S-4: Difference between revisions
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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/ | 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)] | ||
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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 | 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}} | |||
{{Spec | Rise time | 25 ps }} | |||
{{Spec | Bandwidth |14.5 GHz }} | |||
{{Spec | Input impedance | 50 Ω (terminated SMA port)}} | |||
{{Spec | Noise | < 5 mV}} | |||
* | {{Spec | Features | | ||
* trigger signal pick-off for internal triggering | |||
}} | |||
{{EndSpecs}} | |||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
Revision as of 23:35, 25 June 2014
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 "AN-3042a, Revision 1, 2/89".)
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.
Specifications
Key Specifications
| Rise time | 25 ps |
|---|---|
| Bandwidth | 14.5 GHz |
| Input impedance | 50 Ω (terminated SMA port) |
| Noise | < 5 mV |
| Features |
|
Pictures
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Top view of the S4 plug-in
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Left view
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Right view
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Schematic
