Refers to radio frequencies in the 3-30 MHz band. In audio it usually refers to frequencies in the 5-10 kHz band.
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.
The band from 3 to 30 mHz in the radio spectrum, as designated by the Federal Communications Commission.
The treble or high end of the audio frequency spectrum.
That part of the electromagnetic spectrum between 3 and 30 MHz.
Radio frequencies between 3 and 30 MHz. This range is often called shortwave.
Portion of the electromagnetic spectrum, typically used in shortwave radio applications; frequencies approximately in the 3 to 30MHz range.
A radio frequency in the range between 3 and 30 megahertz.
The frequency band between 3 and 30 MHz. abbreviation: HF Fr: haute fréquence
Audio frequencies over about 5,000 Hz.
All electrical signals at frequencies greater than 100 kilohertz (kHz). Pulse and digital signals with rise and fall times of less than 10 microseconds are classified as high frequency signals.
Examples of high frequencies used in Metrotech equipment are 82 kHz or 83 kHz. The high frequencies provide the best performance on target lines with poor continuity due to corrosion or the use of insulating gaskets. However, the signals at high frequencies may go a shorter distance down the line and may be more susceptible to bleed-over than the signals at lower frequencies depending on the particular situation.
Frequencies from 3 MHz to 30 MHz.
Covers the entire frequency spectrum above 50,000 Hz. Used in TIG welding for arc ignition and stabilization.
Radio frequencies in the band from 3 to 30 MHz.
(HF). That portion of the radio frequency spectrum between between 3 and 30 MHz.
The portion of the electromagnetic spectrum typically used in short-wave radio applications. It includes frequencies spanning the three- to 30-megahertz range.
All fluorescent lamps operate more efficiently when driven at frequencies greater than 15 kHz. This efficiency improvement is one reason for the popularity of electronic ballasts, which operate at high frequencies.
International Telecommunication Union designation for the 3-30 MHz band of frequencies.
A signal in the frequency range of from 3 to 30 MHz.
Radio wave communication occurs at what is considered high frequency. There are three main types of high frequency
(Hf) Portion of the electromagnetic spectrum, typically used in short-wave radio applications; frequencies approximately in the 2-to-30MHZ range.
The highest audible frequencies. Generally accepted as those over 5,000 Hz.
Used here to refer to the entire subsplit (5-30 MHz) and extended subsplit (5-42 MHz) band used in reverse channel communications over the cable television network.
The portion of electromagnetic spectrum, typically used in shortwave radio applications; frequencies approximately in the 3MHz to 30MHz range.
The band of frequencies from 3 megahertz to 30 megahertz.
High frequency (HF) radio frequencies are between 3 and 30 MHz. Shortwave (2.310 - 25.820 MHz) overlaps and is slightly lower than HF.