opposed to the lowest usable high frequency (LUF) which is the frequency at which communication is possible 90% of the days, and the frequency of optimum...

The lowest usable high frequency (LUF), in radio transmission, is a frequency in the HF band at which the received field intensity is sufficient to provide...

the frequencies at which communication is possible are specified by these parameters: Maximum usable frequency (MUF) Lowest usable high frequency (LUF)...

optimum traffic optimum traffic frequency optimum transmission frequency optimum working frequency Lowest usable high frequency Federal Standard 1037C MIL-STD-188...

organization that supports ocean and space colonization Lowest usable high frequency, a term used for radio transmission Luxembourgish franc, the ISO 4217...

Super high frequency (SHF) is the ITU designation for radio frequencies (RF) in the range between 3 and 30 gigahertz (GHz). This band of frequencies is also...

distribution Frequency of optimum transmission Link budget Lowest usable high frequency Maximum usable frequency Multipath propagation OFDM Rain fade Rayleigh fading...

at high frequencies, and a gradual loss of sensitivity to higher frequencies with age is considered normal. Sensitivity also varies with frequency, as...

to as temporal frequency for clarity and to distinguish it from spatial frequency. Ordinary frequency is related to angular frequency (symbol ω, with...

their practical applications. Radio waves, at the low-frequency end of the spectrum, have the lowest photon energy and the longest wavelengths—thousands...

ionosphere. In this context, the term cutoff frequency refers to the maximum usable frequency, the frequency above which a radio wave fails to reflect off...

(40 MHz) is at present the lowest portion of the very high frequency (VHF) radio spectrum available for national amateur radio use. The term refers to the...

during high sunspot activity years. The usable frequencies change from day to night, because sunlight causes the lowest layer of the ionosphere, called the...

no possible way to add additional frequency bandwidth outside of that currently in use. The lowest frequencies used for radio communication are limited...

lowest-frequency driver from frequencies lower than it can safely handle. Such a crossover would then have a bandpass filter for the lowest-frequency...

of 101 channels, each 200 kHz wide, in the frequency range from 87.8 to 108.0 MHz, with "center frequencies" running from 87.9 MHz to 107.9 MHz. For most...

highest frequency attenuated is 10 to 100 times the lowest frequency attenuated). However, in the audio band, a notch filter has high and low frequencies that...

cable, or satellite. Originally used to mean 'using a wide-spread frequency' and for services that were analog at the lowest level, nowadays in the context...

samples of a low-frequency alias of the high-frequency signal. That is often done purposefully in such a way that the lowest-frequency alias satisfies...

crossover frequency, and into the range where human hearing can "localize" them, wrecking the stereo "image". From about 1900 to the 1950s, the "lowest frequency...

oscillator circuit that uses a piezoelectric crystal as a frequency-selective element. The oscillator frequency is often used to keep track of time, as...

amplifier to one (0 dB) for a frequency at or just below the location of the next highest frequency pole. The lowest frequency pole is called the dominant...

a diplexer. The low-frequency port is used to set the bias; the high-frequency port passes the radio-frequency signals but blocks the biasing levels;...

passband bandwidth is the difference between a highest frequency and a nonzero lowest frequency. A baseband channel or lowpass channel (or system, or network)...

in scientific pitch notation) and extending downward to include the lowest frequency humans can hear, approximately 20 Hz (E0). In this range, human hearing...

during his experimentation with high-frequency currents in an evacuated glass tube for the purpose of studying high voltage phenomena. Tesla called his...

transmission. It is used for radio data systems. This mode is frequently used in amateur radio voice communications, especially on high-frequency bands. DSB-SC...

frequency of the “formant” may vary a little without altering the character of the vowel. For “long e” (ee or iy) for example, the lowest-frequency “formant”...

radio frequencies between 1.8 and 2 MHz, just above the medium wave broadcast band. For many decades the lowest radio frequency band allocated for use by...

within the waveguide, it is one of the lowest loss transmission line types and highly preferred for high frequency applications where most other types of...