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  • MILSTAR
    ...tional, but they will gradually be replaced by the Advanced Extremely High Frequency (AEHF) family, which at one time was designated MILSTAR III. MILSTAR satellites were the first to use [[ITU Frequency Bands|Extremely High Frequency (EHF)]] communications. They are crosslinked in space with 10 Mbps digital
    741 bytes (110 words) - 10:20, 8 April 2024
  • Frequency Modulation
    #Redirect [[Frequency modulation]]
    34 bytes (3 words) - 08:57, 22 May 2008
  • ITU Frequency Bands
    #REDIRECT [[ITU frequency bands]]
    33 bytes (4 words) - 06:39, 21 May 2008
  • RFID
    #REDIRECT [[Radio Frequency Identification]]
    44 bytes (4 words) - 16:02, 3 February 2009
  • ITU Frequency bands
    #Redirect [[ITU frequency bands]]
    33 bytes (4 words) - 06:38, 21 May 2008
  • IEEE Frequency bands
    #Redirect [[IEEE frequency bands]]
    34 bytes (4 words) - 06:39, 21 May 2008
  • IEEE Frequency Bands
    #Redirect [[IEEE frequency bands]]
    34 bytes (4 words) - 06:40, 21 May 2008
  • High frequency
    #REDIRECT [[ITU frequency bands]]
    33 bytes (4 words) - 06:50, 19 November 2011
  • High-frequency
    #REDIRECT [[ITU frequency bands]]
    33 bytes (4 words) - 06:50, 19 November 2011
  • Radio-Frequency Identification
    #REDIRECT [[Radio Frequency Identification]]
    44 bytes (4 words) - 19:07, 2 February 2009
  • Radar warning receiver/Related Articles
    {{r|IEEE frequency bands}} {{r|ITU frequency bands}}
    413 bytes (58 words) - 04:56, 14 March 2024
  • Diarrhea/Definition
    Abnormal frequency and liquidity of faecal discharges.
    91 bytes (10 words) - 08:04, 7 September 2009
  • MPQ-65
    Its operating frequency is in the [[EU-NATO-US frequency bands|NATO G Band]], between 4 and 6 GHz. The antenna is a [[passive electr
    462 bytes (67 words) - 17:56, 1 April 2024
  • Hertz (unit)/Related Articles
    {{r|Frequency}} {{r|Frequency modulation}}
    463 bytes (55 words) - 07:41, 16 April 2010
  • High frequency/Definition
    A part of the radio frequency spectrum between 3 and 30 Megahertz
    65 bytes (10 words) - 13:23, 11 December 2010
  • Frequency
    ...repetitions (cycles) in a unit of [[time]]. In the [[SI]] system of units, frequency is measured in [[Hertz]] ('''Hz'''), the number of repetitions in one [[sec Frequency ( '''''f''''' ) is the reciprocal of the period ( '''''T
    2 KB (257 words) - 20:29, 21 July 2020
  • Doppler effect/Definition
    <noinclude>{{Subpages}}</noinclude> Frequency changes of a wave due to relative motion between source and observer.
    115 bytes (16 words) - 07:50, 22 May 2011
  • Probe/Definition
    A simple test device to detect radio frequency oscillation in an electronic circuit.
    121 bytes (16 words) - 18:41, 30 September 2009
  • SSQ-57/Definition
    <noinclude>{{Subpages}}</noinclude>U.S. Navy family of low-frequency analysis and recording (LOFAR) passive [[sonobuoy]]s
    121 bytes (16 words) - 00:04, 1 February 2011
  • Frequency modulation/Definition
    Technique for imposing information onto a electromagnetic signal of constant frequency -- the "carrier wave".
    145 bytes (18 words) - 13:09, 11 July 2009
  • Squad tactical radio
    ...typically operate these radios using [[frequency modulation]] in the [[ITU frequency bands|high HF to low VHF frequencies]], typically 30-75 MHz.
