EEC 317 Transmission Systems Exam 2026

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EEC 317: First Semester Examination for EEC317, Transmission Systems, College of Technology, Department of Electrical and Electronic Engineering, University of Buea, instructor Dr. Ningo, February 2026, time allowed 3 hours. Question 1 (15 marks) uses the Friis transmission equation to find the received power given a 100 W transmitter with gain 20, a receiving antenna of gain 5, a 5 km free-space path, and a 500 MHz signal. Question 2 (20 marks) computes the acceptance angle and critical angle of an optical fibre with numerical aperture 0.4 and core refractive index 1.495. Question 3 (25 marks) designs a frequency-division multiplexing scheme for six 4 MHz cable-TV channels within an 80-120 MHz band, including showing the multiplexed layout and computing the minimum required bandwidth. Question 4 (10 marks) asks for the main difference between synchronous and asynchronous time division multiplexing.