Difference between revisions of "Spectrum"
From The RadioReference Wiki
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== References == | == References == | ||
| − | * The National Telecommunications and Information Administration (NTIA) Office of Spectrum Management (OSM) publishes the [http://www.ntia.doc.gov/ | + | * The National Telecommunications and Information Administration (NTIA) Office of Spectrum Management (OSM) publishes the [http://www.ntia.doc.gov/page/2011/united-states-frequency-allocation-chart United States Frequency Allocation Chart] which shows radio spectrum use in the US. |
* [http://www.fcc.gov/encyclopedia/radio-spectrum-allocation FCC Radio Spectrum page] | * [http://www.fcc.gov/encyclopedia/radio-spectrum-allocation FCC Radio Spectrum page] | ||
* [http://en.wikipedia.org/wiki/Electromagnetic_spectrum Wikipedia electromagnetic spectrum article] | * [http://en.wikipedia.org/wiki/Electromagnetic_spectrum Wikipedia electromagnetic spectrum article] | ||
Revision as of 17:16, 4 February 2012
Spectrum is the distribution of wavelengths and frequencies.
In scanning and radio frequency uses, we often refer to a bandwidth of spectrum as a "band". These "bands" are frequencies that exist in a continuous range and usually have a common characteristic which identify it as a type of band.
These bands are divided by the area of the spectrum in which they are located. Those "bands" are commonly accepted to conform to the following table:
| Abbreviation | Name | Frequency | Wavelength |
|---|---|---|---|
| ELF | Extremely Low Frequency | < 3 kHz | > 100 km |
| VLF | Very Low Frequency | 3 kHz - 30 kHz | 100 km - 10 km |
| LF | Low Frequency | 30 kHz - 300 kHz | 10 km - 1000 m |
| MF | Medium Frequency | 300 kHz - 3 MHz | 1000 m - 100 m |
| HF | High Frequency | 3 MHz - 30 MHz | 100 m - 10 m |
| VHF | Very High Frequency | 30 MHz - 300 MHz | 10 m - 1 m |
| UHF | Ultra High Frequency | 300 MHz - 3 GHz | 1 m - 10 cm |
| SHF | Super High Frequency | 3 GHz - 30 GHz | 10 cm - 1 cm |
| EHF | Extremely High Frequency | 30 GHz - 300 GHz | 1 cm - 1 mm |
References
- The National Telecommunications and Information Administration (NTIA) Office of Spectrum Management (OSM) publishes the United States Frequency Allocation Chart which shows radio spectrum use in the US.
- FCC Radio Spectrum page
- Wikipedia electromagnetic spectrum article