View source for 3S1

{{Plugin Sidebar
|manufacturer=Tektronix 
|series=560-series scopes 
|type=3S1 
|summary=1 GHz sampling plug-in 
|image=3s1_front.jpg 
|caption=Tektronix 3S1
|introduced=1967
|discontinued=(?)
|designers=
|manuals=
* [[Media:070-0632-00.pdf|Tektronix 3S1 Manual]]<br /><small>Alternate:[http://bama.edebris.com/download/tek/3s1/3s1.djvu DjVu @ BAMA]</small>
* [[Media:late_3s1_schematics.pdf|Late 3S1 Schematics]]
* [[Media:Tek 3s1 fcp june 1967.pdf|Tektronix 3S1 Factory Cal Procedure 1967]]
* [[Media:Tek 3s1 cal outline.pdf|Tektronix 3S1 Calibration Outline]] (OCR)
}}
The '''Tektronix 3S1''' is a dual-trace [[sampling_oscilloscope|sampling]] plug-in for [[560-series scopes]].  

In contrast to modular sampling plug-ins like the [[3S2]], the 3S1 has built-in sampling heads.  
The signal enters through [[GR-874 connector]]s on the front panel.  
Each channel has a resistive trigger pickoff followed by a 55 ns coaxial [[delay line]].  
Following the delay line is a compensation circuit designed to (partially) undo the pulse degradation caused by the delay line, and also to provide proper termination for low return loss at the input.  
Next in the main signal path is a four-diode sampling bridge driven by a [[snap-off diode]], D73.  

In many ways, the 3S1 is similar to the [[4S1]], but more compact.

The 3S1 provides [[probe power|+100 V and −12.2 V]] for [[P6032|P6032 cathode-follower probes]].

{{BeginSpecs}}
{{Spec | Rise Time | 350 ps}}
{{Spec | Bandwidth | 1 GHz (calculated) }}
{{EndSpecs}}

==Links==
{{Documents|Link=3S1}}

==Pictures==
<gallery>
3s1_front.jpg|front view
3s1_left.jpg|left view
3s1_right.jpg|right view
3s1_top.jpg|top view
3s1_bottom.jpg|bottom view
</gallery>

==Components==
{{Parts|3S1}}

[[Category:Sampling plugins]]
[[Category:560 series plugins]]
[[Category:GR874]]