S-4: Difference between revisions

166 bytes added ,  25 June 2014
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image=s4-crop.jpg |
image=s4-crop.jpg |
caption=S-4 head |
caption=S-4 head |
series=[[:Category:Sampling plugins|7000/S3 series Sampling Plugins]] |
series=[[:Category:Sampling plugins|7000/3S series Sampling Plugins]] |
years=1968 – ? |
years=1968 – ? |
manuals=
manuals=
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* [http://w140.com/frye_s4_gate.pdf George Frye's Explanation of S-4 sampler in October 1968 Service Scope (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 '''Tektronix S-4''' is a sampling head for 7000- and 3S-series samplers.  It 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 S-4 sampling gate is based upon a traveling wave trapped-charge transmission line in which the sampling window is set by the propagation time of a 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.


==Specifications==
==Specifications==
 
{{BeginSpecs}}
* Rise time: 25 ps  
{{Spec | Rise time | 25 ps }}
* Bandwidth: 14.5 GHz
{{Spec | Bandwidth |14.5 GHz }}
* Input impedance: 50 Ω (SMA port)
{{Spec | Input impedance | 50 Ω (terminated SMA port)}}
* Noise: < 5 mV
{{Spec | Noise | < 5 mV}}
* Provides a trigger pickoff signal for internal triggering
{{Spec | Features |
 
* trigger signal pick-off for internal triggering
}}
{{EndSpecs}}
==Pictures==
==Pictures==
<gallery>
<gallery>