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067-0657-00: Difference between revisions
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The calibration fixture is triggered from an external signal (such as a trigger output from a time-mark generator) applied to the front-panel TRIG IN connector. | The calibration fixture is triggered from an external signal (such as a trigger output from a time-mark generator) applied to the front-panel TRIG IN connector. | ||
==Internals== | |||
The 067-0657-00 was the result of some fundamental research by [[Bruce Hofer]] inspired by production issues in the calibration of early [[7904]] scopes. This lead to a new sweep circuit that uses current steering in a differential pair to start the charging of the timing capacitor as is discussed in [[Patent_US_4009399A|patent 4009399]]. The sweep circuit in the 067-0657-00 follows the patent application but does not implement the baseline stability circuit, which was incorporated in the [[7B92A]]. | |||
==Links== | ==Links== | ||
* [[Bruce Hofer]], ''[https://vintagetek.org/years-at-tektronix-hofer/ My Years at Tektronix] | * [[Bruce Hofer]], ''[https://vintagetek.org/years-at-tektronix-hofer/ My Years at Tektronix] | ||
* [https://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_special/067-0657-00%20067-0657-99/067-0657-99_067-0657-00.html 067-0657-xx @ amplifier.cd] | * [https://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_special/067-0657-00%20067-0657-99/067-0657-99_067-0657-00.html 067-0657-xx @ amplifier.cd] | ||
* [[Patent_US_4009399A| US Patent 4009399 Gated Ramp Generator]] | |||
==Pictures== | ==Pictures== | ||