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# lab 2 - MAE 3113 MEASUREMENTS AND INSTRUMENTATIONS SPRING...

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MAE 3113 MEASUREMENTS AND INSTRUMENTATIONS SPRING 2006 Report Due 1 week Lab 2 Frequency and Phase Response of RC Circuits (Passive Filters) Introduction: Since most signals produced by a mechanical process are not ‘pure’ in waveform, there is a need to filter out the unwanted part – noise/drift. To accomplish this, passive filters can be used to condition the signal to remove any unwanted part. Objective: The purpose of this lab is to learn to develop a passive filter to condition an incoming signal. The passive filters that will be introduced are: Low-pass High-pass Two-Stage Low-Pass Filter In this lab you will need to: 1. Design and build the following RC: a. High-pass filter with a cutoff frequency between 20 and 70kHz b. Low-pass filter with the same cutoff frequency as the above Measure the following for both the input and output waveforms at four or five points above and below cutoff frequency: 1. Frequency 2. Voltage Peak-to-Peak 3. Phase shift (To measure phase shift make sure Quick Measure is on source 1 then scroll to the Phase shift) 4. Any changes in the shape of the waveform (To see this you will need to input either a square or triangle waveform) You should also determine the overall filter characteristics. This can be done by finding the ratio of the input to output voltage and then plotted

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lab 2 - MAE 3113 MEASUREMENTS AND INSTRUMENTATIONS SPRING...

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