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7S14: Difference between revisions
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title=Tektronix 7S14| | title=Tektronix 7S14| | ||
summary=1 GHz dual-trace, delayed-sweep sampler| | summary=1 GHz dual-trace, delayed-sweep sampler| | ||
image=Tek 7s14.jpg| | image=Tek-7s14-front.jpg| | ||
caption=7S14 front| | caption=7S14 front| | ||
introduced=1974 | | introduced=1974 | | ||
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There are two 1.35 V mercury button cells, BT1 and BT2, in the sampler circuit. | There are two 1.35 V mercury button cells, BT1 and BT2, in the sampler circuit. | ||
They act as floating bias sources, so if a 7S14 stops working it may be not defective, | They act as floating bias sources, so if a 7S14 stops working it may be not defective, | ||
just dead | just the batteries are likely to be dead. First check the voltage on the cells. | ||
The original mercury cells can be replaced with other (less toxic) methods of | |||
methods of bias voltage generation. Two obvious solutions are photovoltaic | bias voltage generation. Two obvious solutions are photovoltaic cells or modern batteries. | ||
cells or modern batteries. The issue has been discussed extensively | The issue has been discussed extensively on the Yahoo TekScopes forum, so search the archives | ||
on the Yahoo TekScopes forum, so search the archives there for more information. | there for more information. Notably, Ed Breya posted [[7S14_repair|detailed notes on the 7S14 bias cell issue]]. | ||
Notably, Ed Breya posted [[7S14_repair|detailed notes on the 7S14 bias cell issue]]. | |||
The 7S14 has an integrated delay measurement function. | The 7S14 has an integrated delay measurement function. | ||
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<gallery> | <gallery> | ||
File:Tek-7s14-front.jpg | 7S14 front panel | |||
File:Tek-7s14-left.jpg | Left side | |||
File:Tek-7s14-right.jpg | Right side | |||
File:Tek-7s14-sampler.jpg | Sampler boards detail with cover removed | |||
File:Tek-7s14-trig-detail.jpg | Trigger board detail - tunnel diode oscillator (CR220, CR221, L220) | |||
File:7s14 samp.png | Sampler schematic | |||
File:7s14 trig2.png | Trigger schematic | |||
</gallery> | </gallery> | ||
[[Category:7000 series combined plugins]] | [[Category:7000 series combined plugins]] | ||
[[Category:Sampling plugins]] | [[Category:Sampling plugins]] | ||