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7S14: Difference between revisions
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7S14 is a dual-trace delayed sweep sampler plug-in. | 7S14 is a 1GHz dual-trace delayed sweep sampler plug-in. | ||
It is a complete sampling system unlike, for example, the [[7S12]], | |||
which requires a separate timing plug-in to provide triggering | |||
and sampling pulse generation. | |||
The 7S12 contains two samplers, trigger and sweep circuitry, | |||
and and circuitry to interface it with the 7000-series mainframe it which it operates. | |||
The mainframe provides the 7S14 with power. | |||
The 7S14 sends the mainframe horizontal, vertical, and readout signals. | |||
There are two 1.35V mercury button cells, BT1 and BT2, in the sampler circuit. | |||
They acting as floating bias sources, so if a 7S14 stops working it may be not defective, | |||
just dead batteries. First check the voltage on the cells. | |||
When the mercury cells die, you can replace them with other (less toxic) | |||
methods of bias voltage generation. Two obvious solutions are photovoltaic | |||
cells or modern batteries. The 7S14 bias cell issue has been discussed extensively | |||
on the Yahoo TekScopes forum, so search the archives there for more information. | |||
The 7S14 has an integrated delay measurement function. | |||
*Risetime = 350 ps (This means 1 GHz bandwidth) | *Risetime = 350 ps (This means 1 GHz bandwidth) | ||
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*delayed timebase | *delayed timebase | ||
*50 ohms input | *50 ohms input | ||
*allowed input voltage range is 5Vpk | |||
The 7S14 uses tunnel diode triggering and a two-diode sampler for each channel. | The 7S14 uses tunnel diode triggering and a two-diode sampler for each channel. | ||