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...r the U.S. Army. The family operates in the ITU frequency bands|very high frequency (VHF) part of the electromagnetic spectrum, which, while requiring a longer ...e manner, direction finding systems may not be able to follow the changing frequency long enough to get an accurate position.

...hman. Measuring ultrashort laser pulses in the time-frequency domain using frequency-resolved optical gating. Rev. Sci. Instrum. 68, 3277 (1997); DOI:10.1063/1.

The '''hertz''' is the [[SI]] unit of frequency, and has units of inverse [[second]]s. The hertz is used only for periodic ...sting uses frequencies from 87.5 MHz to 107.7 MHz. Visible [[light]] has a frequency of about 400 THz to 750 THz.

For a repeating phenomenon such as a [[radio]] signal with a given [[frequency]], the wavelength is the length, in meters, of a single repetition

An [[interference]] between two [[sound]]s of slightly different [[frequency|frequencies]], perceived as periodic variations in volume whose rate is the

...(IEEE) has defined as standard IEEE Standard 521-1984, a system of '''IEEE frequency bands''' for electromagnetic frequencies used for [[radio]] and [[radar]]. | chapter = Frequency letter bands

...uencies, possibly under the control of pseudo-random, network-synchronized frequency selection software

...rom 4.8 to 512 kbps per channel using the C, Ku, or X IEEE frequency bands|frequency bands, which are far too low for large volume data from such sensors as ima

The constant of proportionality relating the energy of a photon to the frequency of that photon, named sfter Max Karl Ernst Ludwig Planck.

*[[Frequency agility]]; varying one or more transmitted signal frequencies ...spread spectrum can be combined with rapidly changing [[frequency agility|frequency changing within the band]], not putting equal power in all frequencies at a

...asting system, transmitting at 518 kHz in the [[ITU frequency bands|medium frequency band]], for textual [[weather information distribution]]. It is intended to ...ice, for inland waters. Other services include safety information in other frequency bands, as well as radiofacsimile weather information.<ref>{{citation |url=h

<noinclude>{{Subpages}}</noinclude>A form of [[frequency compensation]] used in an [[electronic amplifier]] to increase the stabilit

...rasound to detect movement of blood cells by the analysis of the change in frequency of the returning echoes.

...physicist, who in 1842 discovered the 'Doppler effect', where the observed frequency of a wave depends on the velocity of the source relative to the observer.

...radome of the SPS-64|AN-SPS-64 navigational radar. It operates in the IEEE frequency bands|IEEE L-band/NATO C-band, and is mounted higher than the SPY-1|AN/SPY- ...(ECCM) capabilities including frequency agility, variable pulse repetition frequency and sidelobe cancellation.

...]], and [[television]], the '''carrier wave''', also called the '''carrier frequency''', is the basic information-free [[electromagnetic wave]] onto which infor

...(VHF) while air-to-ground and air-to-air is ITU Frequency Bands|ultra-high frequency (UHF). Communications security devices now may be separate; reduction in th

...ength of electromagnetic radiation or an apparent decrease in the observed frequency.

...ctical [[software-defined radio]] family that operates in the full VHF/UHF frequency range, with an internal encryption unit, and compatibility with [[SINCGARS]

...ia''' is "urination of a large volume of urine with an increase in urinary frequency, commonly seen in [[diabetes]] (diabetes mellitus; [[diabetes insipidus]]).