eee206_2003_exam - EEE206 Data Provided: None EEE206 The...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
EEE206 Data Provided: None EEE206 The University of Sheffield DEPARTMENT OF ELECTRONIC AND ELECTRICAL ENGINEERING Spring Semester 2002-2003 (2 hours) EEE206: COMMUNICATION SYSTEMS Answer THREE questions. No marks will be awarded for solutions to a fourth question. Solutions will be considered in the order that they are presented in the answer book. Trial answerswill be ignored if they are clearly crossed out. The numbers given after each section of a question indicate the relative weighting of that section. 1. (a) Explain why the processes of modulation and demodulation are widely used in communication systems. (5) (b) Define the term "modulation index", m, as it relates to an amplitude-modulated signal and explain why in practice the value of m should be kept less than 1. (2) (c) An AM DSB CP transmitter has an output power of 5 kW when sinusoidally modulated to a depth of 100%. Determine the power output when (i) the carrier is unmodulated (3) (ii) after sinusoidal modulation to a depth of 85%, one sideband is
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/25/2008 for the course EEE 206 taught by Professor Langley during the Spring '08 term at University of Sheffield.

Page1 / 2

eee206_2003_exam - EEE206 Data Provided: None EEE206 The...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online