AMTS_Pres - AMPLITUDE MODULATING TRANSCEIVERS By: Atul,...

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Unformatted text preview: AMPLITUDE MODULATING TRANSCEIVERS By: Atul, Calvin & Farid Agenda The History The Technology The Future THE HISTORY By: Atul, Calvin & Farid History Demand & need for real-time communication Earliest device- Walkie Talkie First device Motorola SCR-300 1940 Flexibility & freedom Amplitude modulating transceiver Limited by power restrictions Motorola SCR-536 Handie-Talkie Ran on vacuum tubes and used high voltage batteries Patented in 1951 Wide success has lead to the development of new technologies Helmet THE TECHNOLOGY By: Atul, Calvin & Farid In essence, Amplitude Modulation can be broken into 3 steps: 1. The audio signal is modulated 2. The modulated signal is transmitted via a radio wave 3. At the receiving end the audio is recovered through a process called demodulation Modulation The amplitude of the signal is changed in line with the instantaneous intensity of the sound. The Carrier wave then reflects the information that the original signal contained....
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This note was uploaded on 01/24/2012 for the course ECE 317 taught by Professor Peck,t during the Spring '08 term at University of Illinois, Urbana Champaign.

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AMTS_Pres - AMPLITUDE MODULATING TRANSCEIVERS By: Atul,...

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