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Definition of "Lowest Usable Frequency" |
The minimum operating frequency that can be used for communications between two points. / Lowest usable frequency 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, example, 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. / A SerDes is an integrated circuit transceiver that converts parallel data to serial data and vice-versa. The transmitter section is a serial-to-parallel converter, and the receiver section is a parallel-to-serial converter. |
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