Ect263

ECT263 iLab Activity - Linear and non-linear spectrum analysis using MultiSim

Filename convention: When you complete the answer sheet template document for submission, rename it “firstinitiallastnameLINMS1.doc” (Example: jsmithLINMS1.doc) then submit it to the “iLab Activity (Lin – Non-lin Signals)” dropbox.

Build the following circuit (Fig. 1) using Multisim.

Figure 1

This is a pure sinewave source with an amplitude of 10VP and a frequency of 1000 Hz.

Double-click on the oscilloscope and then double-click on the spectrum analyzer to maximize their displays.

Set the spectrum analyzer for a start frequency of 0Hz and an end frequency of 10 kHz. Press <Enter> on the analyzer control panel.

Set the analyzer's resolution frequency to 50Hz the Range to "Lin" (linear) and 2V/div.

Begin the simulation:

Either switch the 0/1 switch in the upper right-hand corner, or select <Run> from the "Simulate" pull-down menu. You may also need to click "Start" on the analyzer itself.

Hint: If you click the “Reverse” button on the analyzer, it will turn the background from black to white making the display easier to read.

Run the circuit and capture the analyzer's display using the Print Screen feature of Windows to copy the entire screen to the clipboard. You can then paste it to Paint and copy just the part of the image that you want to LINMS1.doc Word document template. You will use this template to submit your results to the DEP dropbox.

* Capture the image of the spectrum analyzer display and paste it into the answer sheet template (LINMS1 answer sheet.doc) for submission.

Repeat the above, after rebuilding the circuit with a diode between V1 and R1. Inserting the diode will cause rectification and thus distortion. Distortion creates harmonics. We want to view and measure the amplitude and frequency of each of these harmonics created by distorting the sine wave by the non-linear diode.

Figure 2

Figure 3

Use the marker to...