However, you can always get your ham radio license, and access more of the frequency spectrum, at much higher power output to even achieve intercontinental communications. The modulation schemes ...

It was superseded by MFM and RLL. FM radio was invented in the early 1930s by Edwin Howard Armstrong, who years earlier had made a fortune selling RCA his amplifier technology. When he asked RCA ...

Software-Defined Radio and the Magic of Frequency Modulation The world around us hums with invisible signals, carrying everything from our ...

When the frequency of the modulator (which we'll call M) is in the subaudio range (1-20 Hz), we can hear siren-like changes in pitch of the carrier. However, when we raise M to the audio range (above ...