    620 bytes (93 words) - 10:20, 8 April 2024
  • Defense Satellite Communications System
    ...sent [[MILSTAR]] system, or their replacement, the Advanced Extremely High Frequency (AEHF) satellites. AEHF will provide substantially more bandwidt. ...eosynchronous orbit (GEO)]], and have six [[ITU frequency bands|Super High Frequency (SHF)]] communications relay channel [[transponder]]s, plus a seventh chann
    951 bytes (130 words) - 10:20, 8 April 2024
  • Cold probe (NMR)/Definition
    A radio frequency exitation and receiving probe whose electronics are cooled to 15-25 degrees
    154 bytes (20 words) - 12:21, 8 November 2008
  • SSQ-53/Definition
    Directional frequency analysis and recording (DIFAR) passive [[sonobuoy]] family built for the [[
    153 bytes (18 words) - 01:18, 1 February 2011
  • Vibrational spectrum
    ==Fundamental frequency== ...l vibration frequencies are typically integer multiples of the fundamental frequency. In more complex systems, such as the circular membranes used for drum head
    2 KB (288 words) - 13:04, 19 February 2022
  • Pitch (music)/Definition
    Perceived frequency of a sound or [[Tone (music)|musical tone]].
    100 bytes (13 words) - 17:46, 30 June 2012
  • Megahertz/Definition
    Frequency measurement - things that [[oscillate]] more than one million times a secon
    155 bytes (21 words) - 20:39, 5 January 2024
  • RF electronics
    '''RF (radio frequency) electronics''' have two subsystems: the transmitter and the receiver. ...MR experiments require simultaneous application of RF pulses of different frequency. Earlier MR systems used waveform generators with subsequent phase modulati
    1 KB (187 words) - 16:18, 3 April 2024
  • ITU frequency bands/Related Articles
    Auto-populated based on [[Special:WhatLinksHere/ITU frequency bands]]. Needs checking by a human. {{r|EU-NATO-US frequency bands}}
    1 KB (187 words) - 09:11, 22 April 2024
  • BIG BACK radar/Definition
    Soviet [[EU-NATO-US frequency bands|E-band]] early warning radar, used with [[SA-5 GAMMON]] [[surface-to-
    154 bytes (17 words) - 19:34, 2 August 2008
  • Hardy-Weinberg principle/Definition
    States that [[gene frequency]] remains constant across generations (no [[genetic drift]]) unless a force
    180 bytes (23 words) - 08:46, 13 August 2010
  • Hertz (unit)/Definition
    The international ([[SI]]) unit of [[frequency]], with units of inverse [[second]]s, commonly called cycles per seocond.
    156 bytes (20 words) - 04:14, 30 November 2009
  • Satellite communications
    ==Operating frequency tradeoffs== Satellites operating in the [[ITU Frequency Bands|Ultra-High Frequency (UHF)]] offer the advantage of simple receivers and antennas, with plausibl
    2 KB (255 words) - 10:05, 10 February 2023
  • Operation Rafter
    ...t frequency'' from the local oscillator, and the known unmodulated carrier frequency. ...ubsequent stages of the receiver are pretuned, such as 455 kHz in a medium-frequency AM broadcast radio.
    2 KB (318 words) - 16:22, 30 March 2024
  • Modulation
    ...r wave of the basic waveform. While the term is most often used with radio frequency carrier waves, it can apply to sound waves as well, such as when a basic st ...dulation:Changing the frequency (i.e., the time between peaks of the basic frequency)
    2 KB (283 words) - 16:23, 30 March 2024
  • Roughness (acoustics)/Definition
    In a sound, the overall deviation of the frequency ratios from those of an [[overtone]] series.
    131 bytes (19 words) - 07:11, 7 April 2010
  • 1-f noise/Definition
    Electromagnetic noise proportional to f<sup>-n</sup>, where f = frequency and n={0,1,2).
    124 bytes (16 words) - 15:26, 13 July 2008
  • Density (number theory)/Definition
    The asymptotic frequency of a subset of the natural numbers.
    97 bytes (13 words) - 17:36, 24 August 2009
  • Modem
    ...frequency bands|high frequency (HF)]] or [[ITU frequency bands| very high frequency (VHF)]].
    1 KB (230 words) - 20:22, 27 August 2008
  • Normal distribution/Definition
    a symmetrical bell-shaped probability distribution representing the frequency of random variations of a quantity from its mean.
    163 bytes (20 words) - 12:25, 1 July 2009
  • Sound (acoustics)/Definition
    The range of [[frequency|frequencies]] that can be [[hearing|heard]] by a [[life|living]] [[organism
    174 bytes (23 words) - 02:43, 15 February 2012
  • Network medium/Definition
    A physical medium, including a designated [[frequency]] and physical scope, of the [[electromagnetic spectrum]], over which multi
    192 bytes (23 words) - 19:32, 31 July 2008
  • Spectroscopy/Definition
    The study of a system or object by means of selected [[frequency band]]s in the [[electromagnetic spectrum]].
