067-0508-00: Difference between revisions
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{{Instrument Sidebar | |||
|manufacturer=Tektronix | |||
|model=067-0508-00 | |||
|class=Signal generator | |||
|series= | |||
|summary=Amplitude Calibrator | |||
|image=Tek 067-0508-00 3.jpg | |||
|caption=Tektronix 067-0508-00 | |||
|introduced=(?) | |||
|discontinued=(?) | |||
|designers= | |||
|manuals= | |||
* [[Media:Tek 067-0508-00.pdf|Tektronix 067-0508-00 Manual]] (PDF, OCR) | |||
* [[Media:Tek 067-0508-00 schematics.pdf|Tektronix 067-0508 Schematics]] (PDF) | |||
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* [http://w140.com/tek_067_0508_00.pdf Tektronix 067-0508-00 Manual (PDF)] | * [http://w140.com/tek_067_0508_00.pdf Tektronix 067-0508-00 Manual (PDF)] | ||
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The '''Tektronix 067-0508-00''' Amplitude Calibrator generates a square-wave with two precisely controlled voltages and 50 Ω impedance at both voltages. | |||
This could be achieved by a 50 Ω resistor in series with the output of an amplifier with 0 Ω output resistance (e.g., an opamp with plenty of negative feedback). But that is not how Tektronix did it. | |||
They used a 50 Ω shunt resistance at the output, and a precision DC current source that can be steered toward the output or toward a dummy current sink transistor. | |||
The built-in multivibrator controls the steering of the current. | |||
The output is through a [[GR-874 connector]]. The [[067-0515-00|067-0515-00 precision 50 Ω terminator]] | |||
is intended to be used with the 067-0508-00. | |||
==Pictures== | |||
<gallery> | <gallery> | ||
Tek 067-0508-00 1.jpg | |||
Tek 067-0508-00 2.jpg | |||
Tek 067-0508-00 3.jpg | |||
Tek 284 and 067-0508-00.jpg | 067-0508-00 with [[284]] pulse generator | |||
Tek 067 0508 00-schem.jpg | |||
</gallery> | </gallery> | ||
[[Category:Calibration fixtures]] | |||
[[Category:Amplitude Calibrators]] | |||
Latest revision as of 20:48, 15 November 2023
The Tektronix 067-0508-00 Amplitude Calibrator generates a square-wave with two precisely controlled voltages and 50 Ω impedance at both voltages.
This could be achieved by a 50 Ω resistor in series with the output of an amplifier with 0 Ω output resistance (e.g., an opamp with plenty of negative feedback). But that is not how Tektronix did it. They used a 50 Ω shunt resistance at the output, and a precision DC current source that can be steered toward the output or toward a dummy current sink transistor. The built-in multivibrator controls the steering of the current.
The output is through a GR-874 connector. The 067-0515-00 precision 50 Ω terminator is intended to be used with the 067-0508-00.
Pictures
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067-0508-00 with 284 pulse generator
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