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The '''Tektronix 661''' is a [[sampling oscilloscope]] that was [[introduced in 1961]]. | The '''Tektronix 661''' is a [[sampling oscilloscope]] that was [[introduced in 1961]]. | ||
It accepts two plug-ins, a sampling unit and a timing unit. | It accepts two plug-ins, a sampling unit and a timing unit. | ||
{{MissingSpecs}} | |||
==History== | ==History== | ||
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The Tektronix [[012-064]] is a plug-in extension cable for the 661. | The Tektronix [[012-064]] is a plug-in extension cable for the 661. | ||
== Mechanical == | == Mechanical == |