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Altera_Forum
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14 years ago

Unwanted frequency shift in DA-converted signal

Hi, i use Matlab/Simulink and DSP Builder for my project. In Matlab, I generate a digital source signal and program it in a LUT-Block in Simulink. This Block then sends the data to my DACs...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

That also came to my mind. It's just not possible to have continuous signals for all frequencies. But I hope the reason for the shift is something else.

There is no check that the phase of the signal at the end is correct (concerning to the next step, the start). There definitly is a not continous state when the LUT switches from end to start again - at least for some of the frequencies.