Lab+Report+Unit+6

Here's the final product

I was actually gonna do the aim. I don't really have the time to do the conclusion. Will you send a message on facebook if you can't do it. -Ashley

cant remember if i was doing these 2 or conclusion, sorry Ashley! and then ill print it all out tonight!

The aim of this experiment was to become familiar with the oscilloscope and to see the changes in the DC Current, AC Current, and various waveforms such as the square wave, sawtooth wave, and lissajous figures. As well as observing changes in the frequencies.
 * __ Aim: __**

Begin by turning on the oscilloscope and allow it to warm up and set up the controllers accordingly. Next on the DC current, turn the SEC/DIV knob counterclockwise before the X-Y mode and the the linear signal traveling across the screen turns into a spot and move it vertically or horizontally. Now rotate the SEC/DIV knob clockwise slowly until you see the solid horizontal line again. For the AC current connect the black cord to the terminal on the Function Generator. Press the correct buttons and choose a frequency in the range between 50 Hz and 100Hz then connect the generator using the Patch Cables to the Oscilloscope. Turn the SEC/DIV knob counterclockwise until you can only see one spot moving up and down and move it horizontally and vertically. Rotate the knob slowly until the spot runs from left to right while still moving up and down. Continue to increase the SEC/DIV until the spot becomes a wave. Set up a frequency equal to the 60Hz and press the sine wave button and record the changes on the screen. The frequency can be measured by calculating how many divisions there are in one sine period and use the formula which should leave you with an answer close to 60Hz. To observe the various waveforms change the Oscilloscope to DC mode on CH 1 to adjust the controls to have many cycles on the screen. Sketch the wave seen and label the horizontal and vertical scales. That is the Square wave. For the sawtooth press the sawtooth button and do the same. Observe the Lissajous Figures by using CH1 input for the second sinusoidal signal, the shape depends on the relative frequency, amplitude, and phase of X and Y signals. Next connect one function generator to CH1 and the other to CH2 and use the sine wave option for both with the frequency being 500 range. Now switch the mode to both and use the SEC/DIV knob to get a still picture. Now turn the vertical position for CH2 to see two sine waves with different amplitudes. Now draw the image on the right side. Switch the mode to norm to ch2 invert to change the polarity of ch2 signal to opposite.
 * __ Procedure: __**


 * Hey guys I have the graphs drawn out by hand on my paper. Should I just bring that in to lab next week and we staple it on the back for the rest of data analysis? FB me if there's any problems with this suggestion. -Andrew**

__UPDATE In case I don't make it to class tomorrow, I scanned the graphs for the lab and posted them below.__

__Data -**__ Answers to in-text questions: a.) Getting familiar with the knobs - -turning the position knob for CH 1, the trace moves up and down the y-axis. -nothing happens when the CH 2 knob is turned. Since we're only concerned with using CH 1, we change the trace position by adjusting CH 1 knobs. b.) Measuring frequencies - Time/DIV: # of miliseconds/division Volt/DIV: # of volts per division period = (Time/DIV) * 3 of divisions in 1 period

time = 5ms = 5*10^-3 sec 3.3 divisions/sine period f=1/T f=1/(3.3*0.005) = 60.6Hz

Different freqencies: Set 1: ratio 1:1 1 peak on graph f1 = 40 Hz f2 = 40 Hz

Set 2: ratio 1:2 2 peaks f1 = 40 Hz f2 = 80 Hz

Set 3: ratio 1:3 3 peaks f1 = 40 Hz f2 = 120 Hz

Set 4: ratio 2:3 1.5 peaks f1 = 80 Hz f2 = 120 Hz

SEE DRAWN GRAPHS ON ATTACHED PAGES.