7S11

The Tektronix 7S11 is a sampling plug-in for 7000-series scopes.

It takes one S-series sampling head, e.g. S-4 or S-6, to form a complete vertical plug-in. Bandwidth and sensitivity are determined by the sampling head, not the plug-in.

For operation, a 7T11 or 7S12 plug-in is needed, to which the 7S11 connects through contact strips on the right side of the plug-in. The control signals are routed to a similar strip on the left of the module for another 7S11 in a dual-channel configuration. An alternative configuration consists of a pair of 7S11s, one in the right vertical and the other in the A or only horizontal bay, for an X-Y display in free-running mode.

Key Specifications

Deflection factor	2 to 200 in 1-2-5 sequence, unit as labelled on the sampling head (usually mV, except for the optical-input S-42 scaled in mW)
DC Offset range	+/- 1 V
Offset output	10 × offset voltage, source impedance 10 kΩ
Vertical signal output	200 mV/Div, max. 2.4 Vp-p, source impedance 10 kΩ
Delay range	at least 10 ns
Weight	0.9 kg (3.25 lbs)

Internals

The 7S11 does not contain integrated circuits (except dual transistors).

Links

• Tekscope Vol. 2 No. 1, Feb 1970
• Tektronix 7S11 @ amplifier.cd
• Tektronix 7S11 @ barrytech.com

Pictures

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  7S11 with inserted S-4 head

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  7S11 with empty plugin bay

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  7S11 with inserted S-6 sampling head

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  spring-loaded contact block (right)

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  right side, cover removed

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  left side, cover removed

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  right side

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  left side

Measurements

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  7S11, 7T11, S-4 displaying a 1 GHz sine (normal mode)

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  7S11, 7T11, S-4 displaying a 1 GHz sine (smooth mode)

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  7S11, 7T11, S-4 displaying a 1 GHz sine (smooth mode, variable-persistence storage display of a 7613 mainframe)

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  Rackmount 7633 with two 7S11 and a 7T11 displaying 2GHz sinewave