Why Have A Manuall?
Radio Definition, History, & Facts In order to receive the weak signals from distant spacecraft, satellite ground stations use large parabolic "dish" antennas up to 25 metres in diameter and extremely sensitive receivers. Portions of the UHF, L, C, S, ku and ka band are allocated for space communication. A radio link that transmits data from the Earth's surface to a spacecraft is called an uplink, while a link that transmits data from the spacecraft to the ground is called a downlink. Bluetooth – a very short-range wireless interface on a portable wireless device used as a substitute for a wire or cable connection, mainly to exchange files between portable devices and connect cellphones and music players with wireless headphones. So there is an incentive to employ technology to minimize the bandwidth used by radio services. The existence of radio waves was first proven by German physicist Heinrich Hertz on November 11, 1886. The first commercial radio broadcast wa