S-4: Difference between revisions

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S-4 (view source)

Revision as of 06:31, 18 May 2014

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m (moved S4 to S-4: Standard Tek designation as printed on face plate includes the dash)
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The S-4 was designed by George Frye and [[introduced in 1968]]. The S4 sampling plug-in head provides one 50-ohm SMA input port with a 25ps risetime and a bandwidth of 14.5GHz. The unit provides a trigger pickoff signal for internal triggering and is specified for less than 5mV of noise. The S4 is the fastest of the S-series plug-in samplers. A interesting comparison of different sampling heads is found in [http://www.picosecond.com/objects/AN-02a.pdf "AN-3042a, Revision 1, 2/89"].  
{{Plugin Sidebar |
title=Tektronix S-4 |
summary=Sampling Head |
image=s4-crop.jpg |
caption=S-4 head |
series=[[:Category:Sampling plugins|7000/S3 series Sampling Plugins]] |
years=1968 – ? |
manuals=
* [http://w140.com/tek_s4.pdf Tektronix S-4 Manual, copyright 1969 (PDF)]
* [http://w140.com/tek_S4_1985.pdf Tektronix S-4 Manual, revised 1985 (PDF)]
* [http://w140.com/frye_s4_gate.pdf George Frye's Explanation of S-4 sampler in October 1968 Service Scope (PDF)]
}}
The S-4 was designed by George Frye and [[introduced in 1968]]. It is the fastest of the S-series plug-in samplers. (An interesting comparison of different sampling heads is found in [http://www.picosecond.com/objects/AN-02a.pdf "AN-3042a, Revision 1, 2/89"].)


The S4 sampling gate is based upon a traveling wave trapped-charge transmission line in which the sampling window is set by the propagation time of pulse edge through a thick-film transmission line. This technique requires only a sharp pulse edge rather than a precise pulse width, which is harder to generate.
The S4 sampling gate is based upon a traveling wave trapped-charge transmission line in which the sampling window is set by the propagation time of pulse edge through a thick-film transmission line. This technique requires only a sharp pulse edge rather than a precise pulse width, which is harder to generate.
The sampling diodes are housed in a special coaxial connector that provides a high bandwidth signal path.
The sampling diodes are housed in a special coaxial connector that provides a high bandwidth signal path.


* [http://w140.com/tek_s4.pdf Tektronix S-4 Manual, copyright 1969 (PDF)]
==Specifications==
* [http://w140.com/tek_S4_1985.pdf Tektronix S-4 Manual, revised 1985 (PDF)]
 
* [http://w140.com/frye_s4_gate.pdf George Frye's Explanation of S-4 sampler in October 1968 Service Scope (PDF)]
* Rise time: 25 ps
* Bandwidth: 14.5 GHz
* Input impedance: 50 Ω (SMA port)
* Noise: < 5 mV
* Provides a trigger pickoff signal for internal triggering
 
==Pictures==
<gallery>
<gallery>
Image:Tek s4.jpg
Image:Tek s4.jpg
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Image:S4 schem.png|Schematic
Image:S4 schem.png|Schematic
</gallery>
</gallery>
[[Category:7000 and 3S series sampling heads]]
Retrieved from "https://w140.com/tekwiki/wiki/Special:MobileDiff/9545"

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