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1S1: Difference between revisions
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title=Tektronix 1S1| | title=Tektronix 1S1| | ||
summary=Sampling system| | summary=Sampling system| | ||
image= | image=1s1 front details.JPG | | ||
caption=1S1 front view| | caption=1S1 front view| | ||
introduced=1965 | | introduced=1965 | | ||
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* [[1S1/Repairs|David Wise 1S1 Repair Notes]] | * [[1S1/Repairs|David Wise 1S1 Repair Notes]] | ||
}} | }} | ||
The '''Tektronix 1S1''' is a [[sampling oscilloscope|sampling]] plug-in for [[500-series scopes]]. | The '''Tektronix 1S1''' is a [[sampling oscilloscope|sampling]] plug-in for [[500-series scopes]], designed by [[Chuck Edgar]], [[introduced in 1965]] and sold through 1973. | ||
It is essentially one channel of a sampling unit and a timing unit from a [[661]]. It has its own trigger and timebase. | It is essentially one channel of a sampling unit and a timing unit from a [[661]]. It has its own trigger and timebase. | ||
The oscilloscope's timebase is usually set to a relatively slow sweep rate when using a 1S1. Alternatively, the sweep on the oscilloscope can | The oscilloscope's timebase is usually set to a relatively slow sweep rate when using a 1S1. Alternatively, the sweep | ||
and the horizontal voltage from the oscilloscope can be used to control the 1S1, as described below. | on the oscilloscope can free-run, and the horizontal voltage from the oscilloscope can be used to control the 1S1, as described below. | ||
The 1S1 has a 50 Ω [[GR-874 connector]] for signal input. The plug-in supplies power (+100 V and −12.6 V) to accessories like the [[P6032]] Cathode Follower Probe, the [[281]] TDR Pulser, and the [[282]] | The 1S1 has a 50 Ω [[GR-874 connector]] for the signal input. The plug-in supplies power (+100 V and −12.6 V) to accessories like | ||
the [[P6032]] Cathode Follower Probe, the [[281]] TDR Pulser, and the [[282|Type 282 Probe Adapter]], which is an active buffer to | |||
allow the use of high-impedance probes with the 50 Ω input of the 1S1 (at reduced bandwidth). | |||
{{MissingSpecs}} | |||
==Operation== | |||
The 1S1 can operate in normal self-swept mode or an external sweep signal can be applied to the 1S1. | The 1S1 can operate in normal self-swept mode or an external sweep signal can be applied to the 1S1. | ||
With the 1S1's internal sweep disabled, the horizontal-in and vertical-out connections can be used | With the 1S1's internal sweep disabled, the horizontal-in and vertical-out connections can be used | ||
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The horizontal-in voltage can also be produced, in "manual" mode, by setting a knob on the 1S1. | The horizontal-in voltage can also be produced, in "manual" mode, by setting a knob on the 1S1. | ||
When the 1S1 is set for INT trigger signal, the EXT TRIG input is terminated with 50 Ω. | |||
==Internals== | |||
The sampler in the 1S1 is quite different from the sampler in the [[1S2]]. The 1S1 uses a [[sampling diodes|four-diode]] sampling bridge, terminated within the 1S1. The 1S2 uses a two-diode feed-through sampler, typical for TDR instruments. | The sampler in the 1S1 is quite different from the sampler in the [[1S2]]. The 1S1 uses a [[sampling diodes|four-diode]] sampling bridge, terminated within the 1S1. The 1S2 uses a two-diode feed-through sampler, typical for TDR instruments. | ||
==Pictures== | ==Pictures== | ||