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Write 2 factor which justify the …

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Write 2 factor which justify the need of modulating a low frequency signal into high frequencies before transmission

  • 1 answers

Shweta Gulati 7 years, 1 month ago

An un-modulated signal is having lower frequency range hence unable to travel a longer distance because of lower energies. Secondly since antenna length is inversely proportional to frequency, so a lower frequency signal will increase the antenna length beyond imagination. In modulation the characteristics such as amplitude, frequency or phase of a a higher frequency(carrier) signal is changed in according with the instantaneous value of the base band signal which can then be transmitted to a larger distance. Reverse process is done at the receiver to recover back the original signal

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