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-The Tektronix Type Z is a comparator plug-in for [[500-series scopes]].
+{{Plugin Sidebar
-Its two main subsystems are a differential amplifier and a precision variable
+|manufacturer=Tektronix
-DC voltage source, which can be used as one of the amplifier inputs.
+|series=500-series scopes
+|type=Type Z
+|summary=Comparator preamp plug-in
+|image=Tek Type Z front.jpg
+|caption=Type Z front view
+|introduced=1960
+|discontinued=1969
+|designers=Charlie Rhodes;Ron Olson
+|manuals=
+* [[Media:070-251.pdf|Tektronix Type Z Manual]] (OCR)
+* [[Media:tek_type_z_fcp.pdf|Tektronix Type Z Factory Calibration Procedure]]
+* [[Media:Tek type z cal outline.pdf|Tektronix Type Z Calibration Outline]] (OCR)
+}}
+The '''Tektronix Type Z''' is a comparator plug-in for [[500-series scopes]], [[introduced in 1960]] and dropped after 1968.
+The Type Z has two inputs, A and B, plus a precision comparison voltage, V<sub>C</sub>, that is
+adjustable from 0 to ±1 V, 10 V, or 100 V via a ten-turn pot.
+The following differential amplifier can be configured to display V<sub>A</sub>, −V<sub>B</sub>,
+V<sub>A</sub>−V<sub>B</sub>, V<sub>A</sub>−V<sub>C</sub>, or V<sub>C</sub>−V<sub>B</sub>.
 This allows DC-coupled measurements of small signals with large DC offsets.
-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.
-The Type Z has two inputs, A and B, plus a precision comparison voltage, Vc, that is
+Unlike later comparators, Type Z has separate step attenuators for each input,
-adjustable from 0 to +/-1V, 10V, or 100V via a ten-turn pot.  It's possible to
+permitting the user to view the difference between signals of widely differing amplitudes.
-view A, -B, A-B, A-Vc, or Vc-B.
+Unfortunately the divider resistors have no trim, so CMRR is poor except at 50mV/div.
+It is also the only comparator that can handle ±100 V common mode at full sensitivity.
+With a pair of "Disconnect Signal" buttons, the Type Z was the first
+movement toward a "GND" position on the input switches.
+The Type [[P6023]] probe with R and C compensation, [[introduced in 1962]],
+was specifically designed for the Type Z but also marketed for the Type [[G]].
+==Specifications==
+Maximum sensitivity is 50 mV/div, and common-mode rejection is 40,000:1 "from DC through audio frequencies".
+Risetime as a general-purpose amplifier is 27 ns (13 MHz bandwidth).  A side effect of Type Z's unprecedented dynamic range is that transient response is a function of signal amplitude: slew rates faster than 1V in 6ns will cause distortion due to grid current.
+[[Category:Specifications needed]]
+==Internals==
+The Type Z uses both tubes and transistors, capitalizing on the strengths of each.
-Unlike later comparators, it has a separate step attenuator for each input,
+The step attenuators are [[turret attenuators]].
-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.
-The Type Z uses two [[turret attenuators]].
-With a pair of "Disconnect Signal" buttons, the Type Z was the first of the movement toward a "Gnd"
+==Prices==
-position on the input switches.
+* $525 in 1962 ($4,750 in 2021 dollars)
-The Type Z was [[introduced in 1960]] and uses both tubes and transistors,
+==Links==
-capitalizing on the strengths of each.  It was dropped after 1968.
+* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/Z.html Type Z @ amplifier.cd]
-The Type [[P6023]] probe, [[introduced in 1962]] with R and C compensation,
+==Pictures==
-was specifically designed for the Type Z but also marketed for the Type [[G]].
-* [http://bama.edebris.com/manuals/tek/z/ Tektronix Type Z Manual (BAMA)]
+<gallery>
-* [http://w140.com/tek_fcp/tek_type_z_factory_cal_proc.pdf Tektronix Type Z Factory Calibration Procedure (PDF)]
+Tek Type Z front.jpg |Front view
+Tek z front.jpg|3/4 View
+Tek z 1.jpg| Front View
+Tek z 7.jpg | Front View
+Tek type z pre-prod.jpg|Pre-production Type Z with different knob color
+Tek z left.jpg|Left Side
+Tek z 5.jpg | Left Side
+Tek_TypeZ-RHS.jpeg | Right Side
+Tek z 2.jpg | Right Side
+Tek z 3.jpg | Right Side
+Tek z 6.jpg | Right Side  Tubes
+Tek_TypeZ-Top.jpeg  | Top
+Tek z 4.jpg | Rear
+</gallery>
+==Schematic==
 <gallery>
-Image:Tek z front.jpg|Front View
+Tek_z_turret.png|Attenuators
-Image:Tek z left.jpg|Left Side
+Tek_z_schem.png|Main Amplifier
-File:Tek_z_schem.png|Schematic
-File:Tek_z_turret.png|Attenuators
 </gallery>
+{{Parts|Z}}
+[[Category:500 series plugins]]
+[[Category:Differential amplifiers]]