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OCXO -- Oven Controlled Crystal Oscillator
OCXO -- Oven Controlled Crystal Oscillator
===Comparison with other frequency standards===
{| class="wikitable sortable" style="text-align:right;"
!align=left| Oscillator Type[[#fn ho osctype|*]]
!align=left| Accuracy[[#fn ho acc|**]]
!align=left| Aging / 10 year
!align=left| Radiation per [[Rad (unit)|RAD]]
!align=left| Power
!align=left| Weight
|-
|align=left| [[Crystal oscillator]] (XO)<ref name="ieee_li-precision_frequency_generation" />
| {{ntsh|00010000000}} 10<sup>−5</sup> to 10<sup>−4</sup>
| {{ntsh|0000200000000}} 10-20 [[Parts per million|PPM]]
| {{ntsh|-200}} -2 × 10<sup>−12</sup>
| {{ntsh|000020}} 20&nbsp;µW
| {{ntsh|20}} 20 gram
|-
|align=left| [[Crystal oscillator|Temperature compensated crystal oscillator]] (TCXO)<ref name="ieee_li-precision_frequency_generation" />
| {{ntsh|00000100000}} 10<sup>−6</sup>
| {{ntsh|0000050000000}} 2-5 PPM
| {{ntsh|-200}} -2 × 10<sup>−12</sup>
| {{ntsh|000100}} 100&nbsp;µW
| {{ntsh|50}} 50 gram
|-
|align=left| [[Crystal oscillator|Microcomputer compensated crystal oscillator]] (MCXO)<ref name="ieee_li-precision_frequency_generation" />
| {{ntsh|00000010000}} 10<sup>−8</sup> to 10<sup>−7</sup>
| {{ntsh|0000030000000}} 1-3 PPM
| {{ntsh|-200}} -2 × 10<sup>−12</sup>
| {{ntsh|000200}} 200&nbsp;µW
| {{ntsh|100}} 100 gram
|-
|align=left| Oven controlled crystal oscillator (OCXO)<ref name="ieee_li-precision_frequency_generation" /><br/>- {{nowrap|5 - 10 MHz}}<br/>{{nowrap|- 15 to 100 MHz}}
| {{ntsh|00000050000}} {{nowrap|2 × 10<sup>−8</sup>}}<br/> {{nowrap|5 × 10<sup>−7</sup>}}
| {{ntsh|0000002000000}} {{nowrap|2 × 10<sup>−8</sup> to 2 × 10<sup>−7</sup>}}<br/>{{nowrap|2 × 10<sup>−6</sup> to 11 × 10<sup>−9</sup>}}
| {{ntsh|-200}} -2 × 10<sup>−12</sup>
| {{ntsh|2000000}} {{nowrap|1 - 3 W}}
| {{ntsh|350}} {{nowrap|200 - 500 gram}}
|-
|align=left| [[Rubidium standard|Rubidium atomic frequency standard]] (RbXO)<ref name="ieee_li-precision_frequency_generation" />
| {{ntsh|00000000100}} 10<sup>−9</sup>
| {{ntsh|0000000050000}} 5 × 10<sup>−10</sup> to 5 × 10<sup>−9</sup>
| {{ntsh|020}} 2 × 10<sup>−13</sup>
| {{ntsh|9000000}} {{nowrap|6 - 12 W}}
| {{ntsh|2000}} {{nowrap|1500 - 2500 gram}}
|-
|align=left| [[Caesium standard|Caesium atomic frequency standard]]<!-- Page 4 --><ref name="ieee_li-precision_frequency_generation">{{cite web|title=Tutorial Precision Frequency Generation Utilizing OCXO and Rubidium Atomic Standards with Applications for Commercial, Space, Military, and Challenging Environments IEEE Long Island Chapter March 18, 2004|url=http://www.ieee.li/pdf/viewgraphs/precision_frequency_generation.pdf|access-date=2009-11-16|website=ieee.li}}</ref>
| {{ntsh|00000000001}} {{nowrap|10<sup>−12</sup> to 10<sup>−11</sup>}}
| {{ntsh|0000000000100}} 10<sup>−12</sup> to 10<sup>−11</sup>
| {{ntsh|002}} 2 × 10<sup>−14</sup>
| {{ntsh|32500000}} {{nowrap|25 - 40 W}}
| {{ntsh|15000}} {{nowrap|10 000 - 20 000 gram}}
|-
|align=left| [[Global Positioning System]] (GPS)<!--Page4-->
| {{ntsh|00000004000}} {{nowrap|4 × 10<sup>−8</sup> to 10<sup>−11</sup>}}<br/><!--Page2--><ref name="spectruminstruments_net-tm3specs">{{cite web|title=Time and Frequency - Precisely the Way You Need It|url=http://www.spectruminstruments.net/tm3specs.pdf|access-date=2009-11-18|website=spectruminstruments.net}}</ref><ref name="leapsecond_ds58540a">{{cite web|title=GPS Time and Frequency Reference Receiver|url=http://www.leapsecond.com/museum/hp58540a/ds-58540a.pdf|access-date=2009-11-18|website=leapsecond.com}}</ref>
| {{ntsh|0000000000001}} &nbsp;{{nowrap|10<sup>−13</sup>}}
|
| {{ntsh|4000000}} {{nowrap|4 W}}
| {{ntsh|340}} {{nowrap|340 gram}}
|-
|align=left| [[Time signal|Radio time signal]] ([[DCF77]])
| {{ntsh|01000000000}}
| {{ntsh|0000000000004}} {{nowrap|4 × 10<sup>−13</sup>}}<!--Page97--><ref name="vtt_fi_S235">{{cite web|title=URSI/IEEE XXIX Convention on Radio Science, Espoo, Finland, November 1-2, 2004|url=http://www.vtt.fi/inf/pdf/symposiums/2004/S235.pdf|access-date=2009-11-18|website=vtt.fi}}</ref>
|
| {{ntsh|4600000}} {{nowrap|4.6 W}}<ref name="meinberg_de-c51">{{cite web|title=Serial DCF77 radio clock Meinberg C51|url=http://www.meinberg.de/english/products/c51.htm|access-date=2009-11-18|website=meinberg.de}}</ref>
| {{ntsh|87}} {{nowrap|87 gram}}<ref name="wearable_ethz_ch-summer07_DCF77">{{cite web|title=ETH - IfE-Wearable Computing - Miniature pocket-worn motion sensor with DCF77 clock|url=http://www.wearable.ethz.ch/education/sada/summer07_DCF77|access-date=2009-11-18|website=wearable.ethz.ch}}</ref>
|}
<sup id="fn_ho_osctype">* Sizes range from {{nowrap|<5 cm<sup>3</sup>}} for clock oscillators to >30 liters for [[Caesium|Cs]] standards. Costs range from {{nowrap|<5 US$}} for clock oscillators to {{nowrap|>40 000 US$}} for Cs standards.</sup>
<sup id="fn_ho_acc">** Including the effects of military environments and one year of aging.</sup>
===TODOs===
===TODOs===
* Poate traduci în română pagina de pe Wikipedia ? ;)
* Poate traduci în română pagina de pe Wikipedia ? ;)

