User:David E. Sosa/Notebook/Junior Lab/2008/09/08
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Oscilloscope Lab NotesSJK 02:14, 20 September 2008 (EDT)
I had some trouble at the beginning to set up the oscilloscope. Even though I had set up the signals correctly. I checked and saw the the coupling was incorrectly set up. It was on ground. So I moved it to AC.
Why is it not possible to measure less than 10 HZ? (Steve Koch:Not sure what happened: but it definitely is possible)
The graphs become less and less accurate as we go to higher frequencies.
Now time to measure stuff.
Now I find out that there 3 different ways for measuring the frequency and the voltage.
Counting the squares. Using the cursor Just using the measure feature included in the oscilloscope.
First Measurment of Sine wave. Freq 89 HZ Period 11.30 milliseconds. Fall time 3.370 milliseconds.
Fall time Measurment= 51.20 milliseconds.
Amplitude = 14 Volts time= 97.20 milliseconds V=Vfinal*exp(-t/tau)
.90=exp(-t/tau) Fall time. 51.20 milliseconds.
Now we solve for tau, which equals= R C
Oscilloscope Lab Summary
http://openwetware.org/wiki/Physics307L:Labs/Oscilloscope Oscilloscope Lab Instructions
fall time = 57.48ms
It is always the case that we realize our mistakes not when we are commiting them, but instead much later. The important things is not to fear mistakes but to learn from them as much as one can. So I decided to list a few of the things I think I could have done better and that are definitely going to improve in the following laboratories.
These are the things I will be concentrating in improving next lab.