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THE DEVELOPMENT OF MEDIA TECHNOLOGY THE DEVELOPMENT OF MEDIA TECHNOLOGY By Armitha Raras.D FACULTY OF SOCIAL AND POLITICAL SCIENCES UNIVERSITY OF PELITA HARAPAN
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Submitted by armitha on May 22, 2006
Category: Social Issues
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THE DEVELOPMENT OF MEDIA TECHNOLOGY
By Armitha Raras.D
FACULTY OF SOCIAL AND POLITICAL SCIENCES
UNIVERSITY OF PELITA HARAPAN
NOVEMBER 2005
The person who introduced the electromagnetic waves for the first time is James Clerk Maxwell at London University. Then in 1879 George F. FritzGerald proposed the oscillatory currents produced by capacitor charging through inductor might generate Maxwell's waves. Radio waves are one from of electromagnetic radiation. This is the other forms of infrared radiation, light, ultraviolet radiation, X-rays, and Gamma rays. In each forms of electromagnetic radiation consists of oscillatory electric and magnetic filed transverse wave that travel through space at a speed of about 300.000 km per second (180.000 miles per second).
Information, which sends through radio wave, will face interference. To overcome the interference then the standard technique is to combine the signal containing the information with a much higher frequency carrier wave in a process called modulation. Pulse modulation and single side band is usually used for radiotelephony, radiotelegraphy telemetry and other services. The pulse modulation is divided into pulse-amplitude modulation (PAM), pulse-position modulation (PPM), and pulse-duration modulation (PCM). Single side band (SSB) is divided into lower side band and upper side band.
The components of radio technology consists of:
a. Power supply is a direct current power supplying the radio frequency oscillator.
b. Radio frequency oscillator it converts the power to determine by its dimensions.
c. Frequency multiplier.
d. Radio frequency amplifier.
e. Modulator combines the amplified radio-frequency signal.
f. Audio frequency multiplier
g. Transmission line electrical transmission line connects the transmitter to the transmitting antenna.
h. Antenna is designed to launch to an...
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