LabVIEW
FPGA Phase-Offset
Hello!
I work with the following hardware:
cRio 9054 Chassi
S-Series 9269 Analog Output Module
The cRio should work as a signal generator. Three signals are to be generated with a phase offset of 120 degrees each.
The signal frequency is increased with a fixed iterations f={1Hz, 2Hz, .... 20kHz}. I generate the signals on the FPGA with the Sine Wave.VI.
The signal parameters are transferred via the Host.Vi (frequency, phase offset, amplitude). The 3 generated signals are output from the FPGA.
Now to the problem:
The phase offset of the signals varies. It does not remain constant at 120 degrees. I suspect that the problem lies in the parallel generation of the 3 signals. I am relatively new to programming on an FPGA and am not very familiar with timing problems. My first try was to seperate the generation functions in seperate loops. Is there a way to regulate the phase shift on the FPGA? Or how can the parallel processing be better utilized?
Many Thanks for Your help!