    145 bytes (21 words) - 10:29, 31 July 2009
  • Pitch (music)/External Links
    ...fs/bain/atmi02/tuning/default.html |title=12 Tone Equal Temperament (12TET)Frequency Table based on A4 = 440 Hz |author=Reginald Bain |year=2002 |accessdate=201
    224 bytes (33 words) - 21:42, 27 June 2012
  • Nuclear Overhauser effect/Definition
    ...in intensity of a signal when irradiation is carried out at the resonance frequency of a spatially proximal nucleus.
    160 bytes (23 words) - 04:01, 28 January 2009
  • SQUARE PAIR radar/Definition
    ...[[SA-5 GAMMON]] [[surface-to-air missile]], operating in the [[EU-NATO-US frequency bands|H-band]]
    174 bytes (20 words) - 19:42, 2 August 2008
  • PRC-25/Related Articles
    {{r|Frequency modulation}} {{r|Frequency synthesizer}}
    327 bytes (47 words) - 03:42, 3 March 2009
  • Squad tactical radio/Related Articles
    {{r|Frequency modulation}} {{r|Frequency agility}}
    475 bytes (68 words) - 03:00, 3 March 2009
  • FM (disambiguation)
    {{r|Frequency modulation|FM}}
    63 bytes (8 words) - 08:46, 28 February 2010
  • SSQ-57
    ...ber of allies, '''AN/[[SSQ-57]]''' [[sonobuoy]]s are passive acoustic, low-frequency listening devices dropped from aircraft and helicopters. In [[antisubmarin ...ibrated low-frequency analysis and recording (LOFAR) sonobuoy. It is a low-frequency version of the earlier AN/SSQ-41 passive sonobuoy, no longer in service. On
    1 KB (169 words) - 17:56, 1 April 2024
  • Single Channel Ground and Airborne Radio System
    ...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.
    3 KB (476 words) - 16:23, 30 March 2024
  • Fixed point/Bibliography
    ...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.
    843 bytes (106 words) - 23:11, 31 January 2009
  • Hertz (unit)
    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.
    2 KB (233 words) - 04:14, 30 November 2009
  • Wavelength/Definition
    For a repeating phenomenon such as a [[radio]] signal with a given [[frequency]], the wavelength is the length, in meters, of a single repetition
    181 bytes (27 words) - 12:58, 28 September 2008
  • Beat (acoustics)/Definition
    An [[interference]] between two [[sound]]s of slightly different [[frequency|frequencies]], perceived as periodic variations in volume whose rate is the
    233 bytes (29 words) - 05:45, 11 October 2009
  • IEEE frequency bands
    ...(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
    2 KB (267 words) - 20:38, 20 November 2008
  • Frequency agility/Definition
    ...uencies, possibly under the control of pseudo-random, network-synchronized frequency selection software
    249 bytes (29 words) - 23:46, 17 July 2008
  • TSQ-190
    ...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
    892 bytes (129 words) - 18:08, 1 April 2024
  • Planck's constant/Definition
    The constant of proportionality relating the energy of a photon to the frequency of that photon, named sfter Max Karl Ernst Ludwig Planck.
    175 bytes (26 words) - 04:40, 4 September 2009
  • Low probability of intercept
    *[[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
    2 KB (260 words) - 10:44, 8 April 2024
  • NAVTEX
    ...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
    1 KB (200 words) - 12:47, 15 January 2024
  • Pole splitting/Definition
    <noinclude>{{Subpages}}</noinclude>A form of [[frequency compensation]] used in an [[electronic amplifier]] to increase the stabilit
    216 bytes (31 words) - 09:09, 5 June 2011
  • Doppler ultrasonography/Definition
    ...rasound to detect movement of blood cells by the analysis of the change in frequency of the returning echoes.
    186 bytes (28 words) - 08:16, 7 September 2009
  • Johann Christian Andreas Doppler/Definition
    ...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.
    257 bytes (34 words) - 18:53, 13 September 2009
  • SPS-49
    ...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.
