TELECOM

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TELECOM

• V f x l

m/s
hz
m
V is speed ,f is frequency l is wavelength

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TELECOM

• v d/t
• v is speed in m/s
• d is distance in m
• t is time ins

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TELECOM

• Radio waves are carried from transmitter by the
  carrier wave.
• Speed of radio waves is
• 300,000,000m/s

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TELECOM

• The main parts of a radio receiver are
• Aerial receives all signals
• Tuner tunes into one particular signal

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TELECOM

• Decoder separates the carrier wave from the
  audio (sound ) wave
• Amplifier gives a bigger copy of the audio wave

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TELECOM

• LOUDSPEAKER TURNS THE ELECTRICAL SIGNAL INTO
  SOUND
• DIFFERENT RADIO STATIONS ARE IDENTIFIED BY THE
  CARRIER WAVE FREQUENCY

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SPACE

• Radio waves are detected by large curved dishes
  similar to the dish aerials in T.V. systems

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