ME345_Lecture_20

# ME345_Lecture_20 - M E 345 Spring 2008 Professor John M...

This preview shows pages 1–6. Sign up to view the full content.

M E 345 Spring 2008 Professor John M. Cimbala Lecture 20 02/29/2008 Today, we will : Do some example problems – analyzing the frequency content of a signal 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 If time, review the pdf module: Review of Basic Electronics Do some example problems – basic electronics Example Given : A voltage signal is sampled at two different sampling frequencies, 100 Hz and 160 Hz. The resulting frequency spectra are shown below: At f s = 100 Hz, two spikes appear in the frequency spectrum, at 20 and 40 Hz. f (Hz) Amplitude (volts) 0 4 2 1 3 0 20 40 At f s = 160 Hz, two spikes appear in the frequency spectrum, at 20 and 60 Hz. f (Hz) Amplitude (volts) 60 0 4 2 1 3 0 20 40 80 To do : Determine the frequencies most likely to actually be in the signal. Solution :

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Example Given : A voltage signal is sampled at three different sampling frequencies, 300 Hz, 600 Hz, and 1000 Hz. The resulting frequency spectra are shown below:

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 07/23/2008 for the course ME 345 taught by Professor Staff during the Spring '08 term at Penn State.

### Page1 / 6

ME345_Lecture_20 - M E 345 Spring 2008 Professor John M...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online