Difference between revisions of "108"

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The Tektronix 108 is a 1ns-risetime pulse generator.   
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{{Instrument Sidebar
It is the predecessor of the  
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|manufacturer=Tektronix
more complex and faster [[109]].
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|model=108
Repetition rate of the 108 is 240 pps and the
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|class=Pulse generator
maximum pulse amplitude is 10Vpk into 50 Ohm load.
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|series=
The price in July 1959 was $125.  The output is through an
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|summary=1 ns rise-time pulse generator
[[Connectors#N|N connector]].
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|image=Tek 108 front.jpg
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|caption=Tek 108 front
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|introduced=1959
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|discontinued=(?)
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|designers=
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|manuals=
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* [[Media:070-205.pdf|Tektronix 108 Manual]] (PDF)
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}}
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The '''Tektronix 108''' is a 1 ns rise-time pulse generator  
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intended for calibration of the [[517]].  It is the predecessor of the more complex and faster [[109]].
  
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Repetition rate of the 108 is 240 Hz and the maximum pulse amplitude is 10 V<sub>p</sub> into a 50 Ω load.
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It uses a [[mercury switch]] and [[selenium rectifiers]]. The output is through an [[N connector]].
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The price in July 1959 was $125. 
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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.
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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. 
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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.
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==Pictures==
 
<gallery>
 
<gallery>
Image:Tek 108 front.jpg
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Tek 108 front.jpg | Front view
Image:Tek 108 left.jpg
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Tek 108 schem.png | Schematic
Image:Tek 108 right.jpg
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Tek 108 left.jpg|Left view, mercury switch
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Tek 108 right.jpg | right view, selenium recitifier
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Tek 108 output network.jpg | Output network, rear of N connector
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Tek 108 cat.jpg|Page 190 in the 1959 Catalog
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Tek 108 mercury switch.png | Mercury switch
 
</gallery>
 
</gallery>
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[[Category:Pulse generators]]

Latest revision as of 07:05, 18 August 2021

Tektronix 108
1 ns rise-time pulse generator
Tek 108 front

Produced from 1959 to (?)

Manuals
(All files in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

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 Vp 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