title: Principles of Communication: Systems, Modulation and Noise, 5th Edition
author:  Rodger E. Ziemer 
description: <b>Fundamental communications principles that will keep you on the cutting edge</b>
zlib_text: Chapter 1: Introduction to Communication Systems 
   
  MULTIPLE CHOICE 
   
   1. The theory of radio waves was originated by: 
  a. Marconi 
  c. Maxwell 
  b. Bell 
  d. Hertz 
   
   
  ANS: C 
   
   2. The person who sent the first radio signal across the Atlantic ocean was: 
  a. Marconi 
  c. Maxwell 
  b. Bell 
  d. Hertz 
   
   
  ANS: A 
   
   3. The transmission of radio waves was first done by: 
  a. Marconi 
  c. Maxwell 
  b. Bell 
  d. Hertz 
   
   
  ANS: D 
   
   4. A complete communication system must include: 
  a. a transmitter and receiver 
  b. a transmitter, a receiver, and a channel 
  c. a transmitter, a receiver, and a spectrum analyzer 
  d. a multiplexer, a demultiplexer, and a channel 
   
   
  ANS: B 
   
   5. Radians per second is equal to: 
  a. 2π × f 
  c. the phase angle 
  b. f ÷ 2π 
  d. none of the above 
   
   
  ANS: A 
   
   6. The bandwidth required for a modulated carrier depends on: 
  a. the carrier frequency 
  c. the signal-plus-noise to noise ratio 
  b. the signal-to-noise ratio 
  d. the baseband frequency range 
   
   
  ANS: D 
   
   7. 