User:Manuel Franco Jr./Notebook/Physics Lab 307/Notes for Osc. lab
Notes for myself
- I found out that the frequency i had it on was too low, and I could not get the sine graph. But i fixed it.
- An increase in voltage increased the amplitude.
- The frequency setting determines the period of the wave.
- Increase in frequency decreases period.
- Using the measuring button is handy, b/c it measures freq., period, mean, and many other things all depending on the voltage and the frequency set on the func. gen. It can also have several measurement on display.
My first sine graph
- Peak to peak : 1.60 V
- (max to min): 780mV to -780mV
- Freq.: 961.5 Hz
- Period: 1.040 ms
1.) So in order to increase Amp. I increase the volts, and the data came out to be so:
- Peak to peak : 4 V
- (Max to Min 'based on cursor'): 2V to -2V
- Freq.: 1.03 kHz
- Period: 974 s---? micro
2.) Low amp. I decrease volts. 'lowest voltage on the func. gen.
- Peak to peak : 616 mV
- (Max to Min 'based on cursor'): 304mV to -304mV
- Freq.: 975.5 ?Hz micro
- Period: 1.025 ms
Triggering So the question is: 'Common way to trigger is on a rising edge (what does this mean?). What happens to the signal when you use different triggers? Be able to explain this orally.' So what I'm getting this is, based off of wiki and Mr. Young, that the trigger function is used to measure data on the table more precise. Starting at a starting point and to an ending point, such as at t=0 to t=10. Triggering enables the user to move along back and forth in those times of the wave.
There are different functions for triggering such as pulse/video/edge. Edge does what is said above. As for video it sets the wave in motion depending on if it is "rising" or "falling." Pulse is more of an unknown thing for me....
AC Coupling Thinking... So the instructions say to apply a large DC voltage I have about 12V. And I've decreased the frequency substantially down to about (X1 2.0 Hz)whatever that means? The comparison is that the DC keeps a max voltage most of the time, but for AC that's not the case. Once it hit's max voltage, it exponentiates downward to V=0. The answer to avoid ripples is edge mode, i guess.
Okay, so the increase in the DC voltage increases the amplitude, just as the Amplitude does.
Fall time: 54.5 ms Fall time cal.: 45.1 ms Fall time w/ cursor: 49.6 ms Rise time: 32.5 micro sec.
The difference in the cal. time to the cursor is that it's a little lower.