NBS 560-Series Random Sampling Timebase: Difference between revisions
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{{Plugin Sidebar | |||
|manufacturer=US National Bureau of Standards | |||
|series=560-series scopes | |||
|type=Random Sampling Timebase | |||
|summary=Random sampling sweep plug-in | |||
|image=Nbs jim andrews random sampling timebase.jpg | |||
|caption=NBS Random Sampling Timebase | |||
|introduced=1972 | |||
|discontinued=(?) | |||
|designers=Jim Andrews | |||
|manuals= | |||
* [[Media:NBSIR73-309 Random Sampling Time Base.pdf|NBSIR 73-309 Random Sampling Oscilloscope Time Base, Jim Andrews, June 1973]] | |||
}} | |||
In 1972, [[Jim Andrews]] was employed by the United States National Bureau of Standards (NBS) and built this | In 1972, [[Jim Andrews]] was employed by the United States National Bureau of Standards (NBS) and built this | ||
'''random sampling timebase for 560-series mainframes'''. | '''random sampling timebase for 560-series mainframes'''. | ||
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Tektronix offered the [[3T2|3T2 random sampling timebase]], but it wasn't intended for very low repetition rates. | Tektronix offered the [[3T2|3T2 random sampling timebase]], but it wasn't intended for very low repetition rates. | ||
A prototype of the instrument was built and a report was written. The report includes schematics. | A prototype of the instrument was built and a report was written. The report includes schematics. | ||
The timebase was intended for use in a Tektronix [[564]] mainframe. | The timebase was intended for use in a Tektronix [[564]] mainframe. | ||
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the trace point by point over a period of time that is longer than the persistence of a non-storage scope. | the trace point by point over a period of time that is longer than the persistence of a non-storage scope. | ||
==Links== | |||
* [[Media:NBSIR73-309 Random Sampling Time Base.pdf|NBSIR 73-309 Random Sampling Oscilloscope Time Base, Jim Andrews, June 1973]] | |||
* Jim Andrews, ''[[Media:Andrews_random_sampling_observe_mercury_switch.pdf|Random Sampling Oscilloscope for the Observation of Mercury Switch Closure Transition Times]]''. IEEE Transactions on Instrumentation and Measurement, Vol. IM-22 No.4, December 1973, p.375+ | |||
==Pictures== | |||
<gallery> | <gallery> | ||
Nbs jim andrews random sampling timebase.jpg | Nbs jim andrews random sampling timebase.jpg | ||
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</gallery> | </gallery> | ||
[[Category:560 series plugins]] | [[Category:560 series plugins]] | ||
[[Category:Sampling plugins]] | [[Category:Sampling plugins]] | ||
[[Category:Third-party products]] | [[Category:Third-party products]] | ||
Latest revision as of 07:20, 6 December 2023
In 1972, Jim Andrews was employed by the United States National Bureau of Standards (NBS) and built this random sampling timebase for 560-series mainframes.
The motivation for this plug-in was that NBS needed to measure pulse signals with fast rise time but very low repetition rate. Tektronix offered the 3T2 random sampling timebase, but it wasn't intended for very low repetition rates. A prototype of the instrument was built and a report was written. The report includes schematics.
The timebase was intended for use in a Tektronix 564 mainframe. The bistable storage of the 564 is essential for the low rep rate measurement, i.e., the ability to accumulate the trace point by point over a period of time that is longer than the persistence of a non-storage scope.
Links
- NBSIR 73-309 Random Sampling Oscilloscope Time Base, Jim Andrews, June 1973
- Jim Andrews, Random Sampling Oscilloscope for the Observation of Mercury Switch Closure Transition Times. IEEE Transactions on Instrumentation and Measurement, Vol. IM-22 No.4, December 1973, p.375+
Pictures
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The power supply is at the left. The board at the top is the strobe predictor. The board at the bottom is the horizontal amplifier.
