commands (see Section 4.2).With the Camera Configuration Tool Plus, you use the Digital Shift setting in the Output parametergroup.With binary commands you use the Digital Shift command.3.7.1 Digital Shift in 10 bit Output ModeNo ShiftAs mentioned in Section 3.1, the L100k uses 10 bitADCs to digitize the output from the CCD sensor.When the camera is operating in 10 bit outputmode, by default, the camera transmits the 10 bitsthat are output from each ADC.Shift OnceWhen the camera is set to shift once, the outputfrom the camera will include bit 8 through bit 0 fromeach ADC along with a zero as an LSB.The result of shifting once is that the output of thecamera is effectively doubled. For example,assume that the camera is set for no shift, that it isviewing a uniform white target, and that under theseconditions the reading for the brightest pixel is 100.If you changed the digital shift setting to shift once,the reading would increase to 200.* Note that if bit 9 is set to 1, all of the other bits will automatically be set to 1. Thismeans that you should only use the shift once setting when your pixel readings in10 bit mode with no digital shift are all below 512.Since the shift once setting requires that the least significant bit is always a "0" andnever a "1", no odd gray values can be output. The gray value scale will only includegray values of 2, 4, 6 and so forth. The absence of gray values is commonly referredto as "Missing Codes".bit9bit8bit7bit6bit5bit4bit3bit2bit1bit0MSBLSBADCNot Shifted“0”bit9bit8bit7bit6bit5bit4bit3bit2bit1bit0MSBLSBADCShifted Once |
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