FM radio works the same way that AM radio works. The difference is in how the carrier wave is modulated, or altered. With AM radio, the amplitude, or overall strength, of the signal is varied to incorporate the sound information. With FM, the frequenc...
To the shipboard radio operators, it was a miracle — a Christmas miracle. Instead of hearing the usual dots and dashes of Morse Code, these listeners heard an eerie Silent Night, played by a violin. It was Christmas Eve, 1906, and this broadcast...
Short for phase-locked loop, an electronic circuit that controls an oscillator so that it maintains a constant phase angle (i.e., lock) on the frequency of an input, or reference, signal. A PLL ensures that a communication signal is locked on a specif...
USB TO SPDIF [USB-coaxial digital output] - converters. By BB PCM2902 chips, Use74HC04 high speed face lifting, ST-DV709 digital audio output for coupling coaxial SPDIF signals, the digital waveform very good! ! Suitable for connecting external sound ...