Versiunea de la data 10 ianuarie 2020 13:50

OCXO -- Oven Controlled Crystal Oscillator

Comparison with other frequency standards

Oscillator Type* Accuracy** Aging / 10 year Radiation per RAD Power Weight
Crystal oscillator (XO)[1] Format:Ntsh 10−5 to 10−4 Format:Ntsh 10-20 PPM Format:Ntsh -2 × 10−12 Format:Ntsh 20 µW Format:Ntsh 20 gram
Temperature compensated crystal oscillator (TCXO)[1] Format:Ntsh 10−6 Format:Ntsh 2-5 PPM Format:Ntsh -2 × 10−12 Format:Ntsh 100 µW Format:Ntsh 50 gram
Microcomputer compensated crystal oscillator (MCXO)[1] Format:Ntsh 10−8 to 10−7 Format:Ntsh 1-3 PPM Format:Ntsh -2 × 10−12 Format:Ntsh 200 µW Format:Ntsh 100 gram
Oven controlled crystal oscillator (OCXO)[1]
- Format:Nowrap
Format:Nowrap 		Format:Ntsh Format:Nowrap
Format:Nowrap 		Format:Ntsh Format:Nowrap
Format:Nowrap 		Format:Ntsh -2 × 10−12 Format:Ntsh Format:Nowrap Format:Ntsh Format:Nowrap
Rubidium atomic frequency standard (RbXO)[1] Format:Ntsh 10−9 Format:Ntsh 5 × 10−10 to 5 × 10−9 Format:Ntsh 2 × 10−13 Format:Ntsh Format:Nowrap Format:Ntsh Format:Nowrap
Caesium atomic frequency standard[1] Format:Ntsh Format:Nowrap Format:Ntsh 10−12 to 10−11 Format:Ntsh 2 × 10−14 Format:Ntsh Format:Nowrap Format:Ntsh Format:Nowrap
Global Positioning System (GPS) Format:Ntsh Format:Nowrap
[2][3] 		Format:Ntsh  Format:Nowrap Format:Ntsh Format:Nowrap Format:Ntsh Format:Nowrap
Radio time signal (DCF77) Format:Ntsh Format:Ntsh Format:Nowrap[4] Format:Ntsh Format:Nowrap[5] Format:Ntsh Format:Nowrap[6]

* Sizes range from Format:Nowrap for clock oscillators to >30 liters for Cs standards. Costs range from Format:Nowrap for clock oscillators to Format:Nowrap for Cs standards.

** Including the effects of military environments and one year of aging.


TODOs

  • Poate traduci în română pagina de pe Wikipedia ? ;)

Legături Externe

  1. ↑ 1,0 1,1 1,2 1,3 1,4 1,5 Format:Cite web
  2. ↑ Format:Cite web
  3. ↑ Format:Cite web
  4. ↑ Format:Cite web
  5. ↑ Format:Cite web
  6. ↑ Format:Cite web
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