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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)] | ||
}} | }} | ||
The '''Tektronix Type R''' is a plug-in for [[500-series scopes]]. | 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. | which is used to sense the collector current. | ||
fed to the base of the transistor through a resistor. | 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. | 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> | ||
Type_r_with_adapters.jpg | |||
Tek type r front.jpg | |||
Tek r left.jpg | |||
Tek r right.jpg | |||
Tek r top.jpg | |||
Tek r bottom.jpg | |||
Tek r sch1.png | |||
Tek r ps schem.png | |||
Tek type r with-386-852.JPG | |||
Tek type r double trigger.jpg | |||
</gallery> | </gallery> | ||
[[Category:500 series plugins]] | [[Category:500 series plugins]] | ||