    1 KB (193 words) - 16:23, 30 March 2024
  • Carrier wave
    ...]], and [[television]], the '''carrier wave''', also called the '''carrier frequency''', is the basic information-free [[electromagnetic wave]] onto which infor
    229 bytes (26 words) - 08:40, 11 December 2009
  • Forward air controller
    ...(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
    2 KB (278 words) - 18:47, 3 April 2024
  • Redshift/Definition
    ...ength of electromagnetic radiation or an apparent decrease in the observed frequency.
    229 bytes (32 words) - 00:01, 13 April 2011
  • PRC-117/Definition
    ...ctical [[software-defined radio]] family that operates in the full VHF/UHF frequency range, with an internal encryption unit, and compatibility with [[SINCGARS]
    295 bytes (42 words) - 00:41, 6 February 2009
  • Polyuria
    ...ia''' is "urination of a large volume of urine with an increase in urinary frequency, commonly seen in [[diabetes]] (diabetes mellitus; [[diabetes insipidus]]).
    239 bytes (30 words) - 01:35, 7 October 2013
  • Electromagnetic radiation/Related Articles
    {{r|Frequency}} {{r|IEEE frequency bands}}
    2 KB (308 words) - 09:08, 19 April 2024
  • Amplitude modulation
    :#Carrier frequency :#Information frequency
    2 KB (270 words) - 12:56, 22 September 2020
  • SIDE NET radar/Definition
    Soviet [[EU-NATO-US frequency bands|D or E-band]] nodding height finding radar used with the [[S-75 Dvina
    215 bytes (29 words) - 06:56, 4 April 2024
  • Silicon carbide/Definition
    ...s potential as a semiconductor for applications requiring high power, high frequency or a large degree of chemical inertness.
    292 bytes (44 words) - 15:07, 8 January 2009
  • IEEE 802.15.4/Definition
    ...re defined to operate in a variety of geographic regions with a variety of frequency bands.
    227 bytes (35 words) - 10:38, 25 April 2023
  • International Concert Pitch/Definition
    ...es}}</noinclude>A standardization of [[Pitch (music)|pitch]] that sets the frequency of a simple [[Tone (music)|tone]] at pitch ''A''4 (the ''A'' above middle '
    198 bytes (30 words) - 09:18, 5 July 2012
  • JTRS waveform/Definition
    ...form]] includes the [[software-defined radio]] not only to emulate a given frequency range and modulation, but encryption, medium-sharing technique for multiple
    307 bytes (39 words) - 19:47, 20 June 2009
  • PRC-25
    Its main successor is the [[PRC-119|AN/PRC-119]], which added [[SINCGARS]] frequency agility; the PRC-119 will be replaced by new [[software-defined radio]]s, i ...ting in the [[ITU frequency bands|high HF/low VHF frequency band]] using [[frequency modulation]] (FM), it had a maximum range, using full power and its standar
    3 KB (450 words) - 15:37, 8 April 2024
  • Spectrometry
    ...oscopy]] &mdash; the analysis of absolute and/or relative contributions of frequency components to the spectrum of a given sample or object.
    335 bytes (45 words) - 20:47, 12 April 2011
  • PRC-10
    ...be radio with preselected frequencies in the 38.0 to 54.9 MHz range, using frequency modulation without any electronic protection. ...save for operating frequencies, which went into the upper end of the High Frequency (HF) band for the -8 and -9.
    3 KB (420 words) - 18:08, 1 April 2024
  • Vacuum (classical)/Definition
    ...se ideal properties include: independence from field strengths, direction, frequency, or polarization, and from temperature.
    357 bytes (48 words) - 15:48, 27 March 2011
  • Maritime and Coastguard Agency
    ..., and, when going more than a specified distance offshore, carrying [[ITU frequency bands|MF/SSB]] radio, [[INMARSAT]] satellite communications, and [[NAVTEX]]
    1 KB (167 words) - 23:30, 12 August 2008
  • Nuclear Overhauser effect
    ...s changes in the intensity of a signal at one frequency when the resonance frequency of a different nucleus is irradiated, due to dipole-dipole interactions bet ...<math><S_z></math> is the magnetization of spin S after irradiation at the frequency of spin I,
    3 KB (493 words) - 19:42, 28 March 2011
  • Spectral resolution/Definition
    In [[multispectral scanning]], the number of discrete frequency (or equivalent) bands recorded in an individual pixel. Remember that relati
    393 bytes (54 words) - 14:52, 8 June 2010
  • Telemetry
    ...chniques to put a continuously varying instrument reading onto a [[radio]] frequency received by an earth station. Extremely complex analog tape recorders, wit ...pollo]], [[IEEE frequency bands|S-band]] was common, rather than the [[ITU frequency bands|VHF]] of the Second World War and through the fifties.
