Lowest usable high frequency
- Lowest usable high frequency
The lowest usable high frequency (LUF), in radio transmission, is that frequency in the HF band at which the received field intensity is sufficient to provide the required signal-to-noise ratio for a specified time period, e.g., 0100 to 0200 UTC, on 90% of the undisturbed days of the month. The amount of energy absorbed by the lower regions of the ionosphere (D region, primarily) directly impacts the LUF.
ee also
*Maximum usable frequency
*Frequency of optimum transmission
ource
Federal Standard 1037C
Wikimedia Foundation.
2010.
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LUHF — Lowest Usable High Frequency … Acronyms
LUHF — Lowest Usable High Frequency … Acronyms von A bis Z
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