HI all, Simply I am doing frequency sweep. The attached photot has three graph, on the top left you can see I am getting - 16 dBm which is the same as I generated, on the right top graph is the FFT of each single step. the below graph shows the result of the power and frequency sweep of the total steps.I am getting some wrong values in AMPLITUDE after inserted them in FFT, I tried to add zero padding to make the FFT work to power of 2 but i still have the same problem.I have read that the problem beacuse of spectral leakage but I don't know how to overcome this problem. Any support? Thanks in advance Regards

LabVIEW

getting wrong amplitude in FFT

Author

Hi Lynn,

The time interval for the sweep is constant, and you can see it in the attached code, also I use different values of IQ rate but the problem still exisits. Thanks for your support

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LabVIEW

getting wrong amplitude in FFT

Re: getting wrong amplitude in FFT