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The '''Tektronix 3S1''' is a dual-trace [[sampling_oscilloscope|sampling]] plug-in for [[560-series scopes]]. | The '''Tektronix 3S1''' is a dual-trace [[sampling_oscilloscope|sampling]] plug-in for [[560-series scopes]]. | ||
In many ways, the 3S1 is similar to the [[4S1]], but more compact. | In many ways, the 3S1 is similar to the [[4S1]], but more compact. | ||
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==Links== | ==Links== | ||
{{Documents|Link=3S1}} | {{Documents|Link=3S1}} | ||
==Internals== | |||
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. | |||
==Pictures== | ==Pictures== | ||