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BINARY SIGNALS

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THE FIVE ELECTRICAL SYMBOLS USED ON THE TELEGRAPH CAN BE REPLACED BY JUST TWO SYMBOLS.

VOLTAGE = 1.5 REPRESENTS "1"

VOLTAGE = 0 REPRESENTS "0"

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  • THE DURATION OF THE VOLTAGE PULSES MUST BE FIXED.

  • THIS TECHNIQUE IS CALLED ON-OFF KEYING. IT IS USED WHEN COMPUTERS TALK TO MODEMS, PRINTERS, ...



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Williams College
Department of Computer Science
This page is part of a section of lecture slides related to " Baseband Transmission " within the topic "Digital Transmission Technology". Other slides within this section and other sections of slides for the topic "Digital Transmission Technology" can be accessed using the links below.
  • Baseband Transmission
  • HISTORICAL DIGITAL COMMUNICATION
  • TELEGRAPH SIGNALS
  • BINARY SIGNALS
  • SYNCHRONIZATION
  • MANCHESTER ENCODING
  • Transmission Media
  • TRANSMISSION MEDIA
  • ELECTRICAL MEDIA
  • OPTICAL FIBER
  • Multiplexing
  • MULTIPLEXING
  • TIME DIVISION MULTIPLEXING
  • FREQUENCY DIVISION MULTIPLEXING
  • WHAT IS LIGHT?
  • PROPERTIES OF WAVEFORMS
  • THE ELECTRO-MAGNETIC SPECTRUM
  • Modulation
  • MODULATION
  • MODULATION AND CARRIERS
  • THE WAVE LAB
  • MODULATION ON OTHER MEDIA
  • A LIMIT ON MODULATION
  • ANALOG MODULATION
  • Understanding Bandwidth
  • REMEMBER WHAT "FDM" MEANS?
  • WHY SINE WAVES?
  • FOURIER SERIES
  • BANDWIDTH