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* [http://w140.com/tek_fcp/tek_type_r_factory_cal_proc.pdf Tektronix Type R Factory Calibration Procedure (PDF)]
* [http://w140.com/tek_fcp/tek_type_r_factory_cal_proc.pdf Tektronix Type R Factory Calibration Procedure (PDF)]
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The '''Tektronix Type R''' is a plug-in for [[500-series scopes]]. It is designed to measure risetime of a NPN and PNP transistors,  
The '''Tektronix Type R''' is a plug-in for [[500-series scopes]].
It is designed to measure risetime of a NPN and PNP transistors,  
but it works well with FETs as well.
but it works well with FETs as well.


Type R can operate in grounded-emitter or grounded-base configurations.   
Type R can operate in grounded-emitter or grounded-base configurations.   
In the grounded-emitter configuration, it provides a variable collector voltage through a collector resistor  
In the grounded-emitter configuration, it provides a variable collector voltage through a collector resistor  
which is used to sense the collector current. It provides a base bias voltage and a base pulse signal,  
which is used to sense the collector current.
fed to the base of the transistor through a resistor. The base pulse is generated by a [[mercury switch]]  
It provides a base bias voltage and a base pulse signal,  
fed to the base of the transistor through a resistor.
The base pulse is generated by a [[mercury switch]]  
and its rise time is specified to be less than 5 nanoseconds.   
and its rise time is specified to be less than 5 nanoseconds.   
Base and collector bias conditions can be set independently.   
Base and collector bias conditions can be set independently.   


The collector signal is AC-coupled to  
The collector signal is AC-coupled to  
an amplifier whose output is fed to the oscilloscope. The Type R has its own on-board low-voltage,  
an amplifier whose output is fed to the oscilloscope.
The Type R has its own on-board low-voltage,  
high-current regulated power supplies which feature germanium power transistors.
high-current regulated power supplies which feature germanium power transistors.


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==Pictures==
==Pictures==
<gallery>
<gallery>
Image:Type_r_with_adapters.jpg
Type_r_with_adapters.jpg
File:Tek type r front.jpg
Tek type r front.jpg
File:Tek r left.jpg
Tek r left.jpg
File:Tek r right.jpg
Tek r right.jpg
File:Tek r top.jpg
Tek r top.jpg
File:Tek r bottom.jpg
Tek r bottom.jpg
Image:Tek r sch1.png
Tek r sch1.png
Image:Tek r ps schem.png
Tek r ps schem.png
File:Tek type r with-386-852.JPG
Tek type r with-386-852.JPG
File:Tek type r double trigger.jpg
Tek type r double trigger.jpg
</gallery>
</gallery>


[[Category:500 series plugins]]
[[Category:500 series plugins]]

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