4551: Difference between revisions
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* [[Media:Tektronix 4551 in 1971 catalog.pdf|Tektronix 4551 Description in 1971 Catalog]] | * [[Media:Tektronix 4551 in 1971 catalog.pdf|Tektronix 4551 Description in 1971 Catalog]] | ||
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The '''Tektronix 4551''' is a light pen system. | The '''Tektronix 4551''' is a light pen system. When used in any 525/60 or 625/50 line TV system, it produces a cursor overlaid on the TV image that tracks the position of a pen as the user moves it across the TV screen. | ||
It is also designed to interface directly with a [[4501|4501 scan converter]] in a configuration enabling the user to "write" on the image. | |||
When the user presses the pen against the display, a switch in the pen tip activates the write function, converting | |||
pen movements to stored images on the 4501. The 4501 scanned the stored image and produces an [[NTSC]] output. | |||
{{MissingSpecs}} | {{MissingSpecs}} | ||
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==Links== | ==Links== | ||
{{Documents|Link=4551}} | {{Documents|Link=4551}} | ||
{{PatentLinks|4551}} | |||
==Prices== | |||
$1,800 in 1971 (~$14,200 in 2025 dollars) | |||
==Internals== | |||
The pen is passive, it has a fiberoptic connection to the base unit where a [[tube:931a|931A photomultiplier]] is used as the light detector. | |||
==Pictures== | |||
[[Category:Computer peripherals]] | [[Category:Computer peripherals]] | ||
Latest revision as of 15:17, 21 March 2025
The Tektronix 4551 is a light pen system. When used in any 525/60 or 625/50 line TV system, it produces a cursor overlaid on the TV image that tracks the position of a pen as the user moves it across the TV screen.
It is also designed to interface directly with a 4501 scan converter in a configuration enabling the user to "write" on the image. When the user presses the pen against the display, a switch in the pen tip activates the write function, converting pen movements to stored images on the 4501. The 4501 scanned the stored image and produces an NTSC output.
Key Specifications
- please add
Links
Documents Referencing 4551
| Document | Class | Title | Authors | Year | Links |
|---|---|---|---|---|---|
| History of the Information Display Division - John Lamb, June 1974.pdf | Article | History of the Information Display Division | John Lamb | 1974 | Information Display Division • 601 • 611 • 602 • 4002 • 4501 • 4005 • 4601 • 4901 • 4951 • 4002A • 4551 • 4701 • Tekplot • 4602 • 4010 • 4610 • 4911 • 4912 • 613 • 4903 • 4012 • 4013 • 4014 • 4015 • 4023 • 4503 • 4921 • 4922 • 4953 • 4954 |
Patents that may apply to 4551
| Page | Title | Inventors | Filing date | Grant date | Links |
|---|---|---|---|---|---|
| Patent US 3594608A | Electron beam display system having light detector pen with associated sampling and memory circuits | Jon C. Mutton | 1969-05-12 | 1971-07-20 | 4551 |
Prices
$1,800 in 1971 (~$14,200 in 2025 dollars)
Internals
The pen is passive, it has a fiberoptic connection to the base unit where a 931A photomultiplier is used as the light detector.