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Unformatted text preview: ECE 301, Midterm #3 6:30-7:30pm Thursday, April 15, 2010, LYNN 1136, 1. Enter your name, student ID number, e-mail address, and signature in the space provided on this page, NOW! 2. This is a closed book exam. 3. This exam contains multiple choice questions and work-out questions. For multiple choice questions, there is no need to justify your answers. You have one hour to complete it. The students are suggested not spending too much time on a single question, and working on those that you know how to solve. 4. There are 16 pages in the exam booklet. Use the back of each page for rough work. 5. Neither calculators nor help sheets are allowed. Name: Student ID: E-mail: Signature: Question 1: [30%, Work-out question] Consider a continuous time signal x ( t ): x ( t ) = U ( t- )- U ( t + ) . (1) 1. [10%, Outcomes 1, 5] Find the expression and plot the FT X ( j ) of x ( t ) for the range of- 3 &lt; &lt; 3. Carefully mark the height of the main lobe and the points when X ( j ) = 0. Hint: Use the table.) = 0....
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