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PSDs and Parseval's theorem

PSDs and Parseval's theorem
  1. What does parseval's theorem tell us?
  2. What is PSD and CSD?
  3. What is PSD in AFM?
  4. What does a PSD plot show?

What does parseval's theorem tell us?

Parseval's Theorem states that the total energy computed in the time domain must equal the total energy computed in the frequency domain. It is a statement of conservation of energy.

What is PSD and CSD?

Similar to the PSD, the CSD is a function of frequency. However, the CSD is used to describe a relationship between two signals, whereas the PSD is limited to one signal. Still, the CSD and PSD are equivalent in some instances.

What is PSD in AFM?

The power spectral density (PSD) of AFM data provides a more thorough description of the topography than a single-value roughness measurement.

What does a PSD plot show?

Power spectral density function (PSD) shows the strength of the variations(energy) as a function of frequency. In other words, it shows at which frequencies variations are strong and at which frequencies variations are weak.

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