Types of Signals and their Purpose
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Questions and Answers

What is the main purpose of a signal in a communication system?

  • To create interference in the transmission
  • To disrupt the transmission of data
  • To ensure synchronization between sender and receiver (correct)
  • To maximize noise in the channel

What unit is used to measure wavelength?

  • Volts
  • Hertz
  • Meters (correct)
  • Amperes

What does the term 'amplitude' refer to in a wave?

  • Measurement of the delay of the wave relative to a reference point
  • Vertical distance from a point on the wave to the horizontal axis (correct)
  • Position of the waveform relative to time zero
  • Number of waves per second

Which frequency range is associated with Ground Wave (GW) propagation?

<p>30 KHz - 300 KHz (B)</p> Signup and view all the answers

Which term describes the number of waves made per second?

<p>Frequency (A)</p> Signup and view all the answers

What type of propagation is common in the frequency range of 3 KHz - 30 KHz?

<p>GW propagation (B)</p> Signup and view all the answers

What is noise in a communication system?

<p>Interference - an unwanted and undesired form of signal (D)</p> Signup and view all the answers

What type of signals are commonly associated with Infrared communication?

<p>Video signals (C)</p> Signup and view all the answers

Which frequency range is used for International broadcasting and military communication?

<p>30 MHz - 300 MHz (C)</p> Signup and view all the answers

What type of propagation is associated with Ultra-High Frequency (UHF) signals?

<p>Line-Of-Sight (LOS) propagation (A)</p> Signup and view all the answers

Which frequency range is used for radar, satellite communication, and wireless local loops?

<p>30 GHz - 300 GHz (B)</p> Signup and view all the answers

What does phase describe in a waveform?

<p>Position of the waveform relative to time zero; measurement of delay (A)</p> Signup and view all the answers

Which type of wave has a fixed amplitude but its pulse width and frequency can be changed?

<p>Digital wave (C)</p> Signup and view all the answers

What is an example of an Analog wave?

<p>Human voice (B)</p> Signup and view all the answers

Which type of media uses cables and is limited by physical geography?

<p>Wired Media (D)</p> Signup and view all the answers

What is the transmission mode where data flows in one direction only?

<p>Simplex Mode (A)</p> Signup and view all the answers

Which type of signal represents data stored in the memory of a computer as 0s and 1s?

<p>Digital signal (B)</p> Signup and view all the answers

What is the characteristic of an Unbounded Media?

<p>Transmits data through waves (A)</p> Signup and view all the answers

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