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S-4: Difference between revisions
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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 '''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"].) | ||
{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec | Rise time | 25 ps (observed with [[S-50]] or [[S-52]], 35 ps) }} | {{Spec | Rise time | 25 ps (observed with [[S-50]] or [[S-52]], 35 ps) }} | ||
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}} | }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
==Internals== | |||
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. | |||
==Links== | ==Links== | ||