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How to calibrate DAC gain & linearity on 6052

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I currently have an algorithm and the correct register level code to calibrate a 6035 completely. I tried to extend this to the 6052 board accorind to the E Series RLP book, but i cannot seem to get the DAC Gain or Linearity caldacs programmed correctly. The register map indicates they are the same 8 bit caldacs as for instance the offset registers, but when i program them, the dac output does not seem to change.

I have successfully calibrated the ADC on the board, and the DAC offset, so i know that the rest of it is more than likely working correctly.
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Write a C program using Ni-DAQ, and step through the asm to see what it does. Needle in a haystack, but the needle is in there...

Can you get an oscilloscope on those registers?
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