SDR: Difference between revisions
→RF spectrum: fix superscript syntax Tags: Mobile edit Mobile web edit |
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* Shortwave: 2--30MHz (approximately; no official definition). Sees skywaves. | * Shortwave: 2--30MHz (approximately; no official definition). Sees skywaves. | ||
The ITU defines 12 RF bands, starting at 1. Each band <i>n</i> begins at the wavelength 10< | The ITU defines 12 RF bands, starting at 1. Each band <i>n</i> begins at the wavelength 10<sup>n</sup>, and covers an order of magnitude of wavelength. The corresponding lower frequency is 3x10<sup>8-n</sup>Hz. <i>Medium wave</i> corresponds to the lower portion of band 6 (Medium Frequency). <i>Longwave</i> corresponds to bands 1 (Extremely Low Frequency) through 5 (Low Frequency), though most amateur radio takes place within band 5. <i>Shortwave</i> encloses the top half of band 6, along with band 7 (High Frequency). | ||
==See Also== | ==See Also== | ||
* [https://www.eff.org/wp/gotta-catch-em-all-understanding-how-imsi-catchers-exploit-cell-networks "Gotta Catch 'Em All!"], EFF whitepaper 2019-07-28 regarding IMSI catchers | * [https://www.eff.org/wp/gotta-catch-em-all-understanding-how-imsi-catchers-exploit-cell-networks "Gotta Catch 'Em All!"], EFF whitepaper 2019-07-28 regarding IMSI catchers | ||