AM (Amplitude Modulation) system 1.1
?Send waves by changing the carrier wave amplifier by Jude wave signals sent as shown. Frequency range 530-1600, kilo, ton เฮิ, and define a wide range of frequencies to prevent interference with nearby stations are 10. 1.2 FM (Frequency Modulation) system
FM wave wave means that by changing the frequency of the carrier wave by wave signal that you want to send out is the frequency range 88-108 MHZ and the frequency of chongkwang KHZ 150
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