First, you will apply sinusoidal inputs to the motor, adjusting the frequency manually, and measuring the output amplitude and phase.
|Set the function generator to sinusoidal waveform.|
|Set the frequency to 0.2Hz|
|Set the time scale on the oscilloscope so that one or two full periods of the sinusoid are on the screen.|
|Use the cursors to measure the output amplitude.|
|Use the time cursors to measure the time difference between a valley of the input sinusoid and the closest valley of the output sinusoid.|
|Print this screen.|
Take the data in the following (just amplitude and delay), adjusting the input frequency and the time scale on the oscilloscope as appropriate. Print at least one more screen at a higher frequency, such as 10 or 20Hz as shown below.
Next- Automated Spectrum Analyzer and Writeup