    2 KB (324 words) - 16:37, 22 August 2009
  • Tension headache/Definition
    ...ty in the [[head]]; [[scalp]]; or [[neck]]. The subtypes are classified by frequency and severity of symptoms. There is no clear cause even though it has been a
    420 bytes (58 words) - 13:17, 22 August 2010
  • Amateur radio
    ...eception of radio signals made through certain assigned bands in the radio frequency spectrum by private individuals for non-commercial and two-way purposes. Mi ...[Slow Scan Television]] is a popular way of transmitting images over lower frequency bands, in higher bands (ATV) [[Amateur Television]] is becoming a more soph
    2 KB (295 words) - 20:53, 24 September 2007
  • SPS-64
    ...nclude [[EU-NATO-US frequency bands|E/F and I/J military bands]] or [[IEEE frequency bands|IEEE S or X bands]], with power levels from 10 to 60 kilowatts.
    2 KB (252 words) - 15:42, 8 April 2024
  • Low probability of intercept/Related Articles
    {{r|Frequency agility}}
    208 bytes (25 words) - 23:56, 13 August 2009
  • Radio Frequency Identification/Related Articles
    {{r|IEEE frequency bands}}
    167 bytes (19 words) - 21:11, 8 March 2011
  • Bode plot/Definition
    ...ransfer function]] of a linear, time-invariant system plotted with a log-[[frequency]] axis. There are two plots: the Bode magnitude plot and the Bode phase plo
    309 bytes (48 words) - 20:30, 3 June 2011
  • MIDI (Musical Instrument Digital Interface)/Definition
    ...number 69, and adjacent notes tuned according to equal temperament in the frequency ratio 2<sup>1/12</sup>. Various codes allow selection of [[timbre]] and of
    361 bytes (56 words) - 10:19, 27 June 2012
  • Electromagnetic spectrum
    ...ectromagnetic radiation can be described in terms of its [[Energy]] (E), [[frequency]] (f), [[wavenumber]] (v'), or [[wavelength]] (<math>\lambda</math>). These ...e]], there may be difficult tradeoffs between letting an enemy use a radio frequency for his own purposes while one's own side is gaining [[signals intelligence
    3 KB (372 words) - 10:35, 4 April 2024
  • Miller effect/Bibliography
    |chapter=Chapter 7: Frequency response of integrated circuits
    448 bytes (71 words) - 14:16, 24 May 2011
  • Enhanced Position Location Reporting System
    ..., [[frequency agility|frequency-hopping]] [[ITU frequency bands|ultra-high frequency (UHF)]] waveform. Army Data Distribution System is also compatible with [[
    2 KB (333 words) - 10:20, 8 April 2024
  • HAVE QUICK II
    ...hysically smaller than the equivalent in the ITU frequency bands|very high frequency (VHF) spectrum. ...e manner, direction finding systems may not be able to follow the changing frequency long enough to get an accurate position.
    4 KB (694 words) - 16:22, 30 March 2024
  • Tension-type headache/Definition
    ...ty in the [[head]]; [[scalp]]; or [[neck]]. The subtypes are classified by frequency and severity of symptoms. There is no clear cause even though it has been a
    511 bytes (67 words) - 14:54, 13 October 2010
  • Case-control studies/Definition
    ...examined by comparing diseased and non-diseased persons with regard to the frequency or levels of the attribute in each group.<noinclude>{{DefMeSH}}</noinclude>
    393 bytes (57 words) - 17:55, 14 May 2010
  • Doppler ultrasonography
    ...onography''' is "[[ultrasonography]] applying the [[Doppler effect]], with frequency-shifted ultrasound reflections produced by moving targets (usually red bloo ...que is the ability to estimate the velocity of flow from the Doppler shift frequency."<ref>{{MeSH|Duplex Doppler ultrasonography}}</ref>
    2 KB (227 words) - 15:23, 12 April 2011
  • Vocal cords/Related Articles
    {{r|Fundamental frequency}}
    400 bytes (50 words) - 07:40, 10 November 2010
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