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Troubleshooting Frequency Response Estimation

When to Troubleshoot

If, after analyzing your frequency response estimation, the frequency response plot does not match the expected behavior of your system, you can use the time response and FFT plots to help you improve the results.

If your estimation is slow or you run out of memory during estimation, see Managing Estimation Speed and Memory.

Time Response Not at Steady State

 What Does This Mean?

 How Do I Fix It?

FFT Contains Large Harmonics at Frequencies Other than the Input Signal Frequency

 What Does This Mean?

 How Do I Fix It?

Time Response Grows Without Bound

 What Does This Mean?

 How Do I Fix It?

Time Response Is Discontinuous or Zero

 What Does This Mean?

 How Do I Fix It?

Time Response Is Noisy

 What Does This Mean?

 How Do I Fix It?

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