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The Tektronix 108 is a | {{Instrument Sidebar | ||
It is the predecessor of the | |manufacturer=Tektronix | ||
more complex and faster [[109]] | |model=108 | ||
|class=Pulse generator | |||
|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 | |||
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. | |||
It uses a [[mercury switch]] and [[selenium rectifiers]]. The output is through an [[N connector]]. | |||
The price in July 1959 was $125. | |||
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 −10 V to 10 V. | |||
==Pictures== | |||
<gallery> | <gallery> | ||
Tek 108 front.jpg | Front view | |||
Tek 108 schem.png | Schematic | |||
Tek 108 left.jpg|Left view, mercury switch | |||
Tek 108 right.jpg | right view, selenium recitifier | |||
Tek 108 output network.jpg | Output network, rear of N connector | |||
Tek 108 cat.jpg|Page 190 in the 1959 Catalog | |||
Tek 108 mercury switch.png | Mercury switch | |||
</gallery> | </gallery> | ||
[[Category:Pulse generators]] | |||