User:David J Weiss/Notebook/notes Oscilloscope

OSCILLOSCOPE

notes on experiment

In this lab the main focus is to get familar with the ocilloscope. The way to do this is to see how it works and how to use it. The means by witch we do this is by seeing how the insterminate functions in different modes and how changing the different functions changes the way data is changed.

safety

The safety concerns assocated with this lab are mostly electrical. The main concerns with this lab are that the equipment is functioning properly and that there is on damage to the assoicated power connections.

Equipment

The euuipment used in this lab is as follows: 1) Textronix TDS 1002 Two Channel Digital Storage Oscilloscope 2) 60 MHz 1GS/s Wavetek Sweep/Function Generator Model 180

Set Up

Set up of this lab was pretty basic. It involved pulgging in the Osilloscope as well as the Function Generator,and turning the power on both. After this you will need to connect the two with BCN connectors (BCN connectors are used on the ends of coaxil cabels to attach two peices of equipment) so that the Osilloscope can interprate the signals from the function generator.

Day One

On the first day of the lab I worked with Cristhian Carrillo and we basically were just trying to figure out how the equipment worked and tried to do the first couple of parts of the expernmnent, but we ran into some difficulty in getting the wave funtion to display properly and had to get some help from Dr. Koch and our T.A. Pranav Rathi who were expremely helpful in understainding how the equipment worked but as time was running out no data was recorded.

Day Two

On the secound day of the lab i woked with Elizabeth Allen. We set up the equipment and started doing the expernment. The first thing we did was to set up the wave funciton generator to produce a sine wave but we had some trouble due to the fact that the DC offset was shifted and had to adjust the wav of fit the screen. We then started to adjust the triggering functions and found that it controls where the wave is first displayed on the screen. when set to trigger within the waveform it stablized the wave and freezes it instead of having a continous function. we then changned the wave generator to produce square waves. these waves couuld be distored when we changed the coupling from ac to dc. the dc coupling function would display the square wave without any distprtion but when the coupling is set to ac coupling the wave is distored on the horizontal sections due to overshooting the peaks of the function. when we adjusted the the grid to display the region where the function was overshooting were able to measure the fall time of the wave.

Basic Waveform Measurment

We set the function generator to output a sine wave at 1KHz and tuned the frequency to 200Hz, then centered the wave on the grid with vertical grid divisions of 5.00V and horizontal grid of 5ms due to the chosen frequency. Estimating by sighting on the grid we found an amplitude of 6V. Using the Measure function gave us a Pk-Pk measurement of 11.8V. The cursor function opens a menu that allows to measure by time or voltage. On day three, using different equipment, I measured a sine function set up in a similar manner but with horizontal grid of 1ms, that displayed with a grid estimate of 1.4V, a cursor measurement of 1.4V and a Pk-Pk measurement of 1.4V. This was a good way to learn just where to set the cursors on the waveform to get the proper measurement.