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Hi, I've a PXI-7841R (FPGA). My VI needs to send the derivative of a sine wave (volts) to an external card and acquire a sine wave input (velocity) that I have to integrate. The sine wave later become with two harmonics. When the frequency is too high, I notice aliasing problems and the sine's derivative amplitude and integral are not exact. Checking with simulink, for example with a sinusoid of amplitude 1, the integral should have amplitude 2 and the derivative 1. I have attached a screenshot of simulink and VI simple to check if the integral and the derivative values are corrected, by changing the frequency. Any help would be appreciated. Regards dev int simulate - Copia.vi
