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108: Difference between revisions
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{{Instrument Sidebar | |||
|manufacturer=Tektronix | |||
|model=108 | |||
|class=Pulsegenerator | |||
|series= | |||
|summary=1 ns rise-time pulse generator | |||
|image=Tek 108 front.jpg | |||
|caption=Tek 108 front | |||
|introduced=1959 | |||
|discontinued=(?) | |||
|designers= | |||
|manuals= | |||
* [[Media:070-205.pdf|Tektronix 108 Manual]] (PDF) | |||
}} | |||
The '''Tektronix 108''' is a 1 ns rise-time pulse generator | The '''Tektronix 108''' is a 1 ns rise-time pulse generator | ||
intended for calibration of the [[517]]. | intended for calibration of the [[517]]. It is the predecessor of the more complex and faster [[109]]. | ||
Repetition rate of the 108 is 240 Hz and the maximum pulse amplitude is 10 V<sub>p</sub> into a 50 Ω load. | Repetition rate of the 108 is 240 Hz and the maximum pulse amplitude is 10 V<sub>p</sub> into a 50 Ω load. | ||
It uses a [[mercury switch]] and [[selenium rectifiers]]. The output is through an [[N connector]]. | It uses a [[mercury switch]] and [[selenium rectifiers]]. The output is through an [[N connector]]. | ||
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Referring to the output network photo below, current flows in from the left through the 1 kΩ resistor and charges the four red 0.1 μF capacitors in parallel. | Referring to the output network photo below, current flows in from the left through the 1 kΩ resistor and charges the four red 0.1 μF capacitors in parallel. | ||
When the mercury switch (terminals visible at lower right) closes, the capacitors are suddenly connected to the output load of the pulse generator, causing a sharp step in the output voltage. The starting voltage of the step is typically 0 V. The final voltage is adjustable, both in polarity and magnitude. The range is approximately | When the mercury switch (terminals visible at lower right) closes, the capacitors are suddenly connected to the output load of the pulse generator, causing a sharp step in the output voltage. | ||
The starting voltage of the step is typically 0 V. The final voltage is adjustable, both in polarity and magnitude. The range is approximately −10 V to 10 V. | |||
==Pictures== | |||
<gallery> | <gallery> | ||
Tek 108 front.jpg | Front view | Tek 108 front.jpg | Front view | ||
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[[Category:Pulse generators]] | [[Category:Pulse generators]] | ||