Frequency of optimum transmission
- Frequency of optimum transmission
Frequency of optimum transmission, in the transmission of radio waves via ionospheric reflection, is the highest effective (i.e. working) frequency that is predicted to be usable for a specified path and time for 90% of the days of the month. It is often abbreviated as FOT. The FOT is normally just below the value of the maximum usable frequency (MUF). In the prediction of usable frequencies, the FOT is commonly taken as 15% below the monthly median value of the MUF for the specified time and path.
The FOT is usually the most effective frequency for ionospheric reflection of radio waves between two specified points on Earth.
Synonyms for this term include:
*frequency of optimum traffic
*optimum traffic frequency
*optimum transmission frequency
*optimum working frequency
ee also
*Lowest usable high frequency
Sources
*Federal Standard 1037C
*MIL-STD-188
Wikimedia Foundation.
2010.
Look at other dictionaries:
Maximum usable frequency — (MUF) describes, in radio transmission, using reflection from the regular ionized layers of the ionosphere, the upper frequency limit that can be used for transmission between two points at a specified time, independent of transmitter power. This … Wikipedia
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 … Wikipedia
Transmission control unit — A transmission control unit or TCU is a device that controls modern electronic automatic transmissions. A TCU generally uses sensors from the vehicle as well as data provided by the Engine Control Unit to calculate how and when to change gears in … Wikipedia
High-resolution transmission electron microscopy — (HRTEM) is an imaging mode of the transmission electron microscope (TEM) that allows the imaging of the crystallographic structure of a sample at an atomic scale. [cite book |title=Experimental high resolution electron microscopy |last=Spence… … Wikipedia
Orthogonal frequency-division multiplexing — Passband modulation v · d · e Analog modulation AM · … Wikipedia
Variable-frequency drive — A variable frequency drive (VFD) is a system for controlling the rotational speed of an alternating current (AC) electric motor by controlling the frequency of the electrical power supplied to the motor.cite book | first=Sylvester J. |… … Wikipedia
Fading — This article is about signal loss in telecommunications. For the poetry book, see Fading (book). For other uses, see Fade (disambiguation). Frequency selective time varying fading causes a cloudy pattern to appear on a spectrogram. Time is shown… … Wikipedia
List of radio propagation topics — This is a list of radio propagation terms. NOTOC A a index A index aa index active prominence active prominence region (APR) active region active surge region (ASR) active dark filament (ADF) AE index Air Force Geophysics Laboratory (AFGL) arch… … Wikipedia
FOT — Fót is a town in Pest county, Hungary.FOT is a three letter acronym. * In radio transmission, FOT stands for Frequency of Optimum Transmission. * In computer networking, FOT stands for Fiber Optic Transceiver. *.fot is the extension of a type of… … Wikipedia
Antenna (radio) — Whip antenna on car … Wikipedia
