Basic Operation and FeaturesBasler A500k Series 3-31PRELIMINARY3.8 Digital ShiftThe “digital shift” feature allows you to change the group of bits that is output from the ADC. Usingthe digital shift feature will effectively multiply the output of the CMOS sensor by 2 times, 4 timesor 8 times. Section 3.8.1 describes how digital shift works.You can set digital shift using either the Camera Configuration Tool Plus (see Section 4.1) orbinary commands (see Section 4.2).3.8.1 How Digital Shift WorksNo ShiftAs mentioned in Section 3.1, the A500k uses 10 bitADCs to digitize the output from the CMOS sensor. Thecamera drops the least two significant bits from theADC and transmits the 8 most significant bits (bit 9through bit 2).Shift OnceWhen the camera is set to shift once, the output fromthe camera will include bit 8 through bit 1 from theADC.The result of shifting once is that the output of thecamera is effectively doubled. For example, assumethat the camera is set for no shift, that it is viewing auniform white target and that under these conditionsthe reading for the brightest pixel is 20. If we changedthe digital shift setting to shift once, the reading wouldincrease to 40.* 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 withno digital shift are all below 128.bit9bit8bit7bit6bit5bit4bit3bit2bit1bit0MSBLSBADCNot Shiftedbit9bit8bit7bit6bit5bit4bit3bit2bit1bit0MSBLSBADCShifted Once
