S-2

Template:Plugin Sidebar 2 The Tektronix S-2 Sampling Head plug-in provides a single GR-874 50 Ω input with a 75 ps risetime.

The S-2 can be used in the 7000 series and 3S series of sampling plug-ins. It provides an internal trigger pickoff signal for internal triggering. Noise is specified as less than 10 mV.

When the S-2 was first introduced, the rise-time specification was 50 ps, but that was not achieved in practice, so the rise-time specification was revised to be 75 ps.

The interface between the GR-874 connector and the printed circuit board is described in US Patent 3,426,311.

Key Specifications

Rise time	75 ps
Bandwidth	4.66 GHz eq.
Input voltage	−1 to +1 V (max. −5 to +5)

Repair issues

The Sampling_diodes are easily damaged by excessive inputs or static discharge. See that article for possible replacements.

Pictures

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  early S-2 with tr ≤ 50ps on front

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  early S-2 with ‎overstickered tr ≤ 50ps

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  two S-2 engineering sample (late model)

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  S-52 and S-2 give 76 ps rise-time together

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  schematic

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  S-2 interior, strobe board side

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  S-2 interior, amplifier board side

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  Sampling diodes in place

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  Input termination resistor

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  Sampler board, right

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  Sampler board, left

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  Diode holder slides out

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  Sampler board underside

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  S-2 with amplifier board removed

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  Strobe board underside

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  S-2 with strobe board removed

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  S-2 pulse response