User:Ryan P. Long/Notebook/Physics 307L/2009/08/24
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SJK 00:56, 15 September 2009 (EDT)![]() 00:56, 15 September 2009 (EDT) Overall, you have a very good primary lab notebook and lab summary. You can see the comments on these two pages, plus some comments on Tom's page to see what you can improve on. In addition to the good written work, I am liking the energy you and Tom have in the lab and your willingness to try out things with the wiki and the equipment. I like it! Equipment TypesSJK 00:51, 15 September 2009 (EDT)
Setting Up the the Oscilloscope
Wave MeasurementsFirst we take initial estimates of the amplitude using the boxed grid on the oscilloscope and estimated roughly 280mV.
We used the cursor (type: voltage) and the measure function on the oscilloscope to measure the wave amplitude more accurately, the result for both were 284mV. We repeated for several measurements, listed below..
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}} Oscilloscope TriggeringThere are multiple settings for the triggering on the oscilloscope, the wikipedia article about oscilloscopes outlines multiple types. One of the most common is the Rising edge setting. From the wikipedia article, the different types of triggers we used are summarized below.
AC CouplingAC coupling is the process in which the DC component of the signal is removed via capacitor. The DC component can act as an offset for the signal, resulting in a less clear display of the signal. Blocking the DC component results in a better display, thus resulting in better measurements. ![]() 00:54, 15 September 2009 (EDT) At this point (AC Coupling), you don't seem to have as much information recorded in your lab notebook as you did prior. I think this probably reflects the fact that you were not quite as sure of what you were doing. Definitely always try to take the time to write down as much details as possible, even when you're struggling to figure out the apparatus...it's usually going to help you out taking the time to write! Measuring Fall Time
where is the rise time. We calculated the RC constant to be 25.5 ms.
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