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{{Plugin Sidebar | {{Plugin Sidebar | | ||
manufacturer=Tektronix | type=Type P | | manufacturer=Tektronix | series=500-series scopes| type=Type P | | ||
summary=Calibration aid | | summary=Calibration aid | | ||
image=Tek type p.jpg | | image=Tek type p.jpg | | ||
caption=Tek Type P | | caption=Tek Type P | | ||
introduced=1959 | | introduced=1959 | | ||
discontinued=1964 | | discontinued=1964 | | ||
designers=| | |||
manuals= | manuals= | ||
* [http://bama.edebris.com/manuals/tek/p/ Tektronix Type P Manual (PDF)] | * [http://bama.edebris.com/manuals/tek/p/ Tektronix Type P Manual (PDF)] | ||
| Line 14: | Line 14: | ||
* [[Media:Tek type p irb.pdf|Tektronix Type P Instrument Reference Book (PDF, OCR)]] | * [[Media:Tek type p irb.pdf|Tektronix Type P Instrument Reference Book (PDF, OCR)]] | ||
}} | }} | ||
The '''Tektronix Type P''' plug-in is a calibration aid [[introduced in 1959]] for [[500-series scopes]] that applies a | 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. | ||
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, | 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]]. | ||
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 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. | The Type P does not contain any tubes, transistors, or tunnel diodes. | ||
It does contain a [[selenium rectifiers|selenium rectifier]] and a [[mercury switch]]. | 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 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 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. | ||
The 120 Hz (assuming 60 Hz mains) component of the full-wave rectified waveform | 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. | ||
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 | 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]]. | ||
from Type 53/54[[C]] to Type [[CA]]. It was dropped after 1963, replaced by the [[TU-7]]. | |||
==Pictures== | ==Pictures== | ||