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* [[Media:Frye s4 gate.pdf|George Frye's Explanation of S-4 sampler in October 1968 Service Scope]] | * [[Media:Frye s4 gate.pdf|George Frye's Explanation of S-4 sampler in October 1968 Service Scope]] | ||
* [[Media:Tek s-4 fcp april 1969 - OCR.pdf|Tektronix S-4 Factory Calibration Procedure, April 1969]] (OCR) | * [[Media:Tek s-4 fcp april 1969 - OCR.pdf|Tektronix S-4 Factory Calibration Procedure, April 1969]] (OCR) | ||
* [[Media:Tek s-4 eis signatures page.pdf|Tektronix S-4 Engineering Instrument Specification signatures page]] | |||
}} | }} | ||
The '''Tektronix S-4''' is a sampling head for 7000- and 3S-series samplers. | The '''Tektronix S-4''' is a sampling head for 7000- and 3S-series samplers. |