Search results

Jump to navigation Jump to search

Page title matches

Page text matches

  • Single Channel Ground and Airborne Radio System/Definition
    ...ery high frequency (VHF)]] part of the electromagnetic spectrum; it uses [[frequency agility]] and is otherwise designed to operate in an [[electronic warfare]]
    313 bytes (44 words) - 22:45, 11 September 2009
  • TALL KING/Definition
    ...-range early warning [[radar]], operating in the [[ITU frequency bands|VHF frequency range]]
    141 bytes (18 words) - 21:58, 31 October 2008
  • Wavelength/Related Articles
    {{r|Frequency}} {{r|ITU frequency bands}}
    334 bytes (41 words) - 16:03, 8 March 2010
  • NAVTEX/Definition
    ...itime Distress and Safety System]] (GMDSS), a [[ITU frequency bands|medium frequency]] radio broadcast service for marine-oriented weather information
    223 bytes (27 words) - 09:33, 24 August 2010
  • Frequency agility
    ...the frequencies available for use, and the schedule or events that cause a frequency shift. ...as cellular radio that shifts to find a frequency that is not busy, in a [[frequency division multiple access]] network.
    1 KB (197 words) - 05:49, 8 April 2024
  • ITU frequency bands
    ...radar designations used widely in civilian practice, and the [[EU-NATO-US frequency bands]] for a nomenclature that works well in fine-grained radar band discu ! Frequency range
    2 KB (232 words) - 10:54, 19 September 2009
  • Radio/Related Articles
    {{r|Frequency modulation}} {{r|Radio-Frequency Identification}}
    783 bytes (98 words) - 18:55, 27 February 2014
  • Superheterodyne
    ...in radio communications, converts information at a low frequency to a high frequency suitable for transmission. On reception, it reverses the process. Typically ...t frequency'' from the local oscillator, and the known unmodulated carrier frequency.
    974 bytes (143 words) - 16:23, 30 March 2024
  • Frequency/Related Articles
    {{r|ITU frequency bands}} {{r|IEEE frequency bands}}
    362 bytes (44 words) - 12:21, 25 June 2012
  • GRC-193/Definition
    ...vehicle-mounted medium to high power (100-400W) [[ITU Frequency Bands|High Frequency (HF)]] radio transceiver; uses [[TSEC/KY-99]] and [[TSEC/KG-84]] for secure
    267 bytes (37 words) - 00:03, 28 July 2010
  • Modulation/Related Articles
    {{r|Frequency modulation}} {{r|Beat frequency}}
    291 bytes (32 words) - 08:05, 20 May 2008
  • FPS-49/Definition
    ...with a large parabolic antenna, operating in the [[ITU Frequency Bands|VHF frequency spectrum]], which was the initial tracking component of the [[Ballistic Mis
    294 bytes (40 words) - 00:54, 23 July 2010
  • Radio
    ...ncy of the carrier wave is usually associated with a [[ITU frequency bands|frequency band]]. The information may be [[voice]], [[data]], [[imagery]] or instrume ==Radio frequency aspects==
    1 KB (183 words) - 12:46, 30 March 2024
  • IEEE frequency bands/Related Articles
    Auto-populated based on [[Special:WhatLinksHere/IEEE frequency bands]]. Needs checking by a human. {{r|EU-NATO-US frequency bands}}
    658 bytes (89 words) - 17:21, 11 January 2010
  • Cauchy moment/Definition
    ...the frequency-dependent polarizability α(ω) in even powers of frequency ω.
    221 bytes (32 words) - 09:21, 27 July 2008
  • Superheterodyne/Definition
    ...is mixed with a locally generated signal and converted to an intermediate frequency in order to facilitate amplification and the rejection of unwanted signals.
    261 bytes (39 words) - 05:26, 4 September 2009
  • Frequency modulation
    ...tic signal of constant frequency -- the "carrier wave" -- by changing the frequency in proportion to the instantaneous strength of the information signal to be
    546 bytes (86 words) - 22:47, 21 May 2008
  • Amplitude modulation/Related Articles
    {{r|Beat frequency}} {{r|Beat frequency oscillator}}
    280 bytes (34 words) - 08:27, 20 May 2008
  • Wavelength
    ...;) can be determined from the wave speed ( '''''c''''' ) and [[frequency]] ( '''''f''''' ): ...]]). Rounding to convenient values for [[radio]] waves, 300 divided by the frequency in megahertz (Mhz) gives the wavelength in [[meter]]s:
    1 KB (207 words) - 19:41, 21 July 2020
  • Frequencies
    #REDIRECT [[Frequency]]
    23 bytes (2 words) - 17:08, 7 April 2010
  • 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
  • RFID
    #REDIRECT [[Radio Frequency Identification]]
    44 bytes (4 words) - 16:02, 3 February 2009
  • High-frequency
    #REDIRECT [[ITU frequency bands]]
    33 bytes (4 words) - 06:50, 19 November 2011
  • 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
  • Radio-Frequency Identification
    #REDIRECT [[Radio Frequency Identification]]
    44 bytes (4 words) - 19:07, 2 February 2009
  • ITU Frequency Bands
    #REDIRECT [[ITU frequency bands]]
    33 bytes (4 words) - 06:39, 21 May 2008
  • High frequency
    #REDIRECT [[ITU frequency bands]]
    33 bytes (4 words) - 06:50, 19 November 2011
  • Talk:RFID
    #REDIRECT [[Talk:Radio Frequency Identification]]
    49 bytes (5 words) - 16:03, 3 February 2009
  • Talk:Radio-Frequency Identification
    #REDIRECT [[Talk:Radio Frequency Identification]]
    49 bytes (5 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
  • User:John R. Brews/Music
    ...png|Audible difference in frequency &Delta;ƒ/ƒ at two sound levels ''vs.'' frequency ƒ.
    879 bytes (131 words) - 04:07, 22 November 2023
  • Talk:Radio Frequency Identification
    ...can use the MOVE command, at the top of the screen, to move RFID to Radio frequency identification, and then create an enty for RFID that contains the line <nowiki>#REDIRECT [[Radio frequency identification]]</nowiki>
    2 KB (339 words) - 19:07, 2 February 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
  • Probe/Definition
    A simple test device to detect radio frequency oscillation in an electronic circuit.
    121 bytes (16 words) - 18:41, 30 September 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
  • SSQ-53/Definition
    Directional frequency analysis and recording (DIFAR) passive [[sonobuoy]] family built for the [[
    153 bytes (18 words) - 01:18, 1 February 2011
  • 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
  • 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
  • Template:Infobox Named passenger train
    | frequency =
    380 bytes (18 words) - 16:02, 14 May 2023
  • Template:Infobox Named passenger trains
    | frequency =
    381 bytes (18 words) - 16:03, 14 May 2023
  • Template:Infobox Santa Fe named train
    | frequency =
    379 bytes (19 words) - 16:04, 14 May 2023
  • 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
  • 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
  • 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
  • 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
  • User:Sam Nazari/Sandbox
    ...quist Sampling Theorem''' is a key result which determines the fundamental frequency that a bandlimited continuous time signal must be [[sampled]] at in order t
    233 bytes (33 words) - 04:40, 22 November 2023
  • 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
View (previous 100 | ) (20 | 50 | 100 | 250 | 500)
Retrieved from "https://citizendium.org/wiki/Special:Search"