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Revision as of 11:15, 21 September 2010 by Vintage dave (talk | contribs) (ten-turn pot, disconnect buttons)
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The Tektronix Type Z is a comparator plug-in for 500-series scopes. Its maximum sensitivity is 50mV/div, and it achieves 40,000 to 1 common-mode rejection at DC and low frequencies. Its risetime as a general-purpose amplifier is 27ns (13MHz bandwidth), but it can track a common-mode risetime of 7ns.

Type Z has two inputs, A and B, plus a precision comparison voltage, Vc, that is adjustable from 0 to +/-1V, 10V, or 100V via a ten-turn pot. It's possible to view A, -B, A-B, A-Vc, or Vc-B.

Unlike later comparators, it has a separate step attenuator for each input, permitting you to view the difference between signals of widely differing amplitudes. It is also the only comparator that can handle +/- 100V common mode at full sensitivity.

With a pair of "Disconnect Signal" buttons, Type Z was the first movement toward a "Gnd" position on the input switches.

The Type P6023 probe, with R and C compensation, was specifically designed for Type Z.

Type Z was introduced between 1960 and 1962 and uses both tubes and transistors, capitalizing on each's strengths.