Difference between revisions of "108"

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[[Image:Tek_108.jpg|200px|thumb|right|Tek 108]]
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[[File:Tek 108 front.jpg|thumb|350px|right]]
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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]].
  
The 108 is a 1ns-risetime impulse generator. 
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It is the predecessor of the more complex and faster [[109]].
It is the predecessor of the  
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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.  
more complex and faster [[109]].
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It uses a [[mercury switch]] and [[selenium rectifiers]]. The output is through an [[N connector]].
Repetition rate of the 108 is 240 pps and the  
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maximum pulse amplitude is 10Vpk into 50 Ohm load.  
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The price in July 1959 was $125.
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.  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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* [http://w140.com/tek_108.pdf Tektronix 108 Manual (PDF)]
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<gallery>
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Tek 108 front.jpg | Front view
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Tek 108 schem.png | Schematic
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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
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</gallery>
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[[Category:Pulse generators]]
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[[Category:Introduced in 1959]]

Latest revision as of 06:17, 6 July 2018

Tek 108 front.jpg

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.