18.10 the radio FM transmission system The transmission system in the FM wave is in the range 88-108 MHz from the frequency or wavelength ranges from 2.8-3.4-meter wave transmission system, the am and FM are different, the method of mixing, wave. Thus, the system am radio receiver with FM radio waves cannot be received again.Radio waves are another interesting property is that radio waves can reflect that certain atmospheric layer IO no safia. Because of the atmosphere in this layer is composed of particles that have a large amount of electrical charge. So when radio waves are the most mobile back to the surface RA compounded the world again. This property makes it possible to use radio waves to communicate at different places. But if the radio waves with high frequency properties of reflex, it will happen less and less.To send a broadcast by radio systems am. The waves can travel through a two-way radio receiver is to move straight in the eye, called the wave level ground. Best waves reflected back down to the floor, safia, called IO no wave blue.
การแปล กรุณารอสักครู่..
