User:David E. Sosa/Notebook/Junior Lab/2008/09/08

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Oscilloscope Lab Notes

SJK 02:14, 20 September 2008 (EDT)
02:14, 20 September 2008 (EDT)
We are looking for a lot more notes and detail than you have in your notes here. You actually talk about this below, so it's good that you realize this. It think we should spend some time talking about this in person.

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

• Brief summary of what you did (linking to the lab manual page is OK)
```http://openwetware.org/wiki/Physics307L:Labs/Oscilloscope Oscilloscope Lab Instructions
```
1. Add links to all wiki pages that contain your notebook entries. This is likely only one page.
1. Report your value for the fall time using AC coupling.
```fall time = 57.48ms
```
• Include uncertainty in your measurement!
• Explain how you measured this (briefly)
1. What did you learn?
• It's OK if you didn't learn anything. But include things you are still finding confusing.
2. What did you explore outside of the standard lab procedure? Anything interesting?
3. What could make the lab better next year?
1. Things to improve in the next laboratory.

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.

• I think my notes could been much better. Frankly I am not really used to write everything in the computer. I now Dr. Koch want us to learn that skill, so I'll keep that in mind in the next lab.
• I did read a few of the sites Dr. Koch recommended about the oscilliscope. The truth is that I could have gotten a better knowledge of the machine before coming to the lab. I will also try to improve my preparation for the next lab.

These are the things I will be concentrating in improving next lab.