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| (Nu s-a afișat o versiune intermediară efectuată de același utilizator) |
| Linia 1: |
Linia 1: |
| OCXO -- Oven Controlled Crystal Oscillator | | OCXO -- Oven Controlled Crystal Oscillator |
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| ===Comparison with other frequency standards===
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| {| class="wikitable sortable" style="text-align:right;"
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| !align=left| Oscillator Type[[#fn ho osctype|*]]
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| !align=left| Accuracy[[#fn ho acc|**]]
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| !align=left| Aging / 10 year
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| !align=left| Radiation per [[Rad (unit)|RAD]]
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| !align=left| Power
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| !align=left| Weight
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| |-
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| |align=left| [[Crystal oscillator]] (XO)<ref name="ieee_li-precision_frequency_generation" />
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| | {{ntsh|00010000000}} 10<sup>−5</sup> to 10<sup>−4</sup>
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| | {{ntsh|0000200000000}} 10-20 [[Parts per million|PPM]]
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| | {{ntsh|-200}} -2 × 10<sup>−12</sup>
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| | {{ntsh|000020}} 20 µW
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| | {{ntsh|20}} 20 gram
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| |-
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| |align=left| [[Crystal oscillator|Temperature compensated crystal oscillator]] (TCXO)<ref name="ieee_li-precision_frequency_generation" />
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| | {{ntsh|00000100000}} 10<sup>−6</sup>
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| | {{ntsh|0000050000000}} 2-5 PPM
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| | {{ntsh|-200}} -2 × 10<sup>−12</sup>
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| | {{ntsh|000100}} 100 µW
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| | {{ntsh|50}} 50 gram
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| |-
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| |align=left| [[Crystal oscillator|Microcomputer compensated crystal oscillator]] (MCXO)<ref name="ieee_li-precision_frequency_generation" />
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| | {{ntsh|00000010000}} 10<sup>−8</sup> to 10<sup>−7</sup>
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| | {{ntsh|0000030000000}} 1-3 PPM
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| | {{ntsh|-200}} -2 × 10<sup>−12</sup>
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| | {{ntsh|000200}} 200 µW
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| | {{ntsh|100}} 100 gram
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| |-
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| |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}}
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| | {{ntsh|00000050000}} {{nowrap|2 × 10<sup>−8</sup>}}<br/> {{nowrap|5 × 10<sup>−7</sup>}}
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| | {{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>}}
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| | {{ntsh|-200}} -2 × 10<sup>−12</sup>
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| | {{ntsh|2000000}} {{nowrap|1 - 3 W}}
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| | {{ntsh|350}} {{nowrap|200 - 500 gram}}
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| |align=left| [[Rubidium standard|Rubidium atomic frequency standard]] (RbXO)<ref name="ieee_li-precision_frequency_generation" />
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| | {{ntsh|00000000100}} 10<sup>−9</sup>
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| | {{ntsh|0000000050000}} 5 × 10<sup>−10</sup> to 5 × 10<sup>−9</sup>
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| | {{ntsh|020}} 2 × 10<sup>−13</sup>
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| | {{ntsh|9000000}} {{nowrap|6 - 12 W}}
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| | {{ntsh|2000}} {{nowrap|1500 - 2500 gram}}
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| |-
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| |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>
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| | {{ntsh|00000000001}} {{nowrap|10<sup>−12</sup> to 10<sup>−11</sup>}}
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| | {{ntsh|0000000000100}} 10<sup>−12</sup> to 10<sup>−11</sup>
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| | {{ntsh|002}} 2 × 10<sup>−14</sup>
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| | {{ntsh|32500000}} {{nowrap|25 - 40 W}}
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| | {{ntsh|15000}} {{nowrap|10 000 - 20 000 gram}}
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| |-
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| |align=left| [[Global Positioning System]] (GPS)<!--Page4-->
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| | {{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>
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| | {{ntsh|0000000000001}} {{nowrap|10<sup>−13</sup>}}
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| | {{ntsh|4000000}} {{nowrap|4 W}}
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| | {{ntsh|340}} {{nowrap|340 gram}}
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| |-
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| |align=left| [[Time signal|Radio time signal]] ([[DCF77]])
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| | {{ntsh|01000000000}}
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| | {{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>
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| | {{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>
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| | {{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>
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| |}
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| <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>
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| <sup id="fn_ho_acc">** Including the effects of military environments and one year of aging.</sup>
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| ===TODOs=== | | ===TODOs=== |
| * Poate traduci în română pagina de pe Wikipedia ? ;) | | * Poate traduci în română pagina de pe Wikipedia ? ;) |
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| ==Legături Externe== | | ==Legături Externe== |
| * [https://en.wikipedia.org/wiki/Crystal_oven OCXO pe Wikipedia] | | * [https://en.wikipedia.org/wiki/Crystal_oven OCXO pe Wikipedia] |
OCXO -- Oven Controlled Crystal Oscillator
TODOs
- Poate traduci în română pagina de pe Wikipedia ? ;)
Legături Externe