Difference between revisions of "Spectrum"
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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. | 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: | ||
| + | {| border="1" cellpadding="2" | ||
| + | |+'''Spectrum Table''' | ||
| + | |- | ||
| + | ! style="background:#efefef;" | Name | ||
| + | ! colspan="1" style="background:#efefef;" | Spectrum | ||
| + | |- | ||
| + | | ELF || Extremely Low Frequency < 3 kHz | ||
| + | |- | ||
| + | | VLF || Very Low Frequency 3 - 30 kHz | ||
| + | |- | ||
| + | | LF || Low Frequency 30 - 300 kHz | ||
| + | |- | ||
| + | | MF || Medium Frequency 300 kHz - 3 MHz | ||
| + | |- | ||
| + | | HF || High Frequency 3 - 30 MHz | ||
| + | |- | ||
| + | | VHF || Very High Frequency 30 - 300 Mhz | ||
| + | |- | ||
| + | | UHF || Ultra High Frequency 300 MHz - 3 GHz | ||
| + | |- | ||
| + | | SHF || Super High Frequency 3 - 30 GHz | ||
| + | |- | ||
| + | | EHF || Extremely High Frequency 30 - 300 GHz | ||
| + | |} | ||
Revision as of 13:38, 24 March 2005
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:
| Name | Spectrum |
|---|---|
| ELF | Extremely Low Frequency < 3 kHz |
| VLF | Very Low Frequency 3 - 30 kHz |
| LF | Low Frequency 30 - 300 kHz |
| MF | Medium Frequency 300 kHz - 3 MHz |
| HF | High Frequency 3 - 30 MHz |
| VHF | Very High Frequency 30 - 300 Mhz |
| UHF | Ultra High Frequency 300 MHz - 3 GHz |
| SHF | Super High Frequency 3 - 30 GHz |
| EHF | Extremely High Frequency 30 - 300 GHz |