ME345_Lecture_16

# ME345_Lecture_16 - contains some electronic noise at 60 Hz...

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M E 345 Spring 2008 Professor John M. Cimbala Lecture 16 02/20/2008 Today, we will : Do another example problem – Aliasing and the Nyquist criterion Review the pdf module: Signal Reconstruction – the Cardinal Series Do C a n d y Q u e s t i o n s f o r C a n d y F r i d a y W e d n e s d a y (for Exam review) If time, review the pdf module: Spectral Analysis (Fourier Series) Example Given : A voltage signal contains frequency components at 150, 350, and 700 Hz. It also
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Unformatted text preview: contains some electronic noise at 60 Hz. We sample the data digitally at a sampling frequency of 400 Hz. To do : Is there any aliasing? If so, what frequencies will be see (perceive)? Solution : 0 0.2 0.4 0.6 0.8 1.0 f a / f folding f / f folding 2.0 2.2 2.4 2.6 2.8 3.0 4.0 1.2 1.4 1.6 1.8 5.0 4.4 4.6 4.2 4.8 3.4 3.6 3.2 3.8 f / f folding...
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