Rev 13 May 2013 17:57 | Page 12
Adjust the amplitude of the input signal so that the fundamental is at the desired level. Examine
1.
the Fund Power reading in the left panel of the VisualAnalog Graph - AD9253 FFT window
Figure 12. Graph
Window of VisualAnalog
Repeat this procedure for Channel B, Channel C, and Channel D.
2.
Click the disk icon within the VisualAnalog Graph - AD9253 FFT window to save the
3.
performance plot data as a .csv formatted file. See Figure 13 for an example.
Troubleshooting Tips
If the FFT plot appears abnormal, do the following:
If you see an abnormal noise floor, go to the ADCBase0 tab of the SPIController window and
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toggle the Chip Power Mode in MODES(8) from Chip Run to Reset and back.
If you see a normal noise floor when you disconnect the signal generator from the analog input, be
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