1.1 system am (amplitude modulation = A.M.)
m's system has frequency range 530-1600 kHz (kilohoenta) to communicate through sound waves into the mix with radio waves is called "carrier wave" amplifier-carrier wave's changes according to the sound wave interference
.Wave transmission system, A.M. Can send waves of waves of soil as a wave moving in a straight line parallel to the surface of the Earth and sky waves, the waves are going to reflect that atmosphere ionosphere? Laeosathon back down so it does not need to use the antenna set up receiving
1.2. FM systems (F.M. frequency modulation) =
FM system with frequency range 88-108 MHz (megahertz), sound waves, using a mix of communication with carrier wave by wave frequency carrier wave signal based on changes in the sound system wave
. F.M. Send only wave the wave of soil. If you want to send, an area must have a relay station and a receiving antenna is high.
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