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7J20: Difference between revisions
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* [[Media:RSS R&D Article 11-1974.pdf|R/D Article - November 1974 (PDF)]] | * [[Media:RSS R&D Article 11-1974.pdf|R/D Article - November 1974 (PDF)]] | ||
* [http://w140.com/tek_7J20_from_1975_cat.pdf Section in 1975 Catalog in 7J20 (PDF)] | * [http://w140.com/tek_7J20_from_1975_cat.pdf Section in 1975 Catalog in 7J20 (PDF)] | ||
* [[Media:TEK 7J20 Advertisement 06-1975.pdf|Tektronix J20/7J20 | * [[Media:TEK 7J20 Advertisement 06-1975.pdf|Tektronix J20/7J20 Advertisement - June 1975 (PDF)]] | ||
* [[Media:Jere marrs rapid-scanning spectrometry.pdf|Jere Marrs, "Rapid-Scanning Spectrometry" (PDF)]] | * [[Media:Jere marrs rapid-scanning spectrometry.pdf|Jere Marrs, "Rapid-Scanning Spectrometry" (PDF)]] | ||
* [[Media:Peter burke fast-scan spectrometry.pdf|Peter Burke "Fast-Scan Spectrometry" (PDF)]] | * [[Media:Peter burke fast-scan spectrometry.pdf|Peter Burke "Fast-Scan Spectrometry" (PDF)]] | ||
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==Internals== | ==Internals== | ||
The instrument is based on a [ | The instrument is based on a [[wikipedia:Monochromator|Czerny-Turner Monochromator]], | ||
in essence a narrow slit followed by a [ | in essence a narrow slit followed by a [[wikipedia:Diffraction grating|diffraction grating]]. | ||
A [ | A [[wikipedia:Vidicon|vidicon tube]] scans the optical spectrum | ||
and produces a periodic electric signal which is then displayed by the scope mainframe. | and produces a periodic electric signal which is then displayed by the scope mainframe. | ||
[[File:7J20-principle.jpg | thumb | 400px | center | Operating principle (click to enlarge) ]] | [[File:7J20-principle.jpg | thumb | 400px | center | Operating principle (click to enlarge) ]] | ||
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the [[155-0106-00]] (U1550 and U1590), | the [[155-0106-00]] (U1550 and U1590), | ||
which implements an interpolated lookup table. | which implements an interpolated lookup table. | ||
Inside the | Inside the J20, there are 40 trimmer potentiometers that allow the lookup function to be tweaked | ||
so that the horizontal scale of the system is accurate. | so that the horizontal scale of the system is accurate. | ||
[[File:Tek_j20_interim_normalizer2.png | thumb | 400px | center | Normalizer (click to enlarge) ]] | [[File:Tek_j20_interim_normalizer2.png | thumb | 400px | center | Normalizer (click to enlarge) ]] | ||
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==Links== | ==Links== | ||
* [https://youtube.com/watch?v=7zR4Os6JEac | * [https://youtube.com/watch?v=7zR4Os6JEac 7J20 in operation @ VintageTek Museum] (YouTube) | ||
==Pictures== | ==Pictures== | ||
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Tek j20 internal 6.jpg|J20 | Tek j20 internal 6.jpg|J20 | ||
Tek j20 front 1.jpg|J20 | Tek j20 front 1.jpg|J20 | ||
Tek 7j20 1.jpg|7J20 | |||
Tek 7j20 2.jpg|7J20 | |||
Tek 7j20 3.jpg|7J20 | |||
Tek 7j20 4.jpg|7J20 | |||
Tek 7j20 5.jpg|7J20 | |||
Tek 7j20 6.jpg|7J20 | |||
Tektronix-J20 UV Fiber Optic Sensor-Full-lores.JPG | J20 UV Fiber Optic Sensor | |||
Tektronix-J20 UV Fiber Optic Sensor-Head-lores.JPG | J20 UV Fiber Optic Sensor Head | |||
Tektronix-J20 UV Fiber Optic Sensor-Slit-lores.JPG | J20 UV Fiber Optic Sensor Slit | |||
Tektronix-J20 Ring Adapter-Face-hires.JPG | J20 Mounting Ring Adapter Face | |||
Tektronix-J20 UV Fiber Optic Sensor-Ring Adpapter-Back-hires.JPG |J20 Mounting Ring Adapter Back | |||
Tektronix-J20 UV Fiber Optic Sensor-Ring Adpater-Side-hires.JPG |J20 Mounting Ring Adapter Side | |||
</gallery> | </gallery> | ||
[[Category:7000 series combined plugins]] | [[Category:7000 series combined plugins]] | ||
[[Category:7000 series special-function plugins]] | [[Category:7000 series special-function plugins]] | ||
[[Category:Spectrum | [[Category:Spectrum analyzers]] | ||
[[Category:Optoelectronic instruments]] | [[Category:Optoelectronic instruments]] | ||
[[Category:Specifications needed]] | [[Category:Specifications needed]] | ||