The portion of the radio frequency spectrum between 3 and 30 MHz. This frequency range, characterized by wavelengths between 10 and 100 meters, is commonly called the Short Wave band.
Indicates an infrared system that employs frequencies higher than the industry standard. Some examples would be Bang & Olufsen, Kenwood (455KHz) and older Pioneer Elite (1.125MHz). Such devices are never preprogrammed into off-the-shelf remote controls and can generally only be used with very specific learning remote controls. For more information visit this page. See also: frequencies, learning, IRDA, infrared emitter.