# I need help with Electromagnetic - Waves Pre lab sheet

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Znex56

Engineering

## Description

This lab is about Waves. Please solve the questions on the pre lab sheet.

Please solve the questions with detailed and clear steps.

Please solve the questions on a separate sheet and number each solution to the corresponding question.

Thank you ,,

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Laboratory #3 EE Science II Laboratory #3 Function Generators and Oscilloscopes Pre-Laboratory Assignment Your name and group number: _____________ 1. Read the lab summary and write down the objectives of the lab. [1 Point] 2. Define the following terms and indicate the SI units: [2.5 Points] a) Peak voltage b) Peak-to-peak voltage c) RMS voltage d) Frequency e) Time period 3. A signal is given by the expression y (t) = 3 cos (6π * 106 t ). [2.5 Points] a) What is the peak voltage of the signal? b) What is the peak to peak voltage? c) What is the RMS voltage? d) What is the radial frequency of the signal? e) What is the time period? 4. For the graph given in figure 1, determine the mathematical expression for the signal. [1 Point] Figure 1: Determine the mathematical expression for the signal (Question 4). 5. The mathematical expression for a certain signal is given as y(t) = VDC + Vp cos (2πft), where VDC is the DC offset, Vp is the peak voltage, and f is the frequency. Modify this expression if the signal has the following characteristics: a) Peak-to-peak voltage = 3 V b) Frequency = 50 Hz c) DC offset = 0.5 V Draw one period of this signal in the grid given in Figure 2. You can start this problem by filling in the table given below. Note: Your drawing only needs to be approximate. [3 Points – 1.5 for table + 1.5 for graph]  University of South Florida 1 EE203-pre-180113_Fall Laboratory #3 Time, t (ms) y (t) (volts) 0 2 5 8 10 12 15 18 20 3 Voltage ( in volts ) 2 1 0 -1 -2 -3 Time ( 2 ms per division ) Figure 2: Grid for question 5  University of South Florida 2 EE203-pre-180113_Fall Laboratory #3 EE Science II Laboratory #3 Function Generators and Oscilloscopes Summary In this laboratory, you will gain familiarity with using function generators and oscilloscopes to generate and measure AC signals. Both pieces of equipment are indispensable for characterization of low frequency electronic circuits by allowing the user to test the behavior of circuits to different input signals – waveforms of different frequencies, amplitudes, and shapes. As the name suggests, function generators are signal sources capable of generating these test signals in a precise manner. An oscilloscope is an instrument that displays a voltage vs. time graph of the signal presented to its input along with capabilities that allow for accurate measurement of the signal’s characteristics. In this laboratory, you will use a function generator to generate desired signals and use an oscilloscope to display and study the generated signals. The experience you will gain from this laboratory will be used in upcoming lab experiments to test and characterize different circuits. During the course of this lab you will a) Learn the definitions of signal characteristics such as frequency, peak voltage, peak-to-peak voltage, etc. b) Use a function generator to generate a sinusoidal signal of a given frequency and voltage c) Set up an oscilloscope to accurately measure the generated signal and verify the frequency, time between the peaks, and amplitude of the signals d) Explore the effects of the impedance settings, 10 MΩ and 50 Ω, of the oscilloscope on the accuracy of measurement. e) Study the dynamic range of the oscilloscope by (a) changing the frequency and tracking the amplitude (b) changing input voltage and measuring accuracy of oscilloscope display. f) Generate and study different waveforms such as square waves, triangular waves, etc. Objectives   Gain experience with generating signals using a function generator Gain experience with making accurate measurements of time domain signals using an oscilloscope Equipment and Software   Function Generator: Keysight 33500B Oscilloscope: TDS 3052A / DPO 305 Series References   The XYZ’s of Oscilloscopes, Tektronix, Inc., Beaverton, OR (2000) WAMI Lab Oscilloscopes Operation Guide  University of South Florida 1 EE203-sum-180113_Fall
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: Question 1:

Objective of the lab: Generating desired signals with aid of a function generator, those
signals are displayed on oscilloscope and are accurately measured on the oscilloscope.

: Question 2:
Define the following terms and indicate the SI units:
a) Peak voltage
Peak voltage, Vp , is a voltage waveform which is measured from the horizontal axis (at
the 0 height reference...

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