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The Tektronix Type P plug-in is a step response calibrator [[introduced in 1962]] for [[500-series scopes]]. 
{{Plugin Sidebar
It applies a step signal to the vertical input (plug-in connector pins 1 and 3) of the scope. 
|manufacturer=Tektronix
The step is generated by a mercury switch in the Type P and it has a 4 nanosecond risetime.   
|series=500-series scopes
The Type P is designed to simulate a Type [[K]] plug-in being driven by a Type [[107]] pulse generator. 
|type=Type P
In this sense, it is designed to act as a standard, not as an ideal square pulse source. 
|summary=Calibration aid
Why is this preferable to calibrating the mainframe using a square pulse? 
|image=Tek p front.jpeg
Would the high-frequency components of a square pulse cause problems?
|caption=Tek Type P
|introduced=1959
|discontinued=1964
|designers=
|manuals=
* [[Media:070-346.pdf|Tektronix Type P Manual]] (OCR)
* [[Media:tek_type_p_fcp.pdf|Tektronix Type P Factory Calibration Procedure]] (OCR)
* [[Media:Tek type p irb.pdf|Tektronix Type P Instrument Reference Book]] (OCR)
}}
The '''Tektronix Type P''' plug-in is a calibration aid [[introduced in 1959]] for [[500-series scopes]] that applies a fast (4 nanosecond risetime) voltage step to the mainframe vertical amplifier via plug-in connector pins 1 and 3.   


Type P was the only new plugin for 1959, unless you count the upgrade
Type P is designed to simulate a perfectly-adjusted Type [[K]] plug-in being driven by a Type [[107]] square-wave generator, and is used when adjusting the peaking coils and the [[delay line]].   
from Type 53/54[[C]] to Type [[CA]].  It was dropped after 1963.
The idea is to calibrate a mainframe using Type P, then use this mainframe and a 107 to calibrate other plug-ins.


* http://bama.edebris.com/manuals/tek/p/
The Type P does not contain any tubes, transistors, or tunnel diodes.
* http://w140.com/tek_fcp/tek_type_p_factory_cal_proc.pdf
It does contain a [[selenium rectifiers|selenium rectifier]] and a [[mercury switch]].
The selenium rectifier in the Type P has four sections and full-wave rectifies the 6.3 V<sub>AC</sub> that is supplied by the scope mainframe on pins 13 and 14.
The 120 Hz (assuming 60 Hz mains) component of the full-wave rectified waveform is applied to the coil of the mercury switch to drive the opening and closing of the contacts.
An adjustable fraction of the DC component of the full-wave rectified waveform is applied to the coil of the mercury switch to create a constant component in the magnetic field to bias the switch contacts to the best operating point.
 
The Type P was the only new plug-in for [[introduced in 1959|1959]], except for the upgrade from Type 53/54[[C]] to Type [[CA]]. It was dropped after 1963, replaced by the [[TU-7]].
 
==Pictures==


<gallery>
<gallery>
Image:Tek_type_p.jpg
Tek_type_p.jpg|Type P
Image:Type_p_schem.png
Type_p_inside.jpg|Type P
Type_p_schem.png|Type P Schematic
Tek 53-54p front.jpg|Type 53/54P
Tek 53-54p inside.jpg|Type 53/54P
</gallery>
</gallery>
{{Parts|P}}
[[Category:500 series plugins]]
[[Category:Calibration fixtures]]

Latest revision as of 10:18, 19 July 2023

Tektronix Type P
Calibration aid
Tek Type P

Compatible with 500-series scopes

Produced from 1959 to 1964

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix Type P plug-in is a calibration aid introduced in 1959 for 500-series scopes that applies a fast (4 nanosecond risetime) voltage step to the mainframe vertical amplifier via plug-in connector pins 1 and 3.

Type P is designed to simulate a perfectly-adjusted Type K plug-in being driven by a Type 107 square-wave generator, and is used when adjusting the peaking coils and the delay line. The idea is to calibrate a mainframe using Type P, then use this mainframe and a 107 to calibrate other plug-ins.

The Type P does not contain any tubes, transistors, or tunnel diodes. It does contain a selenium rectifier and a mercury switch. The selenium rectifier in the Type P has four sections and full-wave rectifies the 6.3 VAC that is supplied by the scope mainframe on pins 13 and 14. The 120 Hz (assuming 60 Hz mains) component of the full-wave rectified waveform is applied to the coil of the mercury switch to drive the opening and closing of the contacts. An adjustable fraction of the DC component of the full-wave rectified waveform is applied to the coil of the mercury switch to create a constant component in the magnetic field to bias the switch contacts to the best operating point.

The Type P was the only new plug-in for 1959, except for the upgrade from Type 53/54C to Type CA. It was dropped after 1963, replaced by the TU-7.

Pictures

  • Type P

    Type P

  • Type P

    Type P

  • Type P Schematic

    Type P Schematic

  • Type 53/54P

    Type 53/54P

  • Type 53/54P

    Type 53/54P


Some Parts Used in the P

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