Tool/software:
Firstly, when testing the internal square wave, the values of the square wave signal were+1.36mV and -2.37mV, respectively, instead of the standard+1.875 and -1.875mV. Set the MUXn [2:0] of CHnSET to 001 for internal noise short-circuit testing, and the measured noise value is -0.5mV. Then, when testing the external signal, I grounded the p-terminal and n-terminal of the channel, and the measured value was around -0.47mv. May I ask what caused this? How should I solve this problem. I would be extremely grateful if a solution could be